English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Background Exact quantification of aortic valve regurgitation is a challenge. Patients are typically asymptomatic and echocardiography is unreliable in certain conditions, particularly in eccentric regurgitation jets. Cardiac magnetic resonance (CMR) is a valuable alternative in this situation, but the use of conventional sequences without respiration correction is limited by motion artifacts and long acquisition times caused by necessary signal averaging. Novel navigator gated flow sensitive gradient echo sequence avoid motion artifacts caused by respiration and in addition allow for a higher temporal resolution eventually leading to more reliable results. Methods On 31 patients with varying degrees of aortic regurgitation we performed both standard (StdSeq) and navigator gated (NavSeq) flow sensitive gradient echo sequences. Primary parameter was the regurgitation fraction defined as the quotient of anterograde and retrograde flow over a cross section of the ascendent aorta just above the maximal excursion of the aortic leaflets. Since a gold standard for quantification of aortic regurgitation is missing, we correlated these values with the enddiastolic volume of the left ventricle (LVEDV) assessed by a contiguous stack short axis cine-SSFP sequences. This parameter is directly influenced by the regurgitant volume. For comparison we

Navigator gated flow sensitive gradient echo sequence for quantification of aortic valve regurgitation