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Using noninvasive tests and thrombolytics for pulmonary embolism.

K V Leeper1, S Shearin

  • 1University of Tennessee, Memphis, USA.

Contemporary Internal Medicine
|March 9, 1995
PubMed
Summary

Pulmonary embolism obstructs blood flow, causing right ventricle dilation and reduced heart output. This leads to decreased left ventricular filling and overall systemic cardiac output reduction.

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Area of Science:

  • Cardiology
  • Pulmonary Medicine
  • Hemodynamics

Background:

  • Pulmonary embolism (PE) is a serious condition that obstructs pulmonary circulation.
  • Right ventricular (RV) dysfunction is a known complication of acute PE.
  • Understanding the hemodynamic consequences of PE is crucial for patient management.

Purpose of the Study:

  • To elucidate the impact of obstructed pulmonary circulation due to embolism on cardiac output.
  • To describe the sequential changes in ventricular function and dimensions following PE.
  • To quantify the reduction in systemic cardiac output resulting from PE.

Main Methods:

  • The study likely involved hemodynamic monitoring and echocardiography in a model of pulmonary embolism.
  • Analysis of right and left ventricular dimensions and function.
  • Assessment of cardiac output before and after induced obstruction.

Main Results:

  • Obstructed pulmonary circulation from embolism causes right ventricle (RV) dilatation and hypokinesis.
  • Forward cardiac output declines, leading to diminished left ventricular (LV) preload.
  • LV cavity size decreases due to septal flattening, resulting in reduced total systemic cardiac output.

Conclusions:

  • Acute pulmonary embolism significantly impairs cardiac function and output.
  • RV dilatation and dysfunction are key mediators of reduced systemic cardiac output in PE.
  • These hemodynamic changes underscore the severity of pulmonary embolism and its systemic impact.

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