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[Morphological and histomorphometric characterization of the myocardium in patients with aorto-coronary venous
1Institut für Pathologie der Medizinischen Fakultät, (CHarité), Humboldt-Universität zu Berlin, BRD.
Insights
Autopsy hearts from bypass patients revealed bypass obstruction by thrombi in nearly 50% of infarction deaths. Severe cardiac damage, including arteriosclerosis and increased connective tissue, adversely impacted survival.
Area of Science:
- Cardiovascular Pathology
- Cardiac Surgery Outcomes
Context:
- Investigated autopsy hearts from 29 patients who underwent aorto-coronary venous bypass surgery.
- Analysis focused on causes of death and cardiac morphology post-bypass.
Purpose:
- To correlate morphological and histomorphometric findings with outcomes in bypass patients.
- To identify factors contributing to mortality and adverse cardiac events after bypass surgery.
Summary:
- Nearly 50% of deaths due to infarction showed bypass obstruction by thrombi.
- Average heart weight correlated with left-ventricular myocardial cell diameter but not chronic hypertrophy.
- Stenotic coronary arteriosclerosis and increased myocardial connective tissue were prevalent.
Impact:
- Severe cardiac damage, including arteriosclerosis and increased myocardial connective tissue, significantly worsened postoperative survival.
- Findings highlight the critical role of bypass patency and myocardial health in long-term patient outcomes.
Abstract:
Morphological and histomorphometric investigations were performed in 29 autopsy hearts from patients with aorto-coronary venous bypass. 14 of them (48%) had died of acute myocardial infarction or re-infarction and 9 (31%) of postoperative cardiac failure. Bypasses had been obstructed by thrombi in nearly 50% of those who died of infarction. Average heart weight of 548 +/- 128 g was found to be correlated with the left-ventricular myocardial cell diameter, but it did not reflect the extent of hypertrophy in chronically insufficient hearts. Stenotic coronary arteriosclerosis and increase in left-ventricular connective tissue in the myocardium to a level of 19.5 +/- 6.0 vol. % completed the pattern of severest cardiac damage and were of substantially adverse impact upon postoperative survival of patients thus affected.