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. 2022 Sep 15;62(Suppl 1):S53–S66. doi: 10.1002/jcph.2129

Figure 3.

Figure 3

29‐week GA fetus with familial LQTS type 2. The top tracing shows low fetal heart rates of 52/min due to functional 2:1 AV block. Irregular tachycardia is seen (left half) with rates of 100‐200/min. The bottom panel shows the rhythm associated with the higher rates, which is torsades de pointes and not sinus rhythm with ectopy as suspected by referral echocardiogram. AV, atrioventricular; FHR, fetal heart rate; fMCG, fetal magnetocardiogram; GA, gestational age; LQTS, long QT syndrome; TdP, torsades de pointes; VT, ventricular tachycardia.