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Blood pressure j-curve: current concepts

Maciej Banach1, Wilbert S Aronow

  • 1Department of Hypertension, Chair of Nephrology and Hypertension, Medical University of Lodz, Poland. maciejbanach@aol.co.uk

Current Hypertension Reports
|October 12, 2012
PubMed

Insights

The blood pressure (BP) J-curve relationship suggests optimal outcomes within a specific range. Current evidence indicates caution when lowering BP significantly, especially in high-risk patients.

Area of Science:

  • Cardiology
  • Hypertension Research
  • Clinical Trials

Background:

  • The blood pressure (BP) J-curve debate, initiated in 1979, remains unresolved despite extensive research.
  • Observational studies suggest J-shaped relationships between BP and outcomes in general and high-risk hypertensive populations.
  • Existing randomized trials often lack statistical power or yield inconclusive results regarding the BP J-curve.

Purpose of the Study:

  • To review the current evidence on the blood pressure (BP) J-curve phenomenon in antihypertensive treatment.
  • To evaluate the implications of the BP J-curve for clinical practice in hypertensive patients.
  • To identify the need for further research to definitively answer questions surrounding the BP J-curve.

Main Methods:

  • Analysis of available observational studies on antihypertensive treatment and BP outcomes.
  • Review of randomized controlled trials investigating BP targets and patient outcomes.
  • Consideration of ongoing trials like SPRINT and ESH-CHL-SHOT for future insights.

Main Results:

  • Strong evidence suggests J-shaped relationships between BP and outcomes in various hypertensive groups.
  • High-risk populations, including those with coronary artery disease, diabetes, and elderly patients, show similar trends.
  • Current randomized trials are largely inconclusive due to limitations in statistical power.

Conclusions:

  • Lowering BP to 130-139/80-85 mmHg is currently a reasonable target for hypertensive patients.
  • Extreme BP reduction should be approached cautiously, particularly in high-risk individuals.
  • Further high-quality randomized trials are essential to fully elucidate the BP J-curve phenomenon.

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