Optimal Testing Intervals in the Squatting Test to Determine Baroreflex Sensitivity
The recently introduced “squatting test” (ST) utilizes a simple postural change to perturb the blood pressure and to assess baroreflex sensitivity (BRS). In our study, we estimated the reproducibility of and the optimal testing interval between the STs in healthy volunteers. Thirty-four subjects...
Збережено в:
| Видавець: | Інститут фізіології ім. О.О. Богомольця НАН України |
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| Дата: | 2014 |
| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізіології ім. О.О. Богомольця НАН України
2014
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| Назва видання: | Нейрофизиология |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/148354 |
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| Цитувати: | Optimal Testing Intervals in the Squatting Test to Determine Baroreflex Sensitivity / S. Ishitsuka, N. Kusuyama, M. Tanaka // Нейрофизиология. — 2014. — Т. 46, № 6. — С. 559-565. — Бібліогр.: 24 назв. — англ. |
Репозиторії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | The recently introduced “squatting test” (ST) utilizes a simple postural change to perturb
the blood pressure and to assess baroreflex sensitivity (BRS). In our study, we estimated the
reproducibility of and the optimal testing interval between the STs in healthy volunteers.
Thirty-four subjects free of cardiovascular disorders and taking no medication were
instructed to perform the repeated ST at 30-sec, 1-min, and 3-min intervals in duplicate in a
random sequence, while the systolic blood pressure (SBP) and pulse intervals were measured.
Baroreflex sensitivity was estimated by plotting reflex increases and decreases in the SBP and
succeeding pulse intervals during stand-to-squat and squat-to-stand maneuvers, respectively.
Correlations between duplicate BRS data at each testing interval were analyzed by the
Pearson’s correlation coefficient, while agreements were assessed by Bland-Altman plots.
Two measurements of BRS during stand-to-squat and squat-to-stand maneuvers demonstrated
significant correlations at both 1-min and 3-min intervals, while at 30-sec intervals correlation
was poor. Correlation coefficients became considerably greater in each maneuver as the
measurement interval was increased from 30 sec to 3 min. Our results suggest that the testing
interval in the ST should be at least 1 min long, but ideally it should be longer than or equal
to 3 min, to assess the baroreflex adequately. |
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