The Effects of Time Varying Curvature on Species Transport in Coronary Arteries

Alterations in mass transport patterns of low-density lipoproteins (LDL) and oxygen are known to cause atherosclerosis in larger arteries. We hypothesise that the species transport processes in coronary arteries may be affected by their physiological motion, a factor which has not been considered widely in mass transfer studies. Hence, we numerically simulated the mass transport of LDL and oxygen in an idealized moving coronary artery model under both steady and pulsatile flow conditions. A physiological inlet velocity and a sinusoidal curvature waveform were specified as velocity and wall motion boundary conditions. The results predicted elevation of LDL flux, impaired oxygen flux and low wall shear stress (WSS) along the inner wall of curvature, a predilection site for atherosclerosis. The wall motion induced changes in the velocity and WSS patterns were only secondary to the pulsatile flow effects. The temporal variations in flow and WSS due to the flow pulsation and wall motion did not affect temporal changes in the species wall flux. However, the wall motion did alter the time-averaged oxygen and LDL flux in the order of 26% and 12% respectively. Taken together, these results suggest that the wall motion may play an important role in coronary arterial transport processes and emphasise the need for further investigation

4-Bromo-2-(diethoxymethyl)phenyl benzoate

In the title compound, C18H19BrO4, the aromatic rings enclose a dihedral angle of 81.9 (7)°. There are no short directional contacts in the crystal structure

CARDIOVASCULAR RISK ASSOCIATED WITH ANDROGEN DEPRIVATION THERAPY IN ADVANCED PROSTATE CANCER

Cancer is a lethal disease that is the second leading cause of mortality in the world. According to statistics, prostate cancer is one of the most common types among men. Male hormone androgens, particularly testosterone, are required for normal growth and functioning of the prostate. In prostate cancer, activation of the androgen receptor promotes the growth of cancer cells. The goal of hormonal therapy or androgen deprivation therapy (ADT) is to reduce levels of such male hormones in the body or prevent them from stimulating cancer cells. There are many issues that have to be considered before initiation of hormonal therapy which are necessary to be aware of for its prevention and the management in routine clinical practices. In this review article, we emphasis on cardiovascular complications following ADT and certain treatment measures

Comparison of a PACS Workstation with Laser Hard Copies for Detecting Scaphoid Fractures in the Emergency Department

Picture archiving and communication systems (PACS) for imaging studies is rapidly being adopted in hospitals throughout the UK. However, very little comparison has been made between PACS and laser hard copies for assessing the diagnostic accuracy of detecting fractures by emergency physicians. A prospective paired comparison study was undertaken looking at correct reporting of scaphoid X-rays on PACS and conventional film by emergency department medical staff. A total of 34 imaging studies were reported by 38 physicians using both PACS workstations and laser-printed films. The percentage of emergency physicians correctly reporting imaging studies was similar when comparing PACS images to laser film copies (80.7% versus 81.0%). The sensitivity and specificity of PACS for diagnosing scaphoid fractures was 79.5% and 81.6%, versus 78.1% and 83.8% for conventional films. There is no significant difference in accuracy of diagnosis between PACS and laser film copies when scaphoid X-rays are reported by emergency physicians