Patient Guide — Blood Pressure
Home Blood Pressure Monitoring Guide
Home blood pressure readings are often more accurate than readings taken in a clinical setting. They help your care team make better treatment decisions and can catch patterns — like white-coat or masked high blood pressure — that office visits alone may miss.
Upper-Arm Cuff
Use an automatic upper-arm cuff. Do not use wrist or finger monitors.
Rest First
Sit quietly for 5 minutes before you measure. Do not talk during the reading.
Averages Matter
Your care team looks at the average of many readings, not one single number.
How to Use This Guide
Follow the steps in order the first few times. Once you know the routine, keep the printable log below by your monitor and bring it — or your monitor with stored readings — to every appointment.
Choosing the Right Monitor
- ✓ Use an automatic (digital) upper-arm cuff monitor. Do not use wrist or finger monitors.
- ✓ The cuff must fit your arm. The cuff bladder should wrap around at least 80% of your upper arm.
- ✓
Check your cuff size before you buy Most standard cuffs fit arms up to about 17 inches (42 cm) around. If your upper arm is larger, you need a large or extra-large cuff. A cuff that is too small gives falsely high readings — the most common cause of wrong readings at home. Ask us which size you need.
- ✓ Look for a validated device at www.validatebp.org or ask your pharmacist.
- ✓ Choose a monitor with built-in memory that stores your readings.
- ✓ Bring your monitor to your visit so we can compare it with our office equipment.
Before You Measure
- ✓ Empty your bladder.
- ✓ No smoking, caffeine, or exercise for at least 30 minutes before measuring.
- ✓ Sit quietly and relax for at least 5 minutes before taking a reading.
- ✓ Do not talk or use your phone during the rest period or while measuring.
How to Sit and Position the Cuff
- ✓ Sit in a straight-backed chair (like a dining chair), not on a couch or bed.
- ✓ Keep both feet flat on the floor. Do not cross your legs.
- ✓ Put the cuff on your bare upper arm (not over clothing). The bottom edge of the cuff should sit just above the bend of your elbow.
- ✓ Rest your arm on a flat surface so the middle of the cuff is at heart level.
- ✓ Sit still and do not talk while the machine takes your reading.
When and How Often to Measure
- ✓ Morning: within 1 hour of waking, after using the bathroom, and before taking any blood pressure medicine or eating breakfast.
- ✓ Evening: before going to bed.
- ✓ Take 2 readings each session, at least 1 minute apart. That is 4 readings a day.
How Many Days to Monitor
- ✓ Best: 7 days in a row (28 readings total).
- ✓ Minimum: 3 days (12 readings) if 7 days is not possible.
- ✓ Best timing: the week before your next appointment, or for 2 weeks after a medicine change.
- ✓ Once your blood pressure is stable and well controlled, 1–3 days per week may be enough — ask your care team.
These home monitoring schedules are based on American Heart Association guidelines. They are guidelines, not strict rules. Do not worry about checking constantly — a few good readings around the times above are what we need. Checking too often can cause needless worry.
Record Your Readings
Write down every reading with the date, time, and which arm you used. Bring your log — or your monitor with stored readings — to every appointment. Print this page to use the log below.
| Date | Time | Arm (left / right) | Reading 1 | Reading 2 |
|---|---|---|---|---|
Tip: take 2 readings each session, at least 1 minute apart, and write down both.
What the Numbers Mean
Blood pressure is written as two numbers, for example 120/80 mmHg. The top number (systolic) is the pressure when your heart beats. The bottom number (diastolic) is the pressure when your heart rests between beats. Your care team looks at the average of all your readings, not one single reading.
| Category | Top number (systolic) | Bottom number (diastolic) |
|---|---|---|
| Normal | Below 120 | Below 80 |
| Elevated | 120–129 | Below 80 |
| High (Hypertension) | 130 or higher | 80 or higher |
A reading in the "High" range, seen again and again, means you likely have high blood pressure (hypertension). This is something to talk about with us at your next visit. It is different from the urgent numbers in the "When to Get Help" section below.
These categories are a general guide. Your care team will tell you your personal target.
Go to the ER Now
Go to the ER or call 911 right away if you have any of these warning signs — no matter what your blood pressure number is. Do not wait to check your blood pressure. Do not call the office or send a message. Go to the ER or call 911.
- Chest pain or tightness
- Trouble breathing or shortness of breath
- Sudden weakness or numbness in the face, arm, or leg (especially on one side)
- Trouble speaking or understanding words
- Sudden vision changes (blurry vision, double vision, or loss of vision)
- A sudden, severe headache — the worst of your life — OR a headache with confusion, vision changes, weakness, or trouble speaking *
- Severe back or stomach pain
- Confusion or trouble thinking clearly
- Seizures
- Nausea or vomiting along with any of the signs above
These are even more urgent if your blood pressure is also 180/120 or higher.
High Number, But You Feel Fine (Same Day)
If your blood pressure is 180/120 or higher but you feel well and have none of the warning signs above:
- Sit quietly for 5 minutes, then check again.
- If it is still 180/120 or higher, call the office at 203-225-0506.
- If you do not hear back within 2 hours, go to an urgent care or the ER to be checked.
Still High Over Several Days
If your blood pressure stays above 160/100 on more than one reading over several days, send us a message through the patient portal. We will get back to you.
What If I Have a Headache?
Not all headaches are caused by high blood pressure. Here is a simple guide:
- Headache with a reading of 180/120 or higher AND any of these — confusion, vision changes, weakness or numbness, trouble speaking, or a seizure: go to the ER or call 911 now.
- Headache with a reading of 180/120 or higher, but no other symptoms: rest 5 minutes and check again. If it stays that high, call the office the same day at 203-225-0506.
- Headache with a reading below 180/120: this is unlikely to be from your blood pressure. Treat it as you would a usual headache. If it is severe, sudden, or unlike any headache you have had before, get medical care.
When in doubt, or if anything feels wrong, treat it as an emergency and call 911.
Common Mistakes to Avoid
- ✗ Measuring over clothing
- ✗ Using a cuff that is too small or too large
- ✗ Talking, texting, or moving during the reading
- ✗ Crossing your legs
- ✗ Not resting for 5 minutes first
- ✗ Measuring right after exercise, caffeine, or smoking
- ✗ Rounding numbers up or down — write the exact reading
Tips for Success
- ✓ Measure at the same times each day.
- ✓ Use the same arm each time. If arms differ, use the arm with the higher reading.
- ✓ Do not worry about one high or low reading. The average over several days matters most.
- ✓ Bring your monitor to your visit so we can compare it with our office equipment.