MR velocity mapping revealed regional variations in left ventricular long-axis motion, with peak early-diastolic velocity highest in the lateral wall (140 mm/sec) and declining with age (P<0.001).
Cross-Sectional (n=31)
Does MR velocity mapping effectively assess regional left ventricular long-axis motion in healthy subjects?
MR velocity mapping demonstrates regional variations in left ventricular long-axis motion, with peak early-diastolic velocity declining with age.
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.
Karwatowski et al. (Tue,) conducted a cross-sectional in Healthy subjects (n=31). MR velocity mapping was evaluated on Regional left ventricular long-axis velocity. MR velocity mapping revealed regional variations in left ventricular long-axis motion, with peak early-diastolic velocity highest in the lateral wall (140 mm/sec) and declining with age (P<0.001).
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