Placental growth factor level is correlated with intrapartum fetal heart rate findings

Table 2 Five-tier classification of fetal heart rate deceleration

Fetal heart rate variability	Five-tier classification
Fetal heart rate variability	No	ED	Mild VD	Severe VD	Mild LD	Severe LD	Mild PD	Severe PD
Moderate variability
Normal baseline	1	2	2	3	3	3	3	4
Tachycardia	2	2	3	3	3	4	3	4
Bradycardia ≥ 80 bpm	3	3	3	4	3	4	4	4
Bradycardia < 80 bpm	4	4	-	4	4	4	-	-
Minimal variability
Normal baseline	2	3	3	4	3	4	4	5
Normal baseline	3	3	4	4	4	5	4	5
Bradycardia ≥ 80 bpm	4	4	5	5	5	5	5	5
Bradycardia < 80 bpm	5	5	-	5	5	5	-	-
Absent variability	4	5	5	5	5	5	5	5
Marked variability	2	2	3	3	3	4	3	4
Sinusoidal	4	4	4	4	5	5	5	5

ED Early deceleration, LD Late deceleration, PD Prolonged deceleration, VD Variable deceleration
Deceleration was classified as mild or severe, with severe defined as follows and everything else mild: severe VD, the lowest point of transient bradycardia was < 70 bpm and lasted for ≥ 30 s, or the lowest point was ≥ 70 bpm and < 80 bpm, and lasted for ≥ 60 s; severe LD, the largest drop in heart rate from baseline was ≥ 15 bpm; and severe PD, the lowest point was < 80 bpm

ISSN: 1471-2393