case_images: PMC4086516_01
case_images: Time course of S/DBP and frequency-/time-domain HRV variables with postural change.
case_images: CRID2014-656045.001.jpg
case_images: PMC4086516_01_CRID2014-656045.001.jpg
case_images: fig1
case_images: When her posture was changed from supine to sitting 40 minutes after the surgery, orthostatic hypotension (systolic/diastolic blood pressure (S/DBP): 65/25 mmHg) with nausea developed 5 minutes after the postural change (Table 1, Figure 1). RMSSD and ApEn decreased; in particular, RMSSD decreased to 16.8 ms (Table 1, Figure 1). Regarding frequency-domain HRV variables, at the onset of nitrous oxide inhalation, the high-frequency (HF) component increased to 1350.5 ms2; in contrast, normalized LF (LF norm) and the low-frequency/high-frequency (LF/HF) ratio decreased to 15.0 nu and 0.177, respectively (Table 1, Figure 1). TP, LF, and HF to decrease to 1620.2 ms2, 426.9 ms2, and 54.5 ms2, respectively (Table 1). The LF norm relatively increased while HF norm decreased to 11.3 nu such that the LF/HF ratio increased to 7.833 (Table 1, Figure 1).