Emerging strategies in the treatment of poststroke depression and psychiatric distress in patients.

Poststroke depression (PSD) is a common sequela of stroke associated with increased morbidity and mortality among stroke survivors. PSD has been associated with poorer rehabilitative outcomes, longer inpatient stays, inefficient use of medical resources, worsened cognitive decline, and increased suicidality. This article reviews the definition and proposed etiology of PSD as well as current and emerging evidence-based prevention, screening, and treatment modalities. The timely use of prevention and treatment techniques including pharmacologic and nonpharmacologic methods may improve treatment outcomes and enhance the quality of life in stroke patients.

Introduction

According to a 2008 World Health Organization (WHO) report, stroke and other cerebrovascular diseases were the second leading cause of death in 2004, resulting in more than 5.7 million deaths and accounting for roughly 10% of deaths worldwide.1 Individuals who survive this potentially deadly event are often left with significant physiologic and psychiatric complications. The psychiatric sequelae of stroke and cerebrovascular disease include maladies such as anxiety,2 psychosis, posttraumatic stress disorder (PTSD),3 and poststroke depression (PSD).4 More specifically, PSD has been reported to have a prevalence of 25%–80% in stroke victims depending on the study instrument.5–8 In this article, we provide an up-to-date review of the etiology, diagnosis, treatment, and impact of PSD.

For an individual, the sequelae of stroke can be life-altering. A previously independent person may now require others to perform the most basic of daily activities. Others may find themselves unable to perform their jobs or participate in their usual social activities. This significant loss of function can result in profound and debilitating depression. Additionally, research has shown that depression compounds the disabling effects of a stroke,9–12 worsens cognitive decline,13,14 and increases suicidality as well as overall morbidity and mortality.15–17

For society, the costs associated with PSD are tremendous. PSD is associated with poorer rehabilitative outcomes,18 longer inpatient rehabilitation stays, increased inpatient and outpatient medical utilization,19,20 and inefficient use of rehabilitation services.21 The toll of caring for individuals with PSD significantly impacts the community at large, but is felt most acutely by those providing the day-to-day care of stroke survivors. Many caregivers experience provider fatigue, social isolation, and mood symptoms.22–24 These widespread costs to the survivor, their caregivers, and the community at large show the need for further research in this area and aggressive multidisciplinary treatment inclusive of all affected.

Defining PSD

A very wide range of PSD prevalence estimates exist in the current literature. This variability stems from the difficulty in assessment and diagnosis of depression in stroke survivors. Currently, there is no standardized, widely accepted measure of PSD. The heterogeneity of cognitive and functional deficits in stroke survivors makes standardized measures difficult. Prevalence estimates in this population may be over-or underdiagnosing this disorder due to the difficulty in distinguishing depressive symptoms from stroke sequelae.25 The most appropriate means of diagnosing PSD have remained uncertain since the mid-twentieth century when it was first understood as a significant complication of stroke. The heterogeneous symptoms comprising PSD have been a continual source of controversy in field of geriatric psychiatry given a lack of consensus on etiology, pathogenesis, and course in stroke survivors.26

There are four methodological approaches to the diagnosis of PSD:27 the inclusive approach,28 the etiologic approach,29 the substitutive approach,30 and the exclusive approach.31 Under the inclusive approach, all depressive symptoms would be considered at face value regardless of underlying pathogenesis. 28 Critics of this approach point to overdiagnosis of depression in patients where neurovegetative symptoms are better categorized as stroke symptoms. The etiologic approach would count depressive symptoms only if the clinician believes the symptom is related to organic depression and not stroke-related deficits.29 The substitutive approach uses other psychological symptoms of depression in place of neurovegetative symptoms.30 Under this paradigm, neurovegetative symptoms are excluded because of the confounding vegetative symptoms associated with stroke. Finally, the exclusive approach only includes symptoms more prevalent in depressed versus nondepressed stroke survivors.31

Etiology of PSD

As is the case with nonstroke-related depression, the two primary sources of pathology in the development of PSD are biological and psychosocial. In the following section, we explore the evidence supporting both the biologic and psychosocial causes of this disorder.

