108: What Actually Happens During a Heart Attack

Your heart doesn’t “randomly” decide to have a heart attack, and that one idea can change how you react to symptoms. We sit down and explain, in plain language, what’s happening inside the body when a coronary artery suddenly gets blocked and why the phrase time is muscle is not just a slogan, it’s the whole game.

We start with the basics: the heart is a muscle that needs its own oxygen supply, delivered through the coronary arteries. Then we connect the dots on how atherosclerosis develops over years, driven by risks like high blood pressure, diabetes, smoking, and cholesterol that’s especially atherogenic such as LDL, apolipoprotein B (ApoB), and lipoprotein(a). The real turning point is plaque rupture. When an inflamed plaque breaks open, the body treats it like an injury and forms a clot that can partially or completely block blood flow, setting off a myocardial infarction and, if not reversed, heart muscle death.

Next we translate that physiology into the symptoms people actually feel: chest pressure or heaviness, shortness of breath, sweating, nausea, and the confusing pain that can show up in the left arm, jaw, neck, or shoulder because of shared nerve pathways. We also talk about the hard truth and the hopeful part: not everything that looks like a heart attack is one, but it takes testing to know, and acting quickly can save heart tissue and improve outcomes.

If this helped you, share it with someone you care about, subscribe for more practical patient education, and leave a review so more people can find the show. And please leave us a voicemail so we can feature your question in a future mailbag episode.

Transcript

Travel Update And TV Comfort

SPEAKER_02 0:02

Hi, welcome to your checkup. We are the Patient Education Podcast where we bring conversations from the doctor's office to your ears. On this podcast, we try to bring medicine closer to its patients. I'm Matt Delesky, a family medicine doctor in the Philadelphia area. And I'm Cola Ruffel. I'm a nurse. And we are so excited you were able to join us here again today. So, of course, we would love to bring you a fresh banter section, but we are away this week. We are traveling, and we will not be near a computer to upload this episode when this comes out. So this is getting uploaded early. All that to say, here we are on a Monday night watching Love on the Spectrum, and literally the most endearing show you could possibly have.

SPEAKER_00 0:53

I love it so much.

SPEAKER_02 0:55

Yeah, I I think it is I think my new favorite character is Logan.

SPEAKER_00 1:03

Oh, I love him.

SPEAKER_02 1:05

Sweet Logan.

SPEAKER_00 1:06

Sweet, sweet Logan.

SPEAKER_02 1:09

Share a kindred spirit loving Hannah Montana. You do. Every time they open their mouths, my bottom lip just comes out. Like I just can't help it. You know, in that like pouting, like that's so cute type bottom lip. So if you haven't watched Love on the Spectrum, perhaps you'd think about that. Um and then we had a Mediterranean bowl tonight.

SPEAKER_00 1:33

Because another one of our favorite. Because well, because we need to eat what's in our fridge.

Voicemail Request And Mailbag Plan

SPEAKER_02 1:41

Yeah, because we're going away. Because we're going away. Um you must be wondering. Oh, but if you're listening to this, please leave us a voicemail. Um, if you go into the show notes on wherever you listen to podcasts, you will find that you can send us fan mail, but send us a voicemail as well. And we would encourage any of that because we want to accumulate some that we will use for like a mailbag episode or at least as some component of our episodes. So if you do feel so inclined, please leave us a voicemail. That would be so cool. Uh, the podcast hosting service that we use recently dropped that feature. Um, who do you think our first voicemail will be from?

SPEAKER_01 2:23

Probably our loyal listener.

SPEAKER_02 2:25

Yeah, I think he a special one. It's been a long time since he's commented.

SPEAKER_00 2:30

It has been. Um, but do you think he still listens as loyally? No.

SPEAKER_02 2:33

I definitely don't think.

SPEAKER_00 2:34

No, our brother Vanessa does.

SPEAKER_02 2:36

We gathered Vanessa, though, as a loyal listener.

