Prevalence of Orthostatic Hypertension and its Association with Cerebrovascular Diagnoses in Patients with Suspected TIA and Minor Stroke

Farzaneh Barzkar, Phyo Kyaw Myint* (Corresponding Author), Chun Shing Kwok, Anthony Kneale Metcalf, John F Potter, Hamid Reza Baradaran

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Purpose We aimed to compare the rate of stroke, transient ischemic attack, and cerebrovascular disease diagnoses across groups of patients based on their orthostatic blood pressure response in a transients ischemic attack clinic setting. Materials and Methods We retrospectively analysed prospectively collected data from 3201 patients referred to a transient ischemic attack (TIA)/minor stroke outpatients clinic. Trained nurses measured supine and standing blood pressure using an automated blood pressure device and the patients were categorized based on their orthostatic blood pressure change into four groups: no orthostatic blood pressure rise, systolic orthostatic hypertension, diastolic orthostatic hypertension, and combined orthostatic hypertension. Then, four stroke physicians, who were unaware of patients' orthostatic BP response, assessed the patients and made diagnoses based on clinical and imaging data. We compared the rate of stroke, TIA, and cerebrovascular disease (either stroke or TIA) diagnoses across the study groups using Pearson's chi(2) test. The effect of confounders was adjusted using a multivariate logistic regression analysis. Results Cerebrovascular disease was significantly less common in patients with combined systolic and diastolic orthostatic hypertension compared to the "no rise" group [OR = 0.56 (95% CI 0.35-0.89]. The odds were even lower among the subgroups of patients with obesity [OR = 0.31 (0.12-0.80)], without history of smoking [OR 0.34 (0.15-0.80)], and without hypertension [OR = 0.42 (95% CI 0.19-0.92)]. We found no significant relationship between orthostatic blood pressure rise with the diagnosis of stroke. However, the odds of TIA were significantly lower in patients with diastolic [OR 0.82 (0.68-0.98)] and combined types of orthostatic hypertension [OR = 0.54 (0.32-0.93)]; especially in patients younger than 65 years [OR = 0.17 (0.04-0.73)] without a history of hypertension [OR = 0.34 (0.13-0.91)], and patients who did not take antihypertensive therapy [OR = 0.35 (0.14-0.86)]. Conclusion Our data suggest that orthostatic hypertension may be a protective factor for TIA among younger and normotensive patients.

Original languageEnglish
Article number161
Pages (from-to)161
Number of pages9
JournalBMC Cardiovascular Disorders
Volume22
Issue number1
Early online date9 Apr 2022
DOIs
Publication statusPublished - Dec 2022

Keywords

  • Stroke
  • Transient ischemic attack
  • Cerebrovascular disease
  • Orthostatic hypertension
  • Blood pressure

Fingerprint

Dive into the research topics of 'Prevalence of Orthostatic Hypertension and its Association with Cerebrovascular Diagnoses in Patients with Suspected TIA and Minor Stroke'. Together they form a unique fingerprint.

Cite this