Coronary bypass surgery for unstable angina pectoris. Long-term survival and function

Area of Science:

• Cardiovascular Surgery
• Cardiac Surgery Outcomes
• Atherosclerosis Research

Background:

• Unstable angina pectoris poses significant risks for patients.
• Coronary artery bypass surgery (CABG) is a key intervention for severe coronary artery disease.
• Long-term outcomes of CABG for unstable angina require continued evaluation.

Purpose of the Study:

• To assess the long-term efficacy and safety of coronary artery bypass surgery for unstable angina.
• To evaluate patient survival, symptom relief, and incidence of major adverse cardiac events post-CABG.
• To identify potential factors contributing to late adverse outcomes.

Main Methods:

• Retrospective observational study of 81 patients undergoing CABG for unstable angina.
• Mean follow-up duration of 40.8 months.
• Data collection included surgical mortality, perioperative myocardial infarction, symptom status, and survival probability.

Main Results:

• Surgical mortality was 8.5%; perioperative myocardial infarction occurred in 16% of patients.
• At 40.8 months, 51% had complete angina relief, while 22% experienced worsening angina.
• Survival probability was 88.8% at 4 months, decreasing to 83.8% at 43 months due to late cardiac deaths.

Conclusions:

• Coronary artery bypass surgery provides substantial long-term benefits for unstable angina patients, including symptom relief and survival.
• Late cardiac deaths and persistent/worsening angina suggest potential progression of atherosclerosis or graft failure.
• Further investigation into late graft occlusion and disease progression is warranted.