# Nine things cause most heart attacks. You can move almost all of them.

> Most first heart attacks trace back to a short list: smoking, ApoB, blood pressure, blood sugar, belly fat, inactivity, stress, poor diet and alcohol. Find out where you stand, including ApoB and Lp(a), quit smoking, get fit, lower insulin, sleep, and ask your doctor whether a calcium scan would change your plan.

- URL: https://www.plansforyourbody.com/plans/lower-heart-attack-risk/
- Categories: Heart & circulation
- Updated: 2026-10-06
- Not medical advice: Discuss everything here with a medical doctor before acting on it — supplements included. Your doctor has your bloodwork and history. We have neither.

## The goal

A heart attack rarely comes from one bad number. It comes from several mediocre ones, stacked for decades. Your cholesterol gets checked, your blood pressure gets checked, and nobody adds them up. This plan adds them up, works on the ones that carry the most weight, and tells you which tests to ask your doctor for.

- **Measure:** ApoB · Lp(a) once · home blood pressure · HbA1c and insulin · waist · fitness · smoking
- **Change:** Quit smoking · get fit · lower insulin · lift · sleep · manage stress
- **Decide:** Your risk score, and whether a calcium scan would change the plan

## Why it matters: The first symptom is often the heart attack.

- **The default:** Wait for chest pain. Plaque builds silently for decades, and for many people the first sign of coronary disease is the event itself. Being told your cholesterol is “borderline” and your blood pressure is “a bit high” doesn’t add up to “fine”.
- **The better bet:** In INTERHEART, a study of about 30,000 people in 52 countries, nine modifiable factors accounted for over 90% of the risk of a first heart attack. Same list in men and women, on every continent. That’s a lot of risk sitting on things you can change.

## How it works: Particles build the plaque. Everything else decides if it ruptures.

ApoB particles (LDL and its cousins) get trapped in the artery wall. That’s where plaque starts, and the more particles, for more years, the more plaque. Most heart attacks happen when a plaque cracks and a clot forms on it. High blood pressure, high insulin, smoking and inflammation all damage the wall and make that crack more likely. Sniderman’s work is on the first half; Jamnadas talks most about the second.

- **ApoB:** One particle, one ApoB. It counts the particles that build plaque. Lifetime exposure is the variable: a moderate number for 40 years can beat a high number for 5. Details in the cholesterol plan.
- **Lp(a):** A genetic, extra-sticky ApoB particle. Diet barely moves it. A high level raises risk at any LDL, which makes everything else on this page matter more.
- **Blood pressure:** Pressure batters the artery lining and speeds plaque growth. A major contributor in INTERHEART. Details in the blood pressure plan.
- **Insulin and visceral fat:** High insulin and the fat packed around your organs drive inflammation, raise blood pressure, and push the lipid pattern the wrong way. Jamnadas puts this at the centre.
- **Smoking:** Damages the lining, thickens the blood and makes clots more likely. In INTERHEART, current smoking alone carried about a third of the population risk. Stopping takes away much of the extra heart risk, fastest in the first few years, but not all of it.
- **Fitness:** Low cardiorespiratory fitness predicts early death more strongly than smoking or diabetes did in a Cleveland Clinic study of 122,000 treadmill tests. It’s also the factor most people can change fastest.
- **Coronary calcium (CAC):** A low-dose CT scan that shows calcified plaque. Zero means little calcified plaque now. Above zero means the disease is already there, whatever your risk score said. In Michael Blaha’s analysis of 6,814 people in the MESA study, a zero score was the strongest reassuring result of 13 markers tested, ahead of carotid ultrasound and blood tests.

## The steps: Know your stack. Fix the heavy ones first. Decide with your doctor.


### Right now (Before anything else): Know the signs. Don’t drive yourself.

- **Heart attack signs** (call 9-1-1): Chest pressure, squeezing, burning or heaviness; discomfort in the arms, neck, jaw, shoulder or back; shortness of breath; sweating; nausea; light-headedness. Women more often have no chest pain. Call 9-1-1, don’t wait it out.
- **Aspirin** (don’t start it yourself): Daily low-dose aspirin for prevention is no longer a default: bleeding risk can outweigh benefit, especially after 60. If you don’t have heart disease, ask your doctor before starting. If you already take it, don’t stop without asking.

