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Atrial fibrillation in patients with hypertrophic cardiomyopathy

Martin S Maron, MD
Section Editors
Samuel Lévy, MD
William J McKenna, MD
Deputy Editor
Brian C Downey, MD, FACC


Hypertrophic cardiomyopathy (HCM) is a genetically determined heart muscle disease most often (60 to 70 percent) caused by mutations in one of several sarcomere genes that encode components of the contractile apparatus. (See "Genetics of hypertrophic cardiomyopathy".)

HCM is characterized by left ventricular hypertrophy (LVH) of various morphologies, with a wide array of clinical manifestations and hemodynamic abnormalities (figure 1). Depending in part upon the site and extent of cardiac hypertrophy, HCM patients can develop one or more of the following abnormalities:

LV outflow obstruction (see "Types and pathophysiology of obstructive hypertrophic cardiomyopathy")

Diastolic dysfunction

Myocardial ischemia


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Literature review current through: Oct 2015. | This topic last updated: Jun 26, 2015.
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