Cardiovascular disease (CVD) is an umbrella term for a group of conditions that affect the heart, blood vessels, or both. It is not a single illness. The category includes coronary artery disease, stroke, peripheral artery disease, heart failure, and several other conditions involving impaired blood flow or heart function. Together, these diseases killed an estimated 19.8 million people in 2022, accounting for roughly 32% of all deaths worldwide.
Coronary Artery Disease
Coronary artery disease is the most common form of cardiovascular disease. It develops when fatty deposits called plaques build up inside the arteries that supply blood to your heart muscle. Over time, these plaques narrow the arteries, reducing blood flow. What shows up on a standard imaging scan is often described as the “tip of the iceberg,” because plaque buildup is typically far more widespread than any single blockage suggests.
The danger isn’t just the narrowing itself. Plaques can rupture, triggering a blood clot that suddenly blocks the artery. That’s a heart attack. Before things reach that point, reduced blood flow often causes chest pain or pressure during physical activity, a symptom called angina. Some people feel it as tightness, squeezing, or heaviness in the chest that eases with rest. Others have no symptoms at all until a heart attack occurs.
Stroke and Cerebrovascular Disease
Stroke is essentially the brain’s version of a heart attack. It happens when blood flow to part of the brain is cut off, killing brain cells within minutes. There are two main types. Ischemic stroke, the more common one, occurs when a blood clot blocks an artery in the brain. That clot can form locally (thrombotic stroke) or travel from elsewhere in the body, often the heart (embolic stroke).
Hemorrhagic stroke is less common but often more severe. It occurs when a blood vessel in the brain ruptures and bleeds into surrounding tissue. Both types share the same underlying risk factors as other cardiovascular diseases: high blood pressure, high cholesterol, smoking, and diabetes. Recognizing stroke symptoms quickly (sudden numbness, confusion, trouble speaking, vision changes, or severe headache) is critical because treatment within the first few hours dramatically improves outcomes.
Peripheral Artery Disease
Peripheral artery disease (PAD) is the same plaque-buildup process that causes coronary artery disease, but it affects arteries outside the heart, most often in the legs. Your legs don’t get enough blood to meet demand, especially during movement. The hallmark symptom is leg pain or cramping while walking that goes away when you stop, a pattern called claudication. It commonly strikes the calves, thighs, or hips.
PAD can be mild or produce no symptoms at all, which makes it easy to dismiss. But it’s a red flag for widespread artery disease. Other signs to watch for include shiny skin on the legs, slow-growing toenails, skin color changes, sores on the feet or toes that won’t heal, and erectile dysfunction. In severe cases, pain occurs even at rest or wakes you from sleep.
Heart Failure
Heart failure doesn’t mean the heart has stopped. It means the heart can no longer pump blood efficiently enough to meet the body’s needs. This can happen in two distinct ways. In one form, the heart muscle weakens and can’t contract forcefully enough. In the other, the heart muscle stiffens and can’t relax properly to fill with blood between beats, even though its pumping strength is technically normal.
The practical experience is similar for both: shortness of breath (especially during activity or while lying flat), fatigue, and swelling in the legs, ankles, or abdomen from fluid buildup. Heart failure usually develops gradually, often as a consequence of other cardiovascular conditions. Years of high blood pressure, a previous heart attack, or damaged heart valves can all lead to it. It’s a chronic condition, but treatments can significantly improve symptoms and slow progression.
Other Conditions Under the CVD Umbrella
Several additional conditions qualify as cardiovascular disease:
- Heart valve disease occurs when one or more of the heart’s four valves don’t open or close properly, disrupting blood flow through the heart chambers.
- Arrhythmias are irregular heartbeats. The heart may beat too fast, too slow, or with an erratic rhythm. Atrial fibrillation, which raises stroke risk, is the most common type.
- Aortic disease involves the body’s largest artery. The aorta can weaken and bulge (aneurysm) or tear (dissection), both of which are medical emergencies.
- Congenital heart defects are structural heart problems present from birth, such as holes between heart chambers or malformed valves.
Shared Risk Factors
Most forms of cardiovascular disease share a common set of risk factors, and the biggest ones are measurable. High blood pressure is the single largest contributor. The American Heart Association classifies blood pressure as normal below 120/80 mm Hg, elevated at 120 to 129 over less than 80, and stage 1 hypertension at 130 to 139 over 80 to 89. Stage 2 hypertension starts at 140/90 or higher. Each step up increases damage to artery walls over time.
High cholesterol is the other major measurable risk. Optimal total cholesterol is around 150 mg/dL, with LDL (“bad”) cholesterol around 100 mg/dL. A total cholesterol above 200 mg/dL is generally considered high for both adults and children. LDL cholesterol is the type that drives plaque buildup in arteries, so it gets the most clinical attention.
Beyond those numbers, smoking, diabetes, obesity, physical inactivity, and a diet high in processed foods all raise risk. A family history of heart disease matters too, particularly if a close relative developed it at a young age. Most people with cardiovascular disease have multiple overlapping risk factors rather than a single cause.
Screening and Early Detection
Cardiovascular disease often develops silently for years before symptoms appear, which is why routine screening matters. The American Heart Association recommends cholesterol screening starting at age 20, repeated every four to six years for people at normal risk. If your risk is elevated, more frequent testing is appropriate. Blood pressure should be checked at least once a year if your readings are below 120/80, and more often if they’re higher.
These screenings are simple blood draws and a pressure cuff, but they catch the two biggest controllable risk factors early. Catching high cholesterol or high blood pressure in your 20s or 30s gives you decades to manage them before they cause structural damage to your heart or arteries. By the time symptoms like chest pain, leg cramping, or shortness of breath show up, the disease has typically been progressing for years.