Aortic Valve Tissue
Aortic Valve Tissue - Related Videos
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.
08:55
Isolation and Characterization of Primary Rat Valve Interstitial Cells: A New Model to Study Aortic Valve Calcification
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Cited by 16 •
2017
This protocol describes the isolation, culture, and calcification of rat-derived valve interstitial cells, a highly physiological in vitro model of calcific aortic valve disease (CAVD). Exploitation of this rat model facilitates CAVD research in exploring the cell and molecular mechanisms that underlie this complex pathological process.
04:51
Isolation of Mouse Valve Interstitial Cells: An Enzymatic Method to Isolate and Culture VICs from Mouse Aortic Valve
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2025
In this video, we demonstrate the isolation of aortic valve interstitial cells from the heart of an adult mouse using a two-step collagenase procedure and their subsequent culture in low volume of growth media.
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.
02:52
Calcification Assay to Measure Calcium Concentration in Aortic Valve Interstitial Cells
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2025
This video demonstrates an assay technique for assessing the calcification of the aortic valve interstitial cells in vitro. The assay helps to quantify the calcium concentration using the arsenazo III reagent, a calcium-sensitive dye that reacts with calcium ions to form a purple-colored calcium-arsenazo complex.
FAQs
Anisotropy means that aortic valve tissue does not respond identically in every direction. This directional dependence helps the leaflets combine flexibility with resistance to pressure during the cardiac cycle. In physics and biomechanics, measuring direction-specific stress and strain clarifies how the tissue opens during ventricular contraction, tolerates loading, and returns to a configuration that supports effective closure.
The layered organization of aortic valve tissue contributes to its mechanical response by combining fibrous and elastic characteristics. Collagen and elastin help produce behavior that is both load-bearing and flexible, rather than purely rigid or purely extensible. Studying these structural features allows researchers to connect tissue composition with leaflet deformation, pressure tolerance, and the ability to coapt during relaxation.
Stress describes the forces carried within the tissue, whereas strain describes how much the tissue deforms under those forces. Examining both quantities shows how aortic valve tissue responds to changing mechanical loads. These measurements provide parameters for biomechanical analysis and help researchers evaluate whether physical models represent leaflet motion, pressure resistance, and closure behavior realistically.
Fluid-structure interaction examines the mutual influence between blood flow and moving valve tissue. Blood pressure and flow affect leaflet deformation, while leaflet motion changes the passage available for flow and the conditions associated with closure. Including this interaction in cardiovascular models produces a more physically relevant account of valve function than analyzing tissue motion or fluid behavior independently.
A study may examine leaflet stress, strain, elasticity, anisotropic response, and interactions between tissue motion and cardiovascular flow. The goal is to relate measurable mechanical behavior to functional events such as opening under ventricular contraction and coaptation during relaxation. These analyses support models that describe how the valve responds to the changing physical conditions of the heartbeat.
Mechanical measurements provide benchmarks for assessing whether prosthetic or tissue-engineered valves reproduce important characteristics of native tissue. Researchers can compare stress, strain, elasticity, and flow-related behavior when designing or testing replacements. Continued evaluation also helps address long-term performance, because a candidate valve must function under the mechanical and fluid conditions represented in cardiovascular models.