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本文对100例COPD病人与15例正常人经微导管同步记录心电图及肺动脉压力曲线,测量RPEP/RVET比值,通过肺动脉平均压与RPEP/RVET比值对比,提出了RPEP/RVET比值>0.42为右心室受损,此比值在0.42～0.45为可疑肺心病,>0.45为肺心病的诊断标准。通过同步记录EKG、PCG、右心各腔室压力曲线、肺阻抗图及其微分图及右心室心尖搏动图,提出肺阻抗图及其微分图应分为4个时相,即房波、右心室等容收缩波、右心室射血波及舒张波。提出了在肺阻抗微分图中右心室射血点及射血终止点的定点,及测量RPEP/RVET比值的方法,用以评定右心室功能及诊断慢性肺心病。并认为C波峰-P_2音间期可能对肺动脉高压有诊断价值。
In this paper, 100 patients with COPD and 15 normal subjects were simultaneously recorded ECG and pulmonary arterial pressure curve by microcatheter. The ratio of RPEP / RVET was measured. The ratio of RPEP / RVET was 0.42 for the right ventricle The ratio was 0.42 ~ 0.45 for suspected pulmonary heart disease,> 0.45 for the diagnosis of pulmonary heart disease. By synchronously recording EKG, PCG, pressure curve of each chamber of the right heart, lung impedance map and its differential graph, and right ventricular apexcardiogram, it is suggested that the pulmonary impedance map and its differential graph should be divided into four phases, namely, the room wave, the right Ventricular isovolumic contractile waves, right ventricular ejection and diastolic waves. In this paper, we propose the fixed point of the right ventricular ejection site and the end point of ejection in the lung impedance differential graph and the method of measuring the RPEP / RVET ratio to evaluate the right ventricular function and diagnose chronic pulmonary heart disease. And that C-peak-P_2 interval may have diagnostic value of pulmonary hypertension.