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Ann Thorac Surg 1986;42:269-272
© 1986 The Society of Thoracic Surgeons
Section of Thoracic and Cardiovascular Surgery and the Division of Cardiovascular Diseases and Internal Medicine, Mayo Clinic and Mayo Foundation, Rochester, MN
* Address reprint requests to Dr. King, Mayo Clinic, 200 First St SW, Rochester, MN 55905
Thromboembolism and anticoagulant-related complications secondary to prosthetic aortic valve replacement constitute a significant risk (28% at 5 years). From 1978 through 1984, decalcification of the aortic valve was performed in 8 patients who were undergoing coronary artery revascularization. Preoperative gradients of between 30 and 80 mm Hg (mean, 50 mm Hg) were abolished after operation. To determine the viability of decalcification, the records of 84 additional patients who had undergone this procedure between 1959 and 1978 were reviewed (86% before 1965).
There were 60 male and 32 female patients ranging from 14 to 74 years old (mean, 49 years). The cause of the calcification was a bicuspid valve in 32 patients (35%), senile calcification in 9 (10%), and rheumatic fever in 50 (54%); the cause in 1 patient was unknown. Thirty-day mortality was 13%. Follow-up was 98% complete and ranged from 6 months to 22 years (mean, 7 years).
Aortic valve replacement was subsequently required in 25 patients. Freedom from reoperation at 1, 5, 10, and 15 years was 98%, 75%, 43%, and 26%, respectively, for patients with rheumatic valves compared with 97%, 76%, 57%, and 51%, respectively, for those with bicuspid valves. Survival for patients with rheumatic valves at 1, 5, 10, 15, and 20 years was 93%, 70%, 48%, 40%, and 35%, respectively, compared with 100%, 66%, 57%, 46%, and 46% for patients with bicuspid valves. At follow-up, 61% of the patients were in New York Heart Association Functional Class I or II. Causes of late death were valve related (30%), congestive heart failure (27%), and myocardial infarction (24%). Although not comparable with current mitral reparative procedures, this review represents the earliest attempt at conservative aortic valve procedures in unselected patients. With proper selection, decalcification may be an acceptable alternative to aortic valve replacement in some patients.
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