Left ventricular stroke work predicts outcome in heart failure

Cumulative survival for 219 patients who underwent hemodynamic monitoring during exercise testing is related to peak exercise left ventricular stroke work index (SWI); two-year survival is better in those with a peak exercise SWI >30 gm/m² (91 versus 54 percent for SWI ≤30 gm/m², p<0.0001).