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Figure 1 (A) Correlation between apnea-hypopnea index (AHI) and interventricular septum thickness (IVS). (B) Correlation between apnea-hypopnea index and left ventricle stroke volume (SV). (C) Correlation between apnea-hypopnea index and right ventricular (RV) free wall tissue Doppler systolic velocities (RV Sm).