Long-term follow-up after open-heart valve surgery

Area of Science:

• Cardiovascular Surgery
• Cardiac Valve Repair
• Medical Outcomes Research

Background:

• Review of long-term outcomes for open-heart valve surgery performed between 1959 and 1974 in Uppsala.
• Analysis of 677 patients with a mean follow-up of 10 years (range 5-22 years).

Purpose of the Study:

• To evaluate the long-term results, complications, survival rates, and functional status after open-heart valve surgery.
• To assess the durability of early mechanical and biologic valves used during the study period.

Main Methods:

• Retrospective review of patient records from Uppsala.
• Calculation of operative mortality, long-term complication rates (embolism), reoperation frequency, and actuarial survival.
• Follow-up investigation of 244 survivors to assess functional improvement and late complications.

Main Results:

• Operative mortality decreased from high initial rates to 11-12% by the end of the period.
• The main long-term complication was embolism; late reoperation rates were 10-20% due to valve durability issues.
• Actuarial 10-year survival was approximately 50%, with similar rates for aortic and mitral valve disease. Predominant late deaths (60-75%) were cardiac-related.
• Significant functional improvement was observed in survivors; 6-8% required reoperation for valvular insufficiency.

Conclusions:

• Open-heart valve surgery outcomes improved over the study period, but long-term complications like embolism and valve failure necessitated reoperation in a significant proportion of patients.
• Cardiac causes, including myocardial and valve-related issues, were the primary drivers of late mortality.
• Despite challenges with early valve technology, survivors generally experienced substantial functional recovery.