Limitations of the Lown grading system for study of human ventricular arrhythmias.
D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000145:classification* / Q000209:etiology; D005260:Female; D006352:Heart Ventricles; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications; D013614:Tachycardia, Paroxysmal / Q000145:classification / Q000209:etiology