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为探讨移居高海拔地区一年以上人心脏改变及返平原后的转归，应用ＥＣＧ、Ｘ线、ＵＣＧ对８１名青年作了动态观察，高原ＥＣＧ提示：ＨＲ明显增快，ＳＴ－Ｔ普遍呈缺血性改变，部分伴传导障碍：ＲＶＨ占６４．２％，双室肥厚２１％，ＬＶＨ仅一例，ＵＣＧ见右室内径增大和流出道增宽。Ｘ线下右心及双侧心影增大。返平原９天，ＨＲ迅速减慢，窦性心动过缓增多．其余指标均有好转。３０天时，ＥＣＧ的ＲＶＨ已基本消失，ＵＣＧ指标９３％恢复正常。Ｘ线下心影大部好转。２８５天时均转为正常。说明：高原心脏改变随海拔的升高而加剧；ＲＶＨ和室腔的增大并存；左心受累并非罕见。随返平原时间的延长，心脏改变可逐渐恢复。
To investigate the outcome of heart surgeries and return to the plain after more than one year of emigration in high altitude areas, 81 young adults underwent dynamic observation using ECG, X-ray and UCG. Altitude ECG showed that HR was significantly increased and ST-T was generally Ischemic changes, some with conduction disorders: RVH accounted for 64.2%, double hypertrophy in 21%, only one case of LVH, UCG see the right ventricular diameter increased and the outflow tract widened. Right X-ray and bilateral heart shadow increased. Return to plain 9 days, HR rapidly slowed down, increased sinus bradycardia. The remaining indicators have improved. At 30 days, ECG RVH had almost disappeared, 93% of UCG index returned to normal. X-ray most of the improvement of heart shadow. 285 days were normal. Description: Altered plateau changes with altitude increased exacerbation; RVH and ventricular enlargement co-exist; left heart involvement is not uncommon. With the return of plain time, heart changes can be gradually restored.