### Measure (Week 0): Add up the stack.

- **Your risk score** (ask your doctor): Canadian doctors use a 10-year risk score (Framingham) built from age, sex, cholesterol, blood pressure, diabetes and smoking. Ask for your number and what category it puts you in.
- **ApoB and Lp(a)** (ApoB now, Lp(a) once): The two lipid tests that matter most for risk. The CCS recommends Lp(a) once in every adult’s life. The cholesterol plan covers how to read them.
- **Home blood pressure** (7 days, done properly): An upper-arm cuff, morning and evening, averaged. Office readings mislead in both directions. The blood pressure plan has the method.
- **Fasting insulin and glucose** (morning, after an overnight fast): Together they give HOMA-IR, a simple insulin-resistance score. Fasting insulin often isn’t covered in Canada. It’s cheap to pay for. Insulin resistance raises heart risk years before your glucose looks abnormal.
- **HbA1c** (three-month blood sugar): Diabetes was one of the nine INTERHEART factors. Prediabetes is the warning before it.
- **Waist** (tape measure): At the belly button. More than half your height points to visceral fat. Abdominal obesity, not body weight, was the measure in INTERHEART.
- **Fitness** (simple test): Ask for a treadmill stress test if your doctor thinks you need one, or time a brisk 1.6 km (1 mile) walk and repeat it monthly. You want the trend, not a trophy.
- **Family history and snoring** (tell your doctor): A father or brother with a heart attack before 55, or a mother or sister before 65, raises your risk. Loud snoring with daytime exhaustion suggests sleep apnea, which raises blood pressure and risk.

### Change the inputs (Months 1–6): Biggest levers first.

- **Stop smoking** (everything else is second): Including vaping and cigars. Quitting cuts the heart risk smoking adds, fast at first: in Framingham data, heavy smokers who quit had about 39% lower cardiovascular risk within 5 years than those who kept smoking. It doesn’t go all the way back. Their risk stayed above a never-smoker’s for at least 5–10 years, possibly up to 25. Harm reduction, not a full repair, and still the biggest single win on this page. Ask your doctor about stop-smoking medication and support; going it alone is the hardest way.
- **Get fit** (150+ min/week, plus intervals): Brisk walking, cycling or swimming most days, and once or twice a week some harder intervals (e.g. 4 × 4 minutes hard, 3 minutes easy). Fitness is measurable, trainable, and one of the strongest predictors on this page. Rhonda Patrick treats VO2 max, the top end of your aerobic fitness, as a number worth training on purpose; the harder intervals are what move it.
- **Training** (strength 2–3×/week, cardio 150+ min/week): Lift, and walk briskly or cycle most days. Muscle is where most of a meal’s glucose ends up, so more muscle means more room for it. Cardio makes that muscle more sensitive to insulin. Muscle soaks up glucose and lowers insulin; strength also keeps you able to train into old age.
- **Sugar and refined carbs** (cut hard): Sugar, sweet drinks, juice, white flour and most packaged snacks. The fastest lever on insulin, blood sugar and triglycerides. Lowers insulin, triglycerides and blood pressure at once.
- **Real food** (protein first): Build meals on protein, vegetables and natural fats: fish, meat, eggs, dairy, legumes, nuts. Protein and fibre keep you full and flatten glucose spikes.
- **Fats to cook with** (olive oil first): Extra-virgin olive oil, avocado and its oil, nuts, oily fish. Olive oil has the strongest trial evidence: in PREDIMED, a Mediterranean diet with extra olive oil cut heart attacks and strokes.
- **Eating window** (daily, e.g. noon to 8 pm): Eat inside a fixed window and not outside it. Fewer insulin spikes per day, fewer chances to overeat. Jamnadas uses fasting to lower insulin and draw down visceral fat, the inflammatory fat around the heart and organs.
- **Sleep** (7+ hours): One short night measurably worsens insulin sensitivity, blood sugar and appetite the next day. The cheapest part of the protocol, and the most skipped. The AHA added sleep to its heart-health checklist in 2022: 7–9 hours for adults.
- **Alcohol** (none while fixing the numbers): It goes straight to the liver, raises triglycerides and adds to liver fat. Less is better; none is best while you’re fixing the numbers. It raises blood pressure and triglycerides. Wine is not heart medicine.
- **Stress** (treat it as a risk factor): Psychosocial stress carried about as much population risk as smoking in INTERHEART. Training, sleep and time outdoors help. If it’s depression or anxiety, that’s a doctor’s visit, not a mindset.
- **Sauna** (optional extra, not a substitute): Rhonda Patrick makes the case for regular sauna as heat stress the cardiovascular system adapts to. In a 20-year Finnish study of 2,315 men, those who used one 4–7 times a week had 63% fewer sudden cardiac deaths than once-a-week users. Observational: sauna users may be healthier in other ways, and no trial has tested it. If you have heart disease or chest symptoms, ask your doctor first; no alcohol, drink water.

