Impact of stroke volume on mitral annular velocities derived from tissue Doppler imaging.
نویسندگان
چکیده
M itral annular velocities derived from pulsed tissue Doppler imaging (TDI) were recently demonstrated to complement the analysis of systolic and diastolic left ventricular (LV) performance in different clinical settings. 2 The early diastolic mitral annular velocity (E9) was found to behave as a preload independent index of relaxation. The mitral E/E9 ratio (that is, the mitral E velocity corrected for the influence of relaxation) has been suggested as an estimate of LV filling pressures. We hypothesised that LV stroke volume (SV) impacts on mitral annular velocities derived from TDI. Thus, mitral annular velocities should be altered in the presence of either increased or reduced SV.
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عنوان ژورنال:
- Heart
دوره 91 2 شماره
صفحات -
تاریخ انتشار 2005