High grade AV block

A high grade AV block means that there are 3 or more P waves for each QRS complex, so the ventricular rate is slow. This can be caused by a type 1 or 2 second degree AV block.

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In the ECGquest archives, this ECG has been tagged with: - Hypotension Syncope 12-Lead Sinus arrhythmia Sinus tachycardia High grade AV block Ventriculophasic sinus arrhythmia Acute Inferior MI Acute Posterior MI Right ventricular MI ECG Interpretation CC-BY-NC-SA
ECG Blog #168 (STEMI – complex AV Block – Laddergram – Calipers)

This ECG is from a middle-aged woman who presented with syncope and hypotension.

This ECG shows sinus tachycardia with inferior ST elevation and reciprocal ST depression in aVL. Also ST elevation in V1 and ST depression in V2-4. The most likely cause was acute inferoposterior MI due to proximal RCA occlusion.