diagnosed hyperthyroidism known issue heart valves severe chronic obstructive pulmonary disease copd experiencing shortness breath difficulty breathing significant way significantly overweight compared people height feel slightly dizzy lightheaded heart attack angina chest pain feel heart beating fast racing irregularly missing beat feel palpitations traveled country last 4 weeks symptoms increased physical exertion alleviated rest
psvt anemia atrial fibrillation acute pulmonary edema guillain-barré syndrome myocarditis scombroid food poisoning acute dystonic reactions myasthenia gravis anaphylaxis sle possible nstemi / stemi chagas
Atrial fibrillation