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Figure 2 Distribution of LV Mass Index According to Gender

Mean left ventricular (LV) mass index +2 SD (solid lines) and +3 SD (dashed lines) of the reference control population are reported. The LV mass in hypertrophic cardiomyopathy patients was defined as normal when <2 SD, mildly increased when within 2 to 3 SD, and markedly increased when >3 SD of control subjects. Higher reference values in male subjects account for the greater number of male patients with normal LV mass index compared with female patients.