跳至主要内容

The Impact of the Morphologic Characteristics of Type B Aortic Dissection in the Acute Phase on the Aortic Enlargement in the Late Stage

The aorta is the largest artery in the body. It begins at the top of the left ventricle, the heart’s muscular pumping chamber. An aortic dissection (AD) is a serious condition in which the inner layer of the aorta tears. Blood surges through the tear, causing the inner and middle layers of the aorta to separate (dissect). It usually occurs in a weakened area of the aortic wall and is often a life-threatening condition and represents one of the rare true emergencies in cardiac surgery.  There are two kinds of aortic dissections (Type A and Type B). The difference is where the dissection is located.

The objective of this study was to investigate the morphologic characteristics of aortic enlargement in type-B AD. A total of 120 patients with uncomplicated acute type-B aortic dissection (uATBAD) were divided into 4 groups (PE, PU, TE, and TU) according to the presence of a patent or thrombosed false lumen (FL) with or without aortic enlargement. In all groups, the area of the true lumen (TL) and the FL were measured on axial computed tomography images. Image analysis was performed on a SYNAPSE VINCENT system (Tokyo Japan, FUJIFILM Holding Corporation) with a dedicated 3D image analyzer.

A total of 120 uATBAD patients were evaluated: patent FL with (PE, N = 28, 23%) or without aortic enlargement (PU, N = 17, 14%) and thrombosed FL with (TE, N = 34, 28%) or without enlargement (TU, N = 41, 34%). The initial aortic diameter was not significantly different among the 4 groups (PE vs. PU = 39 ± 8 vs. 37 ± 10 (p = 0.354); TE vs. TU = 38 ± 6 vs. 37 ± 6 (p = 0.391)). The area of the FL tended to be larger in the PE group. In contrast, the area of the TL was significantly larger in the TE group. Late outcomes of uATBAD treated with optimal medical treatment were acceptable.

In conclusion, in patients with uATBAD and a thrombosed FL, the patients with aortic enlargement tended to be increased TL size. In contrast, in patients with a patent FL, the patients with aortic enlargement tended to be increased FL size.

Article by Ken Nakamura, et al, from Yamagata University, Yamagata, Japan.

Full access: http://t.cn/E585JMm

评论

发表评论

此博客中的热门博文

Electron Spin and Proton Spin in the Hydrogen and Hydrogen-Like Atomic Systems

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52202#.VIj7tMnQrzE Author(s) Stanisław Olszewski * Affiliation(s) Institute of Physical Chemistry, Polish Academy of Sciences, Warsaw, Poland . ABSTRACT The mechanical angular momentum and magnetic moment of the electron and proton spin have been calculated semiclassically with the aid of the uncertainty principle for energy and time. The spin effects of both kinds of the elementary particles can be expressed in terms of similar formulae. The quantization of the spin motion has been done on the basis of the old quantum theory. It gives a quantum number n = 1/2 as the index of the spin state acceptable for both the electron and proton ...
发表评论
阅读全文

Incorporation of High-Altitude Balloon Experiment in High School Science Classrooms

High-altitude balloon is a balloon, filled usually with helium or hydrogen that ascends into an area called “near space” or stratosphere. The most common type of high-altitude balloons are weather balloons. Other purposes include use as a platform for experiments in the upper atmosphere. Modern balloons generally contain electronic equipment such as radio transmitters, cameras, or satellite navigation systems, such as GPS receivers. The mission of the High-Altitude Balloon Experiment (HABE) is to acquire supporting data, validate enabling technologies, and resolve critical acquisition, tracking, and pointing (ATP) and fire control issues in support of future space-based precision pointing experiments. The use of high-altitude balloons offers a relatively low-cost, low-vibration test platform, a recoverable and reusable payload, worldwide launch capability, and a 'near- space' emulation of the future space systems operational scenarios. More recently, several university...
1 条评论
阅读全文

An Empirical Study on Microbial Load and Acidity in Raw Milk Produced in Malayer and Nahavand Cities, Iran 2012

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=49618#.VBk-qVfHRK0 An Empirical Study on Microbial Load and Acidity in Raw Milk Produced in Malayer and Nahavand Cities, Iran 2012 Author(s) Mohammad Rezaei , Ali Asghar Behzadi , Ali Akbar Malekirad , Ahmad Fattahi , Mohamad Hadi Farahzadi , Mohammad Sarmadi , Hasan Mohammadi Aghamirlou , Reza Ali Fallahzadeh Affiliation(s) Department of Food Safety and Hygiene, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran . Department of Food Safety and Hygiene, School of Health, Yazd University of Medical Sciences, Yazd, Iran . Department of Biology, Payame Noor University, Tehran, Iran . Department of Occupational Health Engineering, School of Health, Shahid Sadoughi University of Medical Sci-ences, Yazd, Iran . Department...
发表评论
阅读全文