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J Soc Gynecol Investig. 1998 Mar-Apr;5(2):68-71.

Uteroplacental pathology and maternal arterial mean blood pressure in spontaneous prematurity.

Author information

1
Department of Pathology, Montefiore Medical Center, Bronx, New York 10461, USA.

Abstract

OBJECTIVE:

To examine if maternal blood pressure is directly related to the presence and severity of uteroplacental vascular pathology in nonpreeclamptic preterm birth.

METHODS:

A set of consecutive nonanomalous singleton live births delivered at 22-32 weeks (excluding maternal diabetes mellitus and chronic hypertension) between 1989 and 1994 included 342 cases of spontaneous prematurity (spontaneous premature membrane rupture [PROM], preterm labor with intact membranes [PTL], and nonhypertensive abruption) with mean arterial blood pressure at admission available in the maternal record. Presence and extent of placental lesions were scored.

RESULTS:

Mean maternal arterial blood pressure on admission was significantly related to the presence/extent of uteroplacental vascular lesions (P = .01) and to lesions of intraplacental vaso-occlusion (P = .04). These associations were independent of maternal age and gestational age at delivery. Moreover, the summation of uteroplacental and intraplacental vascular lesions into a cumulative placental vascular pathology score was even more significantly correlated with increasing mean blood pressure at admission, suggestive of synergism between these two placental pathologic processes.

CONCLUSION:

In nonpreeclamptic prematurity, mean maternal admission blood pressure is directly related to the severity of placental vascular pathology.

PMID:
9509383
DOI:
10.1016/S1071-5576(97)00104-4
[Indexed for MEDLINE]

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