**Before you fast:** Don’t do extended fasts if you’re on insulin or other diabetes medication, pregnant, breastfeeding, underweight, or have a history of eating disorders, unless your doctor approves.

### Supplements (optional · discuss with your doctor first): One with outcome data.

- **Potassium-enriched salt** (Use it in place of regular salt): It swaps some sodium for potassium. In a five-year trial of about 21,000 older adults with high blood pressure or a past stroke, it cut strokes by 14% and deaths by 12%; pooled trials found systolic pressure about 4–5 mmHg lower. Don’t use it if you have kidney disease or take a drug that raises potassium (such as spironolactone): potassium can build up to dangerous levels. In a 21,000-person trial it cut strokes by 14% and deaths by 12%. Some blood pressure pills raise potassium too, so ask your doctor first.

### With your doctor (Month 1, then as needed): Questions worth asking.

- **A coronary calcium scan** (ask your doctor): Most useful if your risk is intermediate and you’re undecided about medication. A score of zero can support waiting; above zero tips the balance toward treatment. Zero isn’t a free pass: in a 16-year MESA follow-up by Blaha’s group, smokers with a zero score still had about twice the event rate of non-smokers with zero, and diabetes and high blood pressure still counted too. Often not publicly covered; ask what it costs.
- **Lowering ApoB** (ask your doctor): If ApoB or LDL stays high after the lifestyle work, or your risk is high from the start, ask your doctor about statins and other lipid-lowering medication. Needing one isn’t failure; it’s arithmetic.
- **High Lp(a)** (ask your doctor): Food and fasting don’t lower it. Your doctor will usually treat your other risk factors harder; ask what else is available to you. Ask whether your siblings and children should be tested.
- **Blood pressure and blood sugar** (ask your doctor): If either stays high after 3–6 months of serious effort, medication is the next step. Take your home log and before-and-after numbers.

### Retest (Months 4–6): Recount the stack.

- **Same tests** (same lab if you can): ApoB, lipid panel, HbA1c, fasting insulin and glucose. On a normal eating day, not mid-fast.
- **Home blood pressure, waist, walk time** (monthly): Three numbers you can track yourself. All three should be moving the right way.
- **Recalculate your risk** (with your doctor): Your score should fall as smoking, blood pressure and lipids improve. Lp(a), age and family history won’t move; that’s fine, they’re why you pushed the rest.
- **If the numbers won’t move** (your doctor): Take the before-and-after numbers to your doctor. Whether you need medication is their call. Needing it isn’t failure.

## The rules: Short list. No exceptions.

**Choose:**
- Walking or cycling most days, and intervals once or twice a week
- Lifting two or three times a week
- Protein, vegetables and olive oil at every meal
- Seven to nine hours of sleep

**Avoid:**
- Cigarettes, vapes, cigars. All of them.
- Sugar, sweet drinks and white flour
- Alcohol as a heart supplement
- Starting or stopping aspirin on your own

**Non-negotiables:**
- Measure ApoB, and Lp(a) once in your life.
- Know your home blood pressure, not just your office reading.
- Chest pressure, jaw or arm pain, breathlessness or cold sweat: call 9-1-1.
- Talk to a medical doctor before you fast or change any medication.

