Pulmonary Embolism on ECG
March 4th, 2023
Overview
Pulmonary embolism can produce a wide variety of ECG changes.
The most common ECG finding in PE is sinus tachycardia. The S1Q3T3 pattern is a classic finding, however this is uncommon and is only seen in ~12% of cases.
ECG Findings in Pulmonary Embolism
- Sinus tachycardia
- Atrial fibrillation / flutter
- Right bundle branch block
- T wave inversion in right precordial leads
- Right axis deviation
- P pulmonale (right atrial dilatation) - prominent P waves in inferior leads
- S1Q3T3 pattern - S wave in lead I, Q wave in in lead III, T wave inversion in lead III
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