N Wisniacki1, W Taylor, M Lye, J P H Wilding. 1. Diabetes and Endocrinology Research Group, Department of Medicine, University of Liverpool, Liverpool, UK. n.wisniacki@liv.ac.uk
Abstract
OBJECTIVE: To evaluate insulin resistance and systemic inflammation in older patients with systolic (SHF) or diastolic heart failure (DHF). PATIENTS: 52 non-diabetic patients (> 70 and < 90 years old) with chronic heart failure (CHF) and hospitalised within the previous six months for heart failure were studied, together with a control group of older healthy volunteers (n = 26). On the basis of Doppler echocardiographic criteria patients were classed as having SHF (n = 27) or DHF (n = 25). MAIN OUTCOME MEASURES: Fasting glucose, insulin, C reactive protein, interleukin 6, and tumour necrosis factor alpha soluble receptor II (TNF-alphaSRII) concentrations were determined. Insulin resistance was estimated by the homeostasis model assessment (HOMA). RESULTS: HOMA index (median, interquartile range) was higher in patients with DHF (1.77, 1.06-2.26) than in patients with SHF (0.97, 0.81-1.85) or healthy volunteers (1.04, 0.76-1.44; p = 0.01). After adjustment for body mass index, age, and use of angiotensin converting enzyme inhibitors, both groups of patients with CHF were more insulin resistant than were healthy volunteers (p = 0.02). C reactive protein, interleukin 6, and TNF-alphaSRII were all significantly (p < 0.001) higher in patients with DHF and SHF than in healthy volunteers. All markers of systemic inflammation were independently associated with the presence of clinical CHF. CONCLUSION: Insulin resistance and inflammatory activation are present in older patients with SHF and DHF.
OBJECTIVE: To evaluate insulin resistance and systemic inflammation in older patients with systolic (SHF) or diastolic heart failure (DHF). PATIENTS: 52 non-diabeticpatients (> 70 and < 90 years old) with chronic heart failure (CHF) and hospitalised within the previous six months for heart failure were studied, together with a control group of older healthy volunteers (n = 26). On the basis of Doppler echocardiographic criteria patients were classed as having SHF (n = 27) or DHF (n = 25). MAIN OUTCOME MEASURES: Fasting glucose, insulin, C reactive protein, interleukin 6, and tumour necrosis factor alpha soluble receptor II (TNF-alphaSRII) concentrations were determined. Insulin resistance was estimated by the homeostasis model assessment (HOMA). RESULTS: HOMA index (median, interquartile range) was higher in patients with DHF (1.77, 1.06-2.26) than in patients with SHF (0.97, 0.81-1.85) or healthy volunteers (1.04, 0.76-1.44; p = 0.01). After adjustment for body mass index, age, and use of angiotensin converting enzyme inhibitors, both groups of patients with CHF were more insulin resistant than were healthy volunteers (p = 0.02). C reactive protein, interleukin 6, and TNF-alphaSRII were all significantly (p < 0.001) higher in patients with DHF and SHF than in healthy volunteers. All markers of systemic inflammation were independently associated with the presence of clinical CHF. CONCLUSION:Insulin resistance and inflammatory activation are present in older patients with SHF and DHF.
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