## Checkpoints: What to track, and what good looks like.

Your doctor sets your targets from your overall risk. These are common reference points so you know what you’re looking at.

| What | Target | How and when |
|---|---|---|
| Smoking | Zero. Not fewer. | Including vaping and cigars. |
| ApoB | <0.9 g/L (90 mg/dL) for most; lower if high risk | Blood test. Retest at 4–6 months. |
| Lp(a) | Below 100 nmol/L (50 mg/dL) | Once. At or above this, the CCS advises more intensive work on every other risk factor. |
| Home blood pressure | <135/85 (Canada) · <130/80 (US guideline) | 7 days, morning and evening, discard day one, average the rest. |
| HbA1c | <6.0% (Canada); <5.7% by the US definition | Every 4–6 months while you’re making changes. |
| HOMA-IR | Under ~1.0 ideal; over ~2.5 suggests insulin resistance | Fasting glucose (mmol/L) × fasting insulin (µU/mL) ÷ 22.5. |
| Waist-to-height | <0.5 | Monthly, at the belly button. |
| Fitness | Better than last month | Time a brisk 1.6 km walk, or your doctor’s treadmill test. Higher fitness, lower risk, with no ceiling found. |
| Sleep | 7–9 hours | A week’s average. Loud snoring: ask about a sleep test. |
| Omega-3 index | 8% or higher; 4% or lower carried the most risk | Optional finger-prick test of EPA+DHA in red blood cells. Rhonda Patrick uses it to steer oily-fish intake by result, not by guess. If you’re considering a supplement, discuss with your doctor first. |

Calcium score isn’t on this list because it isn’t something you retest often: it measures plaque you already have, and lifestyle changes don’t make it go down.

## Where experts disagree: Where the doctors don’t agree.

Nobody disputes the big risk factors. The arguments are over who should get extra testing, how far ahead to look, and which old habits to drop.

### Should more people get a calcium scan?

- **Calcium score advocates: Blaha, Budoff (MESA researchers):** A score of zero identifies many people at low near-term risk who may defer a statin; a high score finds disease that a risk calculator missed. It personalises the decision. Blaha’s own data add a caveat: in smokers and people with diabetes, zero is less reassuring.
- **Screening sceptics: DANCAVAS trialists, USPSTF:** In a randomised trial of 46,000 Danish men aged 65–74, screening that included a calcium scan did not significantly reduce deaths. Scans cost money, involve radiation and find incidental things that need chasing.

**Our read:** The CCS position is sensible: use it when the result would change what you do, typically intermediate risk and undecided about a statin. Not as a routine check-up.

### Ten-year risk, or lifetime risk?

- **Ten-year scores: most guidelines, including CCS:** Treat people whose risk over the next decade is high enough that the benefit of medication clearly outweighs side effects and cost.
- **Lifetime exposure: Sniderman, Thanassoulis:** Plaque grows with the number of ApoB particles times the years. A 40-year-old with high ApoB has a low ten-year score and a bad lifetime outlook. Waiting for the score to rise wastes the years when lowering ApoB does most good.

**Our read:** If you’re young and your ApoB or Lp(a) is high, a reassuring ten-year score isn’t the whole story. Start the lifestyle work now and have the lifetime conversation with your doctor.

### Should healthy people take daily aspirin?

- **The old advice: USPSTF 2016:** Selected adults aged 50–69 at higher risk could take low-dose aspirin to prevent heart attacks.
- **The new advice: USPSTF 2022:** Don’t start aspirin for prevention at 60 or older: bleeding risk cancels the benefit. Between 40 and 59 at higher risk, it’s an individual decision with small net benefit.

**Our read:** If you don’t have heart disease, aspirin is a conversation with your doctor, not a habit. If you do have heart disease, it’s a different question; don’t stop it on your own.

### Is it the particles or the metabolism?

- **Metabolism first: Jamnadas:** Insulin resistance, visceral fat and inflammation inflame the artery wall and destabilise plaque. Fasting and cutting refined carbs go after the cause.
- **Particles first: Sniderman:** No ApoB particles in the wall, no plaque. However good your metabolism, high ApoB has to come down.

**Our read:** You need both. The cholesterol plan covers this fight in detail; for heart-attack risk, fix the metabolism and check that ApoB followed.