Biological evidence

One would not be reading this article were it not for the strong association between the decidedly biologic phenomenon of stroke and the development of depression. Alexopoulos et al32 outlined the following four areas of clinical evidence supporting the biologic hypothesis of PSD: 1) the increased prevalence of depression in patients with hypertension, diabetes, and coronary artery disease,33–35 2) the increased prevalence of depression among patients after stroke,36,37 3) the strong association of late-onset depression and the increased frequency of silent stroke and white matter hyperintensities,38–41 and 4) the rare association of family history of mood disorders in the context of silent stroke.42

The development of depression is more likely after stroke compared to any other physical disability.43 Researchers since the 1970s have proposed various mechanisms by which ischemic insult to certain areas of the brain results in depressed mood.44–47 Early hypotheses posit that ischemic insults to neural circuits of mood regulation, specifically left frontal subcortical circuits, result in depletion of biogenic amines and contribute to symptoms of depression.48,49 The association between ischemic lesions in the frontal lobe and depression is strongest early in the poststroke period, but this association appears to wane over time.46 Perhaps, this temporal association represents adjustment disorder with depressed mood in the early phase of recovery that resolves after the patient regains some level of function.

Some authors have suggested that the significant physical disability associated with stroke likely contributes to depressive symptoms in poststroke patients. However, early research found no significant difference in the severity of depression between groups of elderly patients with chronic disability due to stroke and a matched control group with extracerebral disorders.50 Subsequently, research has shown PSD to develop even in patients with anosognosia.51,52 Patients with anosognosia are unaware of physical deficits associated with their stroke yet exhibit depressive symptoms similar to patients with equivalent levels of disability. Even in the absence of disability, patients with ischemic insults to striatofrontal circuits demonstrate higher rates of depression compared to patients with ‘silent’ infarcts.32,38,40 This evidence supports the model of PSD as having at least an aspect that is primarily biologic despite early research to the contrary.

Psychosocial evidence

Multiple studies have attempted to localize a lesion consistent with PSD, but recent literature does not support discrete localized ischemia as the sole cause of depressive symptoms.53,54 The severity of depression and the prevalence of depressive symptoms after stroke have been found to be comparable to other illnesses with equivalent levels of disability.6,55 In fact, a systematic review by Carson et al found no increased risk of depression after stroke based on the location of a brain lesion over time.53 This evidence contradicts the evidence presented demonstrating an association between frontal lesions and the development of early depression. Studies differ in conclusions based on when subjects are sampled for symptoms. Although earlier symptoms have been associated with localization of brain lesions, subjects sampled more than 1 year after stroke show no such association.

Similar to nonstroke-related depression, one is able to predict the development of PSD using a number of psychosocial factors.56,57 Kendler found that stressful life events, genetic factors, a previous history of major depressive disorder (MDD), and neuroticism contributed equally to the development of depression in stroke and nonstroke patients.56 Functional disability after stroke appears to be the strongest risk factor for developing PSD. More than 15 articles found disability to be the strongest predictor of PSD,55,58,59 while just as many studies failed to find this association.58,60 Singh et al found that an important predictor of the development of PSD immediately poststroke was localization of the lesion while at 3 months severity of disability became significantly more predictive than lesion location.61

If the etiology of PSD were purely biological, resulting from brain lesions secondary to stroke, the development of PSD should not be influenced by prior psychiatric history or life experience, yet clinical studies have indeed found these factors to be important in the development of PSD. According to Whyte and Mulsant, 8 of 14 studies showed past psychiatric history to be a risk factor in the development of PSD.58 Family history has also been shown to be a risk factor in the development of PSD.62–65 Further evidence indicates that personality disorders, social isolation, and poor familial support predispose individuals to developing depression after stroke.59,63,64,66,67 Proponents of the biologic hypothesis of PSD suggest that evidence of past psychiatric history, family history, and premorbid-functioning-associated risk does not necessarily contradict the biologic underpinnings of this disorder but serve as markers of susceptibility to a uniquely biologic process.

