diagnosed hyperthyroidism severe chronic obstructive pulmonary disease copd experiencing shortness breath difficulty breathing significant way high blood pressure take medications treat high blood pressure 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
myocarditis pulmonary embolism atrial fibrillation guillain-barré syndrome acute dystonic reactions myasthenia gravis psvt unstable angina
Atrial fibrillation