Pregnancy and bioprostheses: influence on structural valve deterioration

Area of Science:

• Cardiovascular Surgery
• Biomaterials Science
• Reproductive Medicine

Background:

• Bioprosthetic valves are used in young women of childbearing potential.
• Pregnancy may influence the long-term durability of bioprosthetic valves.
• Structural valve deterioration (SVD) is a primary concern for bioprosthetic valve longevity.

Purpose of the Study:

• To evaluate the long-term performance of bioprostheses in women aged 35 or younger.
• To determine the influence of pregnancy on structural valve deterioration (SVD) and reoperation rates.

Main Methods:

• Retrospective analysis of 255 biological prostheses implanted between 1972 and 1992 in 237 female patients.
• Comparison of outcomes between patients who experienced pregnancy (P) and those who did not (nonpregnant [NP]).
• Assessment of valve-related complications, SVD, reoperation rates, and mortality.

Main Results:

• No significant difference in SVD rates (P: 51%, NP: 41%) or valve-related reoperation rates (P: 51%, NP: 40%) between pregnant and non-pregnant groups.
• Late mortality rates were comparable between groups (P: 0.89%/patient-year, NP: 2.71%/patient-year; p=NS).
• The mean interval to reoperation was similar for both groups.

Conclusions:

• Pregnancy does not appear to significantly accelerate structural valve deterioration or increase reoperation rates in young women with bioprosthetic valves.
• Bioprosthetic valve performance is comparable in young women regardless of pregnancy history.
• Further research may explore specific management strategies for pregnant patients with bioprosthetic valves.