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In this study, the SCI patients were sub-grouped on the basis of symptoms into symptomatic and asymptomatic groups and measured HRV during resting and tilt up tests to compare their cardiovascular autonomic functions.
In study protocol and the subjects were asked to lie down quietly for 5 minutes, closing their eyes and avoiding talking, moving hand, legs and body, and coughing during the test. R-R interval and blood pressure were measured beat-to-beat using Finometer® PRO (Finapres Medical Systems, Amsterdam, Netherlands) for 6 minutes each in two positions, supine and 60-degree angle on the tilt table.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| non-OH group | without orthostaric hypotension in spinal cord injuries | ||
| symptomatic OH group | Symptomatic individuals in a patient population diagnosed with orthostatic hypotension (Symptom : dizziness, visual disturbance, nausea and headache) | ||
| asymptomatic OH group | Asymptomatic individuals in a patient population diagnosed with orthostatic hypotension |
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| Measure | Description | Time Frame |
|---|---|---|
| Differences of heart rate variability between groups (OH vs non-OH, asymptomatic-OH vs symptomatic-OH group) | mean HR (heart rate), mean RR(RR interval), RMSSD (mean square of the successive R-R interval differences), SDNN (standard deviation of normal-to-normal interval), LF (low frequency) domain, HF(High frequency) domain | at the test time (15minutes) |
| Logistic regression analysis of heart rate variability variables according to OH and presence of symptom | the investigators conducted logistic regression analysis to evaluate the significance and impact of HRV variables associated with orthostatic hypotension and its symptoms in spinal cord injury patients. | at the test time (15minutes) |
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Inclusion Criteria:
Exclusion Criteria:
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Individuals with SCI were recruited from a single university-affiliated rehabilitation hospital.
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| Name | Affiliation | Role |
|---|---|---|
| PARK HAERI, Master | Pusan National University Yangsan Hospital | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Pusan National University Yangsan Hospital, Geumo-ro 20, Mulgeum-eup | Yangsan | Gyeongsangnam-do | 50612 | South Korea |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 30904574 | Background | Stampas A, Zhu L, Li S. Heart rate variability in spinal cord injury: Asymptomatic orthostatic hypotension is a confounding variable. Neurosci Lett. 2019 Jun 11;703:213-218. doi: 10.1016/j.neulet.2019.03.020. Epub 2019 Mar 20. |
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| ID | Term |
|---|---|
| D013119 | Spinal Cord Injuries |
| D007024 | Hypotension, Orthostatic |
| ID | Term |
|---|---|
| D013118 | Spinal Cord Diseases |
| D002493 | Central Nervous System Diseases |
| D009422 | Nervous System Diseases |
| D020196 | Trauma, Nervous System |
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| D014947 | Wounds and Injuries |
| D054971 | Orthostatic Intolerance |
| D054969 | Primary Dysautonomias |
| D001342 | Autonomic Nervous System Diseases |
| D007022 | Hypotension |
| D014652 | Vascular Diseases |
| D002318 | Cardiovascular Diseases |