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The Annals of Thoracic Surgery, Vol 23, 555-559, Copyright © 1977 by The Society of Thoracic Surgeons

ARTICLES

Effects of PEEP on cardiovascular dynamics after open-heart surgery: a new postoperative monitoring technique

TA Angerpointner, AE Farnsworth and BT Williams

The circulatory effects of incremental increases in positive end- expiratory pressure ventilation (PEEP) were assessed on 11 occasions in post-operative cardiac surgical patients by phasic aortic blood flow measurements and high-fidelity pressure recordings from which flow and pressure-flow derivatives of cardiac performance were calculated. At 15 cm H2O PEEP, mean arterial blood pressure was decreased by 10%, stroke volume and cardiac output by 15%, and peak left ventricular power by 21%. Although these indices promptly returned to control levels when PEEP was discontinued, levels of PEEP above 10 cm H2O should be used with caution for this group of patients.




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ANN THORAC SURG ASIAN CARDIOVASC THORAC ANN EUR J CARDIOTHORAC SURG
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Copyright © 1977 by The Society of Thoracic Surgeons.