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Comparison of strain parameters in dyssynchronous heart failure between speckle tracking echocardiography vendor systems

Although mechanical dyssynchrony parameters derived by speckle tracking echocardiography (STE) may predict response to cardiac resynchronization therapy (CRT), comparability of parameters derived with different STE vendors is unknown. In the MARC study, echocardiographic images of heart failure patients obtained before CRT implantation were prospectively analysed with vendor...

Comparison of strain parameters in dyssynchronous heart failure between speckle tracking echocardiography vendor systems

Although mechanical dyssynchrony parameters derived by speckle tracking echocardiography (STE) may predict response to cardiac resynchronization therapy (CRT), comparability of parameters derived with different STE vendors is unknown. In the MARC study, echocardiographic images of heart failure patients obtained before CRT implantation were prospectively analysed with vendor...

Comparison of strain parameters in dyssynchronous heart failure between speckle tracking echocardiography vendor systems

Although mechanical dyssynchrony parameters derived by speckle tracking echocardiography (STE) may predict response to cardiac resynchronization therapy (CRT), comparability of parameters derived with different STE vendors is unknown. In the MARC study, echocardiographic images of heart failure patients obtained before CRT implantation were prospectively analysed with vendor...

Evaluation of the use of unipolar voltage amplitudes for detection of myocardial scar assessed by cardiac magnetic resonance imaging in heart failure patients

in MUMC. Author Contributions Conceptualization: Uyên ChaÃu Nguyên, Francesco Maffessanti, Rolf Krause, Frits W. Prinzen, Kevin Vernooy. Data curation: Uyên ChaÃu Nguyên, Francesco Maffessanti ... , Masih Mafi-Rad, Giulio Conte, FrancËois Regoli, Maria Luce Caputo, Antonius M. W. van Stipdonk, Daniel Suerder, Kevin Vernooy, Angelo Auricchio. Formal analysis: Uyên ChaÃu Nguyên, Francesco Maffessanti

Comparison of strain imaging techniques in CRT candidates: CMR tagging, CMR feature tracking and speckle tracking echocardiography

Parameters using myocardial strain analysis may predict response to cardiac resynchronization therapy (CRT). As the agreement between currently available strain imaging modalities is unknown, three different modalities were compared. Twenty-seven CRT-candidates, prospectively included in the MARC study, underwent cardiac magnetic resonance (CMR) imaging and echocardiographic...

Why QRS Duration Should Be Replaced by Better Measures of Electrical Activation to Improve Patient Selection for Cardiac Resynchronization Therapy

Cardiac resynchronization therapy (CRT) is a well-known treatment modality for patients with a reduced left ventricular ejection fraction accompanied by a ventricular conduction delay. However, a large proportion of patients does not benefit from this therapy. Better patient selection may importantly reduce the number of non-responders. Here, we review the strengths and...

Animal Models of Dyssynchrony

Marc Strik 0 Lars B. van Middendorp 0 Kevin Vernooy 0 0 K. Vernooy Department of Cardiology, Maastricht University Medical Center , Maastricht, The Netherlands Cardiac resynchronization therapy

Vectorcardiography for Optimization of Stimulation Intervals in Cardiac Resynchronization Therapy

Current optimization of atrioventricular (AV) and interventricular (VV) intervals in cardiac resynchronization therapy (CRT) is time consuming and subject to noise. We aimed to prove the principle that the best hemodynamic effect of CRT is achieved by cancelation of opposing electrical forces, detectable from the QRS morphology in the 3D vectorcardiogram (VCG). Different degrees...

Mechano-energetics of the asynchronous and resynchronized heart

Abnormal electrical activation of the ventricles creates major abnormalities in cardiac mechanics. Local contraction patterns, as reflected by measurements of local strain, are not only out of phase, but often also show opposing length changes in early and late activated regions. As a consequence, the efficiency of cardiac pump function (the amount of stroke work generated by a...