1,721,175 research outputs found
[Evaluation of various psychologic parameters in a group of workers occupationally exposed to radiofrequency]
No full textIn this study effects on psyche caused by a protract exposure to radiofrequency are examined. 13 women, occupationally exposed to radiofrequency, were subjected to a series of psychological tests in order to verify possible psychological troubles. Results seem to demonstrate a significant presence of troubles concerning social relations, anxiety and depression
Contour tracking over image sequences
No full textAn automatic contour tracking procedure is illustrated over sequences of x-ray and echo images. The entire procedure is based on two main steps: (i) a furrow of suitable width is obtained at the image luminance variations by filtering the images with a first order derivative filter and (U) the "true" contour is obtained by dropping an approximate starting contour to the bottom of the furrow. Once the contour is determined on the first image it is used as starting contour to determine the contour on the subsequent image and so on. Therefore, when an approximate starting contour is given on the first image, every contour of the sequence is automatically outlined. As the gradient of Gaussian (GoG) provides a reduced output at two-dimensional discontinuities, a novel first order derivative filter is used to produce the furrow maps. The filter is obtained from the generalization of the first order absolute moment
Investigation into vanadate-induced potentiation of muscle contractility in the rabbit isolated ileum.
No full textMechanisms of vanadium toxicity were investigated in this study. It was shown that extracellular calcium is required for vanadate-induced smooth muscle excitation which, at least in part, appears to arise from facilitation of calcium influx through voltage-dependent calcium channels
Beneficial effect of intracoronary adenosine as an adjunct to primary PTCA in acute myocardial infarction
No full textIN PATIENTS WITH SYNDROME-X OR ESSENTIAL-HYPERTENSION, MYOCARDIAL UTILIZATION OF LACTATE AND PYRUVATE IS SIMILARLY IMPAIRED, BUT THROUGH DIFFERENT MECHANISMS
No full textnot availabl
Bronchial reactivity to methacholine in HIV-infected individuals without AIDS
No full textTo evaluate bronchial reactivity to methacholine in human immunodeficiency virus (W) infection, we submitted 25 HIV-seropositive subjects without full-blown AIDS and 25 HIV-seronegative subjects, all inmates in a drug rehabili- tation center for previous intravenous drug abuse, to interview and to bronchial challenge with methacholine. Four (16 percent) HIV-seropositive and three (12 percent) HIV-seronegative subjects noted bronchospastic symptoms. Baseline FEV, and MEF50 percent were within the normal range in every patient. Bronchial hyperreactivity to meth- acholine (PD20FEV,<1,400 pg) was found in two (8 per- cent) HIV-seropositive and in four (16 percent) HIV-sero- negative subjects, with no significant difference in the frequency between the two groups. We conclude that HIV infection without AIDS in intravenous drug users does not appear to be associated with an increased frequency of bronchospastic disorders and to bronchial hyperreactivity to methacholine
Il Sottoslivellamento del Segmento S-T da Sforzo E' Associato ad un Precoce Aumento della Frequenza Cardiaca e ad una Diminuita Efficienza Cardiovascolare Durante Sforzo nei Pazienti con Ipertensione Arteriosa e Senza Aterosclerosi Coronarica Significativa
No full textInfluence of Cardiovascular Risk Factors on Aortic Wall Motion After Repair of Type A Aortic Dissection: An Electrocar- diography-Gated Computed Tomography Study
Full text linkBackground: We aimed to evaluate size changes of the thoracic aorta during the cardiac cycle with dynamic computed tomographic angiography (CTA) at specific anatomic landmarks in patients who previously under- went ascending aorta repair because of type A dissec- tion, and to correlate aortic wall motion with several cardiovascular risk factors. Methods: From December 2008 to December 2010, 18 patients (14 men and 4 women, mean age 64 12 years) with previous aortic repair underwent electrocardiography-gated CTA fol- low-up. Aortic systolic and diastolic diameter and cross-sectional area were measured at 4 levels: 1 cm proximal (level A) and 1 (B), 3 (C), and 10 cm (D) distal to the origin of the left subclavian artery. Results were assessed according to age and presence of diabetes, hypertension, and smoking. Results: This morpho-functional evaluation of aortic wall motion demonstrated a significant influence (P < 0.05) of hy- pertension at level A and D and diabetes at level D. Smoking had a borderline significance at level C and D. No significant correlation with age was evident, with results not significantly different in patients < 55 and > 55 years. Conclusions: Smoking, diabetes, and hyper- tension play a role in impairing aortic size variations. These variations might predict wall structural altera- tions due to cardiovascular risk factors before they
become morphologically evident. This might influence timing of surveillance following repair of acute dissec- tion, allowing it to be specifically tailored for any single
subject
- …
