Electrocardiography
Electrocardiogram (ECG) is a technology that records the changes in
cardiac electrical activity during each cardiac cycle from the body
surface[41]. It can not only reflect the changes
in the heart rhythm, but also has a prompting effect on pericarditis,
especially for patients with CP who are not accompanied by pericardial
thickening or calcification. Morris first introduced the P-wave terminal
force (PTF) in lead V1 (PTFV1) measured by 12-lead ECG that can reflect
left atrial structural abnormalities and diastolic dysfunction of left
ventricular[42]. Yanhong Ren’s
study[43] indicated a close association of
abnormal PTFV1(≤-0.04mm·s) and TBCP, which could remedy the limitation
of X-ray, CT, and echocardiography examination in the TBCP diagnosis.
The abnormality of PTFV1 may associated with the load increasing of the
left atrial and the right atrial, leading to an prolongment of the left
atrial depolarization and the interatrial bundle conduction interval.
What’s more, low voltage and atrial fibrillation may be present in part
of patients with CP.