Cardiovascular outcome stratification using the ankle-brachial pressure index

Area of Science:

• Vascular Medicine
• Cardiology
• Epidemiology

Background:

• Peripheral arterial disease (PAD) is a significant risk factor for cardiovascular morbidity and mortality.
• The Ankle-Brachial Pressure Index (ABPI) is a non-invasive diagnostic tool for PAD.
• Early identification of high-risk PAD patients is crucial for effective management.

Purpose of the Study:

• To determine the association between baseline Ankle-Brachial Pressure Index (ABPI) levels and clinical outcomes in patients with PAD.
• To stratify PAD patient risk based on ABPI measurements at diagnosis.
• To inform cardiovascular risk management strategies for PAD patients.

Main Methods:

• Analysis of the Limburg PAOD Longitudinal Study dataset (n=3649, 7.2 years follow-up).
• ABPI measured using handheld Doppler devices and categorized into 6 levels.
• Cox proportional hazard models used to assess associations between ABPI categories and outcomes (limb ischemia, cardiovascular morbidity, mortality).

Main Results:

• Patients with ABPI <1.00 faced a significantly higher risk of progressive limb ischemia (HR 3.3-9.0) compared to those with ABPI ≥1.10.
• A baseline ABPI <0.90 was associated with an increased risk of non-fatal cardiovascular disease (HR 1.5-1.7).
• Severely reduced ABPI (<0.70) indicated a high risk of cardiovascular or other cause mortality (HR 2.3).

Conclusions:

• The Ankle-Brachial Pressure Index (ABPI) is a valuable tool for identifying PAD patients at high risk for adverse cardiovascular outcomes.
• ABPI stratification can guide the implementation of strict cardiovascular risk management protocols.
• Lower ABPI values are strong predictors of poor prognosis in PAD patients.