Comparison of multidetector computed tomography versus echocardiography for assessing regional left ventricular...

Area of Science:

• Cardiovascular Imaging
• Radiology
• Cardiac CT Technology

Background:

• Multidetector computed tomography (MDCT) is primarily used for coronary artery assessment.
• MDCT's capability in evaluating ventricular function, specifically left ventricular segmental wall motion (LVSWM), is less explored.
• Echocardiography is the established gold standard for assessing LVSWM.

Purpose of the Study:

• To compare semiquantitative LVSWM scoring using MDCT against echocardiography.
• To determine the diagnostic performance of MDCT for LVSWM assessment.

Main Methods:

• Thirty-nine patients underwent 16-slice MDCT angiography.
• MDCT data were analyzed in cine mode using short- and long-axis views.
• Echocardiography was performed within 48 hours or 1 month post-MDCT.
• Two blinded observers scored LVSWM using the 16-segment model for both modalities.

Main Results:

• MDCT and echocardiography showed 82% identical segmental scores and 89% agreement in binary analysis (normal/abnormal).
• MDCT demonstrated high specificity (96%) but moderate sensitivity (66%) for detecting LVSWM compared to echocardiography.
• Disagreements were most frequent in segments supplied by the right coronary artery.

Conclusions:

• MDCT is a viable tool for evaluating LVSWM, exhibiting substantial agreement with echocardiography.
• The technique shows excellent specificity but requires further refinement for optimal sensitivity, especially in certain territories.
• MDCT offers a valuable alternative or adjunct for assessing ventricular wall motion abnormalities.