Figure 1.

Screening imaging studies. A, B: Left ventricular hypertrophy (interventricular septum / posterior wall = 17 / 16 mm) with a normal left ventricular ejection fraction (= 57%) on transthoracic echocardiogram. C: Apical sparing pattern of the left ventricular global longitudinal strain, a typical finding in cardiac amyloidosis. D:^99mTc-hydroxymethylene diphosphonate scintigraphy shows no tracer accumulation to the heart (grade 0). E: Complete atrioventricular block with complete right bundle branch block and left axis deviation on 12-lead electrocardiogram.