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
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
PFO Closure Risk (RoPE) Score: Explanation and Clinical Context The RoPE (Risk of Paradoxical Embolism) score is a validated 10-point tool designed for patients with cryptogenic ischemic stroke in whom a patent foramen ovale (PFO) is detected. It estimates how likely the index stroke is causally related to the PFO (rather than incidental) and contextualizes the expected 2-year recurrence risk under medical management
PROGRESS-CTO Success Index: Explanation and Clinical Context The PROGRESS-CTO (Prospective Global Registry for the Study of Chronic Total Occlusion Intervention) Success Index is a validated scoring system that predicts the likelihood of successful percutaneous coronary intervention (PCI) in patients with chronic total occlusion (CTO). This score incorporates five angiographic variables that independently predict pro