Aärimaa T, Kero P, Välimäki I
Crit Care Med. 1985 Jan;13(1):9-11. doi: 10.1097/00003246-198501000-00003.
Instantaneous heart rate, indices of long-term and short-term heart-rate variability (HRV), and transcutaneous O2 (PtcO2) and CO2 (PtcCO2) tensions were recorded simultaneously on 164 occasions in 16 neonates. There was significant inverse correlation between PtcCO2 and both HRV indices, while no linear correlation was detected between HRV and PtcO2. The heart rate was positively related to PtcCO2 and inversely correlated with PO2. It is suggested that increasing PCO2 decreases medullary pH, thus increasing heart rate and decreasing HRV. We conclude that each of these monitoring variables is unique: the transcutaneous measurements display the efficiency of respiration, whereas the heart-rate patterns reflect the dynamic condition of the autonomic nervous system.
在16例新生儿中，共164次同时记录瞬时心率、长期和短期心率变异性（HRV）指标以及经皮氧分压（PtcO2）和二氧化碳分压（PtcCO2）。PtcCO2与两个HRV指标之间存在显著负相关，而HRV与PtcO2之间未检测到线性相关。心率与PtcCO2呈正相关，与PO2呈负相关。提示二氧化碳分压升高会降低延髓pH值，从而增加心率并降低HRV。我们得出结论，这些监测变量各有特点：经皮测量显示呼吸效率，而心率模式反映自主神经系统的动态状况。