As can be seen from the preceding discussion, the data in this area are voluminous, contradictory, and indecisive regarding the degree to which biologic and psychological factors contribute to the development of PSD. On the basis of this evidence, PSD is most likely a multifactorial disorder. Minimizing or marginalizing the significant psychological stress and trauma associated with the acute development of disability associated with stroke would be ill advised, while the evidence indicates that particular lesion locations are strongly associated with the development of PSD in the early poststroke period. Like many other diseases involving the brain, this disorder might be best characterized by the stress–diathesis model or the two-hit hypothesis where a genetic or psychological predisposition to depression confers an increased susceptibility to the biological and psychiatric sequela of stroke. The degree to which these biological and psychological factors confer increased risk to an individual remains poorly understood.

Prevention and diagnosis

Prevention of PSD begins with the prevention of stroke. Annually, in the United States, approximately 610,000 people suffer stroke for the first time.68 Major modifiable risk factors for stroke include hypertension, diabetes, cigarette smoking, and hyperlipidemia.69 Despite widespread acknowledgment of these risk factors, stroke remains the third leading cause of death in the United States.68 Primary care physicians and mental health providers should be vigilant in monitoring blood pressure, cholesterol, and glucose control while encouraging smoking cessation. Family history is vitally important to properly assess the risk factors for stroke and depression. A family history of early-onset stroke or depression should result in earlier and more aggressive prevention strategies.

At the present time, there is little evidence to support the prophylactic treatment of stroke patients with antidepressant medications. In a review of 14 clinical trials, pharmacotherapy showed no clear effect in preventing PSD, but psychotherapy did show a statistically significant, though small, effect.70 To date, only one study has shown a significant benefit using an antidepressant (sertraline) as a prophylaxis against PSD. This study was a double-blind, placebo-controlled study of 155 patients over a 12-month period, and it showed 10% PSD in the treatment group and 30% in the placebo group.71 The appropriate mechanisms for prevention remain unclear but given the limited downside to psychotherapy, such an approach seems a safe and appropriate course until further research is concluded.

Patients who suffer a stroke should be screened for symptoms of depression throughout their poststroke course. There is little consensus regarding the exact timing of PSD screening given the inherent heterogeneity of the disease etiology. Further complicating matters is the natural interindividual variability of stroke survivors. Despite this variability, there are some general principles evident in the current literature. In 2002, Whyte and Mulsant reviewed the prevalence of MDD after stroke based on the time since stroke.58 Peak in symptoms occurred approximately 3–6 months after stroke with a subsequent 50% decline in prevalence by 1 year.58 This finding suggests that screening should occur more frequently (eg, monthly) in the initial poststroke period and should continue at regular intervals (eg, annually) for any stroke survivor.

Several risk factors for PSD also appear to be strongly correlated to PSD symptom severity. These risk factors include the discrepancy between premorbid and poststroke physical functioning,72 a history of a psychiatric condition (eg, depression),63 female sex,61,64 location of CVA lesion,73 and reversal of social roles.74 Cognitive impairment secondary to stroke14,59 and communication difficulties due to aphasia also contribute to increased rate of PSD in elderly populations.14,75 Patients with limited social supports also have higher rates of depression after stroke.6,74 These risk factors coupled with a biologic predisposition to depression based on a family history increase the likelihood of disease development. Screening and evaluations for PSD should include these factors at a minimum in order to assess the likelihood of the disorder and the potential severity of symptoms. Individuals with either numerous risk factors for developing PSD and/or factors indicating a more severe case of PSD need increased monitoring, preferably by experienced professionals.

