Cardiac Valve Dysfunction
Cardiac Valve Dysfunction - Related Videos
08:47
Culturing Mouse Cardiac Valves in the Miniature Tissue Culture System
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Cited by 10 •
2015
Here, we present an ex vivo flow model in which murine cardiac valves can be cultured allowing the study of the biology of the valve.
07:32
Analysis of Cardiac Contractile Dysfunction and Ca2+ Transients in Rodent Myocytes
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Cited by 2 •
2022
A set of protocols are presented that describe the measurement of contractile function via sarcomere length detection along with calcium (Ca2+) transient measurement in isolated rat myocytes. The application of this approach for studies in animal models of heart failure is also included.
09:13
Optimized Protocol for the Extraction of Proteins from the Human Mitral Valve
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2017
The protein composition of the human mitral valve is still partially unknown, because its analysis is complicated by low cellularity and therefore by low protein biosynthesis. This work provides a protocol to efficiently extract protein for the analysis of the mitral valve proteome.
11:37
Cardiac Magnetic Resonance Imaging
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2023
Source: Frederick W. Damen and Craig J. Goergen, Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana In this video, high field, small-bore magnetic resonance imaging (MRI) with physiological monitoring is demonstrated to acquire gated cine loops of the murine cardiovascular system. This procedure provides a basis for assessing left-ventricular function, visualizing vascular networks, and quantifying motion of organs due to respiration. Comparable small animal...
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.
FAQs
Stenosis primarily limits forward flow because the valve opening is narrowed, creating a pressure burden for the chamber behind it. Regurgitation allows blood to move backward when the valve does not close fully, producing a volume burden in that chamber. Distinguishing these patterns helps clinicians interpret the valve abnormality and its effect on overall cardiac performance.
The chamber behind the affected valve must accommodate the abnormal flow pattern. A narrowed valve increases the resistance to forward ejection and creates pressure overload, whereas incomplete closure sends blood backward and increases the volume handled by that chamber. These different hemodynamic stresses explain why the same broad diagnosis can produce different consequences for cardiac function.
Evaluation should determine which valve is affected and how substantially the abnormality changes blood flow through the heart. Echocardiography and other imaging can help measure the hemodynamic consequences, rather than merely showing that a structural change exists. This information supports assessment of cardiac performance and helps determine whether monitoring or intervention is appropriate.
Clinical assessment combines the patient’s symptoms with findings from physical examination, echocardiography, and other imaging when needed. These sources provide complementary information: symptoms indicate clinical impact, examination contributes bedside evidence, and imaging identifies the affected valve while measuring consequences for blood flow and cardiac performance. Together, they support a more individualized evaluation than any single test alone.
The documented valve abnormality and its hemodynamic consequences help determine the appropriate management pathway. Depending on the clinical situation, care may involve continued monitoring, medical treatment, catheter-based intervention, or surgical repair or replacement. The purpose of combining assessment with these options is to match treatment intensity to disease impact and reduce the risk of progressive cardiac deterioration.
Intervention becomes relevant when the valve abnormality and its effects indicate a need for more than observation or medical treatment. The available approaches include catheter-based procedures and surgical repair or replacement, selected according to the individual clinical situation. Timely decisions matter because appropriate management can help prevent progression toward heart failure while preserving a patient-specific care strategy.