Preventing Stroke: Blood Pressure, an Irregular Pulse, and 30 Seconds a Week

If this is happening right now

If the person in front of you has a face drooping on one side, sudden weakness or numbness in an arm, slurred or confused speech, a sudden loss of balance, or sudden trouble with vision — stop reading this page and call 108. That is BE-FAST: Balance, Eyes, Face, Arm, Speech, Time to call. Note the exact clock time the symptoms began, or when the person was last seen normal, and give nothing by mouth — no food, no water, no medicine, not even a sip. Clot-dissolving stroke treatment usually works only within about 4.5 hours, so an ambulance beats a car: call 108 and the ambulance network knows the nearest equipped centre, while PPK Hospital’s 24/7 emergency and intensive care can stabilise a patient in the meantime. Nothing on the rest of this page is worth thirty seconds of that window.

Stroke emergency — what to do right now →

The number that decides most strokes

Blood pressure is the largest single stroke risk factor in India, and the cruelty of it is that it announces nothing. There is no headache that reliably warns you, no giddiness that appears on schedule, no tiredness you could tell apart from a long day cutting rubber before dawn or standing in a paddy field in the sun. People tell me, with complete sincerity, that they would feel it if their pressure were high. Nobody feels 170 over 100. The first symptom of untreated hypertension, for a great many people in this district, is the stroke itself — the arteries carrying blood to the brain having been battered quietly for fifteen years. This is why blood pressure is not something to be judged; it is something to be measured, on a schedule, whether or not you feel well. Every adult over thirty should know their own numbers the way they know their own age, and anyone with diabetes, a family history of stroke, or a previous high reading should know them better than that.

Measuring your pressure at home

A home machine is one of the few pieces of medical equipment worth owning. Buy an upper-arm cuff, not a wrist model, and take it once to a consultation so its reading can be compared against the clinic’s. Then use it properly, because a badly taken reading is worse than none: sit for five minutes first, back supported, feet flat on the floor, arm resting on a table at roughly heart level, no talking. Nothing to eat, no coffee, no tobacco for half an hour before. Take two readings a minute apart and write both in a notebook with the date — a phone note is fine, a memory is not. A reading taken after sprinting for the Nagercoil bus, or after an argument, or in the first hour of a fever, is not your blood pressure. What your doctor wants is a week of morning and evening readings before your review, which is worth far more than a single number captured in a busy clinic with a full bladder and a wet umbrella. Do not chase individual readings up and down; patterns decide treatment.

Thirty seconds at your own wrist

Here is the check almost nobody has been taught. Sit down and rest for a minute. Turn your left hand palm upward. Place the index and middle fingers of your right hand on the wrist just below the base of the thumb, in the soft groove between the tendon and the bone, and press lightly until you feel the beat. Never use your thumb — it carries a pulse of its own and will fool you. Now count the beats for thirty seconds and double it for your heart rate. But the rate is the smaller half of what you are looking for. Close your eyes and listen to the rhythm. A normal pulse is a metronome: beat, beat, beat, evenly spaced, perhaps quickening slightly as you breathe in. An abnormal one has no pattern at all — two beats close together, a gap, a run of three, another gap, a beat that seems to be missed entirely. Doctors call that irregularly irregular, and it is exactly as disorderly as it sounds. Do this once a week, on any ordinary evening. It costs nothing, needs no device, and it is the only screening test in this article you can perform in the time it takes the kettle to boil.

