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Figure 3 Ectopy and Tachycardia in 3° Fetal AVB

Rhythm strips from third-degree (3°) atrioventricular block (AVB) fetuses showing: (A) ventricular bigeminy with wide ectopic complexes; (B and C) episodes of nonsustained VT in fetuses #4 and #3, respectively; and (D) junctional ectopic tachycardia in fetus #14 with highly irregular ventricular rhythm at 19 weeks’ gestation.