Figure 4.
Typical changes of cardiac morphology during various durations of exposure to high altitude. End-systolic short-axis images. (A) Han lowlanders (controls) with normal volume and thickness. (B) Short-term Hans migrants (<1 year) had enlarged RV with the leftward shifted interventricular septum. (C) Long-term Hans migrants (>5 years) had significantly thickened LV wall with recovered RV size. (D) Native Tibetans had no or minimal differences in LV structure compared with Han lowlanders. RV, right ventricular; LV, left ventricular.