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Background: Although Doppler echocardiography is an established technique for the evaluation of LV diastolic function, it is known to be age dependent. Acoustic quantification (AQ) has shown promise for the evaluation of diastolic function. However, age related variations in AQ parameters have not been established. Accordingly, we studied the age dependency of AQ diastolic indices.Methods: Fifty...
Background: Transthoracic 3D echocardiography has recently become easier to perform with the use of a new internally rotating transducer (HP 21349A) that allows multiplane image acquisition at 3-6 MHz. However, these 3D images have not been compared with those obtained in the same patients using a transesophageal (TEE) multiplane probe.Methods: We screened 47 adult patients referred for clinical...
Background: Patients with dilated cardiomyopathy (DCM) have abnormal LV diastolic properties. However, mitral regurgitation (MR), commonly encountered in these patients, affects the indirect Doppler assessment of LV filling based on transmittal blood flow velocities. We hypothesized that Color Kinesis (CK), which allows direct quantification of the magnitude and timing endocardial motion can identify...
Background: Second harmonic imaging (SHI) is a novel echocardiographic technique developed to enhance imaging of contrast agents. We have observed that routine 2D images have improved endocardial definition with SHI. Our purpose was to determine whether SHI may improve the ability to interpret dobutamine stress echocardiography (DSE) on a segmental basis.Methods: Seventeen patients underwent DSE...
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