Predictors of long-term survival after percutaneous aortic valvuloplasty: report of the Mansfield Scientific Balloon Aortic Valvuloplasty Registry

Department of Internal Medicine, William Beaumont Hospital, Royal Oak, Michigan 48072.

Percutaneous balloon aortic valvuloplasty was used to prospectively treat 492 elderly, symptomatic, nonsurgical patients suffering from severe aortic stenosis in 27 centers in North America and Europe. At 1 year the overall survival rate was 64% and the event-free survival rate (survival free of valve replacement or repeat valvuloplasty) was 43%. Clinical, catheterization and procedural variables were assessed to define prognostic variables. Univariate analysis revealed that patients who survived had a lesser frequency of previous myocardial infarction (2% versus 6%, p less than 0.005), lower incidence of severe ventricular dysfunction (22% versus 48%, p less than 0.001) and lower incidence of symptoms of heart failure (60% versus 75%, p less than 0.02). History of angina (56% versus 45%, p = NS) and syncope (23% versus 16%, p = NS) were similar for both groups. Values obtained at cardiac catheterization that differed in survivors and nonsurvivors included lower pulmonary artery systolic pressure (43 +/- 1 versus 54 +/- 2 mm Hg, p less than 0.001), lower mean pulmonary artery pressure (28 +/- 1.0 versus 36 +/- 1.0 mm Hg, p less than 0.001) and larger initial valve area (0.52 +/- 0.01 versus 0.47 +/- 0.02 cm2, p = 0.006). Discriminate function analysis was performed to identify variables that independently predicted improved probability of survival. Eight variables were significantly and independently predictive. These included age, initial cardiac output, initial left ventricular systolic pressures, initial left ventricular end-diastolic pressures, presence of coronary artery disease, New York Heart Association dyspnea classification, number of balloon inflations and final valve area.(ABSTRACT TRUNCATED AT 250 WORDS)

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