I've had permanent afib for 10 years now, rate controlled with metoprolol and diltiazem. You always read that afib incidence and severity can be reduced if obese people with afib would lose 10% of their body weight. But would it be helpful for a normal weight person to lose weight, in order to improve the health impact of afib? My reasoning is that any weight loss would put less stress on the heart, and should be helpful for afib symptoms like occasional tiredness and mild shortness of breath. My BMI is about 22.2 (5'11", 158 pounds, male, 64 years old, exercise a couple of hours daily). If I dropped 16 pounds -- 10% of my body weight -- would I only be thinner, or would I feel better? Theoretically, I mean. Thanks!