Managing severe hypertension in children.

Area of Science:

• Pediatric Nephrology
• Pediatric Cardiology
• Critical Care Medicine

Background:

• Severe childhood hypertension is uncommon and often unrecognized.
• It is defined as systolic blood pressure (SBP) above the 95th centile + 12 mmHg.
• Urgent hypertension lacks end-organ damage, while emergency hypertension presents with signs like irritability or fits.

Purpose of the Study:

• To review current understanding and management of severe childhood hypertension.
• To propose evidence-based criteria for future clinical guidelines.
• To advocate for prospective databases for guideline evaluation.

Main Methods:

• Review of case series and existing clinical guidelines.
• Analysis of evidence regarding the controlled reduction of SBP in pediatric patients.
• Critique of a recent Pediatric Intensive Care Unit (PICU) study on hypertension management.

Main Results:

• Emergency hypertension requires prompt treatment to prevent neurological damage or death.
• SBP should be lowered gradually over approximately two days using intravenous agents.
• A staged reduction target is proposed: ≥6h, 12h, and ≥24h to stabilize cerebrovascular autoregulation.
• Current guidelines are often incomplete, with some recommending dangerous fixed-percentage SBP reduction without evidence.

Conclusions:

• Controlled, gradual SBP reduction is crucial in severe pediatric hypertension, especially with end-organ damage.
• Future guidelines should incorporate evidence-based criteria and be evaluated through prospective databases.
• A staged approach to SBP reduction over 48 hours is recommended before transitioning to oral therapy.