![]() ![]() ![]() We examined right and left vertebral arteries in all of volunteers and therefore 192 arteries were examined (80 in group A, 96 in group B). These patients were subdivided in two groups: in groups A, 40 patients younger than 60 year old were studied (age range: 23–57 years, mean age: 36.25 years) including 26 males and 14 females, in group B, 56 patients older than 60 years were examined (age range: 60–95 years, mean age: 69.21 years) including 32 males and 24 females. The youngest patient was 23 year old and the oldest one was 95 year old (age range: 23–95 years). In this prospective study, from June 2005 to June 2006, using a 7.5 MHZ linear transducer of a Hitachi EUB 525 system, we examined vertebral arteries in 96 volunteers. Considering these contraversial findings, we decided to compare blood flow and duplex indices of vertebral arteries in volunteers younger and older than 60 year old to clarify the effect of aging in vertebrobasilar circulation. ![]() Muller and coworkers and also Martin have been shown a significant decrease in basilar and vertebral arteries flow velocities with increasing of age, but in someother studies there was not any significant difference in diameters, velocities and flow volumes of vertebral arteries with aging. Ĭorttical and subcortical atrophy in the elderly may be more relevant for carotid flow volume than for the vertebral system because the brain stem is not so much affected by the aging process. With increasing age, due to brain atrophy, oxygen demand and total cerebral blood Flow decrease. The brain is supplied directly by four vessels: the two internal carotid and two vertebral arteries.ĭoppler ultrasound is an established technique for evaluating extracranial portion of carotids and vertebral arteries in patients with manifested or suspected cerebrovascular diseases, not only for screening but also for preoperative assessment. The vascular system of human brain differs from other organs in the body, although it accounts for only 2% of the body weight, the brain receives 15% of the body oxygen supply in the basal state. ![]()
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