Lifestyle Changes That Can Calm AFib

Most people I diagnose with atrial fibrillation (AFib) assume their only options are pills or a procedure. AFib is an irregular, often fast heart rhythm that starts in the heart's upper chambers, and the procedure is usually catheter ablation, which creates tiny scars that block the stray electrical signals setting it off. Those treatments matter, and blood thinners are how we prevent strokes. But most patients don't realize how much they can change on their own. The 2023 AFib guidelines from the major U.S. cardiology societies give their strongest level of recommendation to losing excess weight, exercising, cutting back on alcohol, quitting smoking, and controlling blood pressure. In my patients, the ones who pair medical treatment with these habits tend to do best.

Key Findings & Takeaways

• Lose some weight, and keep it off: In LEGACY, an Australian study of 355 overweight people with AFib, those who lost 10% or more of their body weight were about six times more likely to stay free of AFib over several years than those who lost less. For a 220-pound person, 10% is 22 pounds. Keeping it off mattered too: people whose weight swung up and down by more than 5% were about twice as likely to have AFib come back.
• Cut way back on alcohol: In a 2020 New England Journal of Medicine trial, regular drinkers with AFib who quit or nearly quit, going from about 17 drinks a week to about 2, had AFib come back in 53% of cases over six months, compared with 73% of those who kept drinking as usual. As someone who enjoys wine myself, I don't say this lightly, but if you have AFib, less is clearly better.
• Get moving, and build up gradually: In the ACTIVE-AF trial, people with AFib who did a six-month program of supervised and at-home aerobic exercise were twice as likely to be AFib-free a year later as those who didn't (40% vs 20%), and their symptoms were milder. I ride a Peloton most mornings, but brisk walking counts just as much. The one caution: years of very high-volume endurance training, like serious marathon or long-distance cycling training, is linked to more AFib, not less. If you haven't been active, check with your cardiologist before you ramp up.
• Quit smoking: Smoking is on the guidelines' strongest-recommendation list for AFib alongside everything else here. If you've tried before, ask about medications and programs that make quitting more likely to stick.
• Keep your blood pressure controlled: High blood pressure stretches and stiffens the upper chambers over time, which feeds AFib. Your cardiologist can tell you what your own target should be. Checking it at home a few times a week and bringing the readings to your visit tells me far more than a single office reading.
• Get checked for sleep apnea: When your breathing repeatedly stops during sleep, oxygen drops and stress hormones surge, which can set off AFib. In studies that followed patients over time, people who used CPAP (a mask that keeps the airway open overnight) had fewer AFib episodes, though stricter randomized trials have been less clear-cut. Untreated apnea is bad for your heart either way, so if you snore or wake up exhausted, ask to be tested.
• Don't stop your blood thinner on your own: If your cardiologist has you on a blood thinner, feeling better doesn't mean your stroke risk has dropped. That risk depends on things like age, diabetes, high blood pressure, heart failure, or a prior stroke, not on how often you notice the rhythm. Talk to your cardiologist before making any change.

Medication and procedures treat AFib. Daily habits decide how much work they have to do.

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Reference Source: American Heart Association News — How to manage AFib with healthy lifestyle changes

Journal Article: Circulation — 2023 ACC/AHA/ACCP/HRS Guideline for the Diagnosis and Management of Atrial Fibrillation

Journal Article: Journal of the American College of Cardiology — Long-Term Effect of Goal-Directed Weight Management in an Atrial Fibrillation Cohort (LEGACY)

Journal Article: New England Journal of Medicine — Alcohol Abstinence in Drinkers with Atrial Fibrillation

Journal Article: JACC: Clinical Electrophysiology — An Exercise and Physical Activity Program in Patients With Atrial Fibrillation (ACTIVE-AF)