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Related Experiment Videos

Can pleural effusions cause tamponade-like effects?

H S Klopfenstein1, L S Wann

  • 1Cardiology Section, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, North Carolina 27157-1045, USA.

Echocardiography (Mount Kisco, N.Y.)
|August 6, 1994
PubMed
Summary
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Large bilateral pleural effusions can falsely indicate a need for pericardial fluid drainage by causing right ventricular diastolic collapse (RVDC). Thoracentesis is the recommended treatment for RVDC due to pleural effusions.

Area of Science:

  • Cardiology
  • Pulmonology
  • Critical Care Medicine

Background:

  • Pericardial effusion can lead to right ventricular diastolic collapse (RVDC).
  • Pleural effusions can increase intrathoracic pressure, potentially affecting cardiac hemodynamics.
  • The interaction between pleural effusions and pericardial effusion requires further clarification.

Purpose of the Study:

  • To investigate the hemodynamic impact of large bilateral pleural effusions on hemodynamically insignificant pericardial effusions.
  • To determine if pleural effusions can cause a false positive indication for pericardiocentesis.
  • To differentiate the management of RVDC caused by pleural effusions versus isolated pericardial effusion.

Main Methods:

  • Experimental studies were conducted to simulate conditions of combined pleural and pericardial effusions.

Related Experiment Videos

  • Hemodynamic parameters, specifically right ventricular diastolic pressures and collapse, were monitored.
  • Intrapericardial and intrapleural pressures were measured under varying fluid volumes.

    • Main Results:

    • Large bilateral pleural effusions can elevate intrapericardial pressure in cases of minor pericardial effusion, leading to RVDC.
    • The hemodynamic compromise in this scenario is less severe than in isolated pericardial effusion causing RVDC.
    • RVDC induced by concurrent pleural effusions is a false positive for pericardiocentesis.

    Conclusions:

    • RVDC in the presence of large bilateral pleural effusions and minor pericardial effusion is often a false positive finding.
    • Thoracentesis is the more appropriate intervention for managing RVDC caused by significant pleural effusions.
    • This syndrome highlights the importance of considering extrathoracic fluid collections when interpreting cardiac tamponade physiology.