The highest recorded blood pressure, cholesterol and blood sugar readings.

During an office vist when your primary care pghysician mentions your blood pressure, cholesterol or blood sugar numbers have you ever wondered who may have had the highest readings? The following information is accurate as of May 11, 2026.

Blood pressure

There is no official Guinness-style “highest blood pressure ever survived without a heart attack or stroke” record in medicine, because many extreme readings happen briefly, are difficult to verify, or occur during emergencies where organ damage is uncertain.

But there are several remarkable documented situations.

One of the highest scientifically measured blood pressures ever recorded in a person who survived occurred during extreme weightlifting. Researchers measured pressures around 370/360 mmHg during maximum-effort leg presses combined with breath-holding (the Valsalva maneuver). The spikes lasted only seconds, and the athletes did not suffer heart attacks or strokes because the pressure was extremely temporary and they were otherwise healthy.

For comparison, doctors consider this a hypertensive crisis:

Systolic (top number) over 180. Diastolic (bottom number) over 120

180/120 mmHg180/120\ \text{mmHg}180/120 mmHg

At those levels, emergency treatment is recommended because the risk of stroke, heart attack, kidney failure, or aortic rupture rises sharply.

What makes the “370/360” case extraordinary is: it happened in a controlled athletic setting,the pressure spike was momentary, the subjects had strong cardiovascular systems, and the vessels were not chronically diseased.

Doctors say chronic high pressure is often more dangerous than a brief spike because arteries and organs are exposed continuously.

There are also reports from emergency medicine workers of patients surviving pressures above 300 systolic without immediate stroke or heart attack, though many had serious symptoms or underlying disease. Some involved kidney failure, adrenal tumors, or dialysis complications.

On Reddit a doctor said: 400/220 is the highest I’ve seen in my career. Dialysis patients who miss a week are frightening. Then we get a reading of 390/(the bottom was well over 200).

These Reddit accounts are not scientific records, but they match what emergency clinicians sometimes describe: humans can occasionally survive astonishing blood pressures, especially for short periods, without immediate stroke or heart attack.

An important medical point is that blood pressure variability and long-term uncontrolled hypertension are strongly linked to stroke and heart attack risk — even if someone feels fine.

Cholesterol

The Mayo Clinic notes that in the most serious forms of FH, LDL cholesterol can rise above 500 mg/dL.

Some published medical case reports have described total cholesterol levels over 1,000 mg/dL, especially in children born with HoFH. In these cases, cholesterol can visibly deposit in the skin, tendons, and even around the eyes.

People sometimes develop heart disease in childhood or their teenage years. The condition happens because the body cannot properly remove LDL cholesterol from the bloodstream due to defective LDL receptor genes.

Blood Sugar

The highest recorded blood sugar level in a surviving human is \(2,656\text{ mg/dL}\) (\(147.6\text{ mmol/L}\)), documented in March 2008 in a 6-year-old boy named Michael Patrick Buonocore at a Pennsylvania emergency room.

This extreme reading resulted from undiagnosed type 1 diabetes.Key Context: Typical blood sugar levels are roughly \(80–120\text{ mg/dL}\). A reading of \(500\text{ mg/dL}\) is often enough to cause a coma.Other High Records:

A previous record in the Guinness Book of Records was \(2,460\text{ mg/dL}\) in 1993, set by Ohio resident Michael Stuber.Lowest Recorded Blood SugarVerified reports of survivors in the medical literature list blood glucose readings as low as \(1–5\text{ mg/dL}\) in comatose patients. These severe, life-threatening hypoglycemic events are typically reversed in emergency settings.

What you have read is for information purposes only.Please follow the instructions of your hearlthcare provider and do not take your results lightly.