Stop Ignoring This: The Real Reason 30-Year-Olds Are Having Heart Attacks

Heart disease is widely thought of as a

problem for later life, something that

happens in your 50s or 60s or 70s or

even 80s, but the data tells a very

different story. And I want to walk you

through what the evidence shows in the

first few minutes of this video because

what's happening in the arteries of a

healthy 25-year-old will absolutely

surprise you. So, in a study called

PDAY, P D A Y, the Pathobiological

Determinants of Atherosclerosis in

Youth, researchers performed autopsies

on nearly 3,000 young people aged

between 15 and 34 who had died from road

traffic accidents, car crashes.

Every single teenager they examined had

early atherosclerotic changes in some

part of their arterial system, every

single one of them. By the time these

young people reached their 20s, raised

plaques, so you know, plaques in the

arteries that were starting to protrude

into the lumen, into the space of the

artery, were already present in a good

number of these people. In another

study, the Bogalusa Heart Study, and

I'll put a link in the description below

for you, which looked at young people

from the age of two all the way up to

39, autopsies or postmortems showed that

the extent of the disease in the

arteries scaled directly with the number

of cardiovascular risk factors a person

had during life, even in children.

In the most recent national data, around

one in five heart attacks in the US, at

least, now occurs in somebody under the

age of 35, and as many as a quarter of

those happen in people with no

traditional risk factors at all. If

you're new to the channel, then welcome.

I'm Dr. Alex. I've worked in emergency

medicine for a decade, and as a lot of

you know, my own dad had a heart attack

when he was 40 years old. The youngest

heart attack I've personally treated in

resource was a patient my own age, 33

years old. So, when I tell you that this

matters for people in their 20s and 30s,

I'm telling you what I've seen.

Now,

if you get something useful from this

video today, if this resonates with you,

if you find it valuable, then please

support what I'm doing here by liking

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channel. What that does is that it

allows this video to be pushed to more

and more people who might benefit from

it. And it really does help me keep

making these videos for you. It's the

only thing I'll ever ask of you. Now,

another study called the INTERHEART

study, and again, I'll put a link in the

description below for you, which looked

at heart attacks across 52 different

countries and 30,000 people,

nine modifiable risk factors accounted

for around 90% of the risk of a first

heart attack, 90%.

Genetics obviously does play a bit of a

role, but daily life is the dominant

impulse. And every year that you start

earlier, start changing things in your

life, all of that compounds in your

favor. Now, the medical name for the

entire process that we're talking about

is called atherosclerosis. Athero from

the Greek for porridge, and then

sclerosis meaning hardening, literally

paste and hardening of your arteries.

Now, the coronary arteries are the very

small ones that wrap around the heart

itself and feed the heart muscle because

the heart itself needs blood and oxygen

to actually work and pump. And these are

the ones that we're most worried about

because if one of them blocks, that is

literally what a heart attack is.

Picture an artery like a garden hose

pipe. The water flowing through it is

your blood. The inside of that hose is

lined with a single thin layer of living

cells called the endothelium, which acts

as almost like a non-stick coating. This

coating constantly produces a molecule

called nitric oxide, which keeps your

blood vessels relaxed and open and

inflammation free. Well, as free as

possible, anyway.

In the emergency department, we actually

use this nitric oxide in a drug. So,

when somebody's having a heart attack,

one of the first things that we give

them is something called GTN, glyceryl

trinitrate,

which releases a huge burst of nitric

oxide into the coronary arteries and

opens them up immediately. The molecule

that your arteries produce every second

of every day is so important that we use

a synthetic version of this in emergency

medicine as a medication. Now, going

back to that garden hose pipe, if you

run really hot, sugary, slightly

corrosive water through that hose for

years,

well, that lining will get damaged. That

non-stick coating will start to become a

bit rough and maybe peel in places. It

will produce less nitric oxide. The hose

pipe will start to stiffen and be less

flexible. Now, once that lining inside

your actual arteries is damaged, immune

cells called macrophages arrive at the

injured spot on that lining. They get

stuck and they start eating up the LDL

cholesterol sweeping into the blood

vessel and over that blood vessel wall.

Over time, those cholesterol-engorged

immune cells plus calcium plus fibrous

tissue as well, they build up into

something that we call a plaque. Now, in

the PDAY study, the one that we talked

about earlier, these fatty streaks, the

earliest form of plaque, these were

present in every single 15-19-year-old

examined in the US. By the time these

young people were 25 to 34 years old, so

quite a bit older, raised plaques that

start going into the the vessel

themselves, into that space where your

blood flows were present in around 20%

of them. By the time somebody has a

heart attack at the age of 40, that

plaque has often been growing very

silently since they were a teenager.

