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The effect of positive end‐expiratory pressure ventilation on atrial filling
Author(s) -
Riddervold F.,
Smiseth O. A.,
RisØoSe C.
Publication year - 1991
Publication title -
acta anaesthesiologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.738
H-Index - 107
eISSN - 1399-6576
pISSN - 0001-5172
DOI - 10.1111/j.1399-6576.1991.tb03326.x
Subject(s) - medicine , sonomicrometry , positive end expiratory pressure , pericardium , left atrial pressure , cardiology , anesthesia , hemodynamics , mechanical ventilation
As a measure of atrial filling, left and right auricular diameter and free wall segment length were recorded by sonomicrometry during incremental positive end‐expiratory pressure (PEEP) in eight acutely instrumented closed chest dogs. The effect of PEEP was assessed with the pericardium open (n = 6) and closed (n = 8). On both occasions, PEEP decreased left auricular diameter ( P <0.05). PEEP also caused a reduction in right auricular diameter with the pericardium open ( P <0.05), while the variable was unchanged with the pericardium closed. PEEP did not cause any changes in either left or right free wall segment lengths. Both left and right auricular pressure‐diameter relationships were progressively shifted leftwards with incremental PEEP. These observations suggest that PEEP may reduce left ventricular output not only by interfering with passive ventricular filling, but also by reducing atrial dimensions.