1,329 calculators and references across 60 specialties, with formula confidence shown up front.
E-CPET Score: Explanation and Clinical Context The E-CPET Score integrates cardiopulmonary exercise testing (CPET) parameters with echocardiographic findings to assess the risk of adverse outcomes in patients with congenital heart disease (CHD). It combines peak oxygen consumption (VO₂peak), ventilatory efficiency (VE/VCO₂ slope), right ventricular ejection fraction (RVEF), and patient age to provide a comprehensive
E/e' Ratio: Explanation and Clinical Context The E over e prime ratio is one of the most widely used echocardiographic indices to estimate left ventricular filling pressure. The E wave represents early diastolic transmitral flow velocity which increases when the left atrial pressure rises. The e prime velocity is measured at the mitral annulus and reflects the intrinsic rate of myocardial relaxation. Since e prime de
Echocardiographic PH Probability Algorithm (TTE-based): Explanation and Clinical Context This calculator applies the 2022 ESC/ERS transthoracic echocardiographic algorithm for pulmonary hypertension (PH). It integrates the peak tricuspid regurgitation velocity (TRV) with secondary echocardiographic signs grouped into three categories (A, B, and C). A TRV > 3.4 m/s alone indicates a high probability of PH. When TRV is
EchoCRT Non-response Risk Score: Explanation and Clinical Context The EchoCRT Non-response Risk Score was developed from the EchoCRT trial population to predict the likelihood of non-response to cardiac resynchronization therapy (CRT). The model integrates clinical, electrocardiographic, and echocardiographic parameters to stratify patients based on the probability of failing to show symptomatic or reverse remodeling