PMID: 6979438Aug 1, 1982Paper

Dimensional characteristics of left ventricular function after coronary artery bypass grafting

Circulation
G S TysonJ S Rankin

Abstract

During coronary artery bypass grafting, 20 patients underwent epicardial placement of miniature ultrasonic dimension transducers across the minor-axis diameter of the left ventricle to monitor cardiac function postoperatively. Left atrial or left ventricular pressure was measured in all patients, and thermodilution cardiac outputs were obtained routinely. Data from 1, 6, 12 and 20 hours postoperatively were analyzed. Directional changes in systolic shortening of the left ventricular diameter correlated well with stroke volume measured by thermodilution techniques and could be used as an on-line index of cardiac output. In five patients who had preoperative abnormalities in wall motion, systolic bulging of the minor-axis diameter was seen initially after revascularization and then gradually resolved over the next 12 hours. Systolic bulging that did not resolve was the earliest indication of a perioperative myocardial infarction in another patient. The end-diastolic diameter increased progressively in all patients in the first 12 hours postoperatively and was associated with stabilization of cardiac function. This improvement in diastolic left ventricular filling was not reflected (p greater than 0.2) by changes in mean left atri...Continue Reading

Related Concepts

Related Feeds

Cardiology Journals

Discover the latest cardiology research in this collection of the top cardiology journals.

Absence Epilepsy

Absence epilepsy is a common seizure disorder in children which can produce chronic psychosocial sequelae. Discover the latest research on absence epilepsies here.