4D left ventricular resultant wall motion and blood flow assessed by phase-shift velocity mapping at high-field 3T MRI

2016 ◽  
Vol 37 (6) ◽  
pp. 615-621
Author(s):  
Stig F. Samnøy ◽  
Jochem Cuypers ◽  
Gottfried Greve ◽  
Terje H. Larsen
Keyword(s):  
Blood Flow ◽  
Phase Shift ◽  
High Field ◽  
Wall Motion ◽  
Left Ventricular ◽  
Velocity Mapping ◽  
3T Mri ◽  
Shift Velocity

Defining the mechanical border zone: a study in the pig heart

1985 ◽  
Vol 249 (1) ◽  
pp. H88-H94 ◽  
Author(s):  
K. Sakai ◽  
K. Watanabe ◽  
R. W. Millard
Keyword(s):  
Blood Flow ◽  
Wall Motion ◽  
Left Ventricular ◽  
Border Zone ◽  
Free Wall ◽  
Left Ventricular Free Wall ◽  
Ischemic Region ◽  
Wall Motion Abnormalities ◽  
Distal Border ◽  
Proximal Border

Wall motion abnormalities can occur in nonischemic areas contiguous with ischemic myocardium. The extent of the mechanical border zone contiguous with an acute myocardial ischemic region was mapped in eight open-chest anesthetized pigs using sonomicrometer crystals implanted parallel with the visible ischemic border in the subepicardium of ischemic (IZ), proximal border (BZ1), distal border (BZ2), and remote normal (NZ) zones. Regional systolic shortening fraction was near 15%, and epicardial blood flow was approximately 1.5 ml X min-1 X g-1 in all locations before ischemia was induced. Blood flow fell to less than 0.05 ml X min-1 X g-1 and the left ventricular free wall supplied by the distal one-third of the left anterior descending artery exhibited holosystolic lengthening when the vessel was occluded. After occlusion, systolic shortening fraction was depressed by 45% in the BZ1 located 3.1 +/- 1.1 mm from the ischemic margin and by 25% in the BZ2, which was measured at 9.3 +/- 1.5 mm from the ischemic margin without significant flow reduction. The NZ, 22.3 +/- 4.6 mm from ischemic margin, was unaffected by occlusion. Computer analysis of the data shows that wall motion is depressed as far as 12 mm from the ischemic margin. This abnormal wall motion surrounding focal transmural myocardial ischemia is presumed to result from mechanical tethering.

The effect of graded coronary stenosis on myocardial blood flow and left ventricular wall motion

1977 ◽  
Vol 72 (5) ◽  
pp. 479-491 ◽  
Author(s):  
M. Nakamura ◽  
H. Matsuguchi ◽  
A. Mitsutake ◽  
Y. Kikuchi ◽  
A. Takeshita ◽  
...  
Keyword(s):  
Blood Flow ◽  
Myocardial Blood Flow ◽  
Coronary Stenosis ◽  
Wall Motion ◽  
Left Ventricular ◽  
Left Ventricular Wall ◽  
Ventricular Wall ◽  
Left Ventricular Wall Motion ◽  
Ventricular Wall Motion

MR Phase-Shift Velocity Mapping of Mitral and Pulmonary Venous Flow

1991 ◽  
Vol 15 (2) ◽  
pp. 237-243 ◽  
Author(s):  
Raad H. Mohiaddin ◽  
Makoto Amanuma ◽  
Philip J. Kilner ◽  
Dudley J. Pennell ◽  
Carla Manzara ◽  
...  
Keyword(s):  
Phase Shift ◽  
Velocity Mapping ◽  
Venous Flow ◽  
Pulmonary Venous Flow ◽  
Shift Velocity

scholarly journals Magnetic resonance phase-shift velocity mapping in pediatric patients with pulmonary venous obstruction

2001 ◽  
Vol 38 (1) ◽  
pp. 262-267 ◽  
Author(s):  
Neill Videlefsky ◽  
W.James Parks ◽  
John Oshinski ◽  
Katharine L Hopkins ◽  
Kevin M Sullivan ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Phase Shift ◽  
Pediatric Patients ◽  
Pulmonary Venous Obstruction ◽  
Venous Obstruction ◽  
Velocity Mapping ◽  
Shift Velocity
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