“Holiday heart (holiday heart syndrome) is a condition with a short-term abnormal heart rhythm (arrhythmia). It happens after drinking beverages that have alcohol in them.  Alcohol can lead to atrial fibrillation (AFib) for a day or two after you stop drinking. It happens after people have multiple drinks with alcohol in them. Treatments are available. People usually recover in a day, but holiday heart can be dangerous if it causes a stroke or other complications.”

Cleveland Clinic (Holiday Heart Syndrome: Symptoms & Treatment)