diagnosed hyperthyroidism known issue heart valves severe chronic obstructive pulmonary disease copd experiencing shortness breath difficulty breathing significant way feel slightly dizzy lightheaded high blood pressure take medications treat high blood pressure heart attack angina chest pain known heart defect 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