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Neal W. Salomon
Edward B. Stinson
Randall B. Griepp
Norman E. Shumway
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Ann Thorac Surg 1977;24:519-530
© 1977 The Society of Thoracic Surgeons

Articles

Patient-Related Risk Factors as Predictors of Results Following Isolated Mitral Valve Replacement

Neal W. Salomon, M.D., Edward B. Stinson, M.D.*, Randall B. Griepp, M.D., Norman E. Shumway, M.D.

Department of Cardiovascular Surgery, Stanford University School of Medicine, Stanford CA.

* Address reprint requests to Dr. Stinson, Department of Cardiovascular Surgery, Stanford University Medical Center, Stanford, CA 94305

Results following isolated mitral valve replacement in 897 consecutive patients over a twelve-year period were analyzed with regard to the influence of various preoperative patient-related risk factors. Actuarial data analysis allowed definition of major preoperative, etiological, clinical, and hemodynamic correlates to both perioperative and long-term postoperative patient survival. Patient age below 60 years, preoperative New York Heart Association Functional Class of III or less, cardiac index greater than 2.0, and left ventricular end-diastolic pressure of less than 12 mm Hg were all highly significant correlates of improved perioperative as well as long-term patient survival.

Patients whose predominant functional lesion was mitral insufficiency had only a 53% five-year survival (187 of 352 patients) following mitral valve replacement as opposed to 70% (521 of 745 patients) for those who had mixed or stenotic mitral lesions. Primary ischemic mitral dysfunction was associated with only 31% five-year survival (17 of 54 patients) after mitral valve replacement in contrast to 69% (480 of 695 patients) for patients with rheumatic mitral lesions. The presence of occlusive coronary artery disease coexisting with, but not the primary cause of, mitral dysfunction was associated with decreased perioperative and late postoperative survival.

Results support both earlier operative intervention and wider use of associated procedures, ie, coronary bypass grafting, with mitral valve replacement. Recognition of major preoperative patient-related risk factors should enhance survival following this procedure.




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