Aortic Pressure Control
Aortic Pressure Control - Related Videos
07:12
Design of a Cyclic Pressure Bioreactor for the Ex Vivo Study of Aortic Heart Valves
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Cited by 7 •
2011
A cyclic pressure bioreactor capable of subjecting heart valve tissue to physiological and pathological pressure conditions has been designed. A LabVIEW program allows users to control pressure magnitude, amplitude and frequency. This device can be used to study the mechanobiology of heart valve tissue or isolated cells.
10:18
Ascending Aortic Constriction in Rats for Creation of Pressure Overload Cardiac Hypertrophy Model
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Cited by 17 •
2014
We describe a stepwise procedure for creating pressure overload and left ventricular hypertrophy in Wistar rats by constriction of the ascending aorta using a small metallic clip. This model is extensively used for studying remodeling changes during cardiac hypertrophy and for identifying and evaluating strategies for regression of such changes.
09:12
Aortic Ring Assay
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Cited by 42 •
2009
Angiogenesis, the sprouting of blood vessels from pre-existing vasculature, is associated with both natural and pathological processes. Here we demonstrate an aortic ring assay that allows angiogenic potentiators and inhibitors to be directly added to aortic rings in culture. Sprouting and neovessel outgrowth can be determined by inspecting the aortic rings over a period of 6-12 days.
04:38
Transverse Aortic Arch Banding in Mouse Model: A Minimally Invasive Technique in Mice for Induction of High Pressure in the Left Ventricle
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2025
In this video, we demonstrate an experimental protocol for minimally invasive transverse aortic constriction in mice to examine pressure overload-induced heart failure.
12:17
Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots
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Cited by 4 •
2017
Full-root aortic valve replacement by stentless aortic xenograft is a viable option in patients with small aortic roots. We describe, a technique for the full-root implantation of stentless aortic xenografts, with emphasis on the management of the proximal suture line and coronary anastomoses, and discuss its limitations and alternative options.
FAQs
Stretch-sensitive baroreceptors in the aortic arch detect changes in pressure and signal the autonomic nervous system to modify cardiovascular activity. This feedback helps counter short-term rises or falls in pressure, supporting relatively stable blood flow to systemic organs. The response is therefore a rapid regulatory mechanism, whereas other systems provide more sustained control.
These variables influence aortic pressure through different aspects of circulation. Cardiac output affects the amount of blood entering the arterial system, systemic vascular resistance reflects opposition to flow, and arterial compliance determines how readily arteries accommodate pressure changes. Their interaction explains why altered cardiac performance, vascular tone, or arterial stiffness can produce different pressure patterns.
The kidneys and renin-angiotensin-aldosterone system support longer-term control by influencing blood volume and vascular tone. This complements the rapid baroreceptor response, which primarily adjusts autonomic activity after pressure changes. Because volume and vessel constriction affect the circulation over a longer period, renal regulation is important when pressure disturbances persist rather than resolve quickly.
Reduced arterial compliance, commonly described as increased vascular stiffness, limits the ability of arteries to accommodate changes in blood volume and pressure. As a result, the relationship between cardiac output and aortic pressure changes, increasing the workload imposed on the heart. Considering stiffness helps explain why pressure regulation may differ even when other circulatory variables appear similar.
Clinical interpretation should consider whether abnormal pressure reflects changes in cardiac output, arterial compliance, systemic vascular resistance, autonomic responses, or longer-term renal regulation. Hypertension and hypotension may therefore arise from different combinations of mechanisms. This framework helps clinicians connect a pressure finding with relevant influences such as vascular stiffness, fluid balance, medication effects, and cardiovascular disease.
Medications and fluid balance can alter the physiological factors that determine pressure, including vascular tone and blood volume. Their effects can interact with baroreceptor feedback and kidney-mediated regulation, producing short-term or longer-term changes in circulation. Understanding these relationships helps explain why treatment or fluid changes may influence both systemic organ perfusion and the heart's workload.