Long-term results for aortic valve replacement with small aortic annulus

Area of Science:

• Cardiovascular Surgery
• Biomedical Engineering
• Clinical Outcomes Research

Background:

• Aortic valve replacement (AVR) is a common procedure for aortic stenosis.
• Prosthesis-aortic size mismatch can impact hemodynamic function and patient outcomes.
• The long-term effects of small aortic prosthesis size require further investigation.

Purpose of the Study:

• To evaluate the influence of aortic prosthesis size on survival and hemodynamic function after AVR.
• To compare outcomes between patients with small internal orifice area index (IOAI) and a control group.

Main Methods:

• Retrospective analysis of 89 patients undergoing AVR.
• Group definition based on internal orifice area index (IOAI): small IOAI (<=1.3 cm(2)/m(2)) vs. control (>1.3 cm(2)/m(2)).
• Assessment of actuarial survival, freedom from valve-related impairment, pressure gradients, and left ventricular mass index at 10 years.

Main Results:

• No significant difference in 10-year survival (74.5% vs. 75%) or freedom from valve-related impairment (87% vs. 85%) between groups.
• Significantly higher postoperative pressure gradients in the small IOAI group (p < 0.05).
• Left ventricular mass index decreased in both groups, but significantly only in the control group.

Conclusions:

• Long-term results of AVR in patients with small aortic annuli are satisfactory regarding survival and valve-related impairment.
• Small aortic prosthesis size is associated with elevated postoperative pressure gradients and persistent left ventricular hypertrophy.
• Careful prosthesis selection is crucial to optimize hemodynamic function and reduce long-term complications.