Fig 3. Comparison of mitral peak early diastolic filling velocity and peak late diastolic filling velocity in 139 lowlanders at the altitudes of 500 m, 3700 m and 4400 m.

At the elevated altitudes, the peak E velocity decreased, initially increasing within 24 h at 3700 m but decreasing by day 7 at 4400 m. (Note: **P<0.01, compared with 500 m; ^##P<0.01, compared with 3700 m.)