characterize pain: feel pain intense pain pain radiate location precisely pain located fast pain experiencing shortness breath difficulty breathing significant way feel slightly dizzy lightheaded feel lightheaded dizzy feel like faint feel heart beating fast racing irregularly missing beat feel palpitations traveled country last 4 weeks recently taken decongestants substances may stimulant effects
atrial fibrillation pulmonary embolism psvt guillain-barré syndrome anemia myocarditis scombroid food poisoning acute dystonic reactions anaphylaxis
PSVT