Fig 6. Comparison of the left ventricular Tei index (LV Tei index) in 139 lowlanders at the altitudes of 500 m, 3700 m and 4400 m.

The LV Tei index was significantly increased at high altitude, but there was no significant difference between the values at 3700 m and 4400 m. (Note: **P<0.01, compared with 500 m.)