Stroke Signs in an Elderly Parent: BE FAST and What to Tell 911

The stroke signs to watch for in an elderly parent are sudden: loss of balance, a change in vision, a drooping face, a weak arm, or slurred or strange speech. That's BE FAST, and the T means time to call 911. Call even if the signs fade, and don't drive them yourself. The most useful thing you can tell the dispatcher and paramedics is the clock time your parent was last seen acting normal, followed by whether they take a blood thinner.

BE FAST, letter by letter

The CDC and the American Stroke Association both teach the six-letter version. Here is the CDC's wording (CDC, Signs and Symptoms of Stroke):

The American Stroke Association's version asks about blurred vision, double vision, or loss of sight in one or both eyes, and whether one side of the face droops "or is it numb." Its last line: "If you have any of these symptoms or see someone else having them, call 911 immediately!" (American Stroke Association, Stroke Symptoms).

You'll also see the older four-letter F.A.S.T. NINDS still uses it and ends with "If you see any of these three signs, call 9-1-1 right away" (NINDS, Signs and Symptoms).

The B and E matter with older parents, because strokes in the back of the brain can look quite different from the classic droop. For these posterior strokes, the American Stroke Association lists vertigo, imbalance or one-sided weakness, slurred speech, double vision, headache, and nausea or vomiting. In an 80-year-old, "she got dizzy and threw up" is easy to blame on a stomach bug.

The other sudden signs

The CDC also lists sudden numbness or weakness in the face, arm or leg, especially on one side; sudden confusion or trouble understanding speech; and a sudden severe headache with no known cause. The National Institute on Aging adds double vision, drowsiness, and nausea or vomiting (NIA, Stroke: Signs, Causes, and Treatment). The American Stroke Association notes that women can also have disorientation, confusion or memory problems, and fatigue, and that some signs in women "can be subtle enough to be missed or brushed off."

The word doing the work is sudden. NINDS says it directly: "The key to recognizing a sign of stroke is that symptoms appear suddenly."

Why a stroke in an older parent gets missed

The parent may not know. NINDS explains that a stroke can make the person unaware of the problem, and that "bystanders may think the person just looks unaware or confused." So "Dad says he's fine" settles nothing.

Symptoms can come and go. MedlinePlus says they may occur on and off for the first day or two (MedlinePlus, Stroke).

Other things look similar. The national model guidelines written to help state and local EMS systems build their protocols tell crews to check for stroke mimics: low blood sugar, seizure, sepsis, migraine and intoxication (NASEMSO National Model EMS Clinical Guidelines, 2022). If your parent has diabetes, low blood sugar is the one to know, and the overlap is striking:

Sources: CDC, stroke signs and CDC, Low Blood Sugar.

A fall hides the cause. A parent found on the floor gets labeled "a fall," and why they fell gets lost. Sudden trouble walking or keeping balance is a stroke sign. If they also hit their head while on a blood thinner, see our guide to an elderly parent on blood thinners.

Dementia blurs the baseline. New confusion is harder to spot in a parent who is often confused, so the crew needs to hear their normal from you.

You don't have to tell a stroke from a mimic. If something sudden is on the list, call 911.

Call 911, and don't drive them yourself

The CDC is blunt: "Do not drive to the hospital or let someone else drive you. Call 9-1-1 for an ambulance so that medical personnel can begin life-saving treatment on the way to the emergency room." NINDS says the same.

There's a second reason people rarely hear: hospitals aren't equal for stroke. The NASEMSO guidelines describe destinations from "Stroke Ready" up to "Comprehensive Stroke Center" and tell crews to choose using the local stroke plan, including a hospital that can remove a clot when the signs suggest a large blocked vessel. In your own car, you'd likely head for the nearest ER.

You'll see different time windows quoted: 3 hours for the stroke to be recognized and diagnosed (CDC), four and a half hours for the best treatments (NINDS) or clot-busting medicine (MedlinePlus), and up to 24 hours for some people, even those who wake up with symptoms (NINDS). Don't do the math. Call.

If your parent is in another town

If you're on the phone with your mother and her speech goes strange, dialing 911 from your cell reaches the center where you are. The North Central Texas 9-1-1 district suggests saving the 10-digit number for your relative's local police department or sheriff's office. In its region, it says, most of those lines are answered by the same telecommunicators who take 911 calls. Or dial 911 and explain, and the call taker can look up the number for her location (NCT9-1-1). Our long-distance caregiving checklist covers the rest.

