Journal of the American Society of Echocardiography
Original articleAccuracy and Feasibility of Online 3-Dimensional Echocardiography for Measurement of Left Ventricular Parameters
Section snippets
Study Design
We prospectively recruited 117 patients (94 men, age 63 ± 10 years) referred to the echocardiography laboratory for measurement of LV volume and EF. All of these patients were scheduled to undergo 2DE, 3DE, and MRI. The investigations were approved by the ethics committee and all patients gave informed consent.
2DE
An experienced sonographer acquired apical 4- and 2-chamber views of the LV with the patient in the left lateral decubitus position. Harmonic imaging with a transthoracic 3-MHz
Patient Characteristics
Results of MRI, 3DE, and 2DE were analyzed in 110 patients (94 men, age 63 ± 10 years). 7 patients were excluded because of poor image quality on one or more modality. Table 1 summarizes the clinical characteristics, and presence and cause of LV dysfunction; the majority had regional wall-motion abnormalities.
Feasibility of Online 3DE
One patient of the 117 (99%) could not be measured by 2DE because of image quality. We found that 97% were measurable with offline 3DE, and 94% with online 3DE. The 7 patients who could
Discussion
The results of this study indicate that online 3D imaging is a feasible approach for measuring LV parameters. Nonetheless, offline 3DE had a better correlation with less variation from MRI followed by online 3DE, then 2DE. Image quality did not explain the differences between each of the 3DE techniques and MRI.
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