Immediate and long-term results in aortic valve replacement.

Area of Science:

• Cardiovascular Surgery
• Cardiac Surgery Outcomes
• Aortic Valve Disease Management

Background:

• Isolated aortic valve disease necessitates surgical intervention.
• Valve replacement surgery has evolved over decades.
• Assessing long-term outcomes is crucial for patient management.

Purpose of the Study:

• To evaluate the long-term results of aortic valve replacement surgery.
• To determine the impact of myocardial protection strategies on perioperative mortality.
• To analyze factors influencing patient outcomes, including NYHA functional class and prosthesis type.

Main Methods:

• Retrospective analysis of 127 patients undergoing isolated aortic valve replacement.
• Comparison of outcomes between patients operated on during two distinct periods (1967-1974 and later).
• Assessment of perioperative mortality based on myocardial protection methods (normothermia vs. chemical cardioplegia).

Main Results:

• Perioperative mortality was significantly lower with chemical cardioplegia (6%) compared to normothermia (18%).
• No significant correlation was observed between preoperative NYHA functional class and mortality or complication rates.
• Long-term patient outcomes were not significantly influenced by the type of valvular prosthesis used.

Conclusions:

• The choice of myocardial protection strategy is a critical determinant of perioperative mortality in aortic valve replacement.
• Early and late outcomes of aortic valve replacement are influenced by surgical techniques and patient factors.
• Chemical cardioplegia represents a superior method for myocardial protection during aortic valve surgery, reducing mortality risk.