title: Abnormal pressure-wave reflection in pregnant women with chronic hypertension: association with maternal and fetal outcomes.
abstract: The current study tested the hypothesis that abnormal pressure-wave reflection may have an important role in identifying pregnant women with chronic hypertension who might develop pre-eclampsia (PE) and/or fetal growth restriction. Pulse-wave analyses were performed to assess maternal arterial stiffness during 26-32 weeks of gestation in 41 women with chronic hypertension. We measured the central systolic pressure (CSP) and augmentation index (AIx) noninvasively using pulse waveforms of the radial artery with an automated applanation tonometric system. In a multiple regression analysis that included AIx-75 (AIx at a heart rate of 75 beats per minute), brachial systolic pressure, maternal height, smoking status, gestational age at testing and the presence of antihypertensive treatment at testing as independent determinants, AIx-75 was the only significant determinant of birth weight, whereas the brachial systolic pressure was not. In pregnant women with chronic hypertension who subsequently developed both superimposed PE and fetal growth restriction, CSP, AIx, AIx-75, and the brachial systolic and pulse pressures were all significantly higher than those who did not develop superimposed PE nor small for gestational age. In contrast, AIx-75 was the only significantly elevated hemodynamic parameter in patients who developed fetal growth restriction but not superimposed PE. In addition, CSP was the only significantly elevated hemodynamic parameter in patients who developed superimposed PE but not fetal growth restriction. Abnormal pressure-wave reflection during 26-32 weeks of gestation showed a stronger correlation with birth weight than conventional brachial blood pressure. Our findings might provide new insight into the pathophysiology of fetal growth restriction as well as superimposed PE in pregnancies complicated with chronic hypertension.
authors: Department of Obstetrics and Gynecology, Kawasaki Medical School, Kurashiki, Okayama, Japan.
authors: Takuji
authors: T
authors: Tomimatsu
authors: Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors: Mika
authors: M
authors: Fujime
authors: Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors: Tomoko
authors: T
authors: Kanayama
authors: Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors: Kazuya
authors: K
authors: Mimura
authors: Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors: Shinsuke
authors: S
authors: Koyama
authors: Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors: Takeshi
authors: T
authors: Kanagawa
authors: Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors: Masayuki
authors: M
authors: Endo
authors: Department of Obstetrics and Gynecology, Kawasaki Medical School, Kurashiki, Okayama, Japan.
authors: Koichiro
authors: K
authors: Shimoya
authors: Department of Obstetrics and Gynecology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
authors: Tadashi
authors: T
authors: Kimura
mesh_terms: D000328:Adult; D000959:Antihypertensive Agents / Q000627:therapeutic use; D044466:Asian People; D001724:Birth Weight; D001794:Blood Pressure / Q000502:physiology*; D002908:Chronic Disease; D015331:Cohort Studies; D005260:Female; D005333:Fetus; D005865:Gestational Age; D006801:Humans; D006973:Hypertension / Q000503:physiopathology*; D011247:Pregnancy; D011256:Pregnancy Outcome; D063177:Pulse Wave Analysis; D059289:Vascular Stiffness
chemical_list: D000959:Antihypertensive Agents