1,329 calculators and references across 60 specialties, with formula confidence shown up front.
Pacemaker Requirement Index after TAVR: Explanation and Clinical Context This calculator estimates the probability of requiring a permanent pacemaker (PPM) within about 60 days after Transcatheter Aortic Valve Replacement (TAVR). Key independent predictors include pre-existing right bundle branch block (RBBB), a larger pre-procedural aortic valve area (AVA), and a higher ratio of post- to pre-procedural AVA, reflecti
Mitral stenosis *Specific findings Echocardiographic assessment of valve stenosis: EAE/ASE recommendations for clinical practice (2009)
Aortic Stenosis Recommendations on the Echocardiographic Assessment of Aortic Valve Stenosis: A Focused Update from the EACVI and the ASE (2017)
Pulmonary Stenosis Echocardiographic assessment of valve stenosis: EAE/ASE recommendations for clinical practice (2009)
Tricuspid Stenosis *Specific findings Echocardiographic assessment of valve stenosis: EAE/ASE recommendations for clinical practice (2009)
Paravalvular Leak (PVL) Severity Score: Rationale, Calculations, and Clinical Use This tool consolidates validated catheter-based hemodynamic indices to grade PVL severity immediately after transcatheter aortic valve replacement (TAVR). The core metric is the Aortic Regurgitation Index (ARI), defined as ((DBP − LVEDP) / SBP) × 100. Lower values imply greater diastolic run-off into the LV and more severe PVL. In the s
PARTNER Risk Model (TAVR substudies): Explanation and Clinical Context The PARTNER Risk Model is a validated tool to estimate 30-day mortality risk after transcatheter aortic valve replacement (TAVR) in high-risk or inoperable patients. It uses clinical variables available pre-procedure, including age, serum creatinine, NYHA functional class III/IV, body mass index (BMI), and serum albumin. The model calculates the p
PLAX (Parasternal Long Axis) PLAX (Parasternal Long Axis) LV : Left ventricle, RV : Right ventricle, AV : Aortic valve, LA : Left atrium, LVOT : Left ventricular outflow tract, IVS : Interventricular septum, MV : Mitral valve. PLAX (Zoomed MV) LA : Left atrium, MV : Mitral valve, PLAX : Parasternal long axis. PLAX (Increased Depth) LV : Left ventricle, RV : Right ventricle, Ao : Aorta, LA : Left atrium, PLAX : Parast
Postoperative AKI after Cardiac Surgery (AKICS): Explanation and Clinical Context The AKICS score is a bedside tool derived and prospectively validated to predict acute kidney injury (AKI) after elective cardiac surgery. It integrates preoperative, intraoperative, and early postoperative information available at ICU admission: combined surgery (e.g., CABG plus valve), NYHA class ≥ 2, pre-operative serum creatinine >
PSAX (Parasternal Short Axis) PSAX (Level Great Vessels � Focus on PV) RVOT : Right ventricular outflow tract, PV : Pulmonic valve, RA : Right atrium, Ao : Aorta, PA : Pulmonary artery, RPA : Right pulmonary artery, LPA : Left pulmonary artery, PSAX : Parasternal short axis. PSAX (Focus on PV and PA) Ao : Aorta, PA : Pulmonary artery, PSAX : Parasternal short axis, PV : Pulmonic valve, RVOT : Right ventricular outflo
Pulmonary Valve Annulus (PVA) Z-score — explanation and clinical context This calculator implements the regression equations published by Pettersen et al. (J Am Soc Echocardiogr 2008) to compute a z-score for the pulmonary valve annulus relative to body size. Pettersen and colleagues derived nonlinear polynomial regression models on the natural-log transformed echocardiographic measurements against body surface area