Assessment of regional left ventricular long-axis motion with MR velocity mapping in healthy subjects
✍ Scribed by Stefan P. Karwatowski; Raad Mohiaddin; Guang Z. Yang; David N. Firmin; Martin St John Sutton; S. Richard Underwood; Donald B. Longmore
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 645 KB
- Volume
- 4
- Category
- Article
- ISSN
- 1053-1807
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✦ Synopsis
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.