In 8 patients with complete heart block, cardiac and hemuodynammic functions were determined by methods based on cardiac catheterization. The data characterize the impairment in these functions in asymptomatic subjects and indicate, in addition, the further changes over the course of several years in the same subject, the deleterious effects associated with congestive heart failure, and the cha...

INTRODUCTION In some patients with recurrent syncope, the etiology may remain unclear despite extensive evaluation. These patients may sometimes be labeled as having a "psychogenic" cause for their syncope. METHODS We report on three patients with recurrent unexplained syncope (despite extensive evaluation) who were labeled as having a psychogenic cause for their events. In each patient follo...

Introduction Complete heart block rarely occurs in patients o50 years of age and is less common during pregnancy. It is important to establish that symptoms are related to the heart block, and the management of the condition may be challenging. We present a case of symptomatic complete heart block developing during pregnancy and a treatment strategy minimizing fetal exposure to ionizing radiation.

THE PRESENCE of complete heart block offers a good opportunity to study cardiovascular functions, since one of the major variables of cardiac activity, i.e., heart rate, is maintained constant.113 In addition, if a cardiac pacemaker is implanted in a heart for treatment of complete heart block,14-20 total control of the cardiac rate is achieved, thereby providing an excellent opportunity for st...