Atrioventricular Conduction Delay in the Second Trimester Measured by Fetal Magnetocardiography

Table 2

Cardiac time intervals of the study group compared to those of the control group at 18–26 weeks of gestation (𝑃 value is adjusted for gestational age, gender, and weight).

Characteristics	Study group 𝑛=18 measurements mean ± SD (ms)	Control group 𝑛=19 measurements mean ± SD (ms)	Statistical significance (ANCOVA)
P wave	38 ± 7	43 ± 6	ns
PR segment	58 ± 11	48 ± 12	𝑃=0.036
PR interval	95 ± 14	91 ± 13	ns
QRS complex	51 ± 12	53 ± 7	ns
T wave	133 ± 37	157 ± 46^#	ns
QT interval	240 ± 40	259 ± 40^#	ns

^#𝑛=16 measurements due to low identification rate.