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Upper Extremity Blood Pressure Difference in Patients Undergoing Carotid Revascularisation
A Huibers1, J Hendrikse2, M M Brown3
1Department of Vascular Surgery, University Medical Centre Utrecht, The Netherlands.
Measuring inter-arm blood pressure differences is crucial for patients with carotid artery disease. Significant differences may indicate subclavian artery stenosis, impacting accurate blood pressure monitoring and potentially affecting outcomes.
Area of Science:
- Vascular Medicine
- Cardiology
- Interventional Neurology
Background:
- Accurate blood pressure (BP) regulation is vital for patients with carotid artery atherosclerotic disease.
- Subclavian artery stenosis (SAS) can lead to underestimation of systemic BP in these patients.
- Inter-arm BP differences may mask or indicate underlying SAS.
Purpose of the Study:
- To determine the prevalence of inter-arm BP differences in patients undergoing carotid intervention.
- To assess the association between inter-arm BP differences and ipsilateral significant SAS.
- To evaluate the clinical outcomes related to SAS in this patient cohort.
Main Methods:
- Bilateral BP measurements and vascular imaging (CTA, MRA) of subclavian and innominate arteries were performed in 182 symptomatic carotid stenosis patients.
- Patients were analyzed based on systolic BP (SBP) difference cutoffs: ≥10 to <15 mmHg, ≥15 to <20 mmHg, and ≥20 mmHg.
- Significant SAS was defined as >50% diameter reduction.
Main Results:
- 21% of patients (39/182) exhibited an inter-arm SBP difference >15 mmHg.
- An inter-arm SBP difference of ≥20 mmHg was strongly associated with unilateral SAS (RR 11.8), with 98% specificity.
- Patients with SAS had a significantly longer hospital stay (5.0 vs. 2.7 days).
Conclusions:
- Measuring inter-arm BP differences is clinically necessary in patients undergoing carotid revascularization.
- This measurement is particularly important post-operatively to prevent cerebral hyperperfusion.
- Inter-arm BP differences can serve as a valuable, non-invasive indicator of SAS.
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Special considerations while measuring blood pressure
Monitoring Both Arms:
Monitoring BP in both arms during the initial assessment is advisable, as the systolic value may differ by five to ten mm Hg between arms. For subsequent BP assessments, use the arm with the higher reading.
Pre-Procedural Guidelines for Assessing Blood Pressure
Sites for measuring blood pressure
The Brachial Artery: Primary Site for Blood Pressure Measurement
Peripheral Arterial Disease II: Clinical Manifestations and Diagnostic Evaluation
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