- Poster presentation
- Open Access
Post-surgical hemodynamics in aortic valve bypass (AVB) patients evaluated with phase contrast magnetic resonance (PCMR)
© Lam et al; licensee BioMed Central Ltd. 2012
- Published: 1 February 2012
- Aortic Valve
- Aortic Stenosis
- Thoracic Aorta
- Prosthetic Valve
- Retrograde Flow
20 patients were included in this study. Mean pressure gradient across the aortic valve pre-surgery (ΔP) was determined with Doppler ultrasound using the modified Bernoulli equation. Patients underwent an MRI post-surgery, and PCMR images were acquired along the aorta and in the graft conduit at 5 locations, Fig 1.
While much patient-to-patient variability exists in the flow patterns post AVB surgery, retrograde blood flow in the descending thoracic aorta is related to pre-surgery aortic valve gradient. This relationship may help with future patient selection, as patients with pre-surgery native aortic valve pressure gradient >40 mmHg will most likely have retrograde flow supplying the arch vessels.
This project was funded by the NIH T32 Training Grant.
This article is published under license to BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.