Related Experiment Videos
Myocardial revascularization in patients with poor ventricular function
Insights
Patients with impaired ventricular function undergoing bypass surgery have high operative mortality with complete repair but similar long-term outcomes. Individual assessment is crucial for treatment decisions.
Area of Science:
- Cardiology
- Cardiac Surgery
- Medical Diagnostics
Background:
- Impaired ventricular function poses significant risks for patients undergoing cardiac procedures.
- Ejection fraction is a key metric for assessing ventricular condition.
- Coronary artery disease often necessitates bypass surgery.
Purpose of the Study:
- To evaluate the impact of bypass surgery on patients with impaired ventricular function.
- To compare outcomes between complete and incomplete revascularization in this high-risk group.
- To determine the influence of ventricular ejection fraction on surgical results.
Main Methods:
- Review of 80 patients with impaired ventricular function assessed by ventriculography.
- Classification of patients into groups based on ejection fraction (<0.2, 0.2-0.4, 0.4-0.6).
- Analysis of vessel suitability for bypass and collateral circulation from cinearteriograms.
Main Results:
- Operative mortality was 7% for complete repair versus 30% for incomplete repair.
- Late mortality did not significantly differ; 75% with complete repair and 65% with incomplete repair showed clinical improvement.
- Collateral circulation and vessel suitability were considered potential influencing factors.
Conclusions:
- Patients with impaired ventricular contractility are high-risk surgical candidates.
- Complete bypass repair in this cohort has a high operative mortality but does not improve long-term outcomes compared to incomplete repair.
- Individualized patient evaluation is essential for determining suitability for bypass surgery, avoiding categorical denial of treatment.
Abstract:
Eighty patients with evidence of impaired ventricular function by ventriculography were reviewed. On the basis of the ejection fraction, these patients were divided into three groups. Those with ejection fractions less than 0.2 were considered in very poor condition, those with ejection fractions of 0.2 to 0.4 were considered in poor condition, and those with ejection fractions with between 0.4 and 0.6 were considered fair. Suitability of vessels for bypassing and the presence or absence of collateral cirulation on the cinearteriograms was also noted for possible influence on result. Operative mortality rate in patients having complete repair, defined as bypassing all major vessels with significant obstruction, was 7 per cent. In 26 patients having incomplete repair, the operative mortality was 30 per cent. However, the late mortality rate was not favorably influenced by complete repair, 75 per cent are in improved or good clinical condition, as compared with 65 per cent in the incomplete repair group. As patients with impairment of ventricular contractility are at high risk, it is believed that they should continue to be evaluated on an individual basis for bypass surgery and not categorically denied treatment.