[Hypertension and diabetes mellitus]

Area of Science:

• Cardiology
• Endocrinology
• Nephrology

Context:

• Hypertension is a frequent comorbidity in diabetes mellitus, significantly increasing mortality risk.
• Lowering blood pressure (BP) is generally associated with improved prognosis in diabetic patients.
• Recent evidence challenges the benefits of intensive BP lowering (< 130/80 mmHg) on overall mortality and cardiovascular outcomes.

Purpose:

• To evaluate the impact of intensive blood pressure lowering targets on mortality and cardiovascular complications in patients with diabetes.
• To analyze the risks associated with excessive blood pressure reduction in this population.
• To reconcile current guidelines with emerging clinical trial data regarding BP targets in diabetic hypertension.

Summary:

• Epidemiological studies support BP lowering in diabetic hypertension, but recent meta-analyses show no mortality or major cardiovascular benefit from intensive targets (< 130/80 mmHg), excluding stroke.
• Intensive BP lowering may increase adverse effects, including hypotension, especially in elderly patients or those with vascular complications.
• Japanese guidelines maintain a < 130/80 mmHg BP target due to high stroke incidence, despite conflicting international evidence.

Impact:

• Findings suggest a need to individualize BP targets in diabetic hypertension, balancing stroke prevention with risks of hypotension.
• This research informs clinical practice and guideline development for managing hypertension in diabetes.
• Highlights the importance of considering patient-specific factors and regional epidemiological data in treatment strategies.