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
atrial fibrillation psvt anemia guillain-barré syndrome acute dystonic reactions myasthenia gravis myocarditis
Atrial fibrillation