Understanding Blood Pressure

Introduction

Blood pressure (BP) is the force exerted by circulating blood on the walls of blood vessels. It is a key indicator of cardiovascular health.

How is Blood Pressure Measured?

Blood pressure is recorded as two numbers:

  • Systolic pressure (top number): The pressure in your arteries when your heart beats.
  • Diastolic pressure (bottom number): The pressure in your arteries when your heart rests between beats.

A measurement is typically shown as 120/80 mmHg , with mmHg representing millimeters of mercury.

Blood Pressure Categories

According to clinical guidelines, blood pressure levels are categorized as follows:

  • Normal: Less than 120/80 mmHg
  • Elevated: Systolic between 120-129 mmHg and diastolic less than 80 mmHg
  • Hypertension Stage 1: Systolic 130-139 mmHg or diastolic 80-89 mmHg
  • Hypertension Stage 2: Systolic 140 mmHg or higher or diastolic 90 mmHg or higher
  • Hypertensive Crisis: Systolic over 180 mmHg and/or diastolic over 120 mmHg (seek emergency care)

Why is High Blood Pressure Dangerous?

Chronic high blood pressure (hypertension) can lead to serious health issues, such as:

  • Heart disease and heart attack
  • Stroke
  • Kidney failure
  • Vision problems
  • Peripheral artery disease

How to Maintain Healthy Blood Pressure?

1. Lifestyle Changes:

  • Healthy diet: Low salt, high in fruits, vegetables, and whole grains
  • Regular exercise: At least 150 minutes per week of moderate activity
  • Weight management: Maintain a healthy weight
  • Reduce alcohol and quit smoking: Both contribute to high BP
  • Manage stress: Techniques like meditation and deep breathing help

2. Medication If Necessary:

Doctors may prescribe medications like:

  • Diuretics
  • ACE inhibitors
  • Beta-blockers
  • Calcium channel blockers

Controlling blood pressure reduces the risk of cardiovascular diseases and complications.

Summary

Monitoring and managing blood pressure is essential for overall cardiovascular health. Regular check-ups, a healthy lifestyle, and medications (if necessary) can help maintain optimal blood pressure levels.

Source recommendations

1. American Heart Association Guidelines on Hypertension

  1. https://www.heart.org/en/health-topics/high-blood-pressure
  2. https://www.ahajournals.org/doi/10.1161/hyp.0000000000000065
  3. https://www.heart.org/
  4. https://professional.heart.org/en/science-news/2017-hypertension-clinical-guidelines
  5. https://www.heart.org/-/media/Files/Professional/Quality-Improvement/Pain-Management/AHA-GUIDELINEDRIVEN-MANAGEMENT-OF-HYPERTENSION--AN-EVIDENCEBASED-UPDATE.pdf

2. European Society of Cardiology/European Society of Hypertension Guidelines on Hypertension

  1. https://www.escardio.org/Guidelines/Clinical-Practice-Guidelines/Elevated-Blood-Pressure-and-Hypertension
  2. https://pubmed.ncbi.nlm.nih.gov/37345492/
  3. https://www.ejinme.com/article/S0953-6205(24)00238-3/fulltext
  4. https://academic.oup.com/eurheartj/article/45/38/3912/7741010
  5. https://www.acc.org/Latest-in-Cardiology/Articles/2024/02/05/11/43/2023-ESH-Hypertension-Guideline-Update

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