Very late survival after vascular surgery

Area of Science:

• Cardiovascular Surgery
• Vascular Surgery
• Geriatric Cardiology

Background:

• Preoperative assessment of left ventricular function is crucial for patients undergoing major vascular surgery.
• Radionuclide ventriculography (RNVG) provides objective measures of left ventricular ejection fraction (EF) and wall motion abnormalities.
• Understanding very late survival patterns is essential for optimizing patient care and outcomes.

Purpose of the Study:

• To define very late survival in veterans undergoing elective major vascular surgery.
• To identify predictors of long-term mortality after major vascular procedures.
• To assess the impact of preoperative left ventricular function on survival.

Main Methods:

• Retrospective cohort study of 310 veterans undergoing major vascular surgery between 1984 and 1988.
• Preoperative left ventricular function assessed using radionuclide ventriculography (RNVG).
• Long-term follow-up via direct contact, VA databases, and the Social Security Death Index.

Main Results:

• Mean follow-up was 6.64 years, with survival rates varying by surgery type (e.g., 10% after carotid surgery, 12% after aortic aneurysm repair).
• Low ejection fraction (EF < 50%) was independently associated with overall mortality (mean survival 4.78 years vs. 7.99 years with normal EF).
• Diabetes, active smoking, and severe left ventricular dysfunction (EF ≤ 35%) were linked to mortality; prior myocardial infarction and angina were not significant predictors.

Conclusions:

• Very late survival after major vascular surgery is influenced by diabetes, smoking status, left ventricular function, and postoperative cardiac complications.
• Preoperative left ventricular dysfunction is a significant predictor of long-term mortality.
• Routine coronary evaluation may not be necessary for all patients, as angina and prior MI did not predict very late survival.