Optimal diagnostic thresholds for diagnosis of orthostatic hypotension with a ‘sit-to-stand test’

Background: Orthostatic hypotension (OH), defined as a decrease of blood pressure (BP) of 20/10 mm Hg (systolic/diastolic) on change in posture from supine to standing is seldom assessed in routine practice because of logistical constraints. A recent study reported a sit-to-stand decrease of 15/7 mm Hg as also having good diagnostic yield. We measured the prevalence & risk factors associated with OH with the new threshold of sit-to- stand of either ≥ 15 mm Hg in systolic (SBP) or ≥ 7 mm Hg in diastolic BP (DBP). Methods: We reviewed medical charts of patients being followed at Renal Hypertension Center, a referral centre for difficult to control hypertension. Sitting BP is measured after 5 minutes of resting, as an average of 5 measurements with an automated device. Standing BP is measured three times at one minute intervals and averaged. OH was determined on the basis of the difference in either average SBP or DBP. Demographic characteristics, comorbidities, medication details, laboratory values and BP measurements were extracted. Results: Data from 219 patients was extracted (see table). The overall difference in SBP (sitting - standing)was 0.94 and DBP was 2.1 mm Hg. 190 patients (87%) did not have OH, whereas 29 (13%) had OH using either SBP or DBP thresholds. The difference in SBP and DBP was 17 mm and 6 mm Hg in those with OH, versus 1.6 and 3 mm Hg amongst those without OH respectively. Higher SBP was significantly associated with OH; age, gender, diabetes, number and hypertension drug class were not. Conclusion: Amongst referred patients to a specialist hypertension clinic, the prevalence of OH using a threshold of 15/7 mm Hg was 13%. The new diagnostic threshold allows for easy assessment of OH.

Download Full-text

Inflight leg cuff test does not identify the risk for orthostatic hypotension after long-duration spaceflight

npj Microgravity ◽

10.1038/s41526-019-0082-3 ◽

2019 ◽

Vol 5 (1) ◽

Cited By ~ 2

Author(s):

Katelyn N. Wood ◽

Kevin R. Murray ◽

Danielle K. Greaves ◽

Richard L. Hughson

Keyword(s):

Heart Rate ◽

Orthostatic Hypotension ◽

Orthostatic Intolerance ◽

Peripheral Resistance ◽

Stand Test ◽

Cuff Deflation ◽

Sit To Stand ◽

Arterial Blood ◽

Long Duration ◽

Cuff Occlusion

Abstract Landing day symptoms from orthostatic hypotension after prolonged spaceflight can be debilitating, but severity of these symptoms can be unpredictable and highly individual. We tested the hypothesis that an impaired baroreflex response to an inflight leg cuff test could predict orthostatic intolerance on return to Earth. Eight male astronauts (44 ± 7 years of age (mean ± SD); mean mission length: 167 ± 12 days) participated in a standardized supine-to-sit-to-stand test (5 min–30s–3 min) pre- and postflight, and a 3 min thigh cuff occlusion test pre- and inflight with continuous monitoring of heart rate and arterial blood pressure. The arterial baroreflex was not changed inflight as shown by similar reductions in mean arterial pressure (MAP) response to leg cuff deflation (preflight −19 ± 2 mmHg vs. inflight −18 ± 5 mmHg). With the sit/stand test, the nadir of MAP was lower postflight (−17 ± 9 mmHg) than preflight (−11 ± 6 mmHg, p < 0.05). A greater increase in heart rate (25 ± 7; 16 ± 3 bpm) and decrease in stroke volume (−24 ± 11; −6 ± 4 mL) occurred with sit/stand postflight than leg cuffs inflight (p < 0.001). Inflight testing was influenced by elevated cardiac output resulting in a smaller drop in total peripheral resistance. Two of eight subjects exhibited orthostatic hypotension during the postflight stand test; their responses were not predicted by the inflight leg cuff deflation test. These results suggest that the baroreflex response examined by inflight leg cuff deflation was not a reliable indicator of postflight stand responses.

