Department of Anesthesiology & Perioperative Care, University of California, Irvine, Orange, 92868-3301, USA.
J Clin Monit Comput. 2010 Jun;24(3):203-7. doi: 10.1007/s10877-010-9235-3. Epub 2010 May 11.
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.
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.
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.
DeltaRDII and DeltaPP are related in this setting.
心电图的 R 波取决于心室射血量。我们评估了全身麻醉期间 R 波（DeltaRDII）和脉搏压（DeltaPP）呼吸变化之间的关系。
从标准导联 II（RDII）测量 R 波幅度。在一个呼吸周期内确定最大 R 波（RDIImax）和最小 R 波（RDIImin）。DeltaRDII 计算为 100 x [RDIImax-RDIImin]/([RDIImax + RDIImin]/2。同时记录 DeltaRDII 和 DeltaPP。
DeltaRDII 和 DeltaPP 之间存在显著关系（r = 0.79；P < 0.001）。DeltaRDII > 13%可检测出 DeltaPP > 13%的患者，其敏感性为 89%，特异性为 88%。
在此环境下，DeltaRDII 和 DeltaPP 相关。
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