## Limits: What no plan fixes.

- **Genes and age:** Lp(a), familial high cholesterol, family history and birthdays don’t respond to effort. If they’re against you, medication is often part of the plan, not a sign it failed.
- **Plaque you already have:** Better numbers slow plaque and can make it more stable. They don’t erase a calcium score. If you have symptoms, a high score or known heart disease, your cardiologist runs the plan; this page supports it.
- **Symptoms:** Chest pain on exertion, breathlessness that’s new, or palpitations with dizziness are not lifestyle projects. See your doctor now; call 9-1-1 if they come on suddenly.

*The plan lowers the odds. It doesn’t replace a cardiologist when you need one.*

## Resources

- [Why this cardiologist recommends fasting](https://drchatterjee.com/513) — Pradip Jamnadas, MD, on Feel Better, Live More. Jamnadas on insulin, visceral fat, inflammation and plaque, in his own words.
- [Apolipoprotein B particles and cardiovascular disease: a narrative review](https://pubmed.ncbi.nlm.nih.gov/31642874/) — Allan Sniderman, MD, et al.. The case for counting particles, and for thinking in lifetime exposure.
- [2021 CCS Guidelines for the Management of Dyslipidemia](https://ccs.ca/guideline/2021-lipids/chapter-1-introduction/) — Canadian Cardiovascular Society. What your Canadian doctor is working from: risk scores, ApoB, Lp(a) and when a calcium scan helps.
- [Emergency signs: when to call 9-1-1](https://www.heartandstroke.ca/heart-disease/emergency-signs/heart-attack-and-stroke) — Heart & Stroke. Read it once. Make sure the people you live with have too.
- [Sauna use as a lifestyle practice to extend healthspan](https://pubmed.ncbi.nlm.nih.gov/34363927/) — Rhonda Patrick, PhD, and Teresa Johnson. A review of the sauna cohort data and the proposed mechanisms. Strong associations, no trials.

## Questions

### What is the biggest risk factor for a heart attack?

At population level in INTERHEART, an unfavourable ApoB-to-ApoA1 ratio and smoking carried the most risk, followed by stress, belly fat and high blood pressure. For you, it’s whichever of those you have the most of. That’s why you measure.

### How quickly does heart risk fall after quitting smoking?

Quickly at first. In Framingham data, heavy smokers who quit had about 39% lower cardiovascular risk within 5 years than those who kept going. But their risk stayed above a never-smoker’s for at least 5–10 years, possibly up to 25. Quitting cuts the risk smoking adds; it doesn’t erase it. Worth it at any age. Lungs and cancer risk are your doctor’s territory.

### Should I get a coronary calcium scan?

Ask your doctor. It’s most useful when your risk is intermediate and the result would change whether you take a statin. It isn’t a routine screening test, and it doesn’t replace ApoB or blood pressure. If you smoke or have diabetes, a zero score reassures less: Blaha’s MESA work found those risks still showed up in people with no calcium.

### Can I have a heart attack with normal cholesterol?

Yes. LDL can look normal while ApoB is high, Lp(a) is genetic and not on a standard panel, and smoking, blood pressure, diabetes and inactivity carry their own risk. That’s why this plan looks at the whole stack.

### Do women have different heart-attack symptoms?

Often, yes. Women more often have shortness of breath, upper back pressure, nausea, light-headedness or extreme fatigue, sometimes without chest pain. Call 9-1-1 either way.

### Does exercise really lower heart-attack risk that much?

Fitness is one of the strongest predictors of survival in large studies: in 122,000 treadmill tests, the least fit had about five times the death rate of the fittest. Fitness also lowers blood pressure, insulin and triglycerides.


## Sources

- Pradip Jamnadas, MD — Cardiologist, Florida. Clinical assistant professor; known for his lectures on fasting, insulin and heart disease.
- Allan Sniderman, MD — Cardiologist, McGill University. Leading advocate of ApoB and lifetime-exposure thinking.
- Salim Yusuf, MD — Cardiologist and epidemiologist, McMaster University. Led the INTERHEART study.
- Donald Lloyd-Jones, MD — Cardiologist and epidemiologist, Northwestern University. Led the AHA’s Life’s Essential 8.
- Michael Blaha, MD, MPH — Preventive cardiologist, Johns Hopkins. Director of clinical research at the Ciccarone Center; leading researcher on coronary calcium scoring in the MESA study.
- Rhonda Patrick, PhD — Biomedical scientist (PhD, biomedical science). Research and reviews on micronutrients, omega-3s, sauna and ageing; FoundMyFitness.

