By the use of simple clamps, a segment of a forearm vein was temporarily isolated from the circulation so that change in pressure within the segment measured change in venous tone. Reflex venoconstriction was elicited by appropriate stimuli. These reactions could be blocked by interruption of the sympathetic pathway to the vein under study. The magnitude of the responses obtained supports the c...

The avian lung has a highly sophisticated morphology with a complex vascular system. Extant data regarding avian pulmonary angioarchitecture are few and contradictory. We used corrosion casting techniques, light microscopy, as well as scanning and transmission electron microscopy to study the development, topography, and distribution of the parabronchial vasculature in the chicken lung. The art...

Indocyanine green (ICG) fluorography which is used to visualize the arteries, veins, and lymphatic vessels through the skin surface has recently been developed. This article includes an overview of our clinical experiences as well as descriptions of the latest knowledge on the utilization of ICG fluorography in the fields of plastic surgery and microvascular surgery. Imaging of the Capillary Bl...

Many cases of patients who have died from air embolism during surgical operations have been reported, and in some of these the mode of death has suggested a cerebral lesion, but in very few have the brains been carefully examined at necropsy. As a result there is at present a state of uncertainty as regards the nature and pathology of cerebral air embolism. Bohorfoush (1943) described finding "...

This is a third part of tripartite morphometric data of the pig coronary blood vessels, giving a complete quantitative description of the arterial tree [Kassab et al., Am. J. Physiol. 265 (Heart Circ. Physiol. 34): H350-H365, 1993], capillary network [Kassab and Fung, Am. J. Physiol. 267 (Heart Circ. Physiol. 36): H319-H325, 1994], and venous tree (this article). Together they provide the quant...

The forelimb was used to study capillary fluid fluxes following hemorrhage in dogs anesthetized with sodium pentobarbital. Arterial hemorrhage (48 ml/kg) and 4 hours of hypovolemia produced decreases in forelimb weight, arterial and venous pressures, and skin and skeletal muscle blood flows. Segmental resistances (large artery, small vessel, large vein) in both skin and skeletal muscle increase...

BACKGROUND AND PURPOSE To study hemodynamic changes and to determine the value of contrast-enhanced transcranial color-coded sonography (TCCS) for the evaluation of dural arteriovenous fistulae (DAVF) before and after transcatheter embolization. METHODS Twenty-four patients (mean age 61+/-11 years) with occipitally located DAVF were studied with contrast-enhanced TCCS using the transtemporal ...

Stretch of the vascular wall by the intraluminal blood pressure stimulates protein synthesis and contributes to the maintenance of the smooth muscle contractile phenotype. The expression of most smooth muscle specific genes has been shown to be regulated by serum response factor and stimulated by increased actin polymerization. Hence we hypothesized that stretch-induced differentiation is promo...