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Figure 5 LV Longitudinal Velocity and Untwisting Velocity in CP and RCM

Color M-mode display of apical untwisting velocity (rotational rate of the LV apex [RotR]) obtained from speckle tracking of the LV apex in short-axis view shows markedly attenuated early diastolic rate of untwisting in CP (A, arrows), whereas longitudinal early diastolic velocities (VL) from the LV base in apical 4-chamber view (B, arrows) are normal. In contrast, patients with RCM show a normal early diastolic rate of untwisting (C, arrows) and reduced longitudinal early diastolic velocities from the LV base (D, arrows). Abbreviations as in Figures 1 and 2.