Vasodilation
Vasodilation - Related Videos
07:46
Assessing Endothelial Vasodilator Function with the Endo-PAT 2000
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Cited by 165 •
2010
A noninvasive procedure to assess endothelial function is demonstrated using the Endo-PAT 2000.
01:23
Antihypertensive Drugs: Vasodilators
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2024
Vasodilators, primarily affecting the smooth muscles within arterial and venous walls, are commonly used for hypertension treatment. Medications such as minoxidil and hydralazine primarily target arteries and arterioles, while sodium nitroprusside acts on arterioles and venules. Minoxidil, functioning as a prodrug, is metabolized by hepatic sulfotransferase into its active form, minoxidil sulfate, after oral administration. This metabolite binds to the sulfonylurea receptor (SUR) component of...
08:09
Vasodilation of Isolated Vessels and the Isolation of the Extracellular Matrix of Tight-skin Mice
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Cited by 1 •
2017
We describe the isolation of cardiac extracellular matrix from C57Bl/6J control mice, tight-skin mice, and tight-skin mice treated with the IRF5 inhibitory peptide. We also describe the vasodilation studies on the isolated vessels from C57Bl/6J, tight-skin mice and tight-skin mice treated with the IRF5 inhibitory peptide.
08:42
Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
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Cited by 42 •
2014
Endothelial dysfunction is associated with numerous disease states and is predictive of adverse cardiovascular events in humans. Flow-mediated vasodilation (FMD) is a non-invasive ultrasound method of evaluating endothelial function. Methodological choices and operator experience may affect results. A systematic approach to FMD in human studies is discussed here.
08:22
Combined Intravital Microscopy and Contrast-enhanced Ultrasonography of the Mouse Hindlimb to Study Insulin-induced Vasodilation and Muscle Perfusion
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Cited by 4 •
2017
Insulin-induced vasodilation regulates muscle perfusion and increases the microvascular surface area (microvascular recruitment) available for solute exchange between blood and tissue interstitium. Combined intravital microscopy and contrast-enhanced ultrasonography is presented to simultaneously assess insulin's action at the larger vessels and the microcirculation in vivo.
FAQs
Endothelial-derived nitric oxide acts as a signal between the vessel lining and vascular smooth muscle. It activates intracellular pathways that reduce smooth-muscle contraction, allowing the vessel wall to relax. This mechanism links endothelial signaling to changes in vessel diameter and helps explain how local tissues can adjust their blood supply.
Relaxation of vascular smooth muscle increases the internal diameter of arteries and arterioles, reducing a major limitation on local blood delivery. The resulting perfusion change can improve oxygen and nutrient supply while supporting metabolic-waste removal. This makes smooth-muscle control central to matching circulation with the needs of tissues.
The consequences of vasodilation become especially important when tissues are active or warming. Increased local blood flow can support the demands of active tissue and help release heat from warming regions. These responses contribute to cardiovascular homeostasis by adjusting circulation to changing physiological conditions rather than maintaining a fixed distribution of blood flow.
During exercise, tissues have increased demands for oxygen and nutrient delivery and generate metabolic waste. Vasodilation is relevant because it can raise local perfusion, helping circulation support active tissue while facilitating waste removal. Studying this response allows biology researchers to connect vascular regulation with the broader cardiovascular adjustments associated with physical activity.
Changes in vessel diameter are important to blood-pressure regulation because they alter how readily blood can move through the vascular system. Investigating vasodilation therefore helps researchers examine cardiovascular homeostasis and identify how vascular control contributes to pressure regulation. Impaired control can be studied as a possible factor limiting effective circulation.
Vasodilation provides a useful framework for examining how vascular control changes during inflammation and disease. Inflammation is one biological context in which vascular responses are relevant, while impaired vasodilation can limit circulation in disorders involving abnormal vascular control. Research in these areas evaluates how altered vessel regulation affects tissue perfusion and cardiovascular function.