Syncope and cerebral dysfunction caused by bradycardia without atrioventricular block.

摘要: Abstract In this paper six patients, aged 50 to 74 years, with chronic symptomatic sinoatrial bradycardia are described; none had more than first degree A-V block. The cause of the was not evident except in one, who coronary artery disease myocardial infarction. Five patients suffered from syncopal attacks, which 3 were documented be related cardiac slowing or arrest. One patient evidence effort fatigue, and another symptoms impaired cerebral peripheral circulation. Electronic pacing effective improving output relieving symptoms. Chronic is much less common block as a cardiogenic syncope but must considered differential diagnosis fainting.