Advanced Cardiac MR Imaging of Ischemic Heart Disease

Reeder, Scott B.; Du, Yiping P.; Lima, João A.C.; Bluemke, David A.

doi:10.1148/radiographics.21.4.g01jl281047

Cited by 49 publications

(26 citation statements)

References 79 publications

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“…DTI possesses an intrinsic advantage in that it can directly detect myocardial velocity continuously through several cardiac cycles with high temporal resolution. 26 The current method, therefore, provides not only peak rotation and torsion but also the profile curve (the angular velocity and angular displacement over time) during systole and subsequent early diastole, something that the tagged MRI protocol used in this study cannot achieve because of fading of the tagging after 400 ms. 15,20 This later limitation of MRI could be overcome by retagging at end systole or steady-state free precession with myocardial tagging, 35 which can analyze LV deformation during the diastolic phase. The method used in this study was optimized for assessment of systolic function and early diastole.…”

Section: Advantage Of the Current Dti Methods For LV Torsion Assessmentmentioning

confidence: 99%

Assessment of Left Ventricular Torsional Deformation by Doppler Tissue Imaging

et al. 2005

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Background-Left ventricular (LV) torsional deformation is a sensitive index for LV performance but difficult to measure.The present study tested the accuracy of a novel method that uses Doppler tissue imaging (DTI) for quantifying LV torsion in humans with tagged magnetic resonance imaging (MRI) as a reference. Methods and Results-Twenty patients underwent DTI and tagged MRI studies. Images of the LV were acquired at apical and basal short-axis levels to assess LV torsion. We calculated LV rotation by integrating the rotational velocity, determined from DTI velocities of the septal and lateral regions, and correcting for the LV radius over time. LV torsion was defined as the difference in LV rotation between the 2 levels. DTI rotational and torsional profiles throughout systole and diastole were compared with those by tagged MRI at isochronal points.

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Section: Advantage Of the Current Dti Methods For LV Torsion Assessmentmentioning

confidence: 99%

Assessment of Left Ventricular Torsional Deformation by Doppler Tissue Imaging

et al. 2005

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“…2D CINE gradient-echo-based tagging Myocardial tagging uses several RF pulses to presaturate thin planes of myocardium prior to imaging [29]. These saturation bands (tags) are supposed to persist in the myocardium throughout the entire heart cycle and, hence, can be used to track motion by acquiring images orthogonal to the presaturation pulses.…”

Section: D Cine Ssfp Imaging In Conjunction With Parallel Imagingmentioning

confidence: 99%

Influence of high magnetic field strengths and parallel acquisition strategies on image quality in cardiac 2D CINE magnetic resonance imaging: comparison of 1.5 T vs. 3.0 T

et al. 2005

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The aim of this paper is to examine signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and image quality of cardiac CINE imaging at 1.5 T and 3.0 T. Twenty volunteers underwent cardiac magnetic resonance imaging (MRI) examinations using a 1.5-T and a 3.0-T scanner. Three different sets of breath-held, electrocardiogram-gated (ECG) CINE imaging techniques were employed, including: (1) unaccelerated SSFP (steady state free precession), (2) accelerated SSFP imaging and (3) gradient-echo-based myocardial tagging. Two-dimensional CINE SSFP at 3.0 T revealed an SNR improvement of 103% and a CNR increase of 19% as compared to the results obtained at 1.5 T. The SNR reduction in accelerated 2D CINE SSFP imaging was larger at 1.5 T (37%) compared to 3.0 T (26%). The mean SNR and CNR increase at 3.0 T obtained for the tagging sequence was 88% and 187%, respectively. At 3.0 T, the duration of the saturation bands persisted throughout the entire cardiac cycle. For comparison, the saturation bands were significantly diminished at 1.5 T during end-diastole. For 2D CINE SSFP imaging, no significant difference in the left ventricular volumetry and in the overall image quality was obtained. For myocardial tagging, image quality was significantly improved at 3.0 T. The SNR reduction in accelerated SSFP imaging was overcompensated by the increase in the baseline SNR at 3.0 T and did not result in any image quality degradation. For cardiac tagging techniques, 3.0 T was highly beneficial, which holds the promise to improve its diagnostic value.

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“…Several reports of MRI findings in LVABS in the western population have been published so far [10][11][12][13][14][15], but none has focused on differentiating MR findings of LVABS with those of myocardial infarction. Cardiac MRI provides information on regional left ventricular function, and detailed regional perfusion can be evaluated using first-pass and delayed gadolinium-enhancement [16][17][18][19]. Thus, the purpose of our study was to determine whether cine steady-state free precession MRI, early first-pass perfusion and delayedenhancement MRI sequences can enable the differentiation of LVABS from acute myocardial infarction (AMI) in patients with acute chest pain.…”

Section: Introductionmentioning

confidence: 99%

MRI for the diagnosis of left ventricular apical ballooning syndrome (LVABS)

et al. 2008

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To compare MRI findings of left ventricular apical ballooning syndrome (LVABS) with those of acute myocardial infarction (AMI). Fifteen patients with a LVABS (group 1) and 25 patients with an AMI (group 2) were explored by MRI within 24 h after admission. Comparison of both groups for the number and location of myocardial segments with abnormal wall motion and abnormal perfusion or delayed enhancement was performed. The number of involved segments was higher in group 1 than in group 2 (p<0.001). In group 1, segments with abnormal wall motion were distributed in more than one vascular territory in all patients and confined to the medial, distal, and apical regions of the left ventricle. Subendocardial hypoenhancement was observed in 16/25 patients (64%) in group 2 and in none of group 1 (p<0.001). All patients in group 2 demonstrated delayed-enhancement abnormalities in a vascular distribution, whereas none in group 1 presented this abnormality (p<0.001). Diffusely distributed segmental wall-motion abnormalities and absence of first-pass perfusion hypoenhancement and of delayed enhancement at MRI help to differentiate LVABS from AMI. In the acute phase or in some difficult cases, cardiac MRI should become routine to confirm the diagnosis of LVABS.

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Advanced Cardiac MR Imaging of Ischemic Heart Disease

Cited by 49 publications

References 79 publications

Assessment of Left Ventricular Torsional Deformation by Doppler Tissue Imaging

Assessment of Left Ventricular Torsional Deformation by Doppler Tissue Imaging

Influence of high magnetic field strengths and parallel acquisition strategies on image quality in cardiac 2D CINE magnetic resonance imaging: comparison of 1.5 T vs. 3.0 T

MRI for the diagnosis of left ventricular apical ballooning syndrome (LVABS)

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