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SAN FRANCISCO -- Blood pressure measurements taken at home identified gestational hypertension more accurately than did measurements taken in physicians' offices, two European studies showed.
In a study of 363 women, 63 with undetected gestational hypertension had been declared normal by office measures but were hypertensive based on measurements taken by ambulatory monitors at home, Ramon C. Hermida Dominguez, Ph.D., said at the annual meeting of the American Society of Hypertension.
In a separate study, 32 of 42 (76%) women who were considered hypertensive by office blood pressure measures were normotensive on home monitoring, Dr. Thierry Denolle, a cardiologist at Hopital St. Malo (France), said in a poster presentation.
The first study followed 363 white, nonpreeclamptic pregnant women whose blood pressure was measured in the office at their obstetrician's discretion and at home by ambulatory monitors every month. The ambulatory monitors measured blood pressure at 20-minute intervals during the day and at 30-minute intervals nightly for 48 hours every 4 weeks.
With the ambulatory readings, investigators determined a patient's excess blood pressure using the hyperbaric index, which calculates an average blood pressure above a time-specified tolerance interval.
A total of 65 women with gestational hypertension were identified by both screening measures, and 235 were normal by both measures.
Compared with hypertensive women, normotensive women showed a 60% lower incidence of preterm delivery, a 70% lower incidence of intrauterine growth retardation, and a 50% lower incidence of C-section delivery In addition, their babies had higher average birth weights.