The ECGĀ Blog with Reid
PVC vs. PAC with Aberrancy (Ashman Phenomenon)
Jun 11, 2025
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When confronted with a wide QRS complex that appears unexpectedly on an ECG, one of the key clinical challenges is to determine whether it's due to a premature ventricular contraction (PVC) or a premature atrial contraction (PAC) with aberrant conduction, also known as the Ashman phenomenon. Though ...
Ashman Phenomenon: A Deep Dive into Its Mechanism and Physiology
Jan 03, 2025
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Ashman phenomenon is a fascinating electrocardiographic finding characterized by an aberrantly conducted supraventricular beat. Often seen in atrial fibrillation (AF) or with premature atrial contractions (PACs), it is caused by the rate-dependent refractory properties of the bundle branches. Unders...