ECG Online: Calculators and Interpretation Trainer

Free tools for electrocardiogram interpretation: calculate corrected QT, heart rate, electrical axis of the heart, check Sgarbossa criteria, and practice on real clinical tracings.

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Calculators

7 interactive tools. No registration required, formulas and interpretation based on current guidelines.

QTc — Corrected QT
Corrected QT using 4 formulas: Bazett, Fridericia, Framingham, Hodges
Heart Rate by R-R Interval
Heart rate calculation based on R-R duration
Electrical axis of the heart
Determination of QRS axis using amplitudes in I and aVF
Sgarbossa Criteria
Diagnosis of AMI in the setting of left bundle branch block (LBBB)
Tisdale Score (QT Prolongation Risk)
Prognosis of QT prolongation in hospitalized patients
CHA₂DS₂-VASc
Stroke risk assessment in atrial fibrillation
HEART Score
Risk stratification in chest pain

Interpretation Trainer

3 cases free, no registration required

Real clinical scenarios

Get an ECG tracing with a description, answer the question, and view the case review immediately. Cases: inferior STEMI, atrial fibrillation, prolonged QT, LVH, and others.

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Educational Articles

Detailed reviews on core ECG topics.

Concise Clinical Guidelines of the Russian Ministry of Health

All cardiology clinical guidelines in one place: AMI, ACS, atrial fibrillation, CHF, hypertension, arrhythmias. Condensed to the essentials, with interactive lessons, checklists, and tests.

Open Cardiology Guidelines