1,329 calculators and references across 60 specialties, with formula confidence shown up front.
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
Myocardial Conduction Abnormality Score (MCAS): Explanation and Clinical Context The Myocardial Conduction Abnormality Score (MCAS) is a clinical tool developed to estimate the risk of conduction disturbances in patients with underlying cardiac disease, particularly those with prior myocardial infarction or age-related conduction changes. The score combines key variables including age, QRS duration, PR interval, pres
Myocardial Edema Ratio (MER): Explanation and Clinical Context The Myocardial Edema Ratio (MER) is a quantitative index derived from T2-weighted cardiac MRI images, calculated as the ratio of myocardial signal intensity (SI) to skeletal muscle SI. It is used to identify myocardial edema, commonly observed in acute myocardial injury such as myocarditis, acute myocardial infarction, or inflammatory cardiomyopathies. A
Myocarditis Severity Index (MRI-based): Explanation and Clinical Context The Myocarditis Severity Index (MSI) is a composite score derived from key cardiac MRI parameters, including Left Ventricular Ejection Fraction (LVEF), T2 Mapping, and Late Gadolinium Enhancement (LGE). This index aids in assessing the severity of myocarditis and predicting clinical outcomes. A higher MSI indicates greater myocardial inflammatio