Cardiovascular disease (CV disease or CVD) is a group of disorders affecting the heart and blood vessels. It’s the leading cause of death worldwide, but more than half of all heart attacks and strokes are preventable by managing just five risk factors: weight, blood pressure, cholesterol, smoking, and diabetes.
What Counts as Cardiovascular Disease
CVD isn’t a single condition. It’s an umbrella term covering several related problems:
- Coronary heart disease: disease of the blood vessels that supply your heart muscle, commonly leading to heart attacks
- Cerebrovascular disease: disease of the blood vessels supplying the brain, which causes strokes
- Peripheral arterial disease: narrowed blood vessels in the arms and legs, often causing pain during walking
- Rheumatic heart disease: damage to the heart muscle and valves caused by rheumatic fever from strep bacteria
- Congenital heart disease: structural heart defects present from birth
- Deep vein thrombosis and pulmonary embolism: blood clots that form in leg veins and can travel to the heart or lungs
Coronary heart disease and stroke account for the vast majority of CVD deaths. The other conditions are less common but still fall under the same category.
How Plaque Builds Up in Your Arteries
The driving process behind most cardiovascular disease is atherosclerosis: a gradual buildup of plaque inside artery walls. Plaque is a sticky mix of fat, cholesterol, calcium, and other substances. Over years or decades, it makes artery walls thicker and stiffer, slowly narrowing the channel blood flows through. Less blood reaches your organs and tissues as a result.
The real danger comes when plaque ruptures. The constant force of blood flowing past can erode or crack a plaque deposit, triggering your body to form a blood clot at that spot. If the clot blocks blood flow to the heart, it causes a heart attack. If it blocks flow to the brain, it causes a stroke. This process often develops silently for years before producing any symptoms, which is why CVD can seem to strike suddenly even though the underlying damage has been building for a long time.
The Five Major Risk Factors
Research from Baylor College of Medicine found that five modifiable risk factors account for roughly 57% of women’s cardiovascular risk and about 53% of men’s. That means addressing these factors alone could prevent more than half of all heart attacks and strokes.
High Blood Pressure
Blood pressure is measured in two numbers (systolic over diastolic). The 2025 guidelines from the American Heart Association define four categories for adults: normal is below 120/80, elevated is 120 to 129 systolic with diastolic still under 80, stage 1 hypertension is 130 to 139 systolic or 80 to 89 diastolic, and stage 2 hypertension is 140/90 or higher. High blood pressure forces your heart to work harder and damages artery walls over time, accelerating plaque buildup.
High Cholesterol
Cholesterol travels through your blood in two main forms. LDL (“bad” cholesterol) deposits fat in artery walls, while HDL (“good” cholesterol) helps remove it. Optimal levels for a healthy adult, per the CDC: total cholesterol around 150 mg/dL, LDL around 100 mg/dL, HDL at least 40 mg/dL for men and 50 mg/dL for women, and triglycerides below 150 mg/dL. Your doctor can check these with a simple blood draw.
Smoking
Tobacco smoke damages the inner lining of blood vessels, making them more vulnerable to plaque. It also raises blood pressure and reduces the oxygen your blood can carry. Quitting at any age lowers cardiovascular risk, and the benefits begin within weeks.
Diabetes
Chronically high blood sugar damages blood vessels and the nerves that control the heart. People with diabetes are significantly more likely to develop coronary heart disease and stroke, especially if blood sugar is poorly controlled.
Excess Weight
Carrying extra weight, particularly around the midsection, increases blood pressure, raises LDL cholesterol, and makes diabetes more likely. Even modest weight loss (5 to 10% of body weight) can meaningfully improve these markers.
Warning Signs to Recognize
Many forms of CVD cause no symptoms until a serious event like a heart attack or stroke. Knowing the warning signs can save your life or someone else’s.
Classic heart attack symptoms include chest pain or pressure, shortness of breath, and pain radiating to the arm, neck, or jaw. But women often experience it differently. Their symptoms tend to be vaguer: unusual fatigue, nausea or vomiting, dizziness, back or jaw pain, and shortness of breath. Chest discomfort, when present, may not be severe or even the most noticeable symptom. These symptoms in women can occur while resting or even during sleep, making them easier to dismiss.
For stroke, the FAST method helps with rapid identification: Face drooping on one side, Arm weakness (ask the person to raise both arms), Speech difficulty or slurring, and Time to call emergency services immediately. Some medical groups have expanded this to BE-FAST, adding Balance problems and Eye symptoms like sudden vision loss, which catches strokes that the original checklist misses.
How Cardiovascular Disease Is Diagnosed
If your doctor suspects CVD, several tests can confirm what’s happening and how severe it is. The process usually starts simple and gets more detailed as needed.
Blood tests check for proteins that leak from damaged heart muscle after a heart attack, markers of artery inflammation, and your cholesterol and blood sugar levels. An electrocardiogram (ECG) is a quick, painless recording of your heart’s electrical signals that shows whether it’s beating too fast, too slow, or irregularly. A chest X-ray can reveal whether the heart is enlarged and check the condition of the lungs.
An echocardiogram uses sound waves to create moving images of your heart, showing how blood flows through the chambers and valves. It can detect valves that are narrowed or leaking. Stress tests have you walk on a treadmill or ride a stationary bike while your heart is monitored, revealing how it responds to physical effort and whether symptoms appear during exercise. If you can’t exercise, medication can simulate the effect.
For a closer look, cardiac catheterization involves threading a thin, flexible tube through a blood vessel in the wrist or groin up to the heart. Dye is injected so blockages show up clearly on X-ray images. A cardiac MRI provides highly detailed images of the heart’s structure without any radiation. Holter monitoring, where you wear a portable ECG device for a day or more, catches irregular heart rhythms that don’t show up during a brief office visit.
Reducing Your Risk
Because the five major risk factors account for more than half of all cardiovascular events, lifestyle changes offer substantial protection. The CDC recommends 150 minutes of moderate-intensity aerobic activity per week, like brisk walking for 30 minutes five days a week. Alternatively, 75 minutes of vigorous activity such as jogging achieves the same benefit. You can also mix the two.
A diet lower in sodium, saturated fat, and processed foods while emphasizing vegetables, fruits, whole grains, and lean protein helps control both blood pressure and cholesterol. For people who smoke, quitting is the single most impactful change. Managing stress and getting adequate sleep also contribute, since chronic stress raises blood pressure and promotes inflammation in blood vessels.
For those who already have elevated blood pressure, high cholesterol, or diabetes, working with a healthcare provider to manage these conditions with medication when needed can dramatically lower the chance of a heart attack or stroke. The key insight is that CVD develops slowly over decades, which means there’s a wide window to intervene before a serious event occurs.