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| Application of TDI-Tei Index in Evaluation of Right Ventricular Function in Patients with High Altitude Pulmonary Hypertension |
| Cairang Zhuoma, ZHAO Xu, XUE Linyan |
| The Affiliated Hospital of Qinghai University, Qinghai Xi'ning 810001, China |
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Abstract Objective:To analyze the relationship between Tei index and pulmonary artery pressure measured by pulsed Doppler imaging and tissue Doppler imaging, and to explore its value in evaluating right ventricular function in patients with pulmonary hypertension at high altitude. Methods: Sixty patients with pulmonary hypertension treated in our hospital from July 2016 to January 2018 were selected as study subjects. According to the degree of pulmonary arterial pressure, the patients were divided into mild, moderate and severe subgroups, 20 cases in each group, at the same time, normal subjects (control group, 30 cases) and healthy people (plain group, 30 cases), pulse wave Doppler imaging and Tissue Doppler imaging were used to measure the tricuspid annulus in each group. The ejection fraction, isovolumic systolic phase, isovolumic diastolic phase, the Tei index of each group of patients was calculated and the relationship between TDI-Tei index and pulmonary pressure was analyzed. Results: From plain to control group to mild to severe PAH group, the indexes of ICT and IRT increased gradually, ET index decreased gradually, but PW-Tei and TDI-Tei index increased gradually (P<0.05). The indexes of ET in TDI group were significantly higher than those of PW group, while the indexes of ICT and IRT were significantly lower than those in PW group. The final Tei index was significantly higher than that in PW group (P<0.05). Pearson correlation analysis of TDI-Tei, PW-Tei index and pulmonary artery systolic pressure showed that there was a positive correlation between TDI-Tei and PW-Tei index and pulmonary artery systolic pressure (r=0.968, P<0.01; r= 0.732, P<0.01). Conclusion: Both PW-Tei and TDI-Tei index can evaluate the right cardiac function of patients with pulmonary hypertension at high altitude, and the accuracy and sensitivity of TDI-Tei index are higher. It is worthy of clinical application.
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2018, Vol. 24 