In addition to a careful history and evaluation of PSD risk factors, psychometric tests may also be useful in assessment and monitoring. As indicated in the preceding section entitled, ‘defining PSD,’ the way one defines PSD determines the measures employed to diagnose the illness. Gianotti et al designed the poststroke depression rating scale (PS-DRS) in order to examine the phenomenology of PSD.76,77 This measure was developed to assess emotional, affective, and vegetative defects after stroke. Table 1 provides a list of items included in the PS-DRS. Their results demonstrated a high correlation between depression and disability but did not validate the addition of apathy, hyperemotionalism, and catastrophic reactions in determining the presence or absence of PSD.

Table 1

Items included in the post stroke depression rating scale (PS-DRS)

Depressed mood

Guilt feelings

Thoughts of death or suicide

Vegetative symptoms

Apathy and loss of interest

Anxiety

Catastrophic reaction

Hyperemotionalism

Anhedonia

Diurnal mood variations

There have been several measures validated for screening of major depressive symptoms (DSM-IV criteria) in stroke patients. The Beck depression inventory (BDI), hospital anxiety and depression scale (HADS), SCL-90, and Hamilton depression rating scale (HDRS) have all been validated in poststroke patients with good sensitivity and specificity.78 In a recent study by Healey et al the brief assessment schedule depression cards (BASDEC) were found to be the most accurate screening tools for PSD compared to the HADS and BDI (fast screen).79 Using the BASDEC will result in less false positives and more efficient screening and treatment of PSD patients.

All tests may not be valid for a given individual based on poststroke cognitive disability and language deficits. Researchers have developed assessments to adapt to the cognitive deficits suffered by many stroke survivors. Gordon and Hibbard developed the structured assessment of depression in brain-damaged individuals (SADBD).5 This assessment only requires yes or no answers from participants and also includes visual cue cards for patients with aphasiac symptoms. In general, this diagnostic tool has not been widely adopted because of a lack of a graded response or suitability in patients with severe comprehension difficulties. Other researchers have developed measures that have been shown to be valid to detect depressive symptoms in aphasic stroke patients, namely, the stroke aphasic depression questionnaire (SADQ-10).80 It is important for providers to assess deficits in patients prior to administering screening questionnaires to ensure the validity of the test.

Once a patient is identified with depressive symptoms, there are few reliable predictors of treatment outcomes. Onset of depressive symptoms after stroke appears to be predictive of PSD duration and treatment outcome. Stroke survivors who develop depressive symptoms within hours after stroke have a better prognosis for resolution of depressive symptoms within 1 year of onset.81,82 However, approximately 30% of patients develop PSD up to 6 months after stroke.83 Among patients who have delayed onset of depressive symptoms, Anderson et al found that patients developing depression 7 weeks after stroke had lower rates of spontaneous recovery.84

Prevention of disease should be the highest priority for physicians; however, when stroke occurs, providers should be vigilant for symptoms of depression. Although psychometric tools are helpful in the diagnosis and treatment of PSD symptoms, a thorough history of premorbid risk factors is absolutely essential for guiding diagnosis and choosing the most appropriate treatment modality. The timing of onset of PSD symptoms after stroke may indicate which patients are refractory to typical treatment as outlined in the following section.

Treatment of PSD

To treat or not to treat

Several reviews of this topic indicate that a large portion of providers are uncomfortable with prescribing an antidepressant, antipsychotic, or stimulant to an elderly patient after stroke.85 Conservative management of these patients is certainly not without merit. Many of these patients are on multiple medications, and the addition of yet another medication may have an unforeseen consequence such as a drug interaction. Additionally, there is an increased risk of bleeding associated with selective serotonin reuptake inhibitor (SSRI) and an increased risk of stroke associated with the long-term use of atypical antipsychotics.86 These risks should be carefully considered prior to prescribing such medications.

Some providers consider depression as a natural byproduct of significant physical disability after stroke that will eventually resolve over time as the patient adapts to his or her new disability. Research has shown, however, that the use of antidepressants can result in significant improvement of symptoms regardless of the physical disability. In a recent review of more than 50 studies, antidepressant medications were shown to be more effective than placebo for treatment of depressive symptoms in poststroke patients.87 Improvement of depressive symptoms will generally result in improved functional recovery and rehabilitative outcomes.88 This evidence suggests that despite the potential risks, consideration should be given to pharmacotherapeutic interventions in PSD (Table 2).

