Interactive Cardiology Calculators
ECG, ECHO, drug dosing, hemodynamics, ASCVD risk, SYNTAX score, left-main bifurcation strategy and key risk scores — validated tools in one place.
Heart Rate
From RR interval or counted large boxes (ECG @ 25 mm/s).
QT Correction (QTc)
Bazett & Fridericia formulas.
Ejection Fraction & FS
Volumes (Simpson) or linear dimensions (Teichholz).
Stroke Volume & Cardiac Output
LVOT method: SV = 0.785 × D² × VTI.
Aortic Valve Area
Continuity equation.
Weight-Based Infusion
Convert dose (mcg/kg/min) ↔ pump rate (mL/hr).
Creatinine Clearance
Cockcroft–Gault (renal dose adjustment).
MAP & BSA
Mean arterial pressure and body-surface area.
Cardiac Output (Fick)
VO₂ estimated as 125 × BSA if left blank.
SVR / PVR
Systemic & pulmonary vascular resistance.
10-Year ASCVD Risk
ACC/AHA Pooled Cohort Equations (2013). Ages 40–79.
SYNTAX Score (I)
Add each lesion ≥50% in a vessel ≥1.5 mm. Score sums automatically.
Left Main Bifurcation Strategy
Decision support based on Medina classification & LM trial evidence.
CHA₂DS₂-VASc
Stroke risk in atrial fibrillation.
HAS-BLED
Major bleeding risk on anticoagulation.
Educational decision-support only. These tools support — not replace — clinical judgement; verify every value before patient care. The SYNTAX module implements the SYNTAX I algorithm; for definitive scoring cross-check the official calculator at syntaxscore.org. The LM bifurcation tool is guidance based on Medina classification and trial evidence (DKCRUSH-V, EBC MAIN), not a directive. ASCVD uses the 2013 ACC/AHA Pooled Cohort Equations (ages 40–79).