Category: ECG / Electrophysiology

Old inferior wall infarction and lateral ST depression ECG shows sinus rhythm at around 75/min, with pathological Q waves in inferior leads, indicating old inferior wall myocardial infarction.

Evolved anterior wall myocardial infarction ECG shows sinus rhythm at a rate of around 100/min, with QS complexes in anterior leads along with a coved ST segment elevation

Very wide QRS complex Width of the QRS complex in this ECG is about 200 ms. It is so wide that there is hardly any ST segment visible.

Pacing in complete heart block – ECG Pacing in complete heart block (CHB): Initial part of the ECG shows narrow QRS complexes at a rate of around 43/minute.

AV block with escape beats Basic PR interval is prolonged to about 320 ms. Some P waves marked as “?” in the lead II rhythm strip are fairly

Artifacts resembling ventricular tachycardia and fibrillation Artifacts in an ECG can mimic various pathological conditions. In V1, multiple small artefacts almost totally obscure the small QRS complexes so

Deep T inversion First few conditions which come to our mind when we see deep T wave inversions are: Coronary artery disease Hypertrophic cardiomyopathy Post cardiac arrest state

Inferolateral myocardial infarction ST segment elevation is seen in inferolateral leads (II, III, aVF, V5, V6) indicating inferolateral ST elevation myocardial infarction (STEMI). There is a discordance between

Right bundle branch block with right upper quadrant axis ECG demonstrating right bundle branch block with right upper quadrant axis: rsR’ pattern in V1, rS pattern in I,

Tall peaked T waves Tall peaked T waves are seen in leads V2-V4 (C2-C4). In addition there is prominent negative component for P wave in lead V1 (C1)