ECG Atlas — Real ECG Cases & Interpretation

Interpreting ECGs can be challenging — even for experienced clinicians. ECG Atlas helps you build confidence by exposing you to real-life ECG tracings with concise explanations and trusted reference links. Whether you are identifying WPW, Torsades de Pointes, or common rhythm abnormalities, ECG Atlas puts practical ECG interpretation learning in your pocket.

Why ECG Interpretation Matters

The 12-lead electrocardiogram remains one of the most important diagnostic tools in clinical medicine. It is fast, non-invasive, and available at virtually every point of care — from the emergency department to the ambulance. A correct ECG interpretation can identify life-threatening conditions within seconds: acute myocardial infarction, cardiac arrhythmias, electrolyte disturbances, and pulmonary embolism all leave characteristic patterns on the tracing.

Yet reading ECGs is a skill that takes practice. Textbook diagrams only go so far. Real clinical tracings are noisy, ambiguous, and rarely look as clean as the illustrations. That is why ECG Atlas focuses exclusively on real ECG cases — the kind you will encounter on the wards.

Key Features

• Real ECG cases — learn from actual clinical tracings, not textbook diagrams
• Clear diagnostic summaries — concise explanations for each ECG interpretation
• Curated references — links to trusted cardiology sources for deeper study
• Portable learning — study ECG interpretation anywhere, anytime on iPhone and iPad
• Growing library — new cases added to keep your learning current

Common ECG Patterns Covered

ECG Atlas covers a wide range of ECG findings that healthcare professionals need to recognise. Below is an overview of some of the key patterns and diagnoses included in the app.

Cardiac Arrhythmias

Arrhythmias are among the most common reasons for ECG interpretation in clinical practice. ECG Atlas includes real tracings of both supraventricular and ventricular arrhythmias:

• Atrial fibrillation (AF) — irregularly irregular rhythm with absent P waves, the most common sustained arrhythmia worldwide
• Atrial flutter — sawtooth flutter waves, typically at an atrial rate around 300 bpm with variable AV block
• Supraventricular tachycardia (SVT) — narrow-complex tachycardia including AVNRT and AVRT
• Ventricular tachycardia (VT) — wide-complex tachycardia that may be life-threatening and requires urgent intervention
• Ventricular fibrillation (VF) — chaotic rhythm requiring immediate defibrillation
• Torsades de Pointes — polymorphic VT associated with prolonged QT interval

Conduction Abnormalities

• First-degree AV block — PR interval > 200 ms
• Second-degree AV block (Mobitz I / Wenckebach) — progressive PR prolongation before a dropped beat
• Second-degree AV block (Mobitz II) — sudden dropped beats without PR prolongation, higher risk of progression
• Third-degree (complete) AV block — complete AV dissociation requiring pacing
• Right bundle branch block (RBBB) — RSR’ pattern in V1-V2 with wide QRS
• Left bundle branch block (LBBB) — broad notched R waves in I, aVL, V5-V6
• Wolff-Parkinson-White (WPW) — delta wave, short PR interval, and wide QRS

Ischaemia & Infarction

• ST-elevation myocardial infarction (STEMI) — ST elevation in contiguous leads indicating acute coronary occlusion
• Non-ST-elevation changes — ST depression and T-wave inversions suggesting ischaemia
• Wellens syndrome — deeply inverted or biphasic T waves in V2-V3, warning sign of critical LAD stenosis
• De Winter T waves — upsloping ST depression with tall T waves, a STEMI equivalent
• Sgarbossa criteria — identifying MI in the presence of LBBB or paced rhythm

Other Important Findings

• Left ventricular hypertrophy (LVH) — voltage criteria with strain pattern
• Right ventricular hypertrophy (RVH) — right axis deviation with tall R in V1
• Hyperkalaemia — peaked T waves, widened QRS, and sine wave pattern in severe cases
• Hypokalaemia — flattened T waves, prominent U waves, ST depression
• Pericarditis — diffuse ST elevation with PR depression
• Pulmonary embolism — S1Q3T3 pattern, right heart strain, sinus tachycardia
• Long QT syndrome — QTc > 470 ms (men) or > 480 ms (women)
• Brugada syndrome — coved ST elevation in V1-V3

A Systematic Approach to ECG Interpretation

Every ECG should be read systematically. Whether you are a medical student learning the basics or an experienced physician confirming a diagnosis, following a structured approach prevents missed findings. ECG Atlas supports this by presenting each case with a clear diagnostic summary so you can compare your own interpretation against the reference.

A standard systematic approach covers:

• Rate — normal 60 – 100 bpm; bradycardia < 60, tachycardia > 100
• Rhythm — regular or irregular; P waves present before each QRS
• Axis — normal, left axis deviation, or right axis deviation
• P waves — morphology, presence, and relationship to QRS complexes
• PR interval — normal 120 – 200 ms
• QRS complex — narrow (< 120 ms) or wide; morphology in each lead
• ST segment — elevation, depression, or normal baseline
• T waves — upright, inverted, peaked, or flattened
• QT interval — corrected QTc using Bazett formula

Who Is ECG Atlas For?

ECG Atlas is designed for healthcare professionals and students who want to sharpen their ECG reading skills through real-case exposure:

• Medical students — learning ECG interpretation during clinical rotations
• Residents — in internal medicine, cardiology, and emergency medicine
• Nurses and paramedics — who need to recognise critical rhythms quickly
• Experienced clinicians — refreshing their knowledge with real tracings

What Users Say

“A handy little app, a good resource.”

— Australian App Store

Learn ECG Interpretation by Doing

The best way to get better at ECG interpretation is exposure to real cases. ECG Atlas gives you a growing library of clinical ECGs with the context you need to learn from each one — concise diagnostic summaries and curated reference links for deeper study.

Use ECG Atlas alongside CliniCalc for clinical calculations and Medical Lab Tests for lab value interpretation to have a complete clinical reference toolkit on your iPhone.