Normal ranges for commonly assessed ECG values in the newborn

Table A3.1

	<1 day	1–3 days	4–7 days	8–10 days
Heart rate (beats/min)	94–155	92–158	90–166	106–182
PR lead II (ms)	80–100	81–139	74–136	72–138
QRS duration V5 (ms)	21–75	22–67	21–68	22–79
Frontal QRS axis (degrees)	+60 to +190	+62 to +196	+75 to +190	+65 to +160
QRS size (mV)
V1
Q	0	0	0	0
R	0.5–2.6	0.5–2.6	0.3–2.4	0.3–2.1
S	0–2.3	0–2.1	0–1.7	0–1.1
T	−0.3 to 4	−0.4 to 4	−0.45 to 2.5	−5 to −1
V6
Q	0–0.17	0–0.21	0–0.28	0–0.28
R	0–1.1	0–1.2	0–1.2	0.25–1.6
S	0–1.0	0–0.9	0–1.0	0–1.0
R/S V1	0.2–9.8	0.2–6	0.2–9.8	1–7
R/S V6	0.2–10	0.2–1	0.2–10	0.2–12

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Apr 21, 2019 | Posted by drzezo in PEDIATRICS | Comments Off