Someone with Alzheimer's has a stroke. Now what?
I ask myself some version of that question all the time. As a physical therapist working in a rehab center, I see people after strokes every week, and many of them are also living with dementia, often Alzheimer's. When that happens, the person may now be living with mixed dementia after stroke, and the picture gets more complicated for everyone. The first thing I need to understand isn't the diagnosis. It's how they were managing before the stroke.
Because "they have dementia" doesn't tell me much. It doesn't tell me whether they were walking around the house on their own. It doesn't tell me whether they could find the bathroom, or whether someone was beside them through every part of the day. Those details matter more than almost anything else when we start planning recovery.
Maybe you're living this right now. You'd already figured out life with Alzheimer's. You had a routine, even if some days it barely held together. Then a stroke. A hospital stay. New people explaining new changes. And somewhere in all of that, someone starts talking about going home, and you're thinking, "Wait a minute. Can I actually manage this?"
This post is for that moment.
What is mixed dementia?
Mixed dementia means that brain changes from more than one cause of dementia are present at the same time. The most common combination is Alzheimer's disease along with vascular changes, which is damage related to blood vessel disease or stroke. Other combinations happen too, such as Alzheimer's changes alongside Lewy body disease. Sometimes more than two causes are involved at once.
Mixed dementia doesn't always begin with a big event like a stroke. Sometimes the changes build quietly over years. Research on brain tissue has shown that many older adults with dementia have more than one type of brain change, and that having several at once can lower the threshold at which symptoms show up. Stroke itself also raises the risk of dementia, especially after a more severe stroke or more than one stroke.
Here's what makes it so confusing in real life. These changes don't arrive as neatly separated problems. Nobody hands you a note that says, "This difficulty is from Alzheimer's, and this one is from the stroke." You're seeing the whole person, trying to get through lunch, get to the bathroom, or settle in for the night.
Why doesn't this look like what I've read about Alzheimer's?
You've done your homework. You've read about Alzheimer's, maybe watched videos or listened to podcasts. And now the day in front of you doesn't match any of it. That can feel incredibly frustrating.
There's a reason for that. When more than one condition is involved, the symptoms can overlap, mix, and change in ways a single description won't capture. Sometimes other things are contributing too, like medications, infection, pain, or poor sleep, and those need to be checked. And sometimes the healthcare team is still figuring out the full picture.
You're allowed to ask the team to explain what they know and what they're still unsure about. You shouldn't have to guess what a diagnosis means for the person you care for.
When lunch is ready, but nothing happens
Let me give you a moment I see often.
The person you care for has just come home after a stroke. You make lunch. You put the plate down and finally sit for a minute yourself. Then you notice they haven't touched it.
"Your lunch is ready." Nothing. You move a little closer and say it a little louder. "Go ahead, it's getting cold." Still nothing. They just sit there looking at the plate. And you hear your own voice getting sharper, because you've been up and down six times, your own lunch is sitting somewhere, and you need to make a phone call before the office closes.
Then the guilt shows up for being irritated.
That's a really hard place to be. You can understand that someone is struggling and still feel completely worn down by how much help the day requires. Both things can be true at once. Please don't beat yourself up for it.
When you have a moment to look a little closer, though, there may be something useful to notice. Before the stroke, maybe a simple reminder was enough.
Today, maybe:
- Holding the fork is harder
- They're having trouble noticing part of the plate
- Getting started is the hard part
- They're exhausted before the meal even begins
From your side of the table, it all looks the same. They're not eating. But the help they need may have changed.
Looking at the meal through the Wheel of Function Framework™
This is where I use the Wheel of Function Framework™, the approach I created to look at the whole person instead of just the behavior. The person living with dementia sits at the center, and five spokes support their ability to function: Emotional, Sensory, Physical, Cognitive, and Environment.
At lunch, more than one spoke could be involved. A weaker hand is Physical. Missing food on one side of the plate may be Sensory. Trouble starting is Cognitive. Fatigue and frustration touch the Emotional spoke. A noisy room or a busy plate is the Environment.
You don't need to run through a full assessment while the food gets cold. Just start with one thing you can see, and bring new difficulties to the team. If swallowing seems different, or they're coughing during meals, ask for a swallowing assessment and a clear plan. That's common after a stroke and important to check.
