Understanding Blood Pressure Stages
Blood pressure is measured in two numbers: systolic (pressure when the heart beats) and diastolic (pressure when the heart rests). The American Heart Association (AHA) 2017 guidelines classify readings below 120/80 mmHg as Normal, 120-129 systolic with diastolic below 80 as Elevated, 130-139/80-89 as High Blood Pressure Stage 1, 140 or higher / 90 or higher as Stage 2, and above 180/120 as a Hypertensive Crisis requiring immediate medical attention.
Hypertension is often called the "silent killer" because it rarely causes symptoms until serious damage has occurred. Regular monitoring, a low-sodium diet, aerobic exercise, maintaining a healthy weight, not smoking, and limiting alcohol are proven methods to manage or reduce blood pressure. Early-stage intervention can prevent progression to more severe hypertension.
Frequently Asked Questions
Below 120/80 mmHg is considered normal by AHA 2017 guidelines. A single elevated reading does not diagnose hypertension — consistent measurements over time are used for diagnosis.
A hypertensive crisis is when systolic exceeds 180 or diastolic exceeds 120 mmHg. This is a medical emergency. Call emergency services if accompanied by chest pain, shortness of breath, or vision changes.
A low-sodium diet (under 2,300 mg/day), 150 minutes of moderate aerobic exercise per week, reducing alcohol, quitting smoking, and weight loss can each contribute to meaningful blood pressure reductions.