diagnosed hyperthyroidism known issue heart valves severe chronic obstructive pulmonary disease copd experiencing shortness breath difficulty breathing significant way high blood pressure take medications treat high blood pressure known heart defect feel heart beating fast racing irregularly missing beat feel palpitations traveled country last 4 weeks symptoms increased physical exertion alleviated rest
myocarditis pulmonary embolism psvt panic attack acute dystonic reactions atrial fibrillation pulmonary neoplasm unstable angina
Atrial fibrillation