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Assessment of Regional Left Ventricular Long-Axis Motion with MR Velocity Mapping in Healthy Subjects
Stefan P. Karwatowski, RH Mohiaddin, Guang-Zhong Yang, D.N. Firmin, M.S.J. Sutton, S.R. Underwood, D.B. Longmore
- Journal Article
- Journal of Magnetic Resonance Imaging
- Volume 4
- Issue 2
- pp.151–155
- November, 1994
- Abstract
The pattern of left ventricular long-axis motion during early diastole was assessed with magnetic resonance (MR) velocity mapping in 31 healthy volunteers. Regional long-axis velocity varied with time and position around the ventricle. During systole, the base descended toward the apex. The greatest magnitude of long-axis velocity occurred during early diastole. The lateral wall had the highest velocity (140 mm/sec ± 40 [mean ± standard deviation]); the anterior and inferior walls had lower velocities (96 mm/sec ± 27 and 92 mm/sec ± 34, respectively). The inferoseptal area consistently had the lowest velocities (87 mm/sec ± 40). Absolute values of peak early-diastolic velocity declined with age (r = -.64, P <.001). Peak early-diastolic velocity was not dependent on heart rate (r =.014, P =.94). Regional variations in left ventricular wall motion were seen. MR velocity mapping is a useful technique for assessing regional left ventricular long-axis heart function.
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