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近十余年来,以心电图、心音图、颈动脉搏动图(及心尖搏动图)同步描记的方法从体表测定心缩间期以估计心脏功能已得到广泛的研究。Balasubramanian等曾先后于1975年及1978年对平原居民快速进入高原后心缩间期的变化进行了观察。国内尚未见这方面的研究报导。本工作目的是观察世居沿海平原汉族居民
In the recent ten years, ECG, phonocardiogram, carotid pulsatility chart (and apexcardiogram) were traced synchronously to measure the systolic phase from the body surface to estimate cardiac function. Balasubramanian et al. Observed the changes of the pacing period after the plain inhabitants entered the plateau in 1975 and 1978 successively. Domestic yet to see this research report. The purpose of this work is to observe the Han inhabitants living in the coastal plain