The most common electrocardiographic changes of acute
right-heart overload/failure
Sinus tachycardia
T-wave inversion in leads V1-V4, III and aVF
Incomplete or complete right bundle branch block
Cardiac axis tilt >90°
S-wave in lead I and Q wave in lead III
Atrial fibrillation
P pulmonale in leads II and III
ST-segment elevation in leads V1-V2
Sinus tachycardia
T-wave inversion in leads V1-V4, III and aVF
Incomplete or complete right bundle branch block
Cardiac axis tilt >90°
S-wave in lead I and Q wave in lead III
Atrial fibrillation
P pulmonale in leads II and III
ST-segment elevation in leads V1-V2
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