Now, atherosclerosis is a very

long-running response to injury, and

modern life provides multiple

simultaneous sources of that injury in

ways that weren't present even one or

two generations ago. The risk factors

that the P D study found driving disease

in young people like high cholesterol

and high blood pressure and glucose

intolerance and obesity and smoking,

these have absolutely intensified

recently. The proportion of young adults

with metabolic syndrome has been rising

steadily for 20 years, and the

proportion who are obese or have type 2

diabetes has roughly doubled in many

countries since the early 2000s.

Now, recent systematic reviews looking

specifically at people under 40 who've

had heart attacks have found that up to

a quarter have none of these traditional

risk factors. What's showing up instead

is a cluster of new drivers, which are

chronic psychological stress, poor

sleep, sedentary work, stimulant use,

social isolation, chronic inflammation

from autoimmune conditions or untreated

dental disease.

And increasingly, spontaneous coronary

artery dissection, where you have a tear

in the wall of coronary artery, can

occur in young women with no plaque at

all. Now, my dad wasn't diabetic, he

didn't have high blood pressure. He was

a working professional, he was a

paramedic in a very high-stress

environment. He was sleeping poorly, he

was eating on the run, and he was

carrying the kind of low-grade chronic

strain that, looking back as a doctor,

was almost certainly part of the

picture. Every young person I've looked

after personally in resus having had a

heart attack had some version of that

same pattern. The cause is rarely just

one single factor. It is the

accumulation of small modern daily harms

that the body cannot keep absorbing

forever. So, what is modern life

actually doing to a young person's

arteries? Well, five things are

happening simultaneously and they all

reinforce each other. The first one is

what we eat. The standard modern diet,

which is high in ultra-processed foods

and refined carbohydrates and added

sugar and industrial seed oils and low

in fiber, low in plants, all of this

raises your LDL cholesterol. It drives

chronic low-grade inflammation or

stiffening of your arteries. It causes

repeated blood sugar spikes that are

directly toxic to the inside of your

blood vessels. And it also promotes the

accumulation of visceral fat. This stuff

that sits packed around your internal

organs deep in the abdomen and it pumps

out inflammatory molecules constantly

that damage your blood vessels.

A meta-analysis in JAMA Internal

Medicine in 2014 found that adults

consuming more than 25% of the calories

from added sugar had nearly three times

the risk of cardiovascular mortality, so

dying from heart disease or a heart

attack or a stroke compared to those

consuming under 10%. The second one is

actually how we sleep and this is the

one that I take most personally because

it was the reason I stopped doing

regular night shifts in the A&E after my

son was born.

What we know is that short sleep, less

than 6 hours a night, increases the risk

of coronary heart disease by roughly 48%

and the reason this is so important is

that during deep sleep, your blood

pressure should naturally dip. Your

sympathetic nervous system sort of

quietens down or switches off a bit, and

your inflammatory markers start to fall,

and your cardiovascular system gets a

genuine rest.

If you sleep for 5 hours, then that dip

doesn't happen. Your heart never really

fully recovers overnight, and over years

and decades, that absolutely causes a

massive impact on the health of your

heart.

The third one is actually how we move,

or rather how we don't move. The average

young office worker sits for roughly 8

or 12 hours a day, and sitting is its

own physiological state with reduced

blood flow to your legs and back to your

heart, with reduced muscle activity and

impaired handling of your glucose as

well. We know that aerobic exercise is

the single most powerful tool that we

have for restoring the endothelial

lining, that lining of your arteries.

The increased blood flow generates what

we call shear stress, the shear with an

e a, not double e, against the vessel

wall. And that mechanical signal

directly tells the endothelium to

produce more nitric oxide. So, this is

what we need more of. Now, the fourth

one is chronic stress. Now, what stress

actually does in your body is switch on

two systems and then leaves them

switched on. The first one produces

cortisol. The second one produces

something called adrenaline or

epinephrine if you're in America. What

cortisol does is drives up your blood

sugar and pushes fat into storage around

your organs. It raises your blood

pressure, and it increases the levels of

inflammation in your body. Adrenaline or

epinephrine keeps your heart rate up,

your blood vessels really tight, and

your platelets in your blood really

sticky, which helps your blood to clot

even more, which can then cause things

like a heart attack.

Imaging studies have actually shown that

in the stress centers of the brain

predicts real heart attacks years down

the line.

And the reason this is so important is

that chronic stress is now treated as a

cardiovascular risk factor in its own

right on par with high blood pressure.

And then finally the fifth one is being

alone too much. A meta-analysis of 90

different studies covering more than 2

million people found that social

isolation was linked to a 34% increase

in cardiovascular deaths.