Table 2

Current evidence-based treatments for post stroke depression

Intervention	Level of recommendation
Selective serotonin reuptake inhibitors	Moderate evidence of utility
Tricyclic antidepressants	Moderate evidence of utility
Atypical antipsychotics	Evidence is lacking to make recommendation
Mood stabilizers	Evidence is lacking to make recommendation
Stimulant medications	Moderate evidence of utility
Cognitive behavioral therapy	Likely small net benefit

Tricyclic antidepressant therapy

Tricyclic antidepressants (TCAs) have been shown to be efficacious in the treatment of PSD (Table 3). In 2000, a double-blind, randomized, placebo-controlled trial by Robinson et al demonstrated a significant decrease in Hamilton depression scale (HAM-D) scores in patients treated with nortriptyline for 12 weeks compared to fluoxetine and placebo treatment groups.89,90 Additionally, patients treated with nortriptyline showed a decrease in anxiety symptoms and improved recovery of activities of daily living.89

Table 3

Trials for the treatment of post stroke depression

Treatment studied	Author	Type of trial	N	Diagnostic criteria	Outcome measure	Trial length (weeks)	Time from stroke (months)	Treatment response	Placebo
Nortriptyline	Lipsey et al90	RCT	34	DSM IIIMajorMinor	HDRSZSRDS	4–6	<18	36%†	22%†
	Robinson et al89	RCT	56	DSM IVMajorMinor	HDRS	12	<6	63%‡	23%‡
Fluoxetine	Robinson et al89	RCT	56	DSM IVMajorMinor	HDRS	12	<6	9%	23%
	Wiart et al112	RCT	66	ICD-10Major	MADRS	6	<6	63%‡	33%‡
	Fruehwald et al92	RCT	54	DSM IVMajorMinor	HDRSBDI	1672	<1	69.2%81.8%*	75%27.8%*
	Choi-Kwon et al93	RCT	152	DSM IVMajorMinor	BDIClinicalSTAS	1626	14	28.7%27.1%	15.5%14.7%
Sertraline	Murray et al91	RCT	123	DSM IVMajorMinor	MADRSEDS	26	1–52	33.9%	42.6%
Citalopram	Andersen et al84	RCT	66	DSM IIIMajorMinor	HDRSMES	16	4	65%†	15%†
Methylphenidate	Grade et al101	RCT	22	DSM IVMajorMinor	HDRSZSRDS	3	<1	28%‡	24%‡
Cognitive behavioral therapy	Lincoln et al106	Case series	19	DSM IVMajorMinor	BDIHADS	16	<1	24%‡	NA
	Lincoln & Flannaghan108	RCT	123	DSM IVMajorMinor	BDI	16	1	29%	13%

Notes:

P < 0.005

P < 0.05

P < 0.05, post-hoc exploratory analysis with significant placebo drop-out.

Abbreviations: RCT, double-blind randomized controlled trial; BDI, Beck Depression Inventory; DSM IV, Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition; HADS, Hospital Anxiety and Depression Scale; HDRS, Hamilton Depression Rating Scale; MADRS, Montogomery–Asberg Depression Rating Scale; MES, Melancholia Scale; STAS, Spielberger Trait Anger Scale; ZSRDS, Zung Self Rating Depression Scale.

There is little doubt that TCAs are effective in the treatment of depressive symptoms; however, these drugs confer a therapeutic benefit as well as a significant clinical risk of side effects. Alpha-1-adrenergic blockade by TCAs may result in orthostatic hypotension, making patients prone to falls and thus intracranial hemorrhage. The affinity of TCAs for histaminergic receptors causes increased sedation which may decrease intellectual functioning – a poorly tolerated side effect in poststroke patients. Anticholinergic side effects of TCAs include urinary retention, dry mouth, and constipation. TCAs are also a type 1a antiarrhythmic which can result in QT prolongation and torsades de pointe. Stroke patients with likely coronary artery disease may be particularly susceptible to the arrhythmogenic effects of TCAs. These side effects are the primary reason that TCAs see limited use in both general practice and in the treatment of PSD.

