diagnosed hyperthyroidism known issue heart valves severe chronic obstructive pulmonary disease copd experiencing shortness breath difficulty breathing significant way diabetes significantly overweight compared people height feel slightly dizzy lightheaded known heart defect feel heart beating fast racing irregularly missing beat feel palpitations traveled country last 4 weeks
psvt anemia myocarditis guillain-barré syndrome atrial fibrillation scombroid food poisoning acute dystonic reactions myasthenia gravis anaphylaxis sle chagas
Atrial fibrillation