Sinus bradycardia associated with traumatic haemothorax

Area of Science:

• Trauma surgery
• Cardiology
• Thoracic medicine

Background:

• Chest deceleration injuries can cause significant thoracic trauma.
• Thoracic aorta injuries are a known complication of blunt chest trauma.
• Sinus bradycardia can occur in trauma patients, but its specific association with thoracic aorta injury requires further investigation.

Observation:

• A 39-year-old male sustained a closed chest deceleration injury.
• Clinical and radiological findings were consistent with thoracic aorta trauma.
• The patient developed sinus bradycardia.
• Bradycardia resolved following hemothorax drainage.

Findings:

• The case presents a previously unreported association between thoracic aorta trauma and sinus bradycardia.
• Hemothorax drainage led to the resolution of bradycardia.
• Direct compression of the vagus nerve by the hemothorax is hypothesized as the mechanism.

Implications:

• This finding suggests a potential mechanism for heart rate changes in thoracic trauma patients.
• Understanding this association may improve diagnosis and management of trauma-related bradycardia.
• Further research is warranted to confirm the vagus nerve compression hypothesis in similar cases.