Brachial gradient in cardiac surgical patients

Area of Science:

• Cardiovascular Surgery
• Vascular Medicine
• Diagnostic Imaging

Background:

• Preoperative assessment of blood pressure differences between arms is crucial for cardiac surgery patients.
• Understanding the clinical implications of brachial blood pressure gradients can inform surgical planning and risk stratification.

Purpose of the Study:

• To investigate the association between preoperative brachial blood pressure gradient and the presence of carotid and proximal aortic atherosclerotic disease.
• To determine if a brachial blood pressure gradient is a predictor of cerebrovascular events or mortality in patients undergoing heart surgery.

Main Methods:

• Prospective study comparing 53 patients with a brachial blood pressure gradient (Group 1) to 175 patients without (Group 2).
• All patients underwent preoperative carotid duplex interrogation and intraoperative epiaortic scanning.
• Risk factors, carotid stenosis, and aortic disease severity were compared between groups.

Main Results:

• Patients with a brachial gradient (Group 1) had significantly higher rates of peripheral vascular disease (P<0.0001) and cerebrovascular symptoms (P=0.0196).
• Severe carotid stenosis (>80%) was more prevalent in Group 1 (41.5%) vs. Group 2 (13.7%) (P<0.0001).
• Severe proximal aortic disease was also more common in Group 1 (39.6%) vs. Group 2 (10.8%) (P<0.0001).

Conclusions:

• A preoperative brachial blood pressure gradient serves as a significant marker for increased carotid and proximal atherosclerotic aortic disease.
• Preoperative carotid Doppler and intraoperative epiaortic ultrasound are strongly recommended for patients with a brachial gradient.
• Consideration of a preoperative arch study during catheterization is advised for comprehensive risk assessment.