Potential candidates for pacemakers. Survey of heart block and sinoatrial disorder (sick sinus syndrome).
D000328:Adult; D000368:Aged; D001146:Arrhythmia, Sinus / Q000453:epidemiology; D002309:Cardiology / Q000639:trends; D004739:England; D005260:Female; D006327:Heart Block / Q000453:epidemiology* / Q000628:therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000706:statistics & numerical data*; D013577:Syndrome