Why do I get heart palpitations after drinking?

Heart palpitations after drinking are common enough to have a clinical name: holiday heart syndrome - alcohol-triggered rhythm disturbances, classically atrial fibrillation, appearing in people who binge drink even without underlying heart disease. Alcohol irritates the heart's electrical system directly, dehydrates, shifts electrolytes, and spikes adrenaline - and the NIAAA lists arrhythmias among alcohol's documented cardiovascular effects. The sensations: a racing, fluttering, or pounding heartbeat, a skipped-beat thump, sometimes with lightheadedness, typically during or the morning after heavier drinking. What to do in the moment: stop drinking for the night, hydrate, sit down, and slow-breathe - most episodes settle as the alcohol clears. The pattern rule: palpitations that reliably follow drinking are your heart reporting sensitivity to the dose, and repeated episodes deserve a provider visit for an ECG, since alcohol-related AFib raises stroke risk over time and is a documented reason to cut down or stop. Emergency signs: palpitations with chest pain, fainting or near-fainting, severe breathlessness, or a fast irregular heartbeat that does not settle - those are ER symptoms whatever the trigger. And a racing heart with vomiting that will not stop after heavy drinking is a same-day call too. For recurring milder flutters: track episodes against intake, and bring the log to your provider - it is the most useful evidence you can carry. Pymander is a free AI doctor, 24/7 by text. Describe the palpitations and the drinking pattern, and it can help you judge urgency.