Characterizing the Temporal Development of Cardiovascular Dysfunction in Response to Spinal Cord Injury
Bibliographic record
Abstract
Spinal cord injury (SCI) is associated with rapid and sustained impairments in cardiovascular function that ultimately cause an early onset of cardiovascular disease. We know remarkably little about the temporal progression of cardiovascular disturbances, but such an understanding is critical to inform clinical management and develop appropriate intervention strategies. To characterize the cardiovascular response to SCI, six male Wistar rats were instrumented with telemetry and assessed for continuous arterial blood pressure (BP), core body temperature, and heart rate (HR) 7 days before and up to 28 days after T3 SCI. Hemodynamic variables were averaged day by day and hour by hour. Spontaneously occurring autonomic dysreflexia (AD) was characterized by applying a novel algorithm to continuous BP and HR data, and induced AD was assessed weekly via the BP response to colorectal distension. Systolic BP was reduced at all time points after SCI compared with before SCI (p<0.003), except at 4 and 6 days post-injury. Core body temperature was reduced at 2 days post-SCI only (p=0.001). The nocturnal dip in BP and temperature observed pre-SCI was absent during the first 14 days post-SCI, but returned from 21 days post-SCI on (p<0.024). The frequency and severity of spontaneously occurring AD events were significantly less between days 6 and 10 post-SCI compared all other time points (p<0.037). The pressor response to colorectal distension was greater at 14, 21, and 28 days post-SCI compared with at 7 days post-SCI (all p<0.004). In conclusion, SCI induces rapid and profound alterations in basal hemodynamics and diurnal rhythms that partially recover by 14 days post-SCI. AD, on the other hand, is acutely present post-SCI, but the frequency and severity of AD events increase substantially from 14 days post-SCI on.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.004 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".