Mediastinitis after cardiac valve operations. Impact upon survival

Area of Science:

• Cardiovascular Surgery
• Infectious Diseases
• Surgical Outcomes

Background:

• Mediastinitis is a severe complication after cardiac valve replacement, associated with high mortality rates.
• The incidence of mediastinitis after cardiac valve operations is approximately 1.4%.

Purpose of the Study:

• To evaluate the impact of mediastinitis on mortality after cardiac valve operations.
• To assess the effectiveness of different treatment strategies for mediastinitis.

Main Methods:

• Retrospective review of 2,491 patients undergoing cardiac valve operations over 10 years.
• Analysis of mediastinitis incidence, associated risk factors, and treatment outcomes.
• Comparison of outcomes before and after 1980, with a focus on debridement, irrigation, and muscle flap closure.

Main Results:

• Mediastinitis developed in 36 patients (1.4%), with 12 having independent high-risk factors leading to an 83.3% mortality.
• In patients without high-risk factors, early treatment with debridement and irrigation (before 1980) resulted in a 25% mortality.
• Post-1980, using muscle flaps (11/16 patients) significantly reduced infection-to-discharge time and led to a 94% survival rate in 16 patients.

Conclusions:

• Mediastinitis after cardiac valve operations can be successfully managed, especially in patients without other significant perioperative problems.
• Early surgical intervention, including debridement and muscle flap reconstruction, is crucial for improving survival rates.
• The study highlights the improved outcomes with modern surgical techniques for mediastinitis post-cardiac valve surgery.