Prognostic Value of Valsalva Maneuver-Induced Change in Doppler-Detected Ventricular Filling in Patients With Systolic Dysfunction
Keywords: نارسایی قلب; Heart failure; Echocardiography; Prognosis; Insuficiencia cardÃaca; EcocardiografÃa; Pronóstico; HR; hazard ratio; CI; confidence interval;