title: Maternal renal artery Doppler sonographic changes in pregnancy-induced hypertension in South West Nigeria.
abstract: BACKGROUND
  To evaluate the renal arterial hemodynamic changes caused by pregnancy-induced hypertension using Doppler ultrasonography.
  
  
  METHODS
  Eighty (80) subjects with pregnancy-induced hypertension (PIH) and 160 controls (80 pregnant normotensive women and 80 healthy, non-pregnant women) underwent triplex renal sonography prospectively to determine their renal volumes and right renal artery Doppler indices.
  
  
  RESULTS
  The peak systolic velocity, end diastolic velocity, pulsatility index, systolic/diastolic ratio and acceleration time were respectively significantly higher in the PIH group (68.67 cm/s, 21.55 cm/s, 1.23, 3.38, 123.2 ms) than the pregnant, normotensive group (65.19 cm/s, 20.27 cm/s, 0.88, 3.35, 61.14 ms) and healthy, non-pregnant group (52.06 cm/s, 18.27 cm/s, 0.84, 2.90, 68.48 ms). Resistivity index was also increased in the PIH group, but this was not statistically significant. Conversely, the systolic acceleration was significantly lower in the PIH group (6.06 m/s(2)) compared to the pregnant, normotensive group (11.82 m/s(2)) and healthy, non-pregnant group (8.26 m/s(2)). The right renal volume of the PIH group (132.76 cm(3)) was significantly higher that of the pregnant, normotensive group (125.29 cm(3)) and healthy, non-pregnant group (91.66 cm(3)). The same pattern was observed in the left renal volume which was 168.78 cm(3), 164.95 cm(3) and 113.80 cm(3) in the study groups, respectively.
  
  
  CONCLUSIONS
  Renal Doppler ultrasound is clinically relevant in the diagnosis and follow-up of renal complications in patients with pregnancy-induced hypertension.
authors.affiliation: Department of Radiology, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Osun State, Nigeria.
authors.forename: Olusanmi Abel
authors.initials: OA
authors.lastname: Ogunmoroti
authors.affiliation: Department of Radiology, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Osun State, Nigeria.
authors.forename: Oluwagbemiga Oluwole
authors.initials: OO
authors.lastname: Ayoola
authors.affiliation: Department of Obstetrics & Gynecology, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Osun State, Nigeria.
authors.forename: Olufemiwa Niyi
authors.initials: ON
authors.lastname: Makinde
authors.affiliation: Department of Radiology, Obafemi Awolowo University Teaching Hospitals Complex, Ile-Ife, Osun State, Nigeria.
authors.forename: Bukunmi Michael
authors.initials: BM
authors.lastname: Idowu
keywords: Doppler ultrasonography; hypertension; pregnancy; renal artery