J Clin Monit Comput - Relations between respiratory changes in R-wave amplitude and arterial pulse pressure in mechanically ventilated patients.

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Resumo

TRODUCTION: R-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.METHOD: R-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.RESULTS: There 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.CONCLUSION: DeltaRDII and DeltaPP are related in this setting.

Resumo Limpo

troduct rwave obtain electrocardiogram depend ventricular stroke volum assess relationship respiratori variat rwave deltardii puls pressur deltapp general anesthesiamethod rwave amplitud measur standard lead ii rdii maxim rdii rdiimax minim rdii rdiimin determin one respiratori cycl deltardii calcul x rdiimaxrdiiminrdiimax rdiimin deltardii deltapp simultan recordedresult signific relationship r p deltardii deltapp deltardii detect patient deltapp sensit specificityconclus deltardii deltapp relat set

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