Ambulatory blood pressure monitoring in treated patients with hypertension in the COVID-19 pandemic - The study of European society of hypertension (ESH ABPM COVID-19 study).

PURPOSE: The coronavirus disease 2019 (COVID-19) pandemic and the subsequent lockdown profoundly affected almost all aspects of daily life including health services worldwide. The established risk factors for increased blood pressure (BP) and hypertension may also demonstrate significant changes during the pandemic. This study aims to determine the impact of the COVID-19 pandemic on BP control and BP phenotypes as assessed with 24-hour ambulatory BP monitoring (ABPM).

MATERIALS AND METHODS: This is a multi-centre, observational, retrospective and comparative study involving Excellence Centres of the European Society of Hypertension across Europe. Along with clinical data and office BP, ABPM recordings will be collected in adult patients with treated arterial hypertension. There will be two groups in the study: Group 1 will consist of participants who have undergone two ABPM recordings - the second one occurring during the COVID-19 pandemic, i.e. after March 2020, and the first one 9-15 months prior to the second. Participants in Group 2 will have two repeated ABPM recordings - both performed before the pandemic within a similar 9-15 month interval between the recordings. Within each group, we will analyse and compare BP variables and phenotypes (including averaged daytime and night-time BP, BP variability, dipper and non-dipper status, white-coat and masked hypertension) between the two respective ABPM recordings and compare these changes between the two groups. The target sample size will amount to least 590 participants in each of the study groups, which means a total of at least 2360 ABPM recordings overall.

EXPECTED OUTCOMES: As a result, we expect to identify the impact of a COVID-19 pandemic on blood pressure control and the quality of medical care in order to develop the strategy to control cardiovascular risk factors during unpredictable global events.