diagnosed hyperthyroidism known issue heart valves experiencing shortness breath difficulty breathing significant way feel slightly dizzy lightheaded 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