Blood pressure is measured at nearly every medical visit for good reason — it's one of the most reliable early indicators of cardiovascular risk. Yet the numbers often go unexplained. Let's change that.
What Do the Numbers Mean?
When your blood pressure is reported as 120/80 mmHg, you're looking at two measurements:
- Systolic (top number): The pressure in your arteries when your heart beats and pumps blood out.
- Diastolic (bottom number): The pressure when your heart rests between beats.
Both numbers matter.
Blood Pressure Categories
| Category | Systolic | | Diastolic | |---|---|---|---| | Normal | Less than 120 | and | Less than 80 | | Elevated | 120–129 | and | Less than 80 | | High (Stage 1) | 130–139 | or | 80–89 | | High (Stage 2) | 140+ | or | 90+ | | Crisis | 180+ | and/or | 120+ |
Why It Matters
Chronically elevated blood pressure — called hypertension — puts constant extra strain on your heart, arteries, kidneys, and brain. Over years, this leads to:
- Heart attack and heart failure
- Stroke
- Kidney disease
- Vision problems
The insidious part: hypertension rarely causes symptoms until damage is done. This is why we call it the "silent killer," and why regular monitoring is so important even when you feel fine.
Common Misconceptions
"I'd know if my blood pressure was high." Unfortunately, most people don't. That's exactly what makes it dangerous.
"One high reading means I have hypertension." Not necessarily. Blood pressure fluctuates throughout the day based on stress, caffeine, exercise, and even anxiety about being in a medical setting (called "white coat hypertension"). We typically want two to three elevated readings on separate visits before making a diagnosis.
"If I'm on medication, I'm cured." Medication controls blood pressure — it doesn't cure the underlying causes. Lifestyle remains critically important even on medication.
What You Can Do
The most impactful lifestyle changes for blood pressure:
- Reduce sodium — aim for less than 1,500 mg/day if elevated
- Exercise regularly — 150 minutes of moderate aerobic activity per week
- Maintain a healthy weight — even a 5–10 lb loss can meaningfully lower numbers
- Limit alcohol — no more than 1 drink/day for women, 2 for men
- Manage stress — chronic psychological stress elevates cortisol, which raises blood pressure
- Don't smoke
When to Call Us
Come in (or call us) if you're experiencing:
- Readings consistently above 140/90 at home
- Severe headache with high readings
- Chest pain, shortness of breath, or vision changes with high readings (call 911)
If you have a home blood pressure cuff, keep a log — we love seeing that data. It gives us a far more complete picture than a single office reading.
Have questions about your blood pressure? We're here. Call us at 408-384-4898 or send us a message through our patient portal.