• Maxime Cannesson, Geoffray Keller, Olivier Desebbe, and Jean-Jacques Lehot.
• Department of Anesthesiology & Perioperative Care, University of California, Irvine, Orange, 92868-3301, USA. maxime_cannesson@hotmail.com
• J Clin Monit Comput. 2010 Jun 1;24(3):203-7.

IntroductionR-wave obtained from the electrocardiogram depends on ventricular stroke volume. We assessed the relationship between respiratory variations in R-wave (DeltaRDII) and in pulse pressure (DeltaPP) during general anesthesia.MethodR-wave amplitude was measured from standard lead II (RDII). Maximal RDII (RDIImax) and minimal RDII (RDIImin) were determined over one respiratory cycle. DeltaRDII was calculated as 100 x [RDIImax-RDIImin]/([RDIImax + RDIImin]/2. DeltaRDII and DeltaPP were simultaneously recorded.ResultsThere was a significant relationship (r = 0.79; P < 0.001) between DeltaRDII and DeltaPP. A DeltaRDII > 13% detected patients with a DeltaPP > 13% with an 89% sensitivity, and an 88% specificity.ConclusionDeltaRDII and DeltaPP are related in this setting.

19 keywords...

hide…