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Left ventricular aneurysmectomy; comparison between two techniques; early and late results
Summary
Endoventricular patch plasty offers better outcomes for left ventricular aneurysm repair compared to conventional aneurysmectomy. This technique, combined with complete myocardial revascularization, improves patient geometry and long-term results.
Area of Science:
- Cardiovascular Surgery
- Cardiac Surgery
- Thoracic Surgery
Background:
- Postinfarction left ventricular aneurysms pose significant surgical challenges.
- Conventional aneurysmectomy and direct closure have been standard treatments.
- Evaluating alternative techniques is crucial for improving patient outcomes.
Purpose of the Study:
- To compare the early and late results of conventional aneurysmectomy versus endoventricular patch plasty for left ventricular aneurysm repair.
- To assess the impact of surgical techniques on patient mortality, morbidity, and cardiac function.
- To determine the optimal surgical approach for reconstructing left ventricular geometry.
Main Methods:
- Retrospective review of 118 patients with postinfarction left ventricular aneurysms (1981-1994).
- Group A (n=87): Conventional aneurysmectomy; Group B (n=31): Endoventricular patch plasty.
- Analysis of preoperative, operative, early postoperative, and late clinical/echocardiographic outcomes (mean follow-up: 42 months for Group A, 28 months for Group B).
Main Results:
- Group B showed significantly higher rates of coronary artery revascularization (left anterior descending: 89.7% vs 34.6%; left internal mammary artery: 82.8% vs 8.9%).
- Hospital mortality was zero in Group B versus 10.3% in Group A (P > 0.05).
- Low cardiac output syndrome occurred in 9.7% of Group B patients versus 36.8% in Group A (P = 0.01). Late follow-up revealed superior improvements in NYHA/CCS classes and ejection fraction in Group B, with significant improvement in left ventricular end-diastolic diameter (P < 0.001).
Conclusions:
- Endoventricular patch plasty, when combined with complete myocardial revascularization (especially of the LAD) and increased use of the internal mammary artery, leads to better patient outcomes.
- Reconstruction of left ventricular geometry via endoventricular patch plasty is associated with improved long-term results.
- This technique offers a superior approach for patients undergoing left ventricular aneurysmectomy.