Hypertrophic cardiomyopathy arrhythmogenesis: Difference between revisions
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==Overview== | ==Overview== | ||
Patients with hypertrophic cardiomyopathy are at risk of arrhythmias and sudden death. | Patients with hypertrophic cardiomyopathy are at risk of arrhythmias and sudden death. Abnormal filling of the left atrium may result in the left atrial dilation which may predispose the patient to [[atrial fibrillation]]. The presence of [[myocardial disarray]] and [[myocardial ischemia]] (due to microvascular dysfunction and episodes of reduced cardiac output) may predispose the patient to [[ventricular tachycardia]], [[ventricular fibrillation]], and [[sudden cardiac death]]. | ||
==Atrial Arrhythmias | ==Atrial Arrhythmias== | ||
==Ventricular Arrhythmias== | ==Ventricular Arrhythmias== | ||
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It must be emphasized that atrial arrhythmias (which are commonly detected on ambulatory monitoring) can lead to ischemia and hemodynamic compromise leading to sudden death in these patients as well. | It must be emphasized that atrial arrhythmias (which are commonly detected on ambulatory monitoring) can lead to ischemia and hemodynamic compromise leading to sudden death in these patients as well. | ||
==Autonomic Imbalance== | |||
Assessment of autonomic function in patients with HCM often reveals abnormal responses of heart rate and blood pressure to exercise in two-thirds, which was associated with a more malignant clinical course, suggesting that autonomic imbalance may also be important in the genesis of sudden cardiac death in these patients. | Assessment of autonomic function in patients with HCM often reveals abnormal responses of heart rate and blood pressure to exercise in two-thirds, which was associated with a more malignant clinical course, suggesting that autonomic imbalance may also be important in the genesis of sudden cardiac death in these patients. | ||
Revision as of 22:46, 7 August 2011
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Differentiating Hypertrophic Cardiomyopathy from other Diseases |
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Hypertrophic cardiomyopathy arrhythmogenesis On the Web |
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Directions to Hospitals Treating Hypertrophic cardiomyopathy |
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Risk calculators and risk factors for Hypertrophic cardiomyopathy arrhythmogenesis |
Editors-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Patients with hypertrophic cardiomyopathy are at risk of arrhythmias and sudden death. Abnormal filling of the left atrium may result in the left atrial dilation which may predispose the patient to atrial fibrillation. The presence of myocardial disarray and myocardial ischemia (due to microvascular dysfunction and episodes of reduced cardiac output) may predispose the patient to ventricular tachycardia, ventricular fibrillation, and sudden cardiac death.
Atrial Arrhythmias
Ventricular Arrhythmias
HCM also causes disruptions of the electrical functions of the heart and can be associated with sudden cardiac death.
Primary arrhythmias, the presence of scar or fibrosis, hemodynamic instability with diminished stroke volume, and/or ischemia have been implicated in the etiology of sudden cardiac death in HCM.
It must be emphasized that atrial arrhythmias (which are commonly detected on ambulatory monitoring) can lead to ischemia and hemodynamic compromise leading to sudden death in these patients as well.
Autonomic Imbalance
Assessment of autonomic function in patients with HCM often reveals abnormal responses of heart rate and blood pressure to exercise in two-thirds, which was associated with a more malignant clinical course, suggesting that autonomic imbalance may also be important in the genesis of sudden cardiac death in these patients.