Orthostatic Dysregulation during Postural Change on the Dental Chair and Intraoperative Monitoring by Heart Rate Variability Analysis

Table 1

Clinical manifestation and scores of frequency-/time-domain HRV variables during dental therapy.

	Therapy; onset	Inhale; onset	Midazolam; administration	Local; anesthesia	Teeth; extraction	Inhale; end	Reclined; position	Upright; position	Atropine administration; and therapy end
Posture	Sitting	Supine	Supine	Supine	Supine	Supine	Supine	Sitting	Supine
Nausea	−	−	−	−	−	−	−	+	−
S/DBP^1 (mmHg)	106/42	110/55	108/50	131/57	135/69	115/50	108/49	65/25	119/72
Mean HRT^2 (bpm)	49	47	56	70	49	52	56	51	81
SDNN^3 (ms)	54.0	67.8	77.7	193.0	73.7	81.4	71.0	86.8	68.2
RMSSD^4 (ms)	71.2	93.0	84.5	78.5	88.8	84.5	70.3	85.6	16.8
PSI^5	11.6	13.3	7.0	7.9	7.2	7.2	10.2	7.2	27.1
ApEn^6	0.866	0.757	0.872	0.273	0.819	0.875	0.946	0.854	0.544
TP^7 (ms^2)	1530.0	2948.7	5477.9	33920.5	4196.3	3760.6	2141.8	5215.6	1620.2
VLF^8 (ms^2)	757.9	1359.3	4078.6	31187.1	1583.1	1540.3	234.7	1695.0	1138.8
LF^9 (ms^2)	300.0	238.8	271.9	1919.1	707.2	1264.9	1416.1	2281.5	426.9
HF^10 (ms^2)	472.0	1350.5	1127.4	814.3	1906.0	955.4	491.0	1239.1	54.5
LF norm^11 (nu)	38.9	15.0	19.4	70.2	27.1	57.0	74.3	64.8	88.7
HF norm^12 (nu)	61.1	85.0	80.6	29.8	72.9	43.0	25.7	35.2	11.3
LF/HF^13	0.636	0.177	0.241	2.357	0.371	1.324	2.884	1.841	7.833

HRV: heart rate variability. 1Systolic/Diastolic blood pressure. 2Heart rate. 3Standard deviation of all NN intervals. 4Square root of the mean squared differences of successive NN intervals. 5Physical stress index. 6Approximate entropy. 7Total power. 8Very low frequency. 9Low frequency. 10High frequency. 11Normalized low frequency. 12Normalized high frequency. 13Low-frequency/high-frequency ratio.