What is the clinical evidence from this study?

Study design: Observational. Population: Acute spinal cord injury (n=71). Intervention: Severe cervical cord injury vs. Milder cervical or thoracolumbar injury. Primary outcome: Persistent bradycardia (p=<0.00001).

What question did this study set out to answer?

This study aims to evaluate the incidence and severity of cardiovascular abnormalities following acute spinal cord injury.

April 21, 2026

Cardiovascular abnormalities accompanying acute spinal cord injury in humans: Incidence, time course and severity

Q: What are the key findings of this study?

Severe cervical spinal cord injury was universally associated with persistent bradycardia (100%) and higher rates of hypotension (68%) compared to milder or thoracolumbar injuries (p<0.00001).

Q: What question did this study set out to answer?

This study aims to evaluate the incidence and severity of cardiovascular abnormalities following acute spinal cord injury.

Key Result

Severe cervical spinal cord injury was universally associated with persistent bradycardia (100%) and higher rates of hypotension (68%) compared to milder or thoracolumbar injuries (p<0.00001).

Key Points

This study aims to evaluate the incidence and severity of cardiovascular abnormalities following acute spinal cord injury.
Evaluated 71 consecutive patients with acute spinal cord injury.
Categorized injuries into severe cervical, milder cervical, and thoracolumbar.
Assessed cardiovascular abnormalities including bradycardia and arrhythmias.
Persistent bradycardia observed in all severe cervical injury patients (p < 0.00001).
Hypotension recorded in 68% of severe cervical injuries (p < 0.00001), with marked sinus slowing in 71%.
Arrhythmias peaked on day 4 and resolved within 2 to 6 weeks post-injury.

Study Design

Type

Observational (n=71)

Structured PICO

Population

71 consecutive patients with acute injury to the spinal cord (31 severe cervical, 17 milder cervical, 23 thoracolumbar)

Outcome

Frequency of cardiovascular abnormalities (bradycardia, sinus slowing, hypotension, supraventricular arrhythmias, primary cardiac arrest)

Acute severe cervical spinal cord injury is regularly accompanied by transient but potentially life-threatening arrhythmias and hemodynamic abnormalities during the first 14 days, driven by acute autonomic imbalance.

Main Result

Absolute Event Rate: 100% vs 13%

p-value: p=<0.00001

Abstract

The frequency of cardiovascular abnormalities was evaluated in 71 consecutive patients with acute injury to the spinal cord. Persistent bradycardia was universal in all 31 patients with severe cervical cord injury and less common in milder cervical injury (6 of 17) or thoracolumbar injury (3 of 23) (p less than 0.00001). Marked sinus slowing (71 versus 12 versus 4%, respectively, p less than 0.00001), hypotension (68 versus 0 versus 0%, p less than 0.00001), supraventricular arrhythmias (19 versus 6 versus 0%, p = 0.05) and primary cardiac arrest (16 versus 0 versus 0%, p less than 0.05) were significantly more frequent in the severe cervical injury group. The frequency of bradyarrhythmias peaked on day 4 after injury and gradually declined thereafter. All observed abnormalities resolved spontaneously within 2 to 6 weeks. The primary mechanism underlying these observations appears to involve the acute autonomic imbalance created by the disruption of sympathetic pathways located in the cervical cord. Acute severe injury to the cervical spinal cord is regularly accompanied by arrhythmias and hemodynamic abnormalities not found with thoracolumbar cord trauma. These abnormalities are limited to the first 14 days after injury, a period in which life-threatening disturbances must be anticipated.