This study sought to develop a novel echocardiogram outflow ramp test to detect device malfunctions in centrifugal-flow left ventricular assist devices (LVADs). This new ramp pump test is based on the direct analyses of systolic and diastolic ratio (S/D) Doppler velocity in the outflow cannula in the HeartWare LVAD during progressive increases in speed. The results showed that in patients with normal pump function, the Doppler velocity S/D ratio gradually decreased during LVAD speed increases. This test is easily performed and seems promising to detect normal pump function in patients assisted by a centrifugal flow LVAD.
Echocardiographic outflow pump ramp test in centrifugal-flow left ventricular assist device / Iacovoni, A; Vittori, C; Fontana, A; Carobbio, A; Fino, C; D'Elia, E; Terzi, A; Senni, M. - In: THE INTERNATIONAL JOURNAL OF ARTIFICIAL ORGANS. - ISSN 1724-6040. - 40:3(2017), pp. 128-131. [10.5301/ijao.5000573]
Echocardiographic outflow pump ramp test in centrifugal-flow left ventricular assist device
Carobbio A;
2017
Abstract
This study sought to develop a novel echocardiogram outflow ramp test to detect device malfunctions in centrifugal-flow left ventricular assist devices (LVADs). This new ramp pump test is based on the direct analyses of systolic and diastolic ratio (S/D) Doppler velocity in the outflow cannula in the HeartWare LVAD during progressive increases in speed. The results showed that in patients with normal pump function, the Doppler velocity S/D ratio gradually decreased during LVAD speed increases. This test is easily performed and seems promising to detect normal pump function in patients assisted by a centrifugal flow LVAD.
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