diagnosed hyperthyroidism known issue heart valves experiencing shortness breath difficulty breathing significant way diabetes feel slightly dizzy lightheaded feel heart beating fast racing irregularly missing beat feel palpitations feel heart beating irregularly disorganized pattern traveled country last 4 weeks symptoms increased physical exertion alleviated rest
atrial fibrillation psvt acute pulmonary edema myocarditis pulmonary embolism panic attack anemia guillain-barré syndrome scombroid food poisoning acute dystonic reactions myasthenia gravis anaphylaxis sle
Atrial fibrillation