Pulmonary embolism

Pulmonary embolism causes ECG signs of acute pulmonary hypertension or right ventricular strain. It most commonly causes a sinus tachycardia. Other changes include RBBB (complete or incomplete), right axis deviation, R in V1, right atrial enlargement, S1Q3T3, clockwise rotation, atrial arrhythmias and nonspecific ST-T changes.

See also: Pulmonary and Pericardial

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In the ECGquest archives, this ECG has been tagged with: - Loss of consciousness Normal Axis Regular Tachycardia Inverted T waves S1Q3T3 ST elevation in aVR Sinus tachycardia Acute right heart strain Pulmonary embolism 12-Lead Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
Comatose after opiate overdose, with tachycardia and hypotension
In the ECGquest archives, this ECG has been tagged with: - Dizziness Dyspnoea Syncope Right Axis Deviation Tachycardia RSR' Wide QRS Wide complex tachycardia RBBB Pulmonary embolism 12-Lead Dr Smith's ECG Blog CC BY-NC
RBBB. Is there ST Elevation in III and aVR, with reciprocal ST depression in I and aVL?

This ECG is from a man of unknown age who presented with dizziness and dyspnoea on a background of stage 4 lymphoma. He was tachycardic, tachypnoeic (31) and hypoxic (SpO2 79%). The lungs were clear on auscultation.