diagnosed hyperthyroidism known issue heart valves severe chronic obstructive pulmonary disease copd significantly overweight compared people height feel slightly dizzy lightheaded heart attack angina chest pain known heart defect feel heart beating fast racing irregularly missing beat feel palpitations traveled country last 4 weeks symptoms increased physical exertion alleviated rest
psvt anemia scombroid food poisoning atrial fibrillation
Atrial fibrillation