Other heart conditions and panic attacks can mimic symptoms of atrial fibrillation, including a fast heartbeat, chest pain, difficulty breathing, and dizziness. To diagnose atrial fibrillation, your doctor will check your symptoms, take a medical history, ask about family history of heart problems, and do a complete cardiac exam including an electrocardiogram (EKG), which measures the electrical waves your heart makes. He will also look for symptoms such as swollen feet, which may be a sign of heart failure, a common cause of atrial fibrillation. Only after a thorough examination will he diagnose atrial fibrillation.
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