normalpericardialphysiologyandtonadephysiology-nt正常心包填塞生理學(xué)和生理學(xué)n(參考版)
2025-01-15 07:35本頁面
【正文】 Normal Pericardial Physiology Nick Tehrani, MD Normal Pericardial Physiology Mechanical function (Theoretical): Limits ventricular filling ? affects chamber pliance More significant vis224。vis RV than LV Limits the extent of acute dilitation of the ventricle Even distribution of pressure over the ventricles ? Balancing RV/LV outputs Normal Pericardial Physiology Other functions of the Pericardium Decreasing friction Mechanical barrier to contiguous spread of infection Normal pericardium contains 2030 cc of lymphoid fluid DDx of Pericardial Effusion Pregnancy and pericardial effusion PE can be seen in late pregnancy Women with increased fluid retention more monly affected Typically resolve spontaneously postpartum Localization of Effusion Increased pericardial fluid tends to collect initially behind the posterior wall of the left ventricle just distal to the AV groove. Readily visualized in the parasternal long view in this position 2D Diagnosis Echolucent space adjacent to the cardiac structures Effusions usually are clear, diffuse and symmetric in the absence of prior pericardial disease or surgery Pleural . Pericardial Effusion Fig 3516 Normal MMode Normal pericardium and epicardium are in close apposition and move in unison In systole this motion is inward In diastole this motion is outward Normal variant, slight systolic separation of the visceral and parietal layers recorded on Mmode
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