Mary C McHugh1, Deborah B Diercks2. 1. Department of Emergency Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard E4.300, Dallas, TX, 75390, USA. Mary.mchugh@utsouthwestern.edu. 2. Department of Emergency Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard E4.300, Dallas, TX, 75390, USA.
Abstract
PURPOSE OF REVIEW: As the high-sensitivity cardiac troponin (hs-cTn) becomes more broadly used, physicians must understand the strengths and limitations of using the hs-cTn in the hypertensive population. RECENT FINDINGS: The most common cause of hs-cTn elevation is cardiac myocyte injury and death; alternate mechanisms for hs-cTn elevation in the absence of cardiac myocyte death are not clearly understood. Hs-cTn elevation has been found in significant proportions of patients with asymptomatic hypertension, in patients with acute hypertensive crisis, and has even been used to predict patients who will go on to develop hypertension. While the mechanisms remain undefined, there is evidence that elevations in hs-cTn are associated with both short- and long-term morbidity and mortality. While ongoing research further defines the relationship between hypertension and hs-cTn, the emergency medicine physician must make clinical decisions today regarding the utility of this increasingly used biomarker. Given the current evidence, clinical context must be utilized including a complete clinical picture, EKGs findings, and importantly serial hs-cTn when needed to establish whether myocardial injury or myocardial infarction is occurring.
PURPOSE OF REVIEW: As the high-sensitivity cardiac troponin (hs-cTn) becomes more broadly used, physicians must understand the strengths and limitations of using the hs-cTn in the hypertensive population. RECENT FINDINGS: The most common cause of hs-cTn elevation is cardiac myocyte injury and death; alternate mechanisms for hs-cTn elevation in the absence of cardiac myocyte death are not clearly understood. Hs-cTn elevation has been found in significant proportions of patients with asymptomatic hypertension, in patients with acute hypertensive crisis, and has even been used to predict patients who will go on to develop hypertension. While the mechanisms remain undefined, there is evidence that elevations in hs-cTn are associated with both short- and long-term morbidity and mortality. While ongoing research further defines the relationship between hypertension and hs-cTn, the emergency medicine physician must make clinical decisions today regarding the utility of this increasingly used biomarker. Given the current evidence, clinical context must be utilized including a complete clinical picture, EKGs findings, and importantly serial hs-cTn when needed to establish whether myocardial injury or myocardial infarction is occurring.