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Chest, Vol 97, 1181-1189, Copyright © 1990 by American College of Chest Physicians

ARTICLES

Hemodynamics during PEEP ventilation in patients with severe left ventricular failure studied by transesophageal echocardiography

S Schuster, R Erbel, LS Weilemann, WY Lu, B Henkel, S Wellek, H Schinzel and J Meyer
IInd Medical Clinic, University School of Medicine, Department of Medical Statistics, Mainz, Federal Republic of Germany.

The effects of mechanical ventilation with PEEP were investigated in five patients with normal cardiopulmonary function (group A) and in 11 patients with severe left ventricular failure (group B). Cross- sectional area of the right and left atrium (RA/LA), left ventricle (LV), and right ventricle (RV) was determined at EDA/ESA using transesophageal echocardiography. Hemodynamic parameters and transesophageal pressure were measured simultaneously at PEEP levels 0, 4, 8, 12, and 16 cm H2O. End-diastolic area of the right atrium decreased significantly in both groups. The RA pressure increased, while transmural pressure remained unaltered. The CI decreased in both groups. The decrease in cardiac output by PEEP ventilation was related to the decrease in RV filling volume by external compression. In patients with congestive heart failure, PEEP ventilation with 8 to 10 cm H2O did not worsen LV function.


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