[Operative risk in repeated heart valve replacement].

Area of Science:

• Cardiovascular Surgery
• Cardiac Valve Disease
• Prosthetic Heart Valves

Context:

• Repeat valve replacement procedures are complex cardiac surgeries.
• Indications for reoperation include prosthesis dysfunction, degeneration, endocarditis, and perivalvular leaks.
• Global hospital mortality for these procedures was 12%.

Purpose:

• To analyze risk factors associated with repeat valve replacement surgery.
• To identify predictors of increased operative risk and mortality.
• To evaluate the impact of indication and timing on reoperation outcomes.

Summary:

• This study reviewed 92 repeat valve replacements in 83 patients. Key reasons for reoperation were perivalvular leak (39%), mechanical prosthesis dysfunction (21%), systemic complications (20%), bioprosthesis degeneration (13%), and endocarditis (7%).
• Increased operative risk was associated with severe preoperative symptoms (Class III/IV), emergency reoperation, and high-risk indications like mechanical prosthesis dysfunction or progressive endocarditis.
• Operative risk is primarily determined by the patient's preoperative cardiac status and the severity of complications, rather than the technical challenges of reoperation itself.

Impact:

• Identifies critical factors influencing mortality in repeat valve replacement, emphasizing patient condition over surgical technique.
• Highlights the importance of timely intervention for chronic valve complications to reduce mortality.
• Underscores the need for preventing acute complications like prosthetic valve thrombosis and endocarditis.