WCH in Pregnancy

The white-coat effect is a measure of blood pressure change from before to during the visit in office/clinic when the blood pressure is recorded by a physician or nurse; this was first described in 1983 by Mancia et al, and was initially thought to represent a benign process. But it was unclear what this actually meant for pregnancy. Ambulatory blood pressure monitoring (ABPM) has been used in pregnancy for about 20 years now. Use of this monitoring option has revealed a subgroup of patients who have persistently high blood pressure (BP) in the presence of health care providers, but a normal ambulatory or self-measured BP. This phenomenon has been termed “White Coat Hypertension” (WCH). In 2013, The International Society for the Study of Hypertension in Pregnancy (ISSHP) published the revised classification for hypertensive disorders in pregnancy, that included WCH, not previously included. The ISSHP guidelines also emphasize that a diagnosis of white coat hypertension in pregnancy should only be considered before 20 weeks of gestation. We now know that WCH, outside of pregnancy, is not an entirely benign process. The role of metabolic risk factors in patients with white-coat hypertension was first outlined in 2000 by Kario and Pickering. When metabolic risk factors are present in association with white-coat hypertension, the increased risk of target organ damage is determined not only by the blood pressure characteristics but also by the metabolic abnormalities. Recognizing the potential risks of white coat hypertension was also published in a commentary in 2016 out of the European Society of Cardiology. That article’s title was, “White-coat hypertension: not so innocent”. But what is the latest data on WCH in pregnancy? Is WCH linked to poor obstetrical outcomes? Does WHC need medication therapy? We have data from 2024 to help us. Listen in for details.