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

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

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

B. 1 in 5000; 70,000 Americans affected

C. 1 in 1000; 350,000 Americans affected

D. 1 in 500; 700,000 Americans affected

The correct answer is D

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

A. 9 in 10 have resting or provoked obstruction

B. 6 in 10 have resting or provoked obstruction

C. 3 in 10 have resting or provoked obstruction

D. 1 in 10 have resting or provoked obstruction

The correct answer is B

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

A. History

B. Physical examination

C. Electrocardiogram

D. Echocardiogram

E. Magnetic resonance imaging

The correct answer is D

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?

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

B. Similar in-hospital and 1-year mortality

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

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

The correct answer is B

Which of the following most accurately describes outcomes of ASA?

A. Right bundle branch block in a majority

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

C. Transient complete heart block in 70%

D. Transient complete heart block in 20%

The correct answer is A

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