atrial tachycardia短语¹⁴⁴⁹⁷²⁺² 基本例句 医心房性心博过速 Objective:To Analysis the ECG P wave morphology pacing in different sites from the atrium in patients and investigate the value of P wave morphology in diagnosis of the origin of atrial tachycardia. 目的：探讨心房内各部位起搏心电图 P波形态特征，根据其 P波形态初步判断其对于心房各起源部位的预测价值。 fabiao