Show MeA blood pressure reading of 106/73 is normal and generally a sign of good cardiovascular health. The top number (systolic pressure) of 106 sits comfortably below the 120 threshold for normal, and the bottom number (diastolic pressure) of 73 is well under the 80 cutoff. Per the 2017 ACC/AHA hypertension guidelines, normal blood pressure is below 120/80, so 106/73 falls squarely within that range. Most adults with this reading need no treatment or lifestyle intervention. However, context matters: the reading can still be too low for some people, and it means different things at age 25 versus age 75.
What the Two Numbers Actually Measure
Blood pressure is recorded as two numbers because the circulatory system has two distinct mechanical phases. The systolic number, written first, captures the peak pressure in your arteries at the instant your heart contracts and ejects blood. The diastolic number, written second, captures the pressure that remains while the heart relaxes and refills.
A reading of 106/73 means the arterial walls see a peak of 106 millimeters of mercury (mmHg) and a resting floor of 73 mmHg. The difference between them, 33 mmHg, is called the pulse pressure. That gap is a useful number in its own right and often gets ignored on home monitors and in casual conversation.
The unit, millimeters of mercury, is a historical leftover from mercury-filled gauges. Modern digital cuffs still report in mmHg so that readings match decades of clinical research. In plain terms: the first number is the squeeze, the second is the rest.
The Mechanism: Why 106/73 Happens Inside Your Arteries
Each heartbeat pushes a stroke volume of blood, roughly 70 milliliters in a resting adult, into the aorta. The aorta and larger arteries stretch to absorb that surge, then recoil to keep blood moving during the rest phase. This elastic buffering is why your diastolic pressure does not drop to zero between beats.
Three variables set the final numbers: how much blood the heart pumps per minute (cardiac output), how tightly the small arteries are squeezed (systemic vascular resistance), and how much blood sits in the system (blood volume). Blood pressure equals cardiac output multiplied by vascular resistance, a relationship that explains most readings.
A reading of 106/73 usually reflects a heart that pumps efficiently against relaxed, flexible arteries. Young, fit people typically show this pattern because their arterial walls recoil well and their resting cardiac output is modest. Endurance athletes can run even lower, often into the 90s over the 60s, without symptoms.
The baroreceptors in your neck arteries constantly fine-tune these numbers. When you stand up, these stretch sensors detect the brief pressure drop and trigger a reflex that tightens vessels within about one second. A normal 106/73 reading reflects that reflex working quietly in the background.
Where 106/73 Sits on Every Major Scale
The 106/73 reading is easiest to understand when you place it against the categories used in clinical practice. The table below uses the 2017 ACC/AHA framework, the system most U.S. clinicians apply. The European Society of Cardiology uses a similar but not identical set of cutoffs, and the two systems sometimes disagree at the margins.
| Category | Systolic (mmHg) | Diastolic (mmHg) | 106/73 status | |
|---|---|---|---|---|
| Low (hypotension) | under 90 | or | under 60 | Well above both |
| Normal | under 120 | and | under 80 | Fits both |
| Elevated | 120–129 | and | under 80 | Not applicable |
| Stage 1 hypertension | 130–139 | or | 80–89 | Not applicable |
| Stage 2 hypertension | 140 or higher | or | 90 or higher | Not applicable |
| Hypertensive crisis | over 180 | and/or | over 120 | Not applicable |
Reconciling the thresholds: a reading counts as hypertension if either number crosses its cutoff, even when the other is normal, which is why isolated systolic hypertension (high top, normal bottom) still requires attention. For 106/73, neither number comes close to any elevated category, and both clear the low-pressure floor by a wide margin.
One quantified comparison rarely shown in thin explainers: the number of adults in the United States with a reading in this normal range has been shrinking. Roughly 45 percent of U.S. adults had hypertension as of the 2017 guideline redefinition, up from about 32 percent under the older 140/90 cutoff. A normal reading like 106/73 now places a person in a smaller, healthier minority than it did a decade ago.
Age and Fitness Change What 106/73 Means
The same numbers carry different weight depending on who is holding the cuff. Age is the single biggest modifier because arterial stiffness rises steadily after about age 30, pushing systolic pressure upward by roughly 5 to 10 mmHg per decade in many adults.
In a 25-year-old, 106/73 is unremarkable and expected. In a 75-year-old, the same reading is unusually low and deserves a conversation with a clinician, because it may signal that medications are overcorrecting or that the heart is pumping less forcefully. The number is identical; the interpretation flips.
Fitness pushes readings downward in a healthy way. Regular aerobic exercise can lower resting systolic pressure by 5 to 8 mmHg in people with normal pressure, and trained endurance athletes often sit in the 100/60 range. Pregnancy also lowers blood pressure, typically by 5 to 15 mmHg in the first and second trimesters, so a pregnant woman who normally runs 115/75 might read 106/73 and be entirely normal.
Body position and time of day add smaller shifts. Blood pressure is usually highest in the morning, dips 10 to 20 percent during sleep (the nocturnal dip), and rises again on waking. A single 106/73 reading is a snapshot; the pattern across 24 hours is the fuller picture.
A 24-Hour Timeline of a 106/73 Reading
Blood pressure is not a fixed value. It moves through a predictable daily cycle, and 106/73 is best read as an average or a single point on that curve. The timeline below shows a typical day for a healthy adult whose average lands near 106/73.
| Time of day | Typical reading | What drives the change |
|---|---|---|
| 6–8 a.m. (waking) | 115–125/75–80 | Surge of cortisol and adrenaline on waking |
| 10 a.m.–12 p.m. | 110–118/72–78 | Morning activity, caffeine |
| Early afternoon | 105–112/70–75 | Post-lunch dip, digestion |
| Late afternoon–evening | 108–118/72–78 | Activity, stress, meals |
| 10 p.m. (pre-sleep) | 100–110/65–72 | Parasympathetic tone rises |
| 2–3 a.m. (deep sleep) | 90–100/55–68 | Nocturnal dip, lowest point |
| 4–6 a.m. (pre-wake) | 95–108/60–70 | Gradual climb begins |
Notice that a reading of 106/73 could represent the afternoon average or a mid-range value at almost any waking hour. This is why clinicians ask for multiple readings rather than trusting one. The 2020s shift toward home and ambulatory monitoring reflects the recognition that office readings capture only a slice of this curve.
When a Normal-Looking Reading Is Actually a Problem
The most common misconception is that 106/73 is always fine because it sits in the normal band. For most people it is, but the number alone does not tell the whole story. A reading in the normal range can coexist with symptoms that signal a problem.
The critical distinction is between asymptomatic normal pressure and symptomatic hypotension. If 106/73 comes with dizziness on standing, fainting, blurred vision, or unusual fatigue, the reading may be too low for that individual even though it falls in the textbook normal zone. Some people feel faint at 100/65 while others function perfectly at 90/55; the threshold is personal.
Orthostatic hypotension is a specific edge case worth knowing. It is defined as a drop of at least 20 mmHg systolic or 10 mmHg diastolic within three minutes of standing, per the 2017 ACC/AHA guidelines. Someone who reads 106/73 seated but drops to 85/60 on standing meets that definition and needs evaluation, even though the seated number looked healthy.
Seek medical attention promptly if a low reading is accompanied by:
- Fainting or near-fainting
- Chest pain or shortness of breath
- Confusion or difficulty concentrating
- Cold, clammy, or pale skin
- A sudden drop in urine output
- Severe dizziness when standing
A second misconception is that a lower number is always better. Below the normal floor of 90/60, organ perfusion can suffer. The kidneys, brain, and heart all depend on adequate pressure to receive blood. Pushing pressure too low with aggressive medication in an older adult can cause falls and kidney injury.
How to Measure 106/73 Accurately at Home
Many home readings of 106/73 are wrong in one direction or the other because of technique. A cuff that is too small can inflate the reading by 5 to 15 mmHg; a cuff placed over a sleeve can add a few points. Getting the method right matters more than the monitor's brand.
Follow these steps for a reading you can trust:
- Sit quietly for five minutes before measuring, with your back supported and feet flat.
- Rest your arm on a table so the cuff is at heart level.
- Use a correctly sized cuff; the bladder should wrap around 75 to 100 percent of your upper arm.
- Avoid caffeine, exercise, and smoking for 30 minutes beforehand.
- Take two readings one minute apart and average them.
- Measure at the same times each day, ideally morning and evening.
Poor technique inflates readings more often than it deflates them, so a home reading of 106/73 taken correctly is more reassuring, not less. If you consistently see values in this range and feel well, no action is needed. If you see it alongside symptoms, bring your log to a clinician rather than guessing.
The Bottom Line on 106/73
A reading of 106/73 is a normal, healthy blood pressure for most adults. It sits below the 120/80 normal threshold on both numbers, clears the low-pressure floor of 90/60 comfortably, and needs no treatment in an asymptomatic person. The pulse pressure of 33 mmHg is also unremarkable and within typical ranges.
What changes the interpretation is context, not the digits. Age, fitness, pregnancy, medications, and symptoms all shift what the same two numbers mean for a given person. A 75-year-old on blood pressure medication who reads 106/73 warrants a review; a 25-year-old runner who reads the same needs nothing. Measure carefully, look at the trend across days, and treat symptoms rather than the number alone.