ABSTRACT
We aimed to investigate the impact of chronic obstructive pulmonary disease (COPD) exacerbation on cerebral blood flow (CBF). In 21 COPD patients - in both exacerbation and stable phases -Doppler ultrasonographies of internal carotid artery (ICA) and vertebral artery (VA) were performed. There were significant differences in total, anterior and posterior CBF, ICA and VA flow volumes in exacerbated COPD compared to stable COPD. Total CBF was correlated with cross-sectional areas of left and right ICA, whereas independent predictor of total CBF was cross-sectional area of right ICA. Increased CBF might indicate cerebral autoregulation-mediated vasodilatation to overcome COPD exacerbation induced hypoxia.
Subject(s)
Carotid Artery, Internal/physiopathology , Cerebrovascular Circulation , Hypoxia, Brain/etiology , Hypoxia, Brain/physiopathology , Pulmonary Disease, Chronic Obstructive/complications , Pulmonary Disease, Chronic Obstructive/physiopathology , Vertebral Artery/physiopathology , Blood Flow Velocity , Carotid Artery, Internal/diagnostic imaging , Humans , Hypoxia, Brain/diagnostic imaging , Male , Middle Aged , Pulmonary Disease, Chronic Obstructive/diagnostic imaging , Ultrasonography , Vertebral Artery/diagnostic imagingABSTRACT
Anatomical variations of carotid arterial system, which are not infrequently encountered, have great impact on the surgical approaches of the neck. Although few reports on common carotid artery tortuosity have been published, no case of symptomatic concurrent common carotid and internal carotid artery tortuosity has been reported. Herein, we report the first case with concurrent common origin of the innominate trunk and left common carotid artery and common and internal carotid artery tortuosity presenting with an oropharyngeal mass.
Subject(s)
Brachiocephalic Trunk/abnormalities , Carotid Artery, Internal/abnormalities , Humans , Male , Middle Aged , Oropharynx/abnormalitiesABSTRACT
This study was carried out in order to determine nitric oxide (NO) production immediately after a 1.5 T magnetic field 30 min exposure to an experimental group, comprising 33 healthy young male volunteers aged 18-26 years old. In addition, a control group, comprising 30 healthy male volunteers aged 19-26 years old, was not exposed to the magnetic field and their NO levels were also measured. The experimental group was exposed using a magnetic resonance imaging (MRI) apparatus. Nitrite and nitrate concentrations were determined by UV-VIS spectrophotometer. The results, related to the parameters measured in this study, were analyzed by one-way ANOVA. Total nitrite concentration in post-magnetic field samples was found to be higher than in pre-magnetic field samples (P < .05).
