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 feel heart beating fast racing irregularly missing beat feel palpitations traveled country last 4 weeks
psvt anemia guillain-barré syndrome myocarditis atrial fibrillation scombroid food poisoning acute dystonic reactions myasthenia gravis possible nstemi / stemi panic attack
Atrial fibrillation