1,329 calculators and references across 60 specialties, with formula confidence shown up front.
MADIT-CRT Response Score: Explanation and Clinical Context The MADIT-CRT Response Score is a clinical tool developed to predict the likelihood of a favorable response to cardiac resynchronization therapy with defibrillator (CRT-D) in patients with heart failure and mild symptoms. The score is based on seven baseline clinical and echocardiographic variables: female sex, non-ischemic etiology, left bundle branch block
Maron Model (HCM SCD Prediction): Explanation and Clinical Context The Maron Model is a validated risk prediction tool for estimating the 5-year risk of sudden cardiac death (SCD) in patients with hypertrophic cardiomyopathy (HCM). It incorporates easily obtainable clinical and echocardiographic variables, including maximal left ventricular wall thickness, left atrial diameter, left ventricular outflow tract gradient
MIDA Mortality Risk (Degenerative MR Surgery): Explanation and Clinical Context The MIDA Mortality Risk Score is a validated prognostic model derived from the Multicenter International Database on Mitral Valve Regurgitation (MIDA) registry. It uses seven clinical and echocardiographic parameters — age, symptoms, atrial fibrillation, left ventricular ejection fraction (LVEF), LV end-systolic diameter (LVESD), left atr
MIRACLE Score: Explanation and Clinical Context The MIRACLE Score is a validated scoring system designed to predict the likelihood of a positive response to Cardiac Resynchronization Therapy (CRT) in patients with advanced heart failure. It incorporates clinical and echocardiographic variables including age, QRS duration, ischemic etiology, left ventricular ejection fraction (LVEF), and NYHA functional class. The tot
Mitral Clip Registry Risk Score (MCRRS): Explanation and Clinical Context The Mitral Clip Registry Risk Score (MCRRS) is a validated point-based tool designed to predict short-term and mid-term mortality in patients undergoing transcatheter edge-to-edge mitral valve repair (TEER) using MitraClip. It incorporates clinical, echocardiographic, and comorbidity factors including age, NYHA class IV, left ventricular ejecti
Mitral Regurgitation Severity Index (MRSI): Explanation and Clinical Context The Mitral Regurgitation Severity Index (MRSI) is a composite scoring system used to quantify the severity of mitral regurgitation (MR). It integrates echocardiographic parameters including vena contracta width, effective regurgitant orifice area (EROA), regurgitant volume, left ventricular end-systolic diameter (LVESD), left ventricular eje
Myocardial Work Efficiency Index (MWEI): Explanation and Clinical Context The Myocardial Work Efficiency Index (MWEI) is a novel, non-invasive echocardiographic parameter derived from left ventricular (LV) pressure–strain loops. It integrates LV deformation (strain) and afterload to evaluate the energy efficiency of myocardial contraction. The index is calculated as the ratio between Global Constructive Work (GCW)—th