Table 1.

Summary of results

Case	Maternal LQTS	fECG (GA)	fMCG (GA)	Postnatal ECG	Postnatal genetic testing
1	Yes, KCNE1 and KCNH2 mutations	QTc 526ms (23) Repeat QTc 544 ms (27)	QTc 573 ms (25)	Positive, QTc 480–572 ms	Variant KCNH2 gene (LQTS type2)
2	No	QTc 504 ms (24)	Not done	Positive, QTc 484–527 ms	Variant KCNQ1 gene (LQTS type 1)
3	Yes, gene negative	QTc 433 ms (27)	QTc 451 ms (22)	Normal	Not done

LQTS, long QT syndrome; fECG, fetal electrocardiogram; GA, gestational age; fMCG, fetal magnetocardiography; ms, milliseconds.