1. [INTERHEART: a study of risk factors for first myocardial infarction in 52 countries](https://www.acc.org/latest-in-cardiology/clinical-trials/2011/01/24/22/24/interheart). American College of Cardiology (summary of Yusuf et al., Lancet 2004), 2004.
2. [2021 Canadian Cardiovascular Society Guidelines for the Management of Dyslipidemia](https://pubmed.ncbi.nlm.nih.gov/33781847/). Canadian Journal of Cardiology, 2021.
3. [Apolipoprotein B particles and cardiovascular disease: a narrative review](https://pubmed.ncbi.nlm.nih.gov/31642874/). JAMA Cardiology, 2019.
4. [Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement](https://pmc.ncbi.nlm.nih.gov/articles/PMC9639807/). European Heart Journal, 2022.
5. [Association of cardiorespiratory fitness with long-term mortality among adults undergoing exercise treadmill testing](https://pmc.ncbi.nlm.nih.gov/articles/PMC6324439/). JAMA Network Open, 2018.
6. [Association between sauna bathing and fatal cardiovascular and all-cause mortality events](https://doi.org/10.1001/jamainternmed.2014.8187). JAMA Internal Medicine, 2015.
7. [Sauna use as a lifestyle practice to extend healthspan](https://pubmed.ncbi.nlm.nih.gov/34363927/). Experimental Gerontology, 2021.
8. [The Omega-3 Index: a new risk factor for death from coronary heart disease?](https://ohsu.elsevierpure.com/en/publications/the-omega-3-index-a-new-risk-factor-for-death-from-coronary-heart-2). Preventive Medicine, 2004.
9. [Role of coronary artery calcium score of zero and other negative risk markers for cardiovascular disease: the Multi-Ethnic Study of Atherosclerosis (MESA)](https://pmc.ncbi.nlm.nih.gov/articles/PMC4775391/). Circulation, 2016.
10. [Risk factors still matter for patients with zero CAC score: MESA (summary of Al Rifai, Blaha et al., Circulation 2022)](https://www.tctmd.com/news/risk-factors-still-matter-patients-zero-cac-score-mesa). TCTMD, 2022.
11. [How the Omega-3 Index guides EPA and DHA intake](https://www.foundmyfitness.com/episodes/how-the-omega-3-index-guides-epa-and-dha-intake). FoundMyFitness.
12. [Effect of salt substitution on cardiovascular events and death](https://doi.org/10.1056/NEJMoa2105675). New England Journal of Medicine, 2021.
13. [Effects of salt substitutes on clinical outcomes: a systematic review and meta-analysis](https://heart.bmj.com/content/108/20/1608). Heart, 2022.
14. [Association of smoking cessation with subsequent risk of cardiovascular disease](https://doi.org/10.1001/jama.2019.10298). JAMA, 2019.
15. [Life’s Essential 8: updating and enhancing the American Heart Association’s construct of cardiovascular health](https://pubmed.ncbi.nlm.nih.gov/35766027/). Circulation, 2022.
16. [DANCAVAS: food for thought as CV screening in older men misses mark](https://www.tctmd.com/news/dancavas-food-thought-cv-screening-older-men-misses-mark). TCTMD (summary of Lindholt et al., NEJM 2022), 2022.
17. [USPSTF updates recommendation on aspirin to prevent CVD](https://www.aafp.org/news/health-of-the-public/uspstf-aspirin-cvd.html). American Academy of Family Physicians, 2022.
18. [Emergency signs: when to call 9-1-1](https://www.heartandstroke.ca/heart-disease/emergency-signs/heart-attack-and-stroke). Heart & Stroke Foundation of Canada.
19. [Why this cardiologist recommends fasting, with Dr Pradip Jamnadas](https://drchatterjee.com/513). Feel Better, Live More podcast.