I’ve been in pharma for over 13 years. Studied the human heart. How it works. What breaks it.
A few years ago, a friend asked me something I hadn’t really thought about: “Can dogs have heart attacks too?”
I looked into it. Turns out, yes — dogs can have heart attacks. But it’s different from humans.
Here’s what I found.
Do Dogs Actually Have Heart Attacks?
Yes — but not the same way humans do.
In humans, a heart attack usually happens when a blood clot blocks blood flow. That’s called a myocardial infarction.
In dogs, that’s rare. What’s more common is sudden heart failure caused by something else.
So yes, dogs can have heart attacks — but the causes are usually different.
What Causes Heart Attacks in Dogs?
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Heart disease — most common in older dogs
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Heart tumors — rare but serious
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Irregular heartbeats — can be fatal
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Chest injury — trauma to the heart
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Heartworm disease — parasites that damage the heart
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Other conditions — like Cushing’s disease or thyroid issues
The most common cause is dilated cardiomyopathy (DCM) — the heart gets enlarged and weak. Some breeds are more prone to it, like Dobermans, Boxers, and Great Danes.
Breeds at Higher Risk
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Doberman Pinscher
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Boxer
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Great Dane
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Cavalier King Charles Spaniel
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German Shepherd
Not saying every dog from these breeds will have issues — but they’re more likely to. Worth keeping an eye on.
Signs and Symptoms
Watch for these:
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Collapsing or fainting
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Heavy panting, difficulty breathing
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Weakness — can’t stand or walk
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Blue or pale gums
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Restlessness — pacing, can’t settle
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Coughing, especially at night
If you see any of these, get to a vet immediately. Don’t wait.
What to Do If It Happens
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Stay calm — panic won’t help
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Call your vet right away
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Keep your dog still and calm
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Check for breathing and pulse — if absent, CPR might be needed
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Transport carefully — support their body
Do not give any medication without a vet’s guidance.
How to Prevent Heart Problems
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Regular vet checkups — catch issues early
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Healthy diet — prevents obesity, reduces strain on the heart
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Regular exercise — keeps the heart strong, but don’t overdo it
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Heartworm prevention — monthly medication
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Monitor older dogs closely — issues become more common with age
What I Tell People
I’m not a vet. I’m a chemist who’s spent years studying how the body works.
But the basics are the same: the heart is a muscle. It needs good food, exercise, and care.
If you have a dog, especially an older one or a breed prone to heart issues — get regular checkups. Watch for signs. Don’t ignore coughing or restlessness.
And if something feels off, don’t wait. Get to a vet.
Written by Altaf Khan | MSc Chemistry, MBA, QC Manager | Medical Bluff
Reviewed by: Dr. Ayesha, Medical Reviewer
