Objective To observe whether the head-chest leads electrocardiogram (HCECG) is better than the routine 12-leads electrocardiogram (RLECG) in different diagnosis of narrow QRS complex tachycardias.

Objective To observe whether there was difference between the head-chest leads electrocardiogram(HCECGs) and routine lead electrocardiogram(RLECGs) in the manifest accessory pathways in patients with Wolff-Parkinson-White syndrome.

12-lead ambulatory electrocardiogram changes in dilated cardiomyopathy.;

Objective To evaluate the value of 12-lead ambulatory electrocardiogram(Holter) and treadmill exercise test in diagnosing myocardial ischemia of coronary heart disease (CHD).

Methods Compared and analyzed 12-lead ambulatory electrocardiogram(Holter) and echocardiogram of 60 patients with dilated cardiomyopathy.

Based on the wavelet transform arithmetic,an ECG waveform auto-detecting algorithms was studied,a computer aided waveform identifying system with 12-lead synchronized ECG was provided,This system was more conveniently to measure and detect ECG waveform for clinical doctors,and raised accuracy and positive detecting ratio of ECG.

EASI-derived 12-lead electrocardiogram for the detecting perioperative myocardial ischemia episodes in orthopaedic surgery in general anesthesia;