Nonvolumetric echocardiographic indices of right ventricular systolic function: validation with cardiovascular magnetic resonance and relationship with functional capacity

摘要: Purpose: Right ventricular (RV) systolic function as measured by right ejection fraction (RVEF) has long been recognized an important predictor of outcome in heart failure patients. The echocardiographic measurement RV volumes and RVEF is challenging, however, owing to the unique geometry ventricle. Several nonvolumetric indices have demonstrated prognostic value failure. Comparison studies these techniques with each other using a benchmark are limited, however. Furthermore, contribution various elements patient functional status uncertain. We therefore aimed to: (1) Determine which index correlates best determined cardiac magnetic resonance (CMR) imaging (the accepted gold standard measure function) (2) Ascertain predicts capacity. Methods: Eighty-three subjects (66 17 healthy controls) underwent CMR, 2D echocardiography, cardiopulmonary exercise testing for comparison CMR RVEF, 6-minute walk distance VO2 PEAK. Results: Speckle tracking strain exhibited closest association fraction. Indices weak correlation distance, but basal rate tissue velocity had good Conclusion: Strain speckle echocardiography may offer complementary information evaluation contractility its effects. (Echocardiography 2012;29:455-463)