3026Prevalence of arterial hypotension in elderly hypertensive patients using 24hs ambulatory blood pressure monitoring

Introduction: Arterial hypotension (AH) caused by antihypertensive drugs is one of the most undesirable side effects in elderly hypertensive patients. Objective: The objective of the study was to evaluate the presence of AH and its relationship with the number of drugs administered in patients older than 65 years under antihypertensive treatment, using 24hs ambulatory blood pressure monitoring (ABPM). Sample and Method: We analyzed 12177 ABPM studies. Of them 327 was discarded for several reasons leaving a total sample of 10850. All the studies were carried out under the current technical criteria and abnormality values accepted by the HBP Societies. The subjects were divided into 3 groups: 65 to 69, 70 to 79 and more than 80 years and by tertiles of systolic blood pressure (SBP): up to 110, 120 and ≥130 mmHg. AH was considered in any of the four circumstances: diurnal systolic blood pressure (SBPD) or 24-hour SBP (SBP24) ≤100 mmHg. or daytime mean arterial pressure (MAPD) or 24-hr MAP (MAP24) ≤ to 73 mmHg. respectively.