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 traveled country last 4 weeks symptoms increased physical exertion alleviated rest
atrial fibrillation psvt myocarditis pulmonary embolism anemia acute pulmonary edema guillain-barré syndrome scombroid food poisoning acute dystonic reactions myasthenia gravis anaphylaxis sle
Atrial fibrillation