And if you try the team's suggestions and the meal is still hard, tell them. "We tried it this way, and here's what happened." A strategy that doesn't work isn't proof you did something wrong. It's more information for the team.
What does "baseline" mean, and why does it matter after a stroke?
Baseline is a word we use constantly in healthcare. When I say baseline, I mean what a usual day looked like before this stroke, while the person was already living with dementia.
- How were they getting around?
- How much help did they need, and with what?
- What could they do if someone gave them a little extra time or a familiar cue?
Here's why it matters so much in rehab. Say I'm working with someone who doesn't remember what we practiced yesterday. I need to know whether learning new information was already hard before the stroke. If it was, expecting them to remember a whole new set of exercises on their own is asking for something they couldn't do even before this happened.
At the same time, maybe they needed reminders before, but they could stand up and walk to the kitchen without anyone helping. Now they need someone's hands to help them stand. That's a significant change, and "they have dementia" doesn't explain it away.
Both parts belong in the picture: the help they already needed, and what's different now. That's why the people who know them best are so important to the conversation.
What "independent" really looked like at home
You might tell me, "At home, I'd say, 'Let's go get some coffee,' and he'd get up and follow me. But if I gave him three directions at once, he'd get confused."
That tells me far more than "he needed supervision." It shows me what participation actually looked like for him and what kind of support helped.
If you're a professional reading this, ask for those details. The word "independent" can hide a lot of help that someone quietly built into the day. A person may have been walking without hands-on help, but their care partner set everything up, stayed nearby, and reminded them where they were going. That isn't really independent, and the plan needs to know the difference.
And if you're the care partner who keeps saying, "But this is different," keep saying it. It can be incredibly frustrating to feel like everything is being filed under the dementia diagnosis. You knew there were difficulties before, and you're trying to explain that there are new ones now. Be persistent. We as professionals need to listen.
Knowing the baseline doesn't tell us exactly how much someone will recover. Nobody has a crystal ball for that. But it gives us a much more useful place to start.
Making the plan for home fit your real life
A plan can sound perfectly reasonable in a therapy gym or a team meeting and still be really hard to carry out in your kitchen.
You can sit through the explanation, nod along, and get home thinking, "I have no idea how I'm supposed to do all of this." Especially when the person you care for can't remember the instructions, so you're remembering for both of you. If someone needed reminders before the stroke, a sheet of exercises with several steps may not work for practice at home.
You can ask the team for what you need. Here are a few things you can say, word for word:
- "Can you show me that again, and then watch me try it?"
- "He won't remember this on his own. What are we going to do about that?"
- "I'm overwhelmed. I need us to slow down."
You don't have to sound calm, and you don't need the right medical words. You just need to say, "I need some help here."
The team also needs to know:
- If helping them stand puts your own safety at risk
- If you work during the day
- If you're the only person providing care, with no one else coming to help
Sometimes advice quietly assumes there's another person around, extra money for paid help, or a home that's already set up for safety. Those things can't be assumed. As professionals, we need to ask better questions and stay curious. The plan has to make sense in the home you have, with the support you actually have.
How much better will they get?
This might be the hardest question of all, and I wish I had a simple answer. Often, we just don't know.
After a stroke, some abilities may improve with recovery and rehab, and some difficulties may remain. Dementia can affect how someone learns, follows directions, and takes part in therapy, so the approach may need to change. But the diagnosis alone doesn't tell us everything that's possible. Knowing what they could do before the stroke helps us set realistic goals that fit the person, and we keep reassessing as recovery unfolds.
A realistic goal might be walking to the bathroom with help. It might be taking part in part of a meal. It might be finding a safer way for you to help them move. Those are conversations to have with the rehab team.
And even when there's progress, you may still find yourself thinking about what they could do before. That's being human. You can appreciate the improvement and still wish things were easier. You don't have to turn every small gain into a reason you shouldn't feel tired or disappointed.
There's also no single timeline for mixed dementia. There may be gradual changes, a sudden change after a stroke, and some improvement during recovery, all in the same person. That uncertainty is exhausting, and it's hard to plan when you don't know what next week will look like.
When a sudden change is an emergency
One thing needs to be very clear. A sudden change should never be brushed aside because someone has dementia.
