Hypertension in India--definition, prevalence and evaluation

Area of Science:

• Cardiology
• Public Health
• Epidemiology

Background:

• High blood pressure (hypertension) is a significant cardiovascular risk factor globally.
• Hypertension prevalence is increasing in India, particularly in urban areas, contrasting with developed nations.
• Defining abnormal blood pressure levels remains a subject of expert debate.

Purpose of the Study:

• To outline the objectives for clinical evaluation of individuals with hypertension.
• To emphasize the importance of accurate blood pressure measurement techniques.
• To discuss appropriate screening and investigation strategies for hypertension.

Main Methods:

• Review of epidemiological and intervention studies defining hypertension thresholds (systolic BP ≥ 140 mm Hg and/or diastolic BP ≥ 90 mm Hg).
• Discussion of clinical evaluation objectives: confirming elevated BP, identifying contributing factors, assessing target organ damage, and guiding treatment.
• Emphasis on basic screening programs and guided investigation for secondary hypertension based on history and examination.

Main Results:

• Hypertension prevalence shows a concerning upward trend in India over the past 40 years.
• Accurate blood pressure measurement and targeted investigations are key for effective hypertension management.
• Secondary hypertension affects 1.1% to 5.7% of the general population, but universal investigation is not cost-effective.

Conclusions:

• Effective management of hypertension in India requires accurate diagnosis and tailored treatment strategies.
• A basic screening approach guided by clinical assessment is recommended for most hypertensive patients.
• Focusing investigations on secondary hypertension based on patient history and examination is crucial for cost-effectiveness.