Left ventricular end-diastolic area is a measure of cardiac preload in patients with early septic shock.
OBJECTIVE
Central venous pressure, intrathoracic blood volume, and left ventricular end-diastolic area are reliable measures of cardiac preload under stable clinical conditions. The purpose of this study was to compare different preload parameters over 24 h under conditions of multiple, frequently changing treatments in early septic shock.


METHODS
In 28 mechanically ventilated patients within 6 h of the onset of septic shock, left ventricular end-diastolic area was measured using transoesophageal echocardiography. Intrathoracic blood volume, stroke volume variation, and central venous pressure were analysed as preload parameters. The relation between parameter changes and changes in therapy was examined with respect to cardiac index and stroke volume index.


RESULTS
Regarding preload variables, linear regression analyses revealed a significant correlation between left ventricular end-diastolic area and stroke volume index (r=0.59, P<0.001) and cardiac index (r=0.41, P<0.001), respectively. Changes in left ventricular end-diastolic index and intrathoracic blood volume index reflected changes in the stroke volume index, whereas central venous pressure did not. Myocardial responsiveness also failed to predict changes in the stroke volume index.


CONCLUSIONS
Only the left ventricular end-diastolic area index may help predict preload in ventilated patients with early septic shock.
Scheuren
Karoline
K
Department of Anaesthesiology, University of Heidelberg, Heidelberg, Germany.
Wente
Moritz N
MN
Hainer
Christian
C
Scheffler
Matthias
M
Lichtenstern
Christoph
C
Martin
Eike
E
Schmidt
Jan
J
Bopp
Christian
C
Weigand
Markus A
MA
D002302:Cardiac Output / Q000502:physiology*; D002496:Central Venous Pressure / Q000502:physiology; D017548:Echocardiography, Transesophageal; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D012044:Regression Analysis; D012121:Respiration, Artificial; D012772:Shock, Septic / Q000503:physiopathology* / Q000628:therapy; D013318:Stroke Volume / Q000502:physiology; D016896:Treatment Outcome; D016277:Ventricular Function, Left / Q000502:physiology*