Merck Manual

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ECG, atrial fibrillation, dog
ECG, atrial fibrillation, dog

    This ECG of a dog shows a fast ventricular rate (230 bpm) and an irregular rhythm. The complexes are supraventricular (normal). There are no P waves. This combination is diagnostic of atrial fibrillation.

Courtesy of Dr. Mark D. Kittleson.