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Four pigs, three with focal infarctions in the apical intraventricular septum (IVS) and/or left ventricular free wall (LVFW), were imaged with an intracardiac echocardiography (ICE) transducer. Custom beam sequences were used to excite the myocardium with focused acoustic radiation force (ARF) impulses and image the subsequent tissue response. Tissue displacement in response to the ARF excitation...
Acoustic Radiation Force (ARF)-driven shear wave velocimetry is a validated way of quantitatively measuring tissue elasticity. Open-chest velocimetry experiments have been able to measure regional myocardial contractility, a potentially useful diagnostic parameter for heart disease, but a clinically-viable method of making this measurement is needed. Intracardiac Echocardiography (ICE) catheter-tip...
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