Pressure Overload
Pressure Overload - Related Videos
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.
06:47
A Pulmonary Trunk Banding Model of Pressure Overload Induced Right Ventricular Hypertrophy and Failure
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Cited by 23 •
2018
We present a surgical method to induce right ventricular hypertrophy and failure in rats.
07:26
Synthesis and Microdiffraction at Extreme Pressures and Temperatures
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Cited by 5 •
2013
The laser heated diamond anvil cell combined with synchrotron micro-diffraction techniques allows researchers to explore the nature and properties of new phases of matter at extreme pressure and temperature (PT) conditions. Heterogeneous samples can be characterized in situ under high pressure by 2D mapping and combined powder, single-crystal and multigrain diffraction approaches.
04:49
A Murine Model of Pressure Overload-Induced Right Ventricular Hypertrophy and Failure by Pulmonary Trunk Banding
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2024
We describe a murine model of right ventricular pressure overload-induced by pulmonary trunk banding. Detailed protocols for intubation, surgery, and phenotyping by echocardiography are included in the paper. Custom-made instruments are used for intubation and surgery, allowing for fast and inexpensive reproduction of the model.
09:24
O-Ring Aortic Banding Versus Traditional Transverse Aortic Constriction for Modeling Pressure Overload-Induced Cardiac Hypertrophy
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Cited by 1 •
2022
The present protocol describes a new technique of aortic banding in mice to induce pressure overload cardiac hypertrophy. For banding, a rubber ring with a fixed inner diameter is used. This new technique promises less variance and more reproducible data for future experiments.
FAQs
Greater resistance to blood flow raises the force the ventricle must generate for each contraction. Mechanosensitive signaling detects this mechanical stress and alters gene expression, which promotes ventricular wall thickening. This remodeling helps the heart maintain output while the increased load persists, linking a hemodynamic change to a cellular adaptation.
Mechanosensitive signaling converts increased mechanical force into cellular information. In pressure overload, that information influences gene expression and contributes to changes in ventricular structure. This pathway is important because it explains how the heart responds to altered hemodynamic conditions rather than treating wall thickening as an isolated anatomical change.
Wall thickening can initially help the ventricle generate the force needed to maintain output, but prolonged remodeling has different consequences. Sustained pressure overload may reduce ventricular compliance, meaning the chamber becomes less able to expand, and may impair relaxation. These changes can progressively compromise cardiac performance and contribute to heart failure.
Hypertension and valve disorders are important contexts in which the heart may face increased resistance to blood flow. Studying these conditions allows researchers to relate the initiating hemodynamic force to mechanosensitive signaling, altered gene expression, structural remodeling, and later functional impairment. This connection supports investigation of both disease progression and intervention strategies.
研究 focuses on connecting increased hemodynamic forces with cellular adaptation and disease progression. Investigators examine the relationship between mechanical stress, signaling responses, gene-expression changes, ventricular wall remodeling, compliance, and relaxation. This framework helps organize observations across molecular, structural, and functional levels without treating any single finding as the complete outcome.
Research can support the evaluation of diagnostic markers, therapeutic strategies, and interventions relevant to hypertension or valve disorders. Outcomes of interest include the remodeling response that initially preserves cardiac output and the later changes associated with reduced compliance, impaired relaxation, and heart failure. These links help assess whether an intervention addresses both adaptation and deterioration.