First redo heart valve replacement: a 10-year analysis

Area of Science:

• Cardiovascular Surgery
• Biomedical Engineering
• Clinical Outcomes Research

Background:

• The United Kingdom Heart Valve Registry (UKHVR) database contains records of 52,659 heart valve replacements from 1986-1995.
• This study analyzes factors influencing the time to first redo heart valve replacement and the association with redo valve size.

Purpose of the Study:

• To investigate factors affecting the time interval between initial heart valve replacement and the first redo procedure.
• To explore the relationship between prosthesis-induced pathology and the size of the redo heart valve.

Main Methods:

• Retrospective analysis of 43,301 patients undergoing single-site mitral or aortic valve replacement from 1986-1995.
• Valve survival analysis using Cox regression and Kaplan-Meier curves to determine time to first redo operation.
• Regression analysis to identify predictors of redo valve size.

Main Results:

• 2.43% of patients (1051) required a first redo heart valve replacement.
• Female sex and aortic valve replacement were associated with a longer interval to redo surgery.
• Interoperative time influenced redo valve size, particularly for mitral valve replacements.

Conclusions:

• Female patients and those with aortic valve replacements have a longer time to first redo operation compared to males and mitral valve replacements.
• The duration from the initial heart valve replacement significantly impacts the size of the first redo valve.