Electrocardiography | 合法醫療器材資訊網

EarlyECGmachineswereconstructedwithanalogelectronics,wherethesignaldroveamotortoprintoutthesignalontopaper.Today,electrocardiographsuse ...

Examination of the hearts electrical activity

Electrocardiography is the process of producing an electrocardiogram (ECG or EKG[a]), a recording of the hearts electrical activity through repeated cardiac cycles.[4] It is an electrogram of the heart which is a graph of voltage versus time of the electrical activity of the heart[5] using electrodes placed on the skin. These electrodes detect the small electrical changes that are a consequence of cardiac muscle depolarization followed by repolarization during each cardiac cycle (heartbeat). Changes in the normal ECG pattern occur in numerous cardiac abnormalities, including cardi...