PubMed Health⌕ Search

Biomedical subjects

F D Loop

Publications and source records attributed to F D Loop.

At least 199 records · Page 11Linked to original sources
PubMed1975

Selection of the candidate for myocardial revascularization; a profile of high risk based on multivariate analysis.

A survey of 60 patients who died from cardiac related causes after vein or artery bypass operations alone (1967 to 1973) was made with respect to 26 clinical, angiographic, and operative variables. These factors were compared with identical characteristics of 1,188 survivors operated upon in 1973. Through discriminant analysis, the various characteristics, isolated or multiple in any combination, have been converted into risk related to operative death. The distinctive features of the mortality group were vastly different from those in the surviving group. Ten patients (16.67 per cent) of the mortality group were in the ninety-ninth percentile of risk, whereas these factors or variables of similar weight produced an equivalent risk of only 0.34 per cent of the survivors; thus, operative death in these circumstances could be predicted with an estimated 98.0 per cent assurance. Each of 6 patients with mortality risks above 0.99999 had (1) marked cardimegaly, (2) uncompensated congestive heart failure (CHF), (3) triple vessel coronary artery disease and/or obstruction of the left main coronary artery, (4) generalized impairment of left ventricular contraction or segmental left ventricular scar, and (5) evelated left ventricular end-diastolic pressure. As a single factor, congestive heart failure (CHF) exerted the most influence on the probability of dying. A new and more desctiptive statistical interpretation of the factors presumed to affect risk is presented.

Age Factors↗
PubMed1975

Rupture of the posterior wall of the left ventricle after mitral valve replacement.

Rupture of the posterior wall of the left ventricle is an unusual but often lethal complication following mitral valve replacement (MVR). We have encountered it six times with a 100 per cent mortality rate in a series of 1,154 operations for MVR. Sites of rupture were located at the base of the resected papilary muscle or close to the artioventricular groove in the area adjacent to the resected posterior mitral leaflet. T stongly indicates the overzealous resection of the mitral leaflets and papillary muscle as an important eitiologic factor. Other possible etiologic factors are discussed and important pitfalls to be avoided during MVR are stressed.

Aged↗
PubMed1975

The spectrum of exercise test and angiographic correlations in myocardial revascularization surgery.

Maximal exercise tests and angiographic evaluations were obtained in a group of patients before and after myocardial revascularization. Patients were classified on the basis of angiography and operative records. Two primary groups of 33 patients with complete revascularization and 95 patients with postoperative residual ischemia were studied. The residual ischemia subgroups included patients with partial revascularization, progressive coronary atherosclerosis, or graft failure. Patients with complete revascularization had statistically significant improvements in work capacity, maximal heart rate, maximal rate-pressure products, abnormal exercise electrocardiograms, exercise-induced angina pectoris, and atrial gallop sounds. A spectrum of lesser improvements in these measurements was observed in the subgroups with residual ischemia. Total graft failure resulted in no significant improvements in exercise-test parameters. Maximal stress tests provide a useful adjunct to routine clinical follow-up of myocardial revascularization patients. Myocardial revascularization is associated with significant patient palliation as determined by serial stress testing.

Angina Pectoris↗
PubMed1975

Aorta-coronary bypass grafting with the internal mammary artery: clinical experience in 70 patients.

Clincal and angiographic results in 70 patients who received free internal mammary artery (IMA) grafts are reviewed. One postoperative death occurred, but it was not related to the free IMA technique. Forty-seven patients underwent postoperative arteriography. The average interval between operation and catheterization was 10.7 months, and the patency rate for 49 free IMA grafts was 89.8 per cent. Of the 29 patients who recieved free IMA grafts as the only revascularization procedure, 21 patients (80 per cent) progressed to Functional Class I and only 5 patients did not have improvement in their functional status.

Angiocardiography↗