Abstract
PAH group compared with the mild PAH group, and the difference between the RVW and IVS TTP increased in the TVI and strain image (33.0±18.3 ms vs 51.8±24.8 ms and 85.5±56.0 ms vs 136.1± 46.2 ms, Pb0.05 or Pb0.01). In addition, the moderate-severe PAH group showed increased RVESA and RVEDA (Pb0.01), and reduced RVFAC, IVA and Sm (Pb0.05 or Pb0.01) compared with controls. Conclusions: PAH not only leads to RV remodeling, but also induces myocardial systolic asynchrony, RV myocardial contraction is markedly delayed in the moderate-severe PAH group. The pathophysiologic significance of contraction asynchrony should be discussed further.
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