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Assessment of regional left ventricular long‐axis motion with MR velocity mapping in healthy subjects
Author(s) -
Karwatowski Stefan P.,
Mohiaddin Raad,
Yang Guang Z.,
Firmin David N.,
Sutton Martin St John,
Underwood S. Richard,
Longmore Donald B.
Publication year - 1994
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880040209
Subject(s) - ventricle , diastole , apex (geometry) , cardiology , long axis , systole , medicine , magnetic resonance imaging , anatomy , physics , nuclear magnetic resonance , geometry , mathematics , blood pressure , radiology
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.