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A semi‐automated method to quantify left ventricular diastolic inflow propagation by magnetic resonance phase velocity mapping
Author(s) -
Milet Sylvain F.,
Mayberry Jennifer L.,
Ivarsen Hanne R.,
Eschen Ole,
Houlind Kim,
Pedersen Erik M.,
Yoganathan Ajit P.
Publication year - 1999
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/(sici)1522-2586(199904)9:4<544::aid-jmri6>3.0.co;2-9
Subject(s) - diastole , cardiology , inflow , magnetic resonance imaging , ventricular outflow tract , stenosis , medicine , nuclear medicine , physics , blood pressure , radiology , mechanics
A new method of analysis was used for clinical magnetic resonance phase velocity mapping (PVM) to quantify propagation speed (PS) of early diastolic left ventricular (LV) inflow. A group of older volunteers (OV; n = 21, age 58 ± 11 years) and a group of aortic stenosis patients (AS; n = 21, age 69 ± 8 years) were studied. PVM was used to measure diastolic inflow in the LV outflow tract plane. PS was quantified by a semi‐automated method (Auto) and by an operator (Manual). The mean ± SD PS was 0.71 ± 0.21 (Auto) and 0.67 ± 0.23 (Manual) m/sec in the OV group, versus 0.49 ± 0.28 (Auto) and 0.43 ± 0.18 m/sec (Manual) in the AS group. There were no differences in peak transmitral E‐wave ( P = 0.70) between OV and AS. However, there were differences in PS‐Auto ( P = 0.0079) and PS‐Manual ( P = 0.0007) between the two groups. PS is a promising index for identifying diastolic LV dysfunction in AS patients. The semi‐automated technique is a practical approach for quantifying LV filling. J. Magn. Reson. Imaging 1999;9:544–551. © 1999 Wiley‐Liss, Inc.