Patients with acute intoxication may exhibit "holiday heart," in which dysrhythmias, especially atrial fibrillation, occur following a heavy drinking episode. Ethanol lowers the threshold for developing atrial fibrillation.
For more on the complications of alcohol poisoning, read here.
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Cite this: Michael D. Levine. Fast Five Quiz: Do You Know the Signs of and Best Treatment for Alcohol Poisoning? - Medscape - Dec 19, 2014.