INTRODUCTION The purpose of this study was to perform a quantitative fluoroscopic analysis of the coronary sinus ostium and its relationship to the His bundle in patients with and without AV nodal reentrant tachycardia. Sites of slow pathway ablation are often near the coronary sinus ostium, which can be located within a few millimeters of the His bundle. Whether such close proximity of the cor...

A 50-year-old man suffering from recurrent chest pain accompanied by transient ST-segment elevation developed spasm of the left anterior descending coronary artery after receiving ergonovine maleate. During spontaneous chest pain, thermodilution coronary sinus blood flow fell from 96 ml/min to 46 ml/min, while the coronary sinsu arteriovenous oxygen difference widened from 9.82 volumes percent ...

Case report An 80-year-old man with an implanted resynchronization therapy pacemaker device was referred to our institution in October 2011 to perform a transvenous lead and generator removal for a severe pocket infection. As left ventricular pacing lead, an unipolar activefixation coronary sinus (CS) lead (Attain StarFix 4195OTW,Medtronic Inc.), positioned in a lateral coronary vein, had been ...

The effect of sympathetic alpha-receptor coronary vasoconstriction on myocardial oxygen tension was studied in open- and closed-chest, chloralose-anesthetized dogs. Blood oxygen tension in the coronary sinus and blood flow in the circumflex coronary artery were continuously measured in a three-part experiment. With stimulation of the left stellate ganglion (15 Hz, 3 msec, 4-7 v, 90-second train...

1. Anomalies of origination and course • Absent left main trunk, • Anomalous location of coronary ostium within aortic root or near proper aortic sinus of Valsalva (for each artery) • Anomalous location of coronary ostium outside normal "coronary" aortic sinuses • Anomalous location of coronary ostium at improper sinus (which may involve joint origination or "single" coronary pattern) • Single ...

BACKGROUND Electric alternans is a pattern of variation in the shape of ECG waveform that occurs every other beat. In humans, alternation in ventricular repolarization, known as repolarization alternans (RA), has been associated with increased vulnerability to ventricular tachycardia/fibrillation and sudden cardiac death. METHODS AND RESULTS This study investigates the spatio-temporal variabi...