Loneliness, which is the feeling of

being isolated, was linked to a 14%

increase in dying from any cause. And

really the mechanism is the same as

stress. We're talking about chronic

activation of the stress response, more

inflammation, worse sleep, worse habits.

Remember that humans evolved to live in

communities in close groups, and modern

life really is a biologically very

strange place for our hearts to live.

And the way that I try and approach all

of this is with a framework that I've

come up with called the RESET method. R

E S E T, reset.

And this stands for the five things that

the evidence consistently shows moves

the needle on cardiovascular risk. And

that is rest, and eating, and social

connection, exercise, and then thought

or mood. So rest comes first because

everything else falls apart when you're

sleep deprived. Your self-control around

food collapses, your motivation to

exercise disappears, your mood

absolutely tanks as well, your

inflammation rises. And I know this

because I've been sleep deprived for

most of 10 years working night shifts in

the A&E. The target really is 7 to 9

hours every single night at roughly the

same time each day, including the

weekends. And really, you need to try

and become an expert sleeper. Treat your

sleep as important as you do with your

diet and exercise, as well. You need to

try and get morning light within the

first hour of waking up, or just as soon

as the sun comes up. Get morning light

straight into your eyes. Try and stop

caffeine after midday, because it stays

in your system for around 5 or 6 hours

because of the half-life. A coffee, you

remember at 3:00 in the afternoon, is

still in your bloodstream when you're

trying to get ready for bed at 9:00. You

need to try and keep your bedroom dark

and cool, and get rid of the screens for

the last half an hour before bed. So, no

TV, no phones. Just keep it in a

different room and have a normal

old-style alarm clock on your bedside

table. And if you snore loudly, or you

wake up tired, or your partner has

noticed pauses in your breathing at

night, which is really, really common

these days, then you need to get checked

for something called sleep apnea. It's

one of the most under-diagnosed and most

fixable causes of bad sleep, and also a

major driver of cardiovascular disease.

Now, E is for eating. So, the eating

pattern with the strongest evidence

behind it is the Mediterranean diet, or

the whole food diet, which is really

just what people in Southern Europe were

eating 50 years ago. In the PREDIMED

trial, people at high cardiovascular

risk who ate this Mediterranean-style

diet with extra-virgin olive oil or nuts

had around a 30% lower risk in major

heart events, like heart attacks,

compared to those who ate a low-fat

diet, but that was not the

Mediterranean-style diet. They still

contained ultra-processed foods.

So, you need to build your meal around

three things: protein in the form of

eggs and fish and chicken and lentils

and beans, occasional red meats as well,

and Greek yogurt, aiming for around 20

to 40 g per meal. You need to build it

around plants, including veg and fruit

and legumes and whole grains and herbs

and spices as well, and nuts and seeds,

aiming for around 30 different plant

foods over the week. And that sounds

like a lot, but remember that spices and

herbs count as well, and so do nuts. And

the third thing is healthy fats with a

really, really good extra virgin olive

oil as your main oil in your food and

the one that you cook with as well. And

also oily fish a couple of times a week.

And then, you need to really try and cut

out three things as well. The first one

is ultra processed food, and the reason

is obvious. The second one is added

sugar, especially in liquid form, like

fizzy drinks and fruit juice. And the

third one is refined carbs eaten on

their own, like white toast or a pastry

with nothing else. Remember, toast is a

completely different thing when it's got

eggs and avocado and rocket on it. It's

fruit eaten with nuts or yogurt causes a

much smaller glucose spike than fruit on

its own. But really, by default, if you

cut out ultra processed foods, then you

cut out all the bad stuff. S is for

social connection. Now, the data is

really, really shocking here. Some

analyses put the cardiovascular cost of

loneliness in the same range as smoking

up to 15 cigarettes a day.

We know that chronic loneliness, feeling

lonely, raises your cortisol, which is

your main stress hormone. It raises your

inflammatory levels. It raises your

blood pressure and worsens your sleep.

It's the same mechanisms we've already

been through in this video. And really,

you know, this is quite a tricky one for

a lot of people, but you need to try and

aim for at least one in-person

interaction with somebody you genuinely

like or love most days of the week. And

phone calls are fine as well. WhatsApp

calls, these are okay as well. Try and

schedule social time the same way that

you schedule the gym or going for your

weekly food shop. Because as adults, we

drift apart from people by accident, not

on purpose.