SSRI therapy

The efficacy of a number of SSRIs for PSD have been studied over the past few decades. Most SSRIs have demonstrated minimal efficacy in the treatment of PSD, supporting the hypothesis of PSD as uniquely different from MDD. In five double-blind, placebo-controlled studies, sertraline and fluoxetine were no better than placebo in treatment or prevention of PSD.71,91–94 The lengths of these studies are significant limitations as most only lasted for 12 weeks, possibly not providing enough time to observe a significant change in subjects. It is also important to note that while some studies show no improvement of poststroke depressive symptoms, many studies demonstrate functional improvement with the use of SSRI medications.88,95 Fruewald et al followed patients for additional time (18 months) and found improvements in depressive symptoms among those in the fluoxetine group with significant dropout in the placebo group.92 Of the SSRIs studied in the treatment of PSD, citalopram has shown the most benefit as demonstrated by symptom reduction on the BDI scale.84,96 Despite the mixed evidence regarding the efficacy of SSRIs in the treatment of PSD, they remain the recommended first-line pharmacotherapy for PSD given favorable side effect profile.97 Suggested treatment guidelines for PSD acknowledge there is no evidence to suggest that SSRIs improve PSD symptoms better than TCAs.97,98 However, given the unwanted side effects of TCAs, as outlined in the previous section, an SSRI should be considered first.

No medication is without potential adverse side effects. SSRIs are no exception. SSRI side effects include GI upset, diarrhea, insomnia (REM attenuation), headache, increased anxiety, sexual dysfunction, and increased suicidal ideation in young patients. Increased risk of bleeding resulting from inhibition of platelet aggregation caused by SSRIs is an important consideration for elderly stroke patients potentially on anticoagulation medications. Other adverse side effects include drug–drug interactions via cytochrome P450 inhibition. Fluvoxamine is a ‘pan inhibitor’ with significant effects on CYP1A2, CYP2C19, CYP2C9, CYP2D6, and CYP3A4.99 All SSRIs have some level of CYP2D6 inhibition, but fluoxetine and paroxetine are potent inhibitors of CYP2D6. Given the large number of medications metabolized at CYP2D6 and the frequency of polypharmacy in the elderly population, careful consideration of each addition or subtraction of medication is strongly suggested. Drug interactions can result in life-threatening toxicities or ineffective therapies despite being on a ‘standard dose’ of medication.

Atypical antipsychotics

Atypical antipsychotics are often used in the treatment of PSD patients to target symptoms such as mood lability and irritability. Although there are significant risks in long-term administration of this class of medications, short-term use may be helpful during the acute rehabilitation phase. Studies demonstrating the association between atypical antipsychotics and increased risk for stroke have been focused on elderly populations with prolonged antipsychotic use. All patients should be counseled on the risks of smoking and OCP use while on atypical antipsychotics as they may compound the risk of stroke. Providers should weigh the risks, benefits, alternatives, and precautions with both patients and caregivers prior to prescribing atypical antipsychotics in PSD patients.

Mood stabilizers

To our knowledge, there have been no human trials investigating the use of lithium or of other mood stabilizers in the treatment of PSD or related sequelae. Animal model studies, however, have indicated a limited role for the use of lithium in the treatment of mood lability and irritability following stroke. Yan et al.100 demonstrated that lithium reduces behavioral disturbances in rats poststroke and reported lithium as protective for ischemia-reperfusion injury resulting in improved grooming, spatial learning, and memory ability.58,100 Histologically, rats treated with lithium prior to CVA had decreased cell death in the hippocampal CA1 region.101 Other studies indicate that lithium may stimulate hippocampal neurogenesis via the extracellular signal-regulated kinase pathway.101

