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Ann Thorac Surg 2002;74:1517-1525
© 2002 The Society of Thoracic Surgeons

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Original article: cardiovascular

Coronary bypass surgery in women: a long-term comparative study of quality of life after bilateral internal mammary artery grafting in men and women

^a Miami Heart Research Institute, Mount Sinai Medical Center, Miami Beach, Florida, USA

Accepted for publication April 21, 2002.

* Address reprint requests to Dr Kurlansky, Miami Heart Research Institute, 801 Arthur Godfrey Rd, 5th Floor, Miami Beach, FL 33140, USA
e-mail: doctorwul8{at}aol.com

Background. Coronary bypass surgery carries a higher operative mortality and less favorable long-term clinical benefits for women than men. The impact of arterial revascularization on long-term results, including quality of life (QOL) in women, compared with men, has not been clearly defined.

Methods. A retrospective analysis was performed comparing 261 consecutive women patients from a single surgical practice receiving bilateral internal mammary artery (IMA) and supplemental vein grafts between January 1972 and October 1994 with a computer-matched cohort of 261 men undergoing bilateral IMA surgery during the same time period. Univariate analysis confirmed the homogeneity of the two groups based on multiple preoperative variables. The SF-36 QOL assessment tool was completed for all patients at follow-up, which ranged from 1 month to 25 years, with a mean follow-up of 9.1 years for women and 8.6 years for men.

Results. There was no significant difference in operative mortality, nor in the incidence of any of 10 postoperative complications evaluated. The actuarial survival at 15 years was 53.7% ± 4.8% for women and 50.9% ± 5.6% for men (p = 0.218). At follow-up, 97.0% of women and 94.3% of men were free of angina and in Canadian Cardiovascular Society (CCS) class I or II. The need for reoperation (1.8% vs 1.9%) and PTCA (4.8% vs. 3.2%) was comparable in both groups. However, a higher rate of late myocardial infarction was found in women than men (1.8% vs 0.6, p = 0.021). The long-term event-free survival was found to be no different in men than women (p = 0.084). QOL as measured by the SF-36 was compared with the general population corrected for age and gender. Men and women scored as well or better than the general population in a majority of the eight health scales. Moreover, with regard to the health summary scores, men scored significantly higher (p = 0.001) in physical health, whereas women scored significantly higher (p = 0.011) in mental health when compared with age-adjusted norms.

Conclusions. Men and women undergoing coronary revascularization using bilateral internal mammary artery conduits experience comparable outcomes, excellent long-term results, and enjoy a QOL comparable to or better than the general population as measured by the SF-36.

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