If you've lost touch with somebody that

you used to be very close to, then just

send them a message. Send them a

WhatsApp. Tell them about your family or

your new job or something you've been

doing. And I guarantee that most people

will be very glad to receive a message

like this. Most of the time, the other

person is waiting for you to make the

move. You know, and vice versa, both of

you. So, one of you has got to move

first. The quality of your closest

relationship is probably the single

biggest social input on your

cardiovascular system. Living with a

partner that you regularly argue with or

feel unsupported by carries a real

biological cost. So, working on that

relationship is in a real sense a

cardiovascular intervention. Now, E is

for exercise. And the shorter version

really is to do more than you currently

do in three different forms. So, the

first one is aerobic exercise like

running or walking uphill or cycling or

swimming or brisk walking. That is the

foundation. The target is Well, what

they say is 150 minutes a week of

moderate intensity, which works out at

roughly 30 minutes 5 days a week, where

you're quite out of breath, where it's

hard to hold a full conversation without

breathing really deeply.

What this does is that it helps to

restore the lining of your blood

vessels. It raises your good

cholesterol, your HDL cholesterol. It

drops your blood pressure and improves

your insulin sensitivity. The second one

is high-intensity interval training or

HIIT training. And this adds something

on top of that aerobic work. It improves

specifically your VO2 max, which your

Garmin, if you have one, will track for

you. And this is one of the strongest

predictors of how long you live that we

actually have. So, two short hit

sessions a week, even 10 or 15 minutes,

absolutely is enough. The third one is

resistance training, which we used to

think was a bit separate from your heart

health. But, the evidence has shifted.

Muscle is one of the main tissues that

pull sugar out of your bloodstream,

which means more muscle directly

improves how well insulin works as well.

Strength training also protects your

bones. It prevents the muscle loss that

creeps up after your 30s, and it reduces

your risk of dying from any cause. Quite

bluntly, this is what the evidence says.

So, again, try and aim for two sessions

a week if you can, hitting your major

muscle groups, which is mainly your legs

and your shoulders and your chest and

your core as well. And then, finally, T

is for your thought and your mood as

well. So, the aim is to interrupt this

chronic stress response. You want your

nervous system to come back down out of

your fight or flight response and then

into your rest and digest response, your

parasympathetic nervous system, on a

regular basis throughout the day.

And three things work with pretty good

evidence behind each one of them. The

first one is slow breathing with

exhalations longer than your

inhalations. This directly activates

your vagus nerve. And 5 minutes of this

produces really good changes in your

heart rate variability, which

corresponds with how stressed you are.

And again, your garment, if you have

one, can measure this for you. The next

one is regular time outdoors, especially

in green, natural settings. This drops

your cortisol really noticeably after

around 20 minutes. And there's a reason

why David Attenborough has lived to be

100 years old. He spent most of his time

outdoors.

And then, the third one is pretty

obvious. It's dealing with the actual

source of the stress where you can. So,

this could be a job that is absolutely

destroying you, or a relationship that's

grinding you down, or a financial

situation keeping you up at night. All

of these

Yes, are very easy for me to say on a

video, and are not that easy to fix, but

all of these feed directly into your

cardiovascular system. So, if you're

experiencing persistent low mood or

anxiety or signs of depression,

then treat that as a cardiovascular risk

factor

because it actually is one. Depression

is associated with roughly double the

risk of heart disease in young people.

And what I want you to take away from

this video is this. Heart disease really

does begin in your teenage years and

your 20s because this is what these

autopsies and postmortems actually show.

With damage to the inside of your

arteries that you cannot feel, you

cannot see on a standard test, and will

not show up until decades later.

In modern life, that process is being

sped up in young people by a combination

of poor food, poor sleep, being

sedentary, chronic stress, and also

social isolation as well, largely

because of tech these days. All of it is

acting through the same final pathway of

endothelial damage and inflammation, and

plaque building up in your arteries.

But, the encouraging part about all of

this is that the window for changing all

of this is really big.

Every domain in that reset method, r e s

e t, is modifiable. Every one of them

responds to intervention that you can

measure, often within weeks, and all of

it is free as well. You don't need to

spend any money. Aerobic exercise

restores the lining of your blood

vessels. Sleep allows the heart to

recover. Your diet will shift

inflammation and cholesterol as well.

Social connection lowers your cortisol

levels, and managing stress brings the

nervous system back into balance. And

again, none of this requires a

supplement. None of it requires a

prescription. All of this is available

to you right now for free. And I think

about my dad's heart attack quite a lot

when I talk about these things on this

channel, and the patients and research

who I've seen that are my age having

heart attacks. And the things that they

have in common aren't bad luck. It is

years of small ignored signals of

carrying the modern lifestyle day after

day until the system finally gave way.

So, if you're in your 20s or your 30s,

then you have to start thinking about

the things that you do every single day

that could very slowly be causing damage

to your heart. And if you start thinking

about these things right now in your 20s

or 30s, then you've got a decade ahead

of you where you can be making changes

to hopefully prevent a heart attack from

ever happening in the first place.