Stimulant medications

Stimulants have also shown some utility in the treatment of PSD and fatigue after stroke. Methylphenidate in particular has been shown to lower HAM-D scores in a randomized, controlled trial of PSD patients.102 Modafinil has shown efficacy in the treatment of poststroke fatigue, but research has yet to establish the optimal strategy for its use.103 Although the exact mechanism of action for modafinil is not entirely understood, it differs from the mechanism of action of amphetamines. Preclinical evidence suggests that modafinil decreases GABA activity in the area of the ascending reticular activating system thus promoting arousal.104 Modafinil lacks the peripheral sympathomimetic effects associated with methylphenidate use and is generally not associated with aggressive behavior. Stimulant medications have also been associated with increased ability to participate in physical therapy after a stroke.105 Despite the benefit of increased energy and decreased perceived disability, some stimulant medications such as methylphenidate carry a side effect profile that may actually worsen the patients’ ability to participate in therapy.106 Side effects of stimulant medications include rare instances of mania, psychosis, suicidal ideation, depression, and stroke. Considerable caution should be exercised when weighing the risks and the benefits of stimulant use in poststroke patients as patients might be exquisitely sensitive to side effects of these medications. Given the increased sensitivity of this population, providers may consider initiating treatment at a low dose and slowly titrating increases in medication to target neurovegetative symptoms. Additionally, these medications should be used in a targeted and short-term fashion.

Psychotherapy

There is mixed evidence regarding the efficacy of CBT in PSD patients. Several studies have demonstrated the efficacy of CBT in the treatment of depression in adults and elderly patients. A study by Lincoln et al found CBT to improve mood in a small study of 19 stroke patients with depression.107 Likewise, a study of 41 elderly patients with disabilities, some with stroke (n = 18), demonstrated significant improvement in depressive symptoms with brief CBT group therapy.108 However, a randomized, controlled trial of CBT for the treatment of PSD in 123 patients did not find CBT to be efficacious.109 There were significant limitations to this recent randomized trial including a small sample size possibly lacking enough power to detect a significant difference between groups, shorter duration of treatment than previous studies, and no prescreening of patients into various treatment modalities. Patients were randomly assigned to treatment groups from a stroke register instead of being referred by a clinician for CBT based on the patients’ wiliness and capacity to engage in the cognitive model. As with other therapies, it is difficult to fully assess the efficacy of CBT because of the heterogeneous nature of cognitive and motor deficits associated with strokes.

Other psychotherapy methods including problem-solving training and motivational interviewing have also been shown to improve mood after stroke but not specifically depressive symptoms in PSD. In a randomized, controlled trial of more than 400 patients, Watkins et al demonstrated an overall mood improvement on the general hospital questionnaire (GHQ-28).110 Motivational interviewing showed no improvement in the functional recovery of patients. In 2007, Robinson et al published research indicating that patients undergoing problem-solving therapy after stroke had a significantly lower incidence of depression over 12 months of treatment compared with placebo. However, this result was not statistically significant using an intention-to-treat analysis.111

Conclusion

Depression is a common psychiatric condition after stroke. Depression, like other psychiatric illnesses, compounds physical symptoms and contributes to increased morbidity, mortality, and poor rehabilitative outcomes. Providers should be committed to stroke prevention strategies including coordination with primary care providers regarding aggressive management of hypertension, diabetes, and other risk factors. For patients who have suffered a stroke, providers should regularly screen for symptoms of depression. Screenings should take a multifactorial approach given the heterogeneity of symptoms arising from a range of biopsychosocial factors. When treating PSD, it is recommended that providers carefully review the risks, benefits, and therapeutic alternatives with patients and their caregivers. Treatments should be tailored to the patients’ symptom profile and their cognitive and physical deficits. Medications should be started slowly and titrated to the minimum dose needed to treat target symptoms of depression. Patients in this population are particularly sensitive to medication side effects and have increased risk of polypharmacy drug interactions while on multiple medications. Successful treatment of PSD symptoms improves treatment outcomes, enhances quality of life, and ultimately decreases morbidity and mortality in stroke patients.