When Your Heart Rhythm is Off Make an Appointment Ask a Question Search Conditions This information has been reviewed and approved by Raphael Sung, MD (June 2023). When Your Heart Rhythm is Off AFIB, or atrial fibrillation, is a common type of irregular rhythm of the heart. AFIB may lead to blood clots, stroke, heart failure, early death and other serious complications. Symptoms Lightheadedness or dizziness Heart palpitations (fluttering or thumping in the chest) Shortness of breath Irregular heartbeat New or worsening fatigue Feeling like “getting old” over a short period of time New or worsening activity intolerance Facts AFIB affects both men and women 1 in 5 ischemic strokes are due to AFIB AFIB increases the risk of stroke by 5 times Women with AFIB are more likely to have a stroke than men If you have AFIB symptoms, see your doctor. A heart rhythm specialist can determine if you have atrial fibrillation and what treatment is necessary. More Information on Heart Health Living with Heart Disease Improve your Heart Health What is the Heart/Lung Connection? Maintaining a Healthy Weight Want to use this on your website? Fill out the content usage request form and then copy this code: