[Reoperations of myocardial revascularization]. / Reoperaciones de revascularización miocárdica.

UNLABELLED: Coronary by-pass grafting is a well established procedure for ameliorating ischemic coronary disease. From time to time it is necessary to re-operate these patients. The objective of our paper is to present our experience in this field. Retrospective analysis of 128 patients operated on between February 1978 and November 1996, has been analyzed. The mean age was 57.4 +/- 0.7 years. 77.2 +/- 5 months elapsed between operations. Stable angina (20.4%) or unstable angina (76.3%), myocardial infarction (48%) and congestive heart failure (17%) were the predominant clinical manifestations. RESULTS: Hospital mortality was 10.9% (14 patients) and in the follow-up there were 16 deaths (14%). Perioperative myocardial infarction was the main cause of in-hospital mortality. In the follow-up there were 4 deaths due to myocardial infarction and another 4 patients died from neoplasms. Perioperative myocardial infarction was present in 9.3% (12 patients) IN CONCLUSION: a) Re-do coronary by-pass grafting is still a good procedure for solving myocardial ischemia in spite of a higher mortality and morbidity than in the original operation. b) There is no progression in the number of patients according to our experience, probably due to better techniques and the frequent actions by an intervention cardiologist. c) The long-term results are good enough, but with a higher mortality.

Blood biochemistry values of sheep (Ovis aries ligeriensis).

1. Analysis of biochemical parameters were carried out on material pooled from 30 female sheep (Ovis aries ligeriensis). 2. The values determined were for the common metabolites and enzymes utilized for specific studies in general metabolism (urea, glucose, cholesterol, lipids, bilirubin, uric acid, creatinine, alkaline phosphatase, GOT, GPT, LDH, LAP, CGT, CK and amylase). 3. Results of these studies were compared with values from normal human adults. 4. The differences obtained in human and sheep ranges can be explained by the different physiology of the two species. 5. This study gives values for the sheep as an experimental animal in biomedical research.