Cardiac Tamponade
Cardiac Tamponade - Related Videos
08:25
Visualization of Streptococcus pneumoniae within Cardiac Microlesions and Subsequent Cardiac Remodeling
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Cited by 11 •
2015
Streptococcus pneumoniae forms discrete non-purulent microscopic lesions in the heart. Outlined is the protocol for a murine model of cardiac microlesion formation. Instruction is provided on microlesion visualization using microscopy, discrimination between early and late microlesions, and methods to detect cardiac remodeling in hearts of convalescent animals.
15:45
Cardiac Stress Test Induced by Dobutamine and Monitored by Cardiac Catheterization in Mice
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Cited by 11 •
2013
We describe the protocol to perform a cardiac stress test induced by dobutamine and monitored by cardiac catheterization in normal mice. Also we show its application to unmask subclinical cardiac disease in high fat diet-induced obese mice.
04:40
Creation of Cardiac Tissue Exhibiting Mechanical Integration of Spheroids Using 3D Bioprinting
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Cited by 55 •
2017
This protocol describes 3D bioprinting of cardiac tissue without the use of biomaterials. 3D bioprinted cardiac patches exhibit mechanical integration of component spheroids and are highly promising in cardiac tissue regeneration and as 3D models of heart disease.
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...
07:39
Cardiac Exam I: Inspection and Palpation
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2023
Source: Suneel Dhand, MD, Attending Physician, Internal Medicine, Beth Israel Deaconess Medical Center The cardiac assessment is one of the core examinations performed by almost every physician whenever encountering a patient. Disorders of the cardiac system are among the most common reasons for hospital admission, with conditions ranging from myocardial infarction to congestive heart failure. Learning a complete and thorough cardiac examination is therefore crucial for any practicing physician.
FAQs
The key mechanical problem is restricted diastolic expansion. As pressure within the pericardial sac rises, the cardiac chambers cannot enlarge normally while filling. This reduces the amount of blood entering the heart before contraction, so venous return and subsequent forward blood flow decline. The resulting impairment explains why even preserved contraction may not maintain effective circulation.
Limited diastolic filling leaves the heart with less blood available to eject during systole. Stroke volume therefore falls, and cardiac output decreases as a downstream consequence. Reduced venous return contributes to this process, linking impaired chamber expansion with inadequate systemic pumping. This relationship is central to recognizing the hemodynamic significance of the condition.
When intrapericardial pressure becomes sufficiently high, the restriction on cardiac filling can markedly reduce venous return, stroke volume, and cardiac output. The circulation may then fail because blood cannot move effectively through the heart, producing obstructive shock. Severity therefore depends not only on the presence of pericardial material but also on its effect on chamber filling and pressure.
Recognition combines several sources of evidence rather than relying on one finding. Clinicians consider the patient’s symptoms, physical findings, and hemodynamic changes, then use echocardiography to assess the pericardial space and cardiac filling. This integrated approach helps connect the clinical presentation with the underlying pressure-related impairment and supports rapid decisions in a potentially life-threatening situation.
Echocardiography can demonstrate a pericardial effusion, meaning accumulated material in the pericardial space, and may show impaired filling of the cardiac chambers. These findings provide visual evidence that complements symptoms, physical examination, and hemodynamic assessment. The study therefore helps clinicians determine whether the fluid or blood is affecting the heart’s ability to fill normally.
Management requires rapid recognition followed by urgent treatment. Clinicians address the pressure around the heart by draining the pericardial space, while also managing the underlying cause of the accumulated fluid, blood, or other material. This two-part approach targets both the immediate restriction on cardiac filling and the process responsible for producing it.