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Analysis of microvascularity after reperfused acute myocardial infarction using the maximum slope method of contrast-enhanced magnetic resonance imaging.
Radiat Med
June 2008
Department of Radiology, Prefectural Ehime Imabari Hospital, Imabari, Japan.
Purpose: The aim of this study was to analyze microvas-cularity after reperfused acute myocardial infarction (AMI) using the maximum slope method of contrastenhanced cardiac magnetic resonance imaging (CMR).
Materials And Methods: CMR and resting (201)T1 single photon emission computed tomography (SPECT) images were obtained in 30 consecutive patients after reperfused AMI and 10 controls. After bolus injection of gadolinium diethylenetriamine pentaacetic acid, first-pass CMR images were obtained using the True-FISP sequence.
[Myocardial viability assessment and perioperative cardiovascular evaluation using single photon emission tomography and positron emission tomography].
Kyobu Geka
July 2007
Department of Molecular Imaging, Hokkaido University Graduate School of Medicine, Sapporo, Japan.
Nuclear cardiology including single photon emission computed tomography (SPECT) and positron emission tomography (PET) can play important roles as myocardial viability assessment and perioperative cardiovascular evaluation for noncardiac surgery. Increasing prevalance of coronary artery disease (CAD) is associated with an increasing number of patients with heart failure secondary to CAD. Three main therapies, medical, revascularizations, and heart transplantation, are currently available.
View Article and Find Full Text PDFThallium-201 single-photon emission computed tomography: quantitative assessment of left ventricular perfusion and structural change in patients with chronic aortic regurgitation.
Clin Cardiol
December 2005
Division of Cardiovascular Surgery, Department of Surgery, Osaka University Graduate School of Medicine, Osaka, Japan.
Background: Previously, perfusion defect in the left ventricle was detected by thallium-201 (201T1) single-photon emission computed tomography (SPECT) in aortic regurgitation (AR). The significance of 201T1 SPECT, however, has not been clarified. Limited information is available regarding the relationship between functional characteristics and scintigraphic findings.
View Article and Find Full Text PDFAssessment of myocardial viability in patients with postischemic left ventricular dysfunction: role of myocardial contrast echocardiography.
Echocardiography
August 2003
Department of Cardiology, "La Sapienza" University, Rome, Italy.
The distinction between viable and nonviable dysfunctional left ventricular (LV) segments after acute myocardial infarction is very important, because revascularization increases survival only in patients with viable myocardial tissue. Recent studies have highlighted a mismatch between two highly specific investigations for viability assessment: dobutamine echocardiography, which measures inotropic reserve, and myocardial contrast echocardiography (MCE), which measures microvascular perfusion. Viability and functional reserve are not synonymous.
View Article and Find Full Text PDF[Assessment of left ventricular function by thallium-201 quantitative gated cardiac SPECT].
Kaku Igaku
February 2002
Department of Cardiovascular Medicine, Wakayama Medical University.
Purpose: Present study was designed to evaluate the accuracy of the measurement of left ventricular volume by quantitative gated SPECT (QGS) software using 201T1 and the effect of cutoff frequency of Butterworth prereconstruction filter on the calculation of volume.
Methods: The RH-2 type cardiac phantom and 20 patients with ischemic heart disease were studied. Left ventricular end-diastolic volume (EDV), end-systolic volume (ESV) and ejection fraction (EF) were calculated by the QGS software using the various frequency of Butterworth filter.
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