Download Full-text

REFERENCE VALUES FOR THE FIVE-REPETITION SIT-TO-STAND TEST: A DESCRIPTIVE META-ANALYSIS OF DATA FROM ELDERS

Perceptual and Motor Skills ◽

10.2466/pms.103.5.215-222 ◽

2006 ◽

Vol 103 (5) ◽

pp. 215 ◽

Cited By ~ 54

Author(s):

RICHARD W. BOHANNON

Keyword(s):

Reference Values ◽

Meta Analysis ◽

Stand Test ◽

Sit To Stand

Download Full-text

Effectiveness of Text Messaging as an Incentive to Maintain Physical Activity after Cardiac Rehabilitation: A Randomized Controlled Pilot Study

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph18126645 ◽

2021 ◽

Vol 18 (12) ◽

pp. 6645

Author(s):

Giulia Foccardi ◽

Marco Vecchiato ◽

Daniel Neunhaeuserer ◽

Michele Mezzaro ◽

Giulia Quinto ◽

...

Keyword(s):

Physical Activity ◽

Cardiac Rehabilitation ◽

Exercise Testing ◽

Text Messages ◽

Control Group ◽

Stand Test ◽

Randomized Controlled ◽

Sit To Stand ◽

Significant Difference

Although the efficacy of cardiac rehabilitation (CR) is proven, the need to improve patients’ adherence has emerged. There are only a few studies that have investigated the effect of sending text messages after a CR period to stimulate subjects’ ongoing engagement in regular physical activity (PA). A randomized controlled pilot trial was conducted after CR, sending a daily PA text message reminder to an intervention group (IG), which was compared with a usual care control group (CG) during three months of follow-up. Thirty-two subjects were assessed pre- and post-study intervention with GPAQ, submaximal iso-watt exercise testing, a 30 s sit-to-stand test, a bilateral arm curl test, and a final survey on a seven-point Likert scale. A statistically significant difference in the increase of moderate PA time (Δ 244.7 (95% CI 189.1, 300.4) minutes, p < 0.001) and in the reduction of sedentary behavior time (Δ −77.5 (95% CI 104.9, −50.1) minutes, p = 0.004) was shown when the IG was compared with the CG. This was associated with an improvement in heart rate, blood pressure, and patients’ Borg rating on the category ratio scale 10 (CR10) in iso-watt exercise testing (all p < 0.05). Furthermore, only the IG did not show a worsening of the strength parameters in the follow-up leading to a change of the 30 s sit-to-stand test with a difference of +2.2 (95% CI 1.23, 3.17) repetitions compared to CG (p = 0.03). The telemedical intervention has been appreciated by the IG, whose willingness to continue with regular PA emerged to be superior compared to the CG. Text messages are an effective and inexpensive adjuvant after phase 2 CR that improves adherence to regular PA. Further studies are needed to confirm these results in a larger patient population and in the long term.

Download Full-text

The outcome of a preoperative one-minute sit-to-stand test is associated with ventilation time after cardiac surgery

Scandinavian Cardiovascular Journal ◽

10.1080/14017431.2020.1866771 ◽

2020 ◽

pp. 1-7

Author(s):

Jan Gofus ◽

Martin Vobornik ◽

Vladimir Koblizek ◽

Marek Pojar ◽

Jan Vojacek

Keyword(s):

Cardiac Surgery ◽

Stand Test ◽

Ventilation Time ◽

Sit To Stand

Download Full-text

Hemodynamic Responses in Lower Limb Lymphedema Patients Undergoing Physical Therapy

Biology ◽

10.3390/biology10070642 ◽

2021 ◽

Vol 10 (7) ◽

pp. 642

Author(s):

Bianca Brix ◽

Olivier White ◽

Christian Ure ◽

Gert Apich ◽

Paul Simon ◽

...

