The RAC sign was seen in 31 patients (63.3%) with confirmed coronary anomalies and 3 (6.1%) with normal coronary anatomy. The sensitivity of the RAC sign was 63.3%, and the specificity was 93.9%. The Fisher exact test demonstrated a significant association between the RAC sign and the presence of a retroaortic anomalous coronary artery (p < 0.001).

2017年3月18日 · A matched control group with normal coronary arteries on CT was identified. TTE from both groups were reviewed by blinded investigators who indicated the presence of the sign in question, dubbed the RAC sign. These results were compared to …

2022年5月30日 · The retroaortic anomalous coronary (RAC) sign describes the sonographic appearance of an anomalous left coronary artery traveling posteriorly to the aortic root. It is most commonly observed with anomalous origin of the left circumflex artery from the right sinus of Valsalva, but is also described in cases with an anomalous left main coronary ...

Find out what is the full meaning of RAAC on Abbreviations.com! 'Recreational Abalone Advisory Committee' is one option -- get in to view more @ The Web's largest and most authoritative acronyms and abbreviations resource.

2 天之前 · RAAC was discovered in 77 properties in Hirwaun last year and 14 of these are owned by the residents who now face massive bills to deal with the issue. ... 'I've had stage four bowel cancer - the only sign was an everyday problem' Bowel cancer symptoms can be very common, including one that the NHS says is an every day problem. ...

2022年4月30日 · Recently described as the RAC sign on TTE, practitioners should be aware of this finding to avoid mistaken it as artifacts, catheters/leads, or calcified mitral annulus. Read more Article

Reinforced Autoclaved Aerated Concrete (RAAC), is a material that may have been used in the construction of buildings including schools, hospitals and other public sector buildings. This type of concrete differs from traditionally dense concrete and has been used as part of construction projects because of the material’s lightweight thermal ...

Spotting RAAC within a building requires a keen eye for detail and an understanding of what sets it apart from more traditional concrete. Here’s a more thorough breakdown of how to recognise RAAC in buildings: Look for the lightweights. RAAC panels are noticeably lighter than their conventional concrete counterparts.

2024年2月13日 · Reinforced Autoclaved Aerated Concrete has come under the spotlight in the past year with a series of failures of the material in public buildings such as schools and hospitals. In December 2023, the UK Government stated that 231 schools and colleges in England have crumbling concrete . RAAC has a life expectancy of 30 …

2023年9月11日 · What is RAAC? RAAC is a lightweight building material (“bubbly concrete”) that was used in flat roofing, floors and walls between the 1950s and 1990s, predominantly in municipal buildings. It was a cheaper alternative to standard concrete and also easier to install.