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Hypertensive disorder during pregnancy

Glossary Item Attributes

Identifying and definitional attributes

Metadata item type:Help on this termGlossary Item
METEOR identifier:Help on this term655620
Registration status:Help on this term
  • Health, Superseded 03/12/2020
Definition:Help on this term

Hypertensive disorder during pregnancy includes pre-existing hypertensive disorders, hypertension arising in pregnancy and associated disorders such as eclampsia and preeclampsia.

Hypertension in pregnancy is defined as:

1. Systolic blood pressure greater than or equal to 140 mmHg and/or

2. Diastolic blood pressure greater than or equal to 90 mmHg.

Measurements should be confirmed by repeated readings over several hours. Elevations of both systolic and diastolic blood pressures have been associated with adverse fetal outcome and therefore both are important.

Disorders associated with hypertension such as eclampsia and preeclampsia are further characterised by symptoms such as proteinuria, oedema or high body temperature.

There are several reasons to support the blood pressure readings defined above as diagnostic of hypertension in pregnancy:

  • perinatal mortality rises with diastolic blood pressures above 90 mmHg
  • readings above this level were beyond two standard deviations of mean blood pressure in a New Zealand cohort of normal pregnant women
  • the chosen levels are consistent with international guidelines and correspond with the current diagnosis of hypertension outside of pregnancy.

This definition of hypertensive disorder in pregnancy from the Society of Obstetric Medicine in Australia and New Zealand (SOMANZ) aligns with the definition of the International Society for the Study of Hypertension in Pregnancy (ISSHP).

Source and reference attributes

Reference documents:Help on this term

Lowe SA, Bowyer L, Lust K, McMahon LP, Morton MR, North RA et al. 2014. Guideline for the management of hypertensive disorders of pregnancy. Society of Obstetric Medicine of Australia and New Zealand.

Brown M, Lindheimer M, Swiet M, Assche A and Moutquin J-M 2001. The classification and diagnosis of the hypertensive disorders of pregnancy: statement from the International Society for the Study of Hypertension in Pregnancy (ISSHP). Hypertension in pregnancy 20(1), ix-xiv.

Relational attributes

Related metadata references:Help on this term
Supersedes Hypertensive disorder during pregnancy
  • Health, Superseded 05/10/2016
  • Tasmanian Health, Standard 20/12/2016
Has been superseded by Hypertensive disorder during pregnancy
  • Health, Standard 03/12/2020
Metadata items which use this glossary item:Help on this term
Female—hypertensive disorder during pregnancy indicator
  • Health, Superseded 03/12/2020
Female—hypertensive disorder during pregnancy indicator, yes/no/not stated/inadequately described code N
  • Health, Superseded 20/11/2019
Female—hypertensive disorder during pregnancy indicator, yes/no/not stated/inadequately described code N
  • Health, Superseded 02/08/2017
Female—hypertensive disorder during pregnancy indicator, yes/no/not stated/inadequately described code N
  • Health, Superseded 03/12/2020
Female—type of hypertensive disorder during pregnancy
  • Health, Superseded 03/12/2020
Female—type of hypertensive disorder during pregnancy, code N
  • Health, Superseded 03/12/2020
Female—type of hypertensive disorder during pregnancy, code N
  • Health, Superseded 12/12/2018
Female—type of hypertensive disorder during pregnancy, code N
  • Health, Superseded 02/08/2017
Female—type of hypertensive disorder during pregnancy, code N
  • Health, Superseded 20/11/2019
Hypertensive disorder during pregnancy indicator
  • Health, Superseded 03/12/2020
Perinatal NBEDS 2017-18
  • Health, Superseded 02/08/2017
Perinatal NBEDS 2018-19
  • Health, Superseded 12/12/2018
Perinatal NBEDS 2019–20
  • Health, Superseded 20/11/2019
Perinatal NBEDS 2020–21
  • Health, Superseded 03/12/2020
Type of hypertensive disorder during pregnancy
  • Health, Superseded 03/12/2020
Type of hypertensive disorder during pregnancy code N
  • Health, Superseded 03/12/2020
Type of hypertensive disorder during pregnancy code N
  • Health, Superseded 20/11/2019
Type of hypertensive disorder during pregnancy code N
  • Health, Superseded 12/12/2018
Type of hypertensive disorder during pregnancy code N
  • Health, Superseded 02/08/2017
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