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Pathophysiology of the Pericardium
1Physiology and Biophysics, Case Western Reserve University, Cleveland, OH; University Hospitals Cleveland Medical Center, Cleveland, OH.
Progress in Cardiovascular Diseases
|December 6, 2016
Summary
Pericardial heart diseases like cardiac tamponade and constrictive pericarditis involve pericardial fluid or thickening that restricts heart function. These conditions impair diastolic filling, leading to reduced cardiac output.
Area of Science:
- Cardiology
- Cardiac Physiology
Background:
- Pericardial heart disease encompasses pericarditis, constriction, and cardiac tamponade.
- These conditions arise from acute to chronic inflammatory or fibrotic changes in the pericardium.
Purpose of the Study:
- To elucidate the pathophysiology of cardiac tamponade and constrictive pericarditis.
- To correlate pathophysiological mechanisms with clinical and diagnostic findings.
Main Methods:
- Review of clinical examination findings.
- Analysis of Doppler echocardiography data.
- Interpretation of cardiac catheterization results.
Main Results:
- Cardiac tamponade involves pan-cyclic compression of cardiac chambers due to increased pericardial fluid, leading to competition for fixed intrapericardial volume.
- Constrictive pericarditis restricts diastolic filling due to pericardial thickening, causing dissociation of intracardiac and intrathoracic pressures.
- Both conditions exhibit heightened ventricular interdependence, diastolic dysfunction, elevated and equalized diastolic pressures, respiratory variations in filling, and reduced cardiac output.
Conclusions:
- The pathophysiology of cardiac tamponade and constrictive pericarditis explains their characteristic clinical and diagnostic features.
- Understanding these mechanisms is crucial for diagnosing and managing pericardial heart diseases.
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