Sudden confusion needs immediate medical attention. If you notice sudden facial drooping, weakness on one side, trouble speaking, or a sudden change in balance or vision, call 911 right away, even if it improves or seems to go away.
Other causes, like delirium, a medication effect, or another medical problem, can also cause sudden changes. Those need to be evaluated by the healthcare team, not assumed to be dementia getting worse.
What does treatment look like when more than one condition is involved?
It depends on the conditions and the person's overall health. Care may include medication for Alzheimer's symptoms, managing blood pressure or diabetes, therapy, or help with sleep and mood.
You might hear all of that and think, "That's even more appointments and more things for me to manage." That's a fair concern, and it belongs in the conversation.
You can ask:
- "What are we trying to help with first?"
- "How will we know if this is working?"
- "These instructions conflict. Can you help me sort out what matters most?"
- "What do I do when everything can't happen exactly as planned?"
If you're still waiting on a clear diagnosis, it's also fair to ask, "Could more than one condition be contributing? Would knowing that change what we do?"
Bring a few examples from home. What could the person do before? What happens now? When did you first notice the difference? A few notes on your phone are enough to start.
Reading the Baseline Before You Read the Behavior
Here's the heart of it. With mixed dementia after a stroke, the most useful question isn't just "What's wrong now?" It's "What did a usual day look like before, and what's different today?" That baseline is what turns a confusing moment into a plan the team can actually help with.
Understanding more doesn't make the work easy. You still have meals to make, appointments to keep, and your own life asking things of you. So if you're frustrated, bring that into the conversation about care too. "By the end of the day, I have nothing left." "We need more help than we have right now." You deserve to be taken seriously when you say that.
For now, maybe there's one question from this post you want to bring to the team. Or maybe you need to tell them the current plan is asking more than you can safely give. Either one is worth saying out loud.
I talk through all of this in the newest episode of Navigating Dementia, Mixed Dementia After a Stroke: What Care Partners Need to Know.
Get ready for your next appointment
Not sure how to explain what's changed? My free Doctor Visit Prep Guide helps you organize what you've noticed, what's different now, and the questions you want answered before your next appointment. You don't need a diagnosis to use it.
- Notes
- Alzheimer's Association. (n.d.). Mixed dementia. https://www.alz.org/alzheimers-dementia/what-is-dementia/types-of-dementia/mixed-dementia
- American Stroke Association. (n.d.). Let's talk about B.E. F.A.S.T. https://www.stroke.org/en/help-and-support/resource-library/lets-talk-about-stroke/be-fast
- Custodio, N., Montesinos, R., Lira, D., Herrera-Pérez, E., Bardales, Y., & Valeriano-Lorenzo, L. (2017). Mixed dementia: A review of the evidence. Dementia & Neuropsychologia, 11(4), 364–370. https://doi.org/10.1590/1980-57642016dn11-040005
- Kapasi, A., DeCarli, C., & Schneider, J. A. (2017). Impact of multiple pathologies on the threshold for clinically overt dementia. Acta Neuropathologica, 134(2), 171–186. https://doi.org/10.1007/s00401-017-1717-7
- National Institute on Aging. (n.d.). Vascular dementia: Causes, symptoms, and treatments. https://www.nia.nih.gov/health/vascular-dementia/vascular-dementia-causes-symptoms-and-treatments
- Pendlebury, S. T., & Rothwell, P. M. (2019). Incidence and prevalence of dementia associated with transient ischaemic attack and stroke: Analysis of the population-based Oxford Vascular Study. The Lancet Neurology, 18(3), 248–258. https://doi.org/10.1016/S1474-4422(18)30442-3
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ABOUT THE AUTHOR
Carlyn Lenfestey, PT, MPT, CDP, CADDCT, is a licensed physical therapist with 25 years of clinical experience and 15 years specializing in dementia care. She is the founder of A Better Way: Dementia Care Solutions, LLC, the creator of the Wheel of Function Framework™, and the host of the podcast, Navigating Dementia.
DISCLAIMER
The information provided in this blog is for educational purposes only and should not be considered medical advice. Always consult with a doctor or a licensed physical therapist before starting any new exercise routine, using assistive devices, or following the recommendations mentioned. Every individual's needs are different, and professional guidance is essential to ensure safety and appropriateness of care.
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