Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography
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J Am Soc Echocardiogr · Jan 2007
The assessment of left ventricular twist in anterior wall myocardial infarction using two-dimensional speckle tracking imaging.
Two-dimensional speckle tracking imaging allows noninvasive measurement of left ventricular (LV) strain, rotation, and displacement. We investigated whether LV twist would be depressed in anterior wall myocardial infarction (MI) as a result of reduced apical rotation. ⋯ Systolic twist was decreased and diastolic untwisting was depressed in accordance with LV systolic dysfunction in anterior wall MI. These results suggest the significant impact of global LV systolic function on LV twist and twist-displacement loops in patients with anterior wall MI.
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J Am Soc Echocardiogr · Jan 2007
Comparative StudyThree-dimensional versus two-dimensional transesophageal echocardiography in mitral valve repair.
We sought to compare the diagnostic performance of 3-dimensional (3D) versus 2-dimensional (2D) echocardiography in patients with regurgitant mitral valve. ⋯ Three-dimensional echocardiography offers high accuracy in mitral valve evaluation. It may complement 2D study in patients with complex valve anatomy, where surgical decisions are more difficult. The images can be easily interpreted by professionals without a high degree of experience.
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J Am Soc Echocardiogr · Dec 2006
Asynchrony of left ventricular systolic performance after the first acute myocardial infarction in patients with narrow QRS complexes: Doppler tissue imaging study.
Left ventricular (LV) electromechanical delay results in asynchronized contraction. However, it is not known if the presence of cardiac diseases without QRS prolongation may result in interventricular or intraventricular asynchrony. Doppler tissue imaging is now established for detecting regional contractile abnormalities and asynchrony in the LV. ⋯ AMI has a significant impact on regional myocardial contractility and LV systolic (but not diastolic) synchronicity early in the course even in the absence of QRS widening or bundle branch block. The degree of LV systolic asynchrony is greater with anterior than inferior AMI and mainly determined by infarct size.
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J Am Soc Echocardiogr · Dec 2006
Comparative StudyReal-time simultaneous triplane contrast echocardiography gives rapid, accurate, and reproducible assessment of left ventricular volumes and ejection fraction: a comparison with magnetic resonance imaging.
We sought to compare the feasibility, accuracy, and reproducibility of simultaneous triplane echocardiography for measurements of left ventricular (LV) volumes and ejection fraction (EF) with reference to magnetic resonance imaging (MRI). ⋯ Simultaneous LV triplane imaging is feasible with simple and rapid image acquisition and volume analysis, and with contrast enhancement it gives accurate and reproducible LV EF measurements compared with MRI.