Postural Cardiovascular Variability: A Perspective on Cerebrovascular Diseases, Sex and Seasons

Abstract

Purpose: The purpose of this study was to study how seasons (colder seasons and warmer seasons) affects the responses of hemodynamic mechanisms and heart rate variability during a sit-to-stand test in patients with stroke and participants without a stroke across sex and seasons. Methods: Through a sit-to-stand test (5 min of sitting followed by 5 min of standing), we examined cardiovascular responses in patients with a stroke (n= 16) and participants without a stroke (n=25), age >55 years, in two seasons. We continuously recorded via a Task Force Monitor® device beat to beat systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR), stroke index (SI) and cardiac index (CI), and low frequency and high frequency of the heart rate variability (HRV). Results: During the resting phase, DBP (delta: +15.1, SE: ±3.75, [mmHg], p

Date of Award	2021
Original language	English
Awarding Institution	Medical University Graz
Supervisor	Oleksandr Bondarenko (Supervisor), Franz Fazekas (Supervisor) & Nandu Goswami (Supervisor)