Aortic Constriction
Aortic Constriction - Related Videos
08:25
Transverse Aortic Constriction in Mice
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Cited by 262 •
2010
Transverse aortic constriction (TAC) in the mouse is a commonly used experimental model to study mechanisms underlying cardiac hypertrophy and heart failure development. Here, we describe procedures to constrict the aorta to create a reproducible degree of cardiac hypertrophy in mice.
07:40
Minimally Invasive Transverse Aortic Constriction in Mice
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Cited by 42 •
2017
Minimally invasive transverse aortic constriction (MTAC) conserves the essentials of regular transverse aortic constriction (TAC) while eliminating the use of a ventilator with tracheal intubation. It proves to be a highly desirable method for high-throughput studies on left ventricular overload, particularly in translational studies.
02:37
Surgical Aortic Debanding: A Procedure to Study Left Ventricular Reverse Remodeling in Murine Model of Aortic Constriction
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2025
This video demonstrates the technique of aortic debanding, which can lead to reverse remodeling to limit the progression towards heart failure in a murine model. Post debanding, a significant reduction of ventricular afterload triggers regression of ventricular hypertrophy and fibrosis, causing a recovery in cardiac function.
08:34
Technique of Minimally Invasive Transverse Aortic Constriction in Mice for Induction of Left Ventricular Hypertrophy
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Cited by 34 •
2017
The aim of this protocol is to describe step-by-step the technique of minimally invasive transverse aortic constriction (TAC) in mice. By elimination of intubation and ventilation which are mandatory for the commonly used standard procedure, minimally invasive TAC simplifies the operative procedure and reduces the strain put on the animal.
09:05
Assessment of Cardiac Morphological and Functional Changes in Mouse Model of Transverse Aortic Constriction by Echocardiographic Imaging
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Cited by 25 •
2016
The goal of this protocol is to noninvasively assess cardiac structural and functional changes in a mouse model of heart disease created by transverse aortic constriction, using B- and M-mode echocardiography and color/pulse wave Doppler imaging.
FAQs
Aortic constriction raises afterload, meaning the resistance the ventricle must overcome during ejection. The myocardium responds to this sustained mechanical demand by increasing ventricular muscle thickness, an adaptive change that can become maladaptive when pressure overload persists. This makes the model useful for linking vascular narrowing with structural cardiac remodeling.
Persistent pressure overload does more than increase ventricular wall thickness. Over time, continued mechanical stress can drive structural remodeling and may compromise the heart’s ability to function effectively. Studying this progression helps researchers examine how a response that begins with muscular thickening can become associated with impaired cardiac performance and heart failure.
The model permits investigation of molecular responses to sustained mechanical stress in cardiac tissue. Researchers can connect those responses with changes in ventricular structure, hypertrophy, and later functional impairment. This relationship provides a biological framework for studying how pressure overload alters the heart beyond the immediate increase in workload.
Transverse aortic constriction creates a controlled pressure-overload condition for studying cardiac disease mechanisms. By experimentally narrowing the aorta, investigators can examine how the heart responds to increased afterload and follow associated structural or functional changes. The approach is therefore used as a research model rather than simply as an observation of naturally occurring disease.
Studies using aortic constriction can evaluate cardiac hypertrophy, structural remodeling, and impaired function as pressure overload develops. These outcomes allow investigators to compare disease stages and connect visible changes in the ventricle with underlying molecular responses. The model also supports assessment of mechanisms that contribute to pressure-overload heart disease.
Aortic constriction is useful when a study aims to investigate pressure-overload heart disease or evaluate therapies directed at its mechanisms. Because the model links increased afterload with hypertrophy, remodeling, and possible functional decline, it provides a context for asking whether an intervention alters disease-related responses rather than only measuring an isolated molecular effect.