Some include arrhythmia
(abnormal heart rhythm), lung disease related to smoking
, deconditioning, weak heart muscle or even just anxiety
(without any heart problems
. The first step is to see your doctor who will do a complete history & physical. Some simple, noninvasive tests might be warranted like an ecg, echocardiogram
or holter monitor
( a device that records your heart rhythm for a period of time in order to detect what is actually happening at the time that you feel symptoms).