Prognostic impact of hypertension grading

Area of Science:

• Cardiology
• Hypertension Research
• Clinical Epidemiology

Background:

• Hypertension guidelines categorize blood pressure (BP) severity using defined cut-offs.
• Investigating the prognostic significance of different hypertension grades is crucial for risk stratification.

Purpose of the Study:

• To evaluate the prognostic impact of hypertension Grades 1, 2, and 3 on major cardiovascular events.
• To compare the cardiovascular risk associated with different hypertension severity levels.

Main Methods:

• A 10-year follow-up of 3,150 untreated hypertensive patients without prior cardiovascular disease.
• Utilized 24-hour ambulatory blood pressure (BP) monitoring alongside clinic BP measurements.
• Assessed major adverse cardiovascular events, including myocardial infarction, stroke, cardiovascular death, and heart failure hospitalization.

Main Results:

• No significant difference in cardiovascular event rates between Grade 1 and Grade 2 hypertension.
• Grade 3 hypertension showed a higher event rate (1.93 per 100 patient-years).
• After adjusting for covariates, Grade 3 risk was significant compared to Grade 1, but lost significance when adjusted for 24-hour ambulatory systolic BP.

Conclusions:

• Hypertension Grades 1 and 2 do not show a significant difference in relative cardiovascular event hazard.
• Grade 3 hypertension (clinic BP ≥180/110 mmHg) is associated with increased cardiovascular risk.
• This elevated risk in Grade 3 is linked to higher 24-hour ambulatory BP levels.