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Ann Thorac Surg 2006;82:524-529
© 2006 The Society of Thoracic Surgeons

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Original article: Cardiovascular

Surgical Management of Infective Endocarditis: Early Predictors of Short-Term Morbidity and Mortality

^a Cardiac Ultrasound Laboratory, Cardiology Division, Department of Medicine, Boston, Massachusetts
^b Cardiac Surgery Division, Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts

Accepted for publication February 6, 2006.

^_* Address correspondence to Dr Jassal, Department of Cardiology, Cardiac Ultrasound Laboratory, Massachusetts General Hospital, Harvard Medical School, VBK-508, 55 Fruit Street, Boston, MA 02114 (Email: djassal{at}partners.org).

BACKGROUND: Infective endocarditis is a diagnostic and therapeutic challenge that ultimately requires surgical intervention in 20% of all cases. Early determinants of morbidity and mortality in this high risk population are not well described.

METHODS: The aim of this study was to determine preoperative clinical, microbiological, electrocardiographic, and echocardiographic variables that predicted the need for permanent pacemaker implantation and in-hospital death in a surgical cohort of patients with active infective endocarditis.

RESULTS: We identified 91 patients (61 males and 30 females, mean age 58 ± 16 years) who underwent surgical intervention for active culture-positive infective endocarditis as defined by the Duke criteria. Native valve infective endocarditis was present in 78 (85.7%) and prosthetic valve endocarditis in 13 (14.3%) of cases. The aortic valve was infected in 61 (67.0%), the mitral in 35 (38.5%), and multiple valves in 8 patients (8.8%). The most common indication for surgical intervention was intractable heart failure. Twenty-two patients (24.2%) required pacemakers, while there were 14 (15.4%) in-hospital deaths. In age-adjusted and gender-adjusted analyses, the presence of left bundle branch block on preoperative electrocardiogram (ECG) and presence of depressed left ventricular systolic function (ejection fraction [EF] < 50%) predicted the need for a permanent pacemaker implantation, while the presence of depressed left ventricular function predicted in-hospital mortality.

CONCLUSIONS: Preoperative ECG findings of left bundle branch block and reduced left ventricular function may allow for early risk stratification of this high risk population.

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