Key result
Pregnancy accelerated the ventricular response of incessant atrial tachycardia, which spontaneously reverted to sinus rhythm during labor and later recurred with a slower rate.
This case highlights that incessant atrial tachycardia can be accelerated by pregnancy and may spontaneously resolve during labour.
Warrants close rate monitoring in pregnant patients with atrial tachycardia; single case leaves open generalizability and mechanisms.
A 24 year old patient presented with incessant atrial tachycardia during the course of a twin pregnancy. Medical treatment slowed the ventricular response without restoring sinus rhythm. During labour the tachycardia spontaneously reverted to sinus rhythm. Subsequently the same arrhythmia was documented with a slower ventricular response than during pregnancy.
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Doig et al. (1992) studied this question. Pregnancy accelerated the ventricular response of incessant atrial tachycardia, which spontaneously reverted to sinus rhythm during labor and later recurred with a slower rate.
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