Interarm blood pressure differences predict target organ damage in type 2 diabetes

Area of Science:

• Cardiovascular Medicine
• Endocrinology
• Nephrology
• Ophthalmology
• Vascular Biology

Background:

• Type 2 diabetes mellitus (T2DM) patients face elevated risks of atherosclerotic disease.
• Accurate blood pressure measurement is critical for managing hypertension in diabetic individuals.
• Interarm difference (IAD) in blood pressure may indicate underlying vascular issues.

Purpose of the Study:

• To determine the prevalence of interarm blood pressure difference (IAD) in a large cohort of type 2 diabetes patients.
• To investigate the association between IAD and cardiovascular risk factors.
• To explore the relationship between IAD and subclinical organ damage, including nephropathy, retinopathy, left ventricular hypertrophy, and vascular damage.

Main Methods:

• A total of 800 consecutive patients diagnosed with type 2 diabetes mellitus were enrolled.
• Blood pressure was measured simultaneously and bilaterally using an automated device.
• Statistical analyses, including adjusted odds ratios, were employed to assess associations.

Main Results:

• Interarm difference in systolic blood pressure was highly prevalent in the studied diabetic population.
• Patients with a systolic IAD of ≥5 mm Hg and ≥10 mm Hg demonstrated a significantly increased risk of vascular damage (aORs 1.73 and 2.49, respectively).
• Higher pulse pressure was observed in patients with significant IAD.

Conclusions:

• Interarm blood pressure difference is common in patients with type 2 diabetes.
• Even a mild systolic IAD (≥5 mm Hg) is associated with increased vascular damage.
• Accurate and routine measurement of IAD is essential to prevent underdiagnosis and undertreatment of hypertension in diabetic patients.