Left Atrium Bypass
Left Atrium Bypass - Related Videos
08:17
Murine Echocardiography of Left Atrium, Aorta, and Pulmonary Artery
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Cited by 8 •
2017
The following protocol describes the methodology for the acquisition and analysis of echocardiographic images used to obtain the Left Atrial Volume (LAV), Aorta (Ao) diameter, and Pulmonary Artery (PA) diameter in mice. This technique is a non-invasive, non-terminal procedure that allows assessment of the cardiopulmonary function.
07:39
Use of a Percutaneous Ventricular Assist Device/Left Atrium to Femoral Artery Bypass System for Cardiogenic Shock
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Cited by 1 •
2021
The following article describes the stepwise procedure for placement of a device (e.g., Tandemheart) in cardiogenic shock (CS) that is a percutaneous left ventricular assist device (pLVAD) and a left atrial to femoral artery bypass (LAFAB) system that bypasses and supports the left ventricle (LV) in CS.
08:08
Cardiopulmonary Bypass in a Mouse Model: A Novel Approach
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Cited by 9 •
2017
This paper describes how to perform cardiopulmonary bypass in mice. This novel model will facilitate the investigation of the molecular mechanisms involved in organ damage.
04:29
Three-Dimensional Modeling of the Left Atrium and Pulmonary Veins with a Precise Intracardiac Echocardiography Approach
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2023
Accurate intracardiac echocardiography (ICE) shows significant accuracy in estimating the left atrial structure, a prospective and promising cardiac structure estimation method. Here we propose a protocol for three-dimensional modeling of the left atrium and pulmonary veins with ICE and fast anatomical mapping (FAM) catheter remodeling.
07:37
Roux-en-Y Gastric Bypass Operation in Rats
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Cited by 45 •
2012
Numerous studies using gastric bypass rat models have been recently conducted to uncover the underlying physiological mechanisms of Roux-en-Y gastric bypass operations. This article aims to demonstrate and discuss the technical and experimental details of our published gastric bypass rat model to understand advantages and limitations of this experimental tool.
FAQs
The system withdraws blood from the left atrium before it reaches the left ventricle, reducing ventricular preload, or the volume the ventricle must handle. An external pump then returns that blood to the aorta, allowing systemic blood flow to continue while decreasing the impaired ventricle’s pumping burden.
Pump flow must be managed to provide adequate systemic circulation without disrupting the intended unloading of the left ventricle. The central goal is to maintain blood delivery to organs while the external circuit supports circulation. Careful control therefore links ventricular unloading with preservation of systemic perfusion.
Blood entering the left atrium has already been oxygenated and is positioned for delivery through the systemic circulation. Withdrawing it provides the external pump with blood that can be directed into the aorta, supporting organ perfusion without depending entirely on the weakened left ventricle’s forward output.
The main pathway requires a cannula positioned to withdraw blood from the left atrium, an external pump to propel it, and a return route into the aorta. Together, these components create a circuit that diverts flow around the left ventricle while continuing delivery to the systemic circulation.
Anticoagulation and vascular access require careful management because they are central to using the external circulatory circuit safely. The source identifies both as areas requiring attention to limit complications. Their management forms part of the overall support procedure rather than being separate from the bypass strategy.
This approach may be considered when severe left-sided heart failure or cardiogenic shock prevents the heart from maintaining adequate circulation. It can provide temporary hemodynamic assistance, meaning support for circulation, while clinicians evaluate whether the patient can recover or needs longer-term mechanical support or transplantation.