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Does ECG-gated CT scan improve the detection of pannus formation in patients with mechanical aortic valves compared to traditional imaging?
Does ECG-gated CT scan improve the detection of pannus formation in patients with mechanical aortic valves compared to traditional imaging?
ECG-gated CT scanning is an effective imaging modality for detecting pannus formation and differentiating it from thrombus in mechanical aortic valves when traditional echocardiography is insufficient.
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Positions ECG-gated CT as a valuable adjunct when echocardiography is inconclusive for mechanical.
Obstruction of a mechanical aortic valve by pannus formation at the subvalvular level is a major long-term complication of aortic valve replacement (AVR). In fact, pannus is sometime difficult to differentiate from patient-prosthesis mismatch or valve thrombosis. In most cases cine-angiography and echocardiography, either transthoracic or transesophageal, cannot correctly visualize the complication when the leaflets show a normal mobility. Recent technological refinements made this difficult diagnosis possible by ECG-gated computed tomography (CT) scan which shows adequate images in 90% of the cases and can differentiate pannus from fresh and organized thrombus.
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Aladmawi et al. (2017) studied this question.
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