1,329 calculators and references across 60 specialties, with formula confidence shown up front.
Pacing-Induced Cardiomyopathy (PICM) Score: Explanation and Clinical Context The PICM Score estimates the risk of developing pacing-induced cardiomyopathy in patients with chronic right ventricular pacing. This condition is characterized by left ventricular systolic dysfunction caused by ventricular dyssynchrony induced by long-term RV pacing. The score incorporates the percentage of RV pacing, baseline left ventricu
PM Dependency Index: Explanation and Clinical Context The Pacemaker (PM) Dependency Index (PDI) is a quantitative tool used to estimate the degree of a patient’s reliance on ventricular pacing. It integrates intrinsic heart rate, ventricular pacing percentage, and atrioventricular block severity to provide a composite score. A higher PDI indicates greater pacemaker dependency, which can guide clinicians in device pro
PROSPECT Echo Score: Explanation and Clinical Context The PROSPECT Echo Score is designed to predict the likelihood of a positive response to cardiac resynchronization therapy (CRT) based on echocardiographic and electrocardiographic parameters. Key variables include LVESV reduction percentage, QRS duration, mitral regurgitation severity, and left ventricular dyssynchrony index. Each parameter that meets a threshold
PVI-ICD Mortality Risk Score: Explanation and Clinical Context The PACE risk score is a validated tool to estimate 1-year mortality risk for patients with an Implantable Cardioverter-Defibrillator (ICD) implanted for primary prevention. It incorporates four clinical variables: age >70 years, creatinine >2.0 mg/dL, ejection fraction <20%, and the presence of peripheral arterial disease (PAD). A total score of >3 indic