What are the Symptoms of Atrial Fibrillation?
What do AFib symptoms actually feel like? In this video, cardiac electrophysiologist Dr. Scott Lee explains how the symptoms of atrial fibrillation come from a rapid, uncontrolled heart rate — and why AFib can feel exactly like suddenly exercising hard, even when you’re sitting still. You’ll learn: • The real source of AFib symptoms (abnormal electrical signals) • Why AFib makes your heart race like you’re on a treadmill • Why your brain controls your heart rate in normal rhythm — but not in AFib • The most common symptoms: palpitations, shortness of breath, fatigue, chest discomfort, lightheadedness • Why symptoms vary depending on how fast AFib makes your heart beat • Why AFib symptoms feel worse than “exercise fast” heart rates • What it means when you can’t slow the heart rate down on your own • Why AFib symptoms don’t improve with rest the way normal rhythm does This breakdown will help you recognize the difference between normal fast heart rates (from exercise or stress) and abnormal fast heart rates caused by atrial fibrillation. If you feel like you understand the pieces but aren’t sure how to put them together for your situation, I created a structured program that walks through this step by step. 🧭 AFib Clarity Program: 👉 https://heart.drscottlee.com/clarity 👨⚕️ About Dr. Scott Lee Dr. Scott Lee is a board-certified cardiac electrophysiologist with over 20 years of experience specializing in the treatment of complex and advanced atrial fibrillation. Stanford-trained and nationally recognized for his high single-procedure success rates in late-stage AFib, Dr. Lee is known for bringing honesty, transparency, and elite technical skill to a field where many patients feel rushed, dismissed, or confused. Through his AFibEducation YouTube channel and his direct-pay consultation practice, Dr. Lee focuses on what most doctors don’t have time to explain: how AFib truly progresses, why treatments succeed or fail, and how patients can make informed, confident decisions about their care. He is committed to ethics, patient advocacy, and clear education—empowering people to take back control of their health instead of getting lost in a broken system. 📚 Additional Resources: Continue learning step-by-step here: • Start Here: AFib Explained Clearly Not sure what stage your AFib is in? This free self-assessment will help you understand where you are and what it means: https://heart.drscottlee.com/quiz If you feel like you understand the pieces but want a clear, personalized plan for your situation: https://heart.drscottlee.com/review More AFib education and resources: https://drscottlee.com 👍 If this helped, consider sharing it—it may help someone else. 💬 Questions? Drop them below. 🔔 Subscribe for more AFib education. ⏱️ Chapters 00:00 – What Causes AFib Symptoms? 00:07 – How AFib Takes Over the Heart’s Electrical System 00:30 – Why AFib Makes Your Heart Race 00:59 – Comparing AFib to Exercising on a Treadmill 01:17 – Common AFib Symptoms Explained 01:43 – Why Exercise and AFib Feel Similar 02:02 – “Why Do I Feel Bad If I’m Not Exercising?” 02:24 – Why You Cannot Control an AFib Episode #AFibSymptoms #AFib #HeartRhythm
