title: Tachy-arrhythmias undergoing cardioversion.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000628:therapy*; D001281:Atrial Fibrillation / Q000628:therapy; D004554:Electric Countershock / Q000009:adverse effects; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion