Blood pressure and the dental appointment: the ACC/AHA categories, the ADA's 160/100 line, and the number nobody actually set

What it says#

There are two separate documents here, and confusing them is the usual source of the argument at the front of the operatory. One sets the medical categories. The other sets what a dental office does about them, and it is not written by the cardiologists.

The categories first. The 2025 AHA/ACC guideline for the prevention, detection, evaluation and management of high blood pressure in adults was published on August 14, 2025 in JACC, Circulation and Hypertension, and its own abstract says it retires and replaces the 2017 ACC/AHA guideline. The American Heart Association's release on the same day states that the blood pressure criteria remain the same as the 2017 guideline: normal blood pressure is less than 120/80 mm Hg; elevated blood pressure is 120 to 129 mm Hg and under 80 mm Hg; stage 1 hypertension is 130 to 139 mm Hg or 80 to 89 mm Hg; and stage 2 hypertension is 140 mm Hg or higher or 90 mm Hg or higher. The ADA's hypertension topic page prints the same four rows as its Table 1, attributed to the 2017 categories, and adds a fifth row for hypertensive crisis at over 180 and/or over 120. What did change in 2025 is around the edges: the guideline adopted the PREVENT risk calculator in place of the pooled cohort equations, made the urine albumin to creatinine ratio a test for all patients with high blood pressure, and replaced the term hypertensive urgency with severe hypertension for patients presenting above 180/120 without acute target-organ damage.

Now the dental part. The ADA's topic page reprints, as its Table 3, the proposed blood pressure thresholds and management algorithms from the ADA Practical Guide to Patients with Medical Conditions for elective and emergency dental care in adults older than 18. Below 160/100 there is no modification for either elective or emergency care. Above 160/100, the instruction for elective care is to repeat the measurement; if it is lowered, or within written guidance from a physician, proceed; if confirmed, no elective dental treatment, and the patient should seek consultation with a physician. For emergency care above 160/100, repeat the measurement and proceed if it is lowered or within written physician guidance; if confirmed at systolic 160 to 180 and/or diastolic 100 to 109 where dental symptoms and pain contribute to the hypertension, initiate emergency care with blood pressure monitoring every 10 to 15 minutes during the procedure and consider anxiety reduction techniques; if confirmed at systolic over 180 and/or diastolic over 109, seek consultation with a physician before proceeding. The table's own footnote is the referral rule: patients with systolic pressure over 180 mm Hg and/or diastolic pressure over 100 mm Hg should be referred to their physician as soon as possible or sent for urgent medical evaluation if symptomatic, and comorbidities may change these broad recommendations.

The honest caveat sits right under that table on the same ADA page, and it deserves to be read before anyone treats 160/100 as a law of nature. Reporting a JADA paper by Yarows and colleagues, the ADA writes that the authors cite lack of published study evidence or professionally accepted criteria to indicate a specific blood pressure elevation at which to defer or postpone oral health care. The nearest thing to an authority is not dental at all: the ADA notes that the 2017 ACC/AHA guideline recommends deferring surgery may be considered in persons with hypertension and planned elective major surgery who have a systolic pressure of 180 mm Hg or higher or diastolic pressure of 110 mm Hg or higher. That is a surgical threshold borrowed into dentistry, not a dental one.

Two more points from the same page are worth having at the chair. Symptoms of hypertensive crisis or emergency may include headache, vision changes, shortness of breath or chest pain, and immediate referral to emergency care may be warranted to prevent stroke or end-organ damage. And on technique, the ADA says the patient should sit quietly for 5 minutes in a chair with feet flat on the floor and the arm supported at heart level, with the cuff bladder about 80% of the bare upper arm in length and 40% in width, because a reading taken badly is the most common reason a healthy patient gets sent home.

Who it applies to#

Every adult patient, at every visit where a cuff is used, and the ADA's page says blood pressure measurement is an important screening vital sign at dental visits. It reaches the assistant taking vitals, the hygienist who sees the patient twice a year, and the dentist deciding whether today's crown prep happens. It also reaches patients who do not know they are hypertensive: the ADA cites NHANES data showing 35.3% of US adults with hypertension are unaware of it, and a dental school clinic study in which 27% of those found hypertensive had no previous diagnosis.

It does not apply to children, and it does not resolve comorbidity. The ADA's own footnote reserves that judgment. And it does not settle the epinephrine question, which the page treats separately: vasoconstrictors in local anesthetics are rarely contraindicated, but the potential for cardiovascular stimulation after inadvertent intravascular injection may lead practitioners to reduce or avoid vasoconstrictor-containing formulations in patients with cardiovascular compromise.

What changed#

The medical guideline changed and the numbers did not. The 2025 AHA/ACC document retires and replaces the 2017 one, but the AHA states the four categories and their cut points are unchanged, so any dental reference built on 130/80 and 140/90 is still current on that point. The ADA's hypertension topic page was last updated November 1, 2022 and still cites the 2017 guideline by name, which is accurate for the categories and now out of date for the guideline's title and for the terminology around severe hypertension. The dental table itself has not changed; it comes from the second edition of the ADA Practical Guide to Patients with Medical Conditions, published in 2016.

Where the source is#

The link under the title is the ADA's Oral Health Topics page, Hypertension (High Blood Pressure), prepared by ADA Research Services and Scientific Information and last updated November 1, 2022. It was fetched and read in full for this entry; Table 1 supplied the categories, Table 3 supplied the dental thresholds, and the reference list identifies Table 3's source as the Cardiovascular Diseases chapter by Hupp in the ADA Practical Guide to Patients with Medical Conditions, second edition (2016), and the deferral caveat as Yarows and colleagues in JADA. The categories were independently confirmed against the American Heart Association's own August 14, 2025 news release on the 2025 guideline, and the statement that the 2025 guideline retires and replaces the 2017 guideline comes from the guideline's own abstract as indexed in PubMed. The guideline's full text in JACC, Circulation and Hypertension did not answer requests for this entry, so no number was taken directly from it; the open-access review listed in the downloads supplied the detail on the change from hypertensive urgency to severe hypertension. The ADA topic pages are free.