Regional ejection fractions in patients with patent and thrombosed grafts after coronary artery vein bypass surgery.
Twenty-six patients who had received 43 grafts were studied before and after coronary artery vein bypass surgery. Cine ventriculograms taken in the right anterior oblique projection were analyzed and regional ejection fractions calculated. Single and multiple grafts were considered separately as were thrombosed and patent grafts. Patients were also divided into those with regional ejection fractions below 50% and those with regional ejection fractions above 50%. No statistically significant improvement of the relevant segments was demonstrated in any group. However, those with a regional ejection fraction above 50%, whose grafts had thrombosed, deteriorated from a mean of .66 to .39. There is a significant trend here (p less than .05) and a t test significance at the 7% level.
D002932:Cineangiography; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D008297:Male; D009200:Myocardial Contraction