SPEAKER_00 2:38

Yeah.

Why We Are Talking Heart Attacks

Defining A Heart Attack Clearly

SPEAKER_02 2:39

Um, so that's great. Uh, maybe I don't know. We'll be surprised who will be the first voicemail to be featured on the pod. Your voice will come on the pod. Hopefully it's you, Temecula slash Helsinki. We're looking at you. Um, but we hope that you enjoy this little bit of a different style of episode coming up next, where we talk about heart attacks. So without further ado, here we go. Enjoy. So, what are we going to talk about today, Nick?

SPEAKER_01 3:12

Today we are breaking down what a heart attack is.

How The Heart Gets Oxygen

SPEAKER_02 3:16

Dun, dun, dun. So we'd like to walk you through something that we talk about all the time, but rarely explain in a way that we think makes sense. What is really happening inside of your body when someone is having a heart attack? Because we think that once you understand it, the symptoms make more sense, the urgency makes more sense, and honestly, it becomes a lot less mysterious and more real so we can take action on it and prevent them. So let's start with the heart. Nikki, can you take us through the first part?

SPEAKER_01 3:54

All right, we're gonna go. Well, we're gonna go before we talk about a heart attack. We're gonna briefly talk about the heart so we have a basic general understanding, and so everyone's on the same page. So it's important to know that your heart is a muscle, and like any other muscle in your body, it needs oxygen and nutrients to survive and pump blood out everywhere to where it needs to go. And oxygen is delivered through blood vessels called coronary arteries, and they sit on the surface of the heart. So they're what is supplying your blood, supplying your heart with blood. I almost said that backwards. So at baseline, blood flows through these arteries, your heart muscle gets oxygen to keep working, and everything's running smoothly.

Risk Factors That Build Plaque

SPEAKER_02 4:44

It is very cool. Does that make sense? It makes perfect sense. Yeah, well said, it is really cool that the heart supplies its own blood in diastole, which is super cool. So then this is part this is where things start often years before a heart attack ever happens over time, things like high blood pressure, high cholesterol, high atherogenic cholesterol, like LDL cholesterol, apolipoprotein B, or lipoprotein lipoprotein little A, smoking, and diabetes can lead to plaque buildup inside those arteries. And you can think of plaque like a fatty inflamed deposit sitting in the wall of the artery. At first, it might not cause any symptoms at all, and the body adapts, so blood still gets through, but underneath the surface, that plaque may be unstable.

SPEAKER_01 5:44

So the key moment is when that plaque becomes unstable, and at some point, most often suddenly, the plaque can rupture. And so when this happens, your body's actually reacting in the way that it was designed to. So if this plaque ruptures, your body thinks it's an there is an injury, and then it starts to form a blood clot. And that clot can partially block the artery or it can completely block it. So it's blocking the arteries that are supplying blood to your heart.

SPEAKER_02 6:19

There we go.

SPEAKER_01 6:19

So that's what's happening.

SPEAKER_02 6:21

And once that artery is blocked, the heart muscle downstream is no longer getting oxygen, and this is where a heart attack truly begins. So within seconds, oxygen levels drop. Within minutes, the heart muscle becomes stressed and injured. And if the blockage isn't opened, the cells, the actual cells, begin to die. And so this is what we call a myocardial infarction, which was a hard one to wrap my head around. I wanted it to be infarction so much in school. I don't know why, it just made more sense to me, but infarction and it means literally death of heart muscle.

SPEAKER_01 7:04

Okay, so let's I guess we'll connect what people are feeling when they have this death of their heart muscle.

SPEAKER_02 7:10

So dramatic.

SPEAKER_01 7:13

Um, the main one is chest pressure, where a lot of people will describe it as um like a squeezing, a heaviness. They say they feel like there's an elephant sitting on their chest, and that is your heart muscle not to be dramatic, but crying out from a lack of oxygen.