What to do while you wait

1. Write down the time your parent was last known well. That's the last time they were seen or heard acting normal, as a clock time. The NASEMSO guidelines say it "must be specific," and that if the person was fine at bedtime and woke with symptoms, bedtime is the time that counts. For a parent found on the floor, it's the last time anyone saw them normal. Note when you first noticed symptoms, too.
2. Give nothing by mouth. No food, water, pills or aspirin unless the dispatcher or a doctor tells you otherwise. Australia's Stroke Foundation says not to give someone having a stroke anything to eat or drink, or any medication, including aspirin (Stroke Foundation, What to do while you wait for an ambulance). The American Stroke Association says aspirin isn't advised during a stroke "because not all strokes are caused by blood clots," and it could make a bleeding stroke worse (American Stroke Association, Aspirin and Stroke). A stroke can also affect swallowing and dull the cough that protects the airway, so food or drink can slip into the lungs unnoticed (American Stroke Association, Trouble Swallowing After Stroke).
3. A sugar check is optional, and only after 911 is called. If your parent has diabetes, already has a meter, and someone else is free while you stay on the line, that person can check it. The American Heart Association's first aid guidelines say people trained and equipped to measure blood glucose may do so with a suspected stroke and report it, and that it "should not delay the initial call" (AHA First Aid Guidelines). Don't let it hold up the ambulance, and don't give juice, sugar or food: the same guidelines say not to give glucose by mouth to anyone who can't swallow safely. Just tell the dispatcher the number. Lows in general are in our diabetes emergency plan.
4. Stay on the line. Minneapolis 911, for one, says medical calls may be transferred to an emergency medical dispatcher who can guide you until EMTs arrive, and it asks callers not to hang up until it ends the call (Minneapolis 911).
5. Make the house easy to enter. Open the front door, turn on the porch light, shut the dog in a bedroom.
6. Gather the paper. NASEMSO asks crews to bring medicine containers to the ER when possible and to look for medical alert tags, "portable medical records" and advance directives. Bag the pill bottles with their ID, insurance cards, emergency sheet and any POLST. Our list of what to bring to the ER has the rest.

What to tell the 911 dispatcher

Location first. NCT9-1-1 says to give the location of the emergency first, then answer every question and stay on the line. Minneapolis 911 adds that it can't get details like the apartment or floor by tracking your cell phone.

What to tell the paramedics

One regional example of how fast crews work: an EMS checklist from the American Heart Association's Nebraska stroke program sets a goal of under 15 minutes on scene, with steps that include identifying the last known well time, checking blood glucose, and asking about blood thinners (AHA Nebraska, EMS Pre-Hospital Checklist). It's a local tool, not a national rule.

Here is the NASEMSO stroke history list, in family terms:

For stroke, the guidelines also tell crews to consider bringing the witness along or getting their phone number for the ER team. If you saw it start, ride along or make sure the ER has your number.

Our medication list guide shows how to keep the drug list current, and the emergency information sheet for paramedics puts all of this on one page.

Warning strokes: when the signs go away

A TIA, or transient ischemic attack, causes stroke symptoms that clear up. The American Stroke Association, which calls it a "warning stroke," says symptoms usually last less than five minutes but can last up to 24 hours (American Stroke Association, TIA). MedlinePlus says most last 1 to 2 hours, with the same 24-hour limit. The sources differ on how long, and none says to wait it out. Families wait here, because by the time anyone thinks to call, Mom is pouring coffee again.

• The CDC says there is no way to know at the beginning whether symptoms are from a TIA or a major stroke, and calls a TIA a medical emergency (CDC, About Stroke). Its page, updated in 2024, says as many as 10% to 15% of people will have a major stroke within 3 months of a TIA.
• MedlinePlus says some people have a stroke within 3 months of a TIA, and half of those strokes happen within 48 hours (MedlinePlus, Transient ischemic attack).
• The American Stroke Association says evaluation should ideally happen within 24 hours of when symptoms began. A regular appointment next week doesn't meet that.

So call 911 even if the symptoms are gone. MedlinePlus says the same: "Do not ignore symptoms just because they go away." If you only hear about it later ("my hand went funny Tuesday, it was nothing"), the CDC says to tell a health care team right away. Call their doctor's office or nurse line that same day, describe what happened and when, and ask where they want your parent seen today. If anything comes back, call 911.

What to keep ready in the binder

Almost everything the crew asks can be written down months ahead.

• One-page emergency sheet: name, date of birth, conditions (including any past stroke or TIA), allergies
• Blood thinner name, dose, schedule, and how to tell when the last dose was taken
• Diabetes status, and where the meter or sensor reader lives
• Dated medication list, including over-the-counter medicines
• A "normal for Mom" line: thinking, speech, walking, hearing, vision
• Recent surgeries, falls, head bumps and warning strokes, with dates
• Whether a POLST or DNR exists and where the original is (our POLST guide)
• Health care agent's name and phone
• Doctors, pharmacy, and copies of insurance cards
• For a parent in another town: their local 10-digit emergency number and a neighbor with a key
• A line that reads "Last known well: ____" with a pen clipped to the sheet

Frequently asked questions

What are the first signs of a stroke in an elderly person?

The BE FAST signs, coming on suddenly. Older adults may also show sudden confusion, drowsiness or nausea, which are easy to blame on tiredness.

Should I give my parent aspirin if I think they're having a stroke?

No, unless the dispatcher or a doctor tells you to. The American Stroke Association says aspirin isn't advised during a stroke because some strokes are bleeds, and aspirin could make those worse. Only a brain scan can tell which it is.

Should I call 911 if the symptoms went away?

Yes. The CDC says nobody can tell at first whether it's a TIA or a major stroke, and treats both as emergencies.

Could it just be low blood sugar?

It could, and EMS guidelines list it as a stroke mimic. Call 911 anyway. If you already have a meter and someone else is free, they can check it so you can pass the number to the dispatcher, but don't give food or sugar by mouth. Let the crew sort it out.

Getting this on paper before you need it

You can build all of this yourself from the table and checklist above, with an afternoon and your parent's pill bottles. If you'd rather not start from a blank page, Emergency Binder Now walks you through about 25 minutes of guided questions and turns the answers into a printable binder, with blood thinners, conditions, allergies, code status and contacts on a one-page Emergency Information Sheet for paramedics and the ER. You can see a sample binder first.

This article is general information, not medical advice. If you think your parent is having a stroke, call 911. Questions about their stroke risk or medicines belong with their doctor or pharmacist.