Table 2:
Fetal cardiac time intervals.
Characteristics
Study group
measurements
mean ± SD (ms)
Control group
measurements
mean ± SD (ms)
Statistical
significance
(
-test)
Fetal heart rate (beats per minute)
135 ± 10
135 ± 10
ns
P wave
53 ± 15
58 ± 13
ns
PQ segment
56 ± 10
49 ± 10
PR interval
109 ± 17
107 ± 15
ns
QRS complex
53 ± 7
52 ± 7
ns
T wave
168 ± 52*
140 ± 28
#
ns
QT interval
261 ± 49*
232 ± 35
#
ns
*
n
= 21 measurements,
#
n
= 18 measurements.