What an irregular pulse can mean

An irregular rhythm is not a diagnosis and not an emergency by itself — it is a reason to see a doctor for an ECG, which takes a few minutes and settles the question. What the ECG is looking for is atrial fibrillation, in which the upper chambers of the heart quiver instead of contracting cleanly. Blood that should be pushed onward pools instead, a clot can form, and if that clot travels it commonly travels to the brain — which is why strokes caused by atrial fibrillation tend to be larger and more disabling than others. Untreated, it raises the risk of stroke roughly five-fold. The reason this page teaches a wrist check at all is that community screening studies in rural India keep finding the same thing: most of the atrial fibrillation in the population had never been recognised, in people who felt entirely well and had no complaint to bring to a doctor. Where it is found, blood-thinning medicines (anticoagulants) may be prescribed after assessment — a decision that weighs stroke risk against bleeding risk, is reviewed over time, and belongs to a doctor with an ECG in hand. It is never a decision to take from a relative’s prescription or a forwarded message.

Why not to start aspirin on your own

Aspirin has a genuine place in medicine — usually after a stroke or a heart attack has already happened, prescribed to a specific person and reviewed. What changed is the advice about starting it yourself as a precaution. Major guidance was revised in 2019 and again in 2022: routine daily aspirin is no longer recommended for most adults who have never had a cardiovascular event, because the bleeding it causes — bleeding in the stomach, and bleeding into the brain — offsets the clots it prevents. That second risk is the one people underestimate. Not every stroke is a clot; a substantial minority are bleeds, and in a bleed aspirin makes matters worse. So do not begin a daily tablet because a neighbour of the same age takes one, and do not treat it as harmless because it is cheap and sold without a prescription. Equally, if a doctor has already put you on aspirin for a good reason, do not stop it on your own — bring the question to your next review instead.

Sugar, and why an intensivist writes about stroke

Sugar — the word everyone here uses for diabetes and for the blood glucose reading alike — belongs in a stroke article because the two conditions are the same problem seen from two ends. Long-standing high glucose stiffens and narrows the large arteries feeding the brain and damages the small vessels inside it, and people with diabetes carry substantially higher stroke risk than people without. It also travels in company: high blood pressure, unfavourable cholesterol and diabetes cluster in the same person, and each multiplies the others. This is the practical argument for treating them as one job rather than three. Bringing an HbA1c down while ignoring a blood pressure of 160 is half a treatment. Tobacco in any form — smoked, or chewed with betel — undoes a good part of whatever else is achieved. The patients who reach an intensive care unit after a stroke have very often been carrying two or three of these for years, each individually described as “slightly high” and none of them treated.

Diabetes care with Dr. Ruskin →

Stroke before fifty is not rare here

There is a widespread belief that stroke belongs to old age, and it costs younger patients dearly. Indian studies show that somewhere between 18 and 32 percent of strokes occur in people under the age of fifty — a far larger share than Western data reports, and one of the reasons a stroke in a thirty-eight-year-old is so often mistaken at home for exhaustion, a migraine, or the effect of the heat. The threads running through those cases are ordinary rather than exotic: blood pressure that nobody has measured since a wedding medical check, diabetes arriving a decade earlier in Indian patients than in European ones, tobacco, and long untreated stretches because the person felt fit enough to work. Being young is a reason to check these things, not a reason to skip them. If you are in your thirties and have never had your blood pressure recorded properly, that is the single most useful appointment available to you this month.

What a prevention visit actually involves

Very little that is dramatic. Blood pressure measured correctly, in both arms at a first visit, and compared with whatever your home machine has been recording. The pulse felt for rhythm, and an ECG taken if there is any doubt at all about it. A fasting sugar or an HbA1c, and a lipid profile. Weight and waist, which in Indian bodies say more together than either says alone. A conversation about tobacco, about how much you actually move in a day, and about what runs in your family — a father’s stroke at sixty is clinical information, not family history trivia. Where treatment is needed it is started, explained and reviewed rather than handed over at a counter, and where it is not needed you leave with your numbers and a date to check them again. Half an hour, once a year, against an event that takes an afternoon and does not give the time back.

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Related

• Stroke emergency — call 108 now →
• A “mini stroke” is a full warning →
• “My cholesterol is normal” — why that report doesn’t clear an Indian heart →
• Diabetes care with Dr. Ruskin →