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Understanding Blood Pressure Readings

Guide to systolic and diastolic numbers, normal ranges, what elevated and hypertension mean, and when to see a doctor.

Understanding Blood Pressure Readings

Key Facts:

Q:What do blood pressure numbers mean?

A:The top number (systolic) shows pressure when your heart beats. The bottom number (diastolic) shows pressure when your heart rests between beats. See our detailed guides: systolic blood pressure and diastolic blood pressure.

Q:What is a normal blood pressure reading?

A:A normal blood pressure reading is generally considered to be less than 120/80 mmHg.

Q:When should I consult a doctor about my blood pressure?

A:If your systolic pressure is consistently 130 or higher, or your diastolic pressure is consistently 80 or higher, you should consult a doctor.

Managing your cardiovascular health starts with understanding your numbers. The top number is your systolic blood pressure and the bottom is your diastolic blood pressure. Together they paint a complete picture of cardiovascular health. In this guide, we'll walk through everything you need to know about tracking and improving your heart health. For a quick reference, see our blood pressure chart.

Why Consistency Matters

Single readings are just snapshots. To truly understand your heart health, you need to look at trends over time. This is where digital tracking becomes invaluable.

The Morning Spike

Many people experience higher readings in the morning. This "morning surge" is important to track as it can indicate specific cardiovascular risks.

How to Use Your Monitor Correctly

Ensure your cuff is the right size and that you are sitting with both feet flat on the floor. Avoid talking or moving during the measurement.

By following these simple steps, you ensure that the data you provide to your healthcare team is as accurate as possible.

Medical Disclaimer

This article is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional before making any changes to your health regimen. Cardilog is not a medical device.

References

  1. 1.Whelton PK, Carey RM, Aronow WS, et al.. 2017 ACC/AHA/AAPA/ABC/ACPM/AGS/APhA/ASH/ASPC/NMA/PCNA Guideline for the Prevention, Detection, Evaluation, and Management of High Blood Pressure in Adults. Hypertension. 2018;71(6):e13-e115 Accessed April 2026.
  2. 2.Understanding Blood Pressure Readings. American Heart Association. 2024 Accessed April 2026.
  3. 3.Kario K. Morning Surge in Blood Pressure and Cardiovascular Risk. Hypertension. 2010;56(5):765-773 Accessed April 2026.
  4. 4.Shimbo D, Artinian NT, Basile JN, et al.. Self-Measured Blood Pressure Monitoring at Home: A Joint Policy Statement From the AHA and AMA. Circulation. 2020;142(4):e42-e63 Accessed April 2026.

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About Author

Cardilog Team is a contributor to Cardilog, focusing on heart health and digital monitoring solutions.

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