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Chapter 49. Alcohol Septal Ablation in Drug-Refractory Obstructive Hypertrophic Cardiomyopathy

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What are the prevalence of hypertrophic cardiomyopathy (HCM) in the general population and the number of Americans affected?

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A. 1 in 10,000; 35,000 Americans affected

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B. 1 in 5000; 70,000 Americans affected

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C. 1 in 1000; 350,000 Americans affected

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D. 1 in 500; 700,000 Americans affected

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The correct answer is D

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Which statement most accurately characterizes the occurrence of left ventricular outflow tract (LVOT) obstruction (gradient >30 mm Hg) in patients with HCM?

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A. 9 in 10 have resting or provoked obstruction

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B. 6 in 10 have resting or provoked obstruction

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C. 3 in 10 have resting or provoked obstruction

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D. 1 in 10 have resting or provoked obstruction

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The correct answer is B

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What is the most useful method of confirming a diagnosis of HCM?

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A. History

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B. Physical examination

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C. Electrocardiogram

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D. Echocardiogram

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E. Magnetic resonance imaging

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The correct answer is D

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Which statement most accurately characterizes the comparison of surgical myectomy and alcohol septal ablation (ASA) in treatment of patients with drug-refractory symptoms and obstruction?

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A. Higher in-hospital mortality with myectomy; similar 1-year mortality

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B. Similar in-hospital and 1-year mortality

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C. Higher in-hospital and 1-year mortality with ASA

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D. Higher in-hospital and 1-year mortality with myectomy

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The correct answer is B

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Which of the following most accurately describes outcomes of ASA?

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A. Right bundle branch block in a majority

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B. Left bundle branch block in one-third of patients

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C. Transient complete heart block in 70%

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D. Transient complete heart block in 20%

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The correct answer is A

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