Abstract Objectives To test whether local hemolysis is a potential mechanism of saline-induced coronary hyperemia. Background Absolute flow can be measured by intracoronary continuous thermodilution saline through the lateral side holes dedicated infusion cathete. A rate at 15–20 mL/min induces an immediate, steady-state, maximal microvascular vasodilation. The this hyperemic response remains u...

Two intraocular phenomena folloiuing sympathetic denervation—degeneration mydriasis and degeneration hyperemia of the iris—were studied in conscious albino rabbits. The superior cervical ganglion was removed on one side (denervation) and the preganglionic sympathetic trunk was cut on the control side. Mydriasis and hyperemia toere judged by comparing the two eyes. Mydriasis started about 14.5 h...

Flow-mediated dilatation (FMD) of conduit arteries is dependent on an intact endothelium, although the mechanisms are not fully understood. Using high-resolution ultrasound, we examined the role of endothelial mediators in radial artery dilatation in response to transient (short period of reactive hyperemia) and sustained (prolonged period of reactive hyperemia, hand warming, or an incremental ...

BACKGROUND The present investigation was designed to elucidate the use of dynamic contrast enhanced perfusion MR imaging (DCE pMRI) in characterizing hyperemia, including microvessel changes, and to examine whether DCE pMRI can predict benign or malignant hyperemia. METHODS Sprague-Dawley rats underwent middle cerebral artery occlusion (MCAO) by intraluminal suture placement. All rats were ra...