Keyword(s):

Physical Therapy ◽

Lymphatic System ◽

Orthostatic Intolerance ◽

Hemodynamic Responses ◽

Stand Test ◽

Beneficial Effects ◽

Sit To Stand ◽

Complete Decongestive Therapy ◽

Before And After ◽

Baseline Values

Background: Lymphedema arises due to a malfunction of the lymphatic system, leading to extensive tissue swelling. Complete decongestive therapy (CDT), which is a physical therapy lasting for 3 weeks and includes manual lymphatic drainages (MLD), leads to fluid mobilization and increases in plasma volume. Here, we investigated hemodynamic responses induced by these fluid shifts due to CDT and MLD. Methods: Hemodynamic parameters were assessed continuously during a sit-to-stand test (5 min baseline, 5 min of standing, and 5 min of recovery). This intervention was repeated on days 1, 2, 7, 14, and 21 of CDT, before and after MLD. Volume regulatory hormones were assessed in plasma samples. Results: A total number of 13 patients took part in this investigation. Resting diastolic blood pressure significantly decreased over three weeks of CDT (p = 0.048). No changes in baseline values were shown due to MLD. However, MLD led to a significant decrease in heart rate during orthostatic loading over all epochs on therapy day 14, as well as day 21. Volume regulatory hormones did not show changes over lymphedema therapy. Conclusion: We did not observe any signs of orthostatic hypotension at rest, as well as during to CDT, indicating that lymphedema patients do not display an elevated risk of orthostatic intolerance. Although baseline hemodynamics were not affected, MLD has shown to have potential beneficial effects on hemodynamic responses to a sit-to-stand test in patients undergoing lymphedema therapy.

Download Full-text

Is the 1-Minute Sit-To-Stand Test a Good Tool to Evaluate Exertional Oxygen Desaturation in Chronic Obstructive Pulmonary Disease?

Diagnostics ◽

10.3390/diagnostics11020159 ◽

2021 ◽

Vol 11 (2) ◽

pp. 159

Author(s):

Ana L. Fernandes ◽

Inês Neves ◽

Graciete Luís ◽

Zita Camilo ◽

Bruno Cabrita ◽

...

Keyword(s):

Chronic Obstructive Pulmonary Disease ◽

Pulmonary Disease ◽

Intraclass Correlation ◽

Oxygen Desaturation ◽

Walking Distance ◽

Chronic Obstructive ◽

Cross Sectional ◽

Obstructive Pulmonary Disease ◽

Stand Test ◽

Sit To Stand

Background: Chronic obstructive pulmonary disease (COPD) is frequently associated with exertional oxygen desaturation, which may be evaluated using the 6-minute walking test (6MWT). However, it is a time-consuming test. The 1-minute sit-to-stand test (1STST) is a simpler test, already used to evaluate the functional status. The aim of this study was to compare the 1STST to the 6MWT in the evaluation of exertional desaturation. Methods: This was a cross-sectional study including 30 stable COPD patients who performed the 6MWT and 1STST on the same day. Six-minute walking distance (6MWD), number of 1STST repetitions (1STSTr), and cardiorespiratory parameters were recorded. Results: A significant correlation was found between the 6MWD and the number of 1STSTr (r = 0.54; p = 0.002). The minimum oxygen saturation (SpO2) in both tests showed a good agreement (intraclass correlation coefficient (ICC) 0.81) and correlated strongly (r = 0.84; p < 0.001). Regarding oxygen desaturation, the total agreement between the tests was 73.3% with a fair Cohen’s kappa (κ = 0.38; p = 0.018), and 93.33% of observations were within the limits of agreement for both tests in the Bland–Altman analysis. Conclusion: The 1STST seems to be a capable tool of detecting exercise-induced oxygen desaturation in COPD. Because it is a less time- and resources-consuming test, it may be applied during the outpatient clinic consultation to regularly evaluate the exercise capacity and exertional desaturation in COPD.

Download Full-text