Nine in Ten Heart Disease Deaths Are Preventable: What a New National Study Says You Can Control
A number stopped me this week. In a new national analysis published in JAMA Cardiology, researchers found that almost nine out of ten deaths from coronary artery disease could have been prevented. Not by a drug we haven’t invented yet, and not by some breakthrough still in a lab. By managing the same handful of risk factors I talk through with patients every day in my Encinitas office. I want to walk you through what the study found, because the headline cuts both ways, and both halves are worth your attention.
The good news first
Coronary artery disease is what happens when the arteries feeding your heart muscle get clogged with plaque. Starve the muscle of blood long enough and you get a heart attack. It’s still the leading cause of death in this country, and it has been for a long time.
Here’s the encouraging part. Deaths from this kind of blocked-artery heart disease fell by more than half in the United States between 1990 and 2023. That’s a genuine win, built over three decades. A lot of it came from people quitting cigarettes and from cleaner air. Deaths tied to smoking dropped by a third. Deaths tied to fine-particle air pollution dropped by three quarters. Better treatments in the hospital helped too, along with widespread statin use and better blood pressure control.
Where you live shaped how much progress you saw. States like Massachusetts, New Jersey, and Minnesota cut their heart disease death rates the most, by more than 60 percent once you adjust for age. States that put real policy behind tobacco control tended to do better. The highest death rates today still cluster in Kentucky, Tennessee, West Virginia, Mississippi, and Arkansas. Geography isn’t destiny, but it tells you something about how much the environment around a person pushes their risk up or down.
Now the hard part
In the most recent year the researchers looked at, there were roughly 473,000 coronary artery disease deaths. Of those, about 419,000, which is 88.8 percent, were linked to risk factors a person can change. Read that again. Almost nine in ten of these deaths trace back to things we already know how to treat.
One of the study authors, a cardiologist at the University of Washington, put it plainly. He said he sees patients every week who don’t know that for the leading cause of death in America, we understand how to modify the risk so well that we could potentially remove 80 or 90 percent of it. I have the same experience. People assume heart disease is mostly luck or genes. Genes load the gun, but the risk factors pull the trigger, and most of those risk factors are ones you and I can work on together.
So what’s actually driving these deaths? The study ranked them. High blood pressure led the list, tied to 47 percent of coronary deaths. Poor diet came next at 39 percent. High LDL cholesterol, the so-called bad cholesterol, accounted for 28 percent. Behind those sit the familiar crowd. High blood sugar, extra weight, physical inactivity, smoking, and alcohol.
The two numbers moving the wrong way
Most risk factors have improved since 1990. Two have gotten worse, and they concern me the most.
Body mass index, a rough measure of weight relative to height, has climbed 12.5 percent across the population. Average blood sugar levels have climbed 10.5 percent. Those two travel together, and they point at the same problem, the rising tide of obesity and diabetes. Progress on heart disease actually stalled around 2010, right as these two trends picked up steam. We got so good at lowering cholesterol and blood pressure and getting people to quit smoking that weight and blood sugar are now the frontier we keep losing ground on.
This is why I spend so much clinic time on weight, food, and blood sugar even when a patient came in to talk about their heart. They’re the same conversation. When high blood sugar, a wide waistline, and high blood pressure show up together, you’re often looking at the cluster I describe in my article on metabolic syndrome, and treating the whole picture beats chasing any single lab value. A 2026 guideline now formalizes that idea and folds the kidneys into it as well, which I walk through in my post on the new CKM syndrome guideline.
What this means for you, specifically
The frustrating thing about coronary artery disease is that it builds in silence. Plaque forms in your arteries over decades without a single symptom. There’s no ache to warn you, no signal to send you to a doctor, right up until the day an artery closes and causes a heart attack. That silence is exactly why prevention has to be deliberate. You can’t wait to feel it.
The good news is that the invisible risk factors are measurable. A checkup catches them. Here’s the short list I’d want every adult to know their numbers on.
Your blood pressure, since it’s the single biggest contributor and one of the easiest to treat. If you’re not sure where you stand, a home cuff tells you more than a once-a-year reading in my office, and I explain how to do it right in my guide to home blood pressure monitoring. If your numbers run high, the stakes are real, and I lay them out in my piece on how blood pressure drives long-term risk.
Your LDL cholesterol, because lowering it lowers heart attacks, full stop. That connection is as solid as anything in cardiology, and I go through it in my guide to LDL cholesterol.
Your blood sugar and your weight, the two numbers trending the wrong way nationally. Getting ahead of prediabetes changes the trajectory.
And for people in the gray zone, where the standard risk calculators can’t quite tell us whether to treat, a coronary calcium scan can settle the question by taking a direct look for plaque. It’s one of the most useful tools I have for personalizing a prevention plan, and I explain who should consider it in my article on the coronary artery calcium score.
Why I don’t lead with medication
Notice what the study emphasized. Its senior author was careful to say the main message is not that everyone needs pills. The main message is that these risk factors respond to change. That matches how I practice.
Cutting back on the things that raise blood pressure and blood sugar, moving your body most days, eating in a pattern built around vegetables, whole grains, fish, and olive oil, these move the needle more than most people expect. A Mediterranean-style way of eating has the best track record for the heart, and I laid out how I think about it in my article on the Mediterranean diet. Weight loss, even a modest amount, pulls blood pressure and blood sugar down at the same time.
Medication has its place, and for the right person a statin is one of the most protective drugs we have. But the foundation is the stuff you control between visits. The newer weight-loss medications are powerful, and they’ll probably show up as a bigger factor in the next version of this analysis. Right now, though, they aren’t reaching most of the people who’d benefit, so they can’t be the whole plan.
The line I keep coming back to
Coronary artery disease is preventable. That’s the sentence from this study I’d tattoo on the wall of every waiting room if I could. We’ve cut deaths in half over a generation, and the analysis says we’ve left another 80 to 90 percent on the table, reachable with tools already sitting in every doctor’s office.
The catch is that prevention asks something of you before anything hurts. It means knowing your blood pressure, your cholesterol, and your blood sugar while you still feel fine, and acting on them early, before a warning that may never come until the heart attack itself. If you don’t know those three numbers right now, that’s the place to start. Book the checkup, get the labs, and let’s look at them together. The study makes the case better than I can. Most of this is within your control, and the earlier we act, the more of it we can prevent.
This post is for education and isn’t a substitute for personal medical advice. Talk with your own physician about your risk factors and what screening makes sense for you.