SPEAKER_02 7:35

That actually sounds bad. Um what else? What else can happen?

SPEAKER_01 7:40

Um, so then you can also have pain in your arm or your jaw, which this can be confusing to a lot of people. Um, and the reason this happens is because there are nerves from the heart that share the same pathways with other parts of the body, so that pain can kind of radiate to where those nerves go.

SPEAKER_02 7:59

Terrifying.

SPEAKER_01 8:00

So, like your left arm, jaw, neck great, everywhere. Yeah, phenomenal. Um, you can also have some sweating and nausea, and this is from an activation of your autonomic nervous system where your body is recognizing that something is very wrong, and yeah, you start sweating.

SPEAKER_02 8:22

Not good. Not good. Not good.

SPEAKER_01 8:25

Um, and then of course there's shortness of breath because your heart is not pumping well, fluid can get backed up, your oxygen delivery drops, so you have all this pain, maybe you're sweaty, you feel short of breath. Yikes.

SPEAKER_02 8:40

Not good.

SPEAKER_01 8:41

Big yikes.

Time Is Muscle And Why

SPEAKER_02 8:42

Big yikes. And so time is muscle. And perhaps the most important takeaway is what we mean by that is the artery, the longer that that artery stays blocked, the more heart muscle is permanently lost. And so the goal in medicine overall is to open the artery as fast as possible. Because if people were to restore blood flow early, I say people because like we ain't doing this.

SPEAKER_01 9:07

We ain't doing that.

SPEAKER_02 9:08

Um, but we're helping you recognize if it is. Um, if people, other people who do this, are able to restore the blood flow early enough, the heart, the heart tissue can actually be saved, which is a very encouraging part. This is why they make interventional cardiologists.

SPEAKER_01 9:23

And so understanding this and what's actually happening inside of your body will should change how you think about the symptoms because a heart attack isn't something that just randomly happens for no reason. It's kind of something that's been building up for a while. And if this does happen, then every minute counts.

When To Get Checked Fast

Share It And Stay Connected

SPEAKER_02 9:47

Totally. So if you or someone around you has symptoms like chest pressure, pain spreading to the arm or jaw, shortness of breath, sweating or nausea, it's a good idea not to wait around. You should go get checked out. You know, the fun thing is that not everything that feels and looks like that is a heart attack, but it takes a little bit of testing to figure out whether it is or not. And you are worth that. You deserve. That was me. My knee hit the table. Um, you are worth that. So you should get help immediately because the faster you act, the quicker you'll get an answer. And so we helped, and so we hope this helped you understand not just what a heart attack is, but what is actually happening inside the body when it's happening. Because once you understand the why, we feel like you're in a much better position to recognize it and then respond to it. And if you found this helpful, you can share it with someone you care about. And as always, we'd like to thank you for coming back to another episode of your checkup. Hopefully, you were able to learn something for yourself, a loved one, or a neighbor. You can find us on Threads, you can find us on Instagram, and you can send us an email. Like we said, share this with a loved one or enable or listen to any of our older episodes, but most importantly, stay healthy, my friends. Until next time, I'm Ed Deleski.

SPEAKER_01 11:11

I'm Nicole Arufo.

SPEAKER_02 11:12

Thank you and goodbye.

SPEAKER_01 11:14

Bye.

SPEAKER_02 11:20

This information may provide a brief overview of diagnosis, treatment, and medications. It's not exhaustive and is a tool to help you understand potential options about your health. It doesn't cover all details about conditions, treatments, or medications for a specific person. This is not medical advice or an attempt to substitute medical advice. You should contact a healthcare provider for personalized guidance based on your unique circumstances. We explicitly disclaim any liability relating to the information given or its use. This content doesn't endorse any treatments or medications for a specific patient. Always talk to your healthcare provider for a complete information tailored to you. In short, I'm not your doctor. I am not your nurse. And make sure you go get your own checkup with your own personal doctor.