[Cervical artery dissection in women: relationships with pregnancy and postpartum period].

OBJECTIVE

To study the frequency of CeAD that developed during pregnancy or in post partum period among all CeADs in women; to study the course of pregnancy in women with prior CeAD.

MATERIAL AND METHODS

162 women (mean age 37.1±4.1 years) with CeAD we examined at the Research Center of Neurology (Moscow), 98% women were studied during last 15 years. 140 women were of childbearing age (≤45 years, mean age - 35±2.8 years). All patients were interviewed whether or not CeAD occurred during pregnancy or in post partum period (CeADPPP). Obstetric history before and after CeAD was studied in 57 women of childbearing age (average age - 35.9±7.3 years at CeAD development).

RESULTS

CeADPPP developed in 6 out of 162 all female patients (3.7%) or of 140 childbearing age patients (4.3%). It occurred 2-6 months (4 patients) and 10 days after delivery (1 patient), or on the 25 week of pregnancy (1 patient). CeADPPP patients were younger than patients with CeAD out of pregnancy or postpartum period (29.8±8 years vs 35.1±6.7 years, >0.05). CeADPPP in comparison with CeAD outside these periods more often involved internal carotid artery (ICA) (50% vs 35%, =0.666), more often occurred in 2-3 arteries (50% vs 31%, =0.386) and more often was accompanied by dissecting aneurysm development (50% vs 8%, =0.013). After CeAD, 18 out of 57 patients in whom obstetric history was studied, including 3 patients with postpartum dissection had 29 pregnancies. The pregnancy outcomes were as follows: childbirth (17 pregnancies, 59%), fetal loss (8 pregnancies, 27%) and medical abortion (4 pregnancies, 14%). Delivery occurred on average 4.5±2.061 years after CeAD in women aged 33.0±4.25 years (cesarean section - 15 patients). Fetal loss occurred at 7.4±3.5 weeks of pregnancy in women aged 37.6±3.13 years on average 2.7±1.4 years after CeAD. Fetal loss frequency after CeAD was higher than before it (27% vs 7%, =0.016). There were no CeAD recurrences during pregnancy and postpartum period in women who had previously undergone CeAD.

CONCLUSION

CeADPPP frequency among all dissections in women is 3.7-4.3%. The risk of CeAD recurrence during pregnancy or the postpartum period after prior CeAD is very low. The risk of fetal loss during 2.7±1.4 years after CeAD is higher than before it (27% vs 7%). Hormonal and growth factors associated with pregnancy and the postpartum period is suggested to contribute to cervical artery wall damage. It is possible that the prolonged action of some of these factors may disrupt the placental vessels formation, predisposing to miscarriage.