Cardiovascular Diseases Clinical Trial
Official title:
Cardiopulmonary Changes Following Spinal Cord Stimulation in Individuals With Spinal Cord Injury
The aim of this study is to examine the mechanisms of transcutaneous spinal cord stimulation (tSCS) for improving cardiovascular and pulmonary function in individuals with chronic motor-complete spinal cord injury (SCI) by measuring vascular related endothelial biomarkers, plasma catecholamines, and respiratory parameters.
DETAILED RESEARCH PROCEDURES (A) INFORMED CONSENT: Prospective participants will be provided with the study informed consent form and will be given at least 24 hours to review the form, ask questions, and discuss with whomever they like. (B) VISIT 1 -Screening Approximately 1 hour Individuals who agree to participate in the study will be invited for a screening assessment to confirm study eligibility. After the individual has provided informed consent, they will be assigned a unique study identification number and the information listed below will be collected. Screening questionnaires and assessments: - Inclusion/Exclusion Criteria confirmation - Demographics - Medical history and history of injury - Concomitant medication use - Weight and height - Previous allergies and adverse events to medications - Pregnancy screening will be performed - Internationals Standards for Neurological Classification of Spinal Cord Injury (ISNCSCI) exam (C) VISITS 2-5 -Baseline functional assessments, questionnaires, and cardiopulmonary assessments Approximately 2 hours per visit Enrolled participants will complete questionnaires after which a spirometry assessment for pulmonary function will be performed. Participants will be provided with a 24-hour Ambulatory Blood Pressure Monitor (24- ABPM) device to take home to record daily changes in cardiovascular parameters. Questionnaires (Visit 2): - Short-form (36) Health Survey (SF-36) - Autonomic Dysfunction following SCI (ADFSCI) questionnaire - Leisure Time Physical Activity Questionnaire after SCI (LTPAQ-SCI). - National Health Interview Survey - Chronic Conditions - American Thoracic Society (ATS) Adult Respiratory Disease Survey. - Tobacco Use Baseline cardiopulmonary and optional functional assessments (with and without tSCS) (Visits 2-5): - Spirometry testing (Visit 2) - 24-hour Ambulatory Blood Pressure and electrocardiogram Monitoring (24-hr ABP and ECG Monitor) (Visit 2) - Somatosensory evoked potentials (Visit 3, optional) - Transcranial Magnetic Stimulation (Visit 4, optional) - H-reflex (Visit 5, optional) - Compound Muscle Action Potentials (Peripheral nerve stimulation) (Visit 5, optional) - Muscle Ultrasound (Visit 5, optional) Participants will also be provided with instructions to prepare for Visit 3 or 6 (depending on whether they do the optional assessments), during which blood samples will be collected. Participants will be asked to: - Arrive for testing in a fasted state (fasted for 12 hours, but they may continue to drink water) - Not consume caffeine, recreational drugs, alcohol, smoking, or antihypotensive drug (e.g., midodrine) for 12 hours prior to their appointment - No strenuous exercise within 24 hours of the start of the study. (D) VISITS 3-5 or 6-8 (depending on whether or not the optional functional assessments were completed earlier in the study). Baseline cardiovascular assessments and blood draws. Approximately 3 hours In this session, participants will return the 24-hour ABP and ECG Monitor and undergo baseline cardiovascular assessments as well as the blood draws. The participant has the option of only taking part in one or all cardiovascular assessments. If the participant chooses to undergo more than one cardiovascular assessment they will be conducted on different visits. Cardiovascular Assessments: • Cardiovascular stress test (orthostatic stress test and/or vibrostimulation or DARS) Blood Draws: Four (4) blood draws will be taken: 1. At rest without tSCS 2. At rest with tSCS 3. During cardiovascular stress test without tSCS 4. During cardiovascular stress test with tSCS (E) TREATMENT VISITS (minimum 12 tSCS visits, depending on whether or not the optional functional and cardiovascular assessments were done earlier in the study) to completion of long-term intervention with tSCS intervention: Each session will last approximately 90 minutes (set-up AND at least 45min of tSCS treatment). Long-term tSCS is scheduled to last for a minimum of two times per week for 6 weeks. Following the completion of the intervention, participants will begin post-intervention questionnaires and cardiopulmonary assessments. Week to week variation in the number of scheduled sessions may vary due to varying circumstances (e.g., scheduling, transportation, participant health). However, the total number of sessions conducted will be the same as the participant's original goal. (F) SECOND TO LAST VISIT: Post-intervention questionnaires and cardiopulmonary assessment: Approximately 2 hours In this session, participants will complete post-intervention questionnaires and undergo post-intervention cardiopulmonary assessments. Questionnaires: - Short-form (36) Health Survey (SF-36) - Autonomic Dysfunction following SCI (ADFSCI) questionnaire - Leisure Time Physical Activity Questionnaire after SCI (LTPAQ-SCI). - National Health Interview Survey - Chronic Conditions - American Thoracic Society (ATS) Adult Respiratory Disease Survey. - Tobacco Use Cardiopulmonary Assessments: - Spirometry testing - 24-hour ABP and ECG Monitor (G) LAST VISIT: Post-intervention cardiovascular assessments and blood draws: Approximately 3 hours In this session, participants will undergo post-intervention cardiovascular assessments as well as the blood draws. Cardiovascular Assessments: - Carotid and cardiac ultrasound - Cardiovascular stress test (orthostatic hypotension stress and/or vibrostimulation or DARS) Blood Draws: Four (4) blood draws will be taken: 1. At rest without tSCS 2. At rest with tSCS 3. During a cardiovascular stress without tSCS 4. During a cardiovascular stress with tSCS ;
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