Blood pressure chart: how to read a home log (7, 30, and 90 days)
A blood pressure chart is a picture of readings over time — systolic, diastolic, and often pulse. People search for a chart when they want to see whether home numbers are drifting, not when they want a single clinic snapshot. Blood Snap draws that picture from numbers you typed, spoke, or confirmed after a snap. It is not a blood pressure machine and it does not stamp “normal” or “high” on the chart.
What belongs on a home blood pressure chart
For a useful diary, log the same things each time: date and time, systolic (top number), diastolic (bottom number), and pulse if your home blood pressure monitor shows it. Note sitting vs standing only if your clinician asked. A chart of mixed, unlabeled situations is harder to discuss at a visit.
Blood pressure numbers move through the day. Morning and evening checks are a common home schedule. One high reading after coffee or a rushed cuff is not a trend.
7-day, 30-day, and 90-day views
- 7 days — useful while you are getting used to a cuff, or after a medicine change your clinician is watching.
- 30 days — the usual “month of home BP” many clinics ask for. Blood Snap’s 30-day blood pressure chart is this window of logged values plus average, min, and max.
- 90 days / 3 months — longer context for a follow-up visit. Export PDF or CSV from History so the chart is not trapped in the phone.
Averages in Blood Snap are arithmetic averages of what you saved. They are not a diagnostic mean arterial pressure and not a substitute for ambulatory monitoring.
How to keep the chart honest
- Same arm, same cuff, seated, feet on the floor, after a few quiet minutes when you can.
- Do not skip “bad” days — a diary that only stores good readings misleads you and your clinician.
- Confirm snap and voice digits against the blood pressure machine before save.
What a chart cannot do
A home chart cannot diagnose hypertension, hypotension, or “ideal blood pressure.” Published AHA and ESC/ESH categories live in how to read your monitor and ranges by age — educational pages, not in-app labels. If readings are very high with symptoms, use emergency services, not an app chart.
Log this in Blood Snap. Open Insights for 7 / 30 / 90-day blood pressure and glucose charts of your diary, then export for the visit.
Educational information with public guideline citations. Not medical advice and not a diagnosis. Blood Snap is a personal wellness diary — not a medical device, blood pressure machine, glucometer, or CGM. Always follow your clinician's advice.