CVD stands for cardiovascular disease, a broad term covering any condition that affects the heart or blood vessels. It’s the leading cause of death worldwide, responsible for an estimated 19.2 million deaths in 2023 alone. The term doesn’t refer to a single illness but to a group of related conditions, some of which develop slowly over decades and others that strike suddenly.
Conditions That Fall Under CVD
When doctors or health organizations use the abbreviation CVD, they’re referring to a collection of disorders that includes:
- Coronary heart disease: narrowing or blockage of the blood vessels that supply the heart muscle, which can lead to chest pain or heart attacks
- Cerebrovascular disease: problems with the blood vessels feeding the brain, including stroke
- Peripheral arterial disease: reduced blood flow to the arms and legs due to narrowed arteries
- Rheumatic heart disease: damage to the heart valves caused by rheumatic fever, a complication of strep infections
- 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 lungs
Coronary heart disease and stroke account for the majority of CVD deaths. Globally, roughly 626 million people were living with some form of cardiovascular disease in 2023.
How CVD Develops in the Body
Most CVD traces back to a process called atherosclerosis, the gradual buildup of fatty deposits inside artery walls. It starts when cholesterol particles (specifically LDL, the “bad” cholesterol) seep into the inner lining of an artery and get trapped there. Once stuck, these particles undergo chemical changes that trigger an immune response. The body sends white blood cells to clean up the fatty buildup, but over time those cells become overwhelmed, swelling with absorbed fat and dying in place.
This creates a growing mass of dead cells and fat, known as plaque, sitting inside the artery wall. The artery narrows, blood flow decreases, and the plaque can become unstable. If it ruptures, a blood clot forms at the site. That clot can block the artery entirely, cutting off blood supply to the heart (heart attack) or brain (stroke). The whole process typically unfolds over years or even decades before symptoms appear, which is why many people don’t know they have CVD until something acute happens.
Major Risk Factors
Most of the factors that drive CVD are things you can change. High blood pressure tops the list. It forces the heart to work harder and damages artery walls over time, making them more vulnerable to plaque buildup. Normal blood pressure is below 120/80 mm Hg. Readings of 130/80 or higher now qualify as hypertension under current guidelines, and the treatment goal for most adults is to stay below 130/80.
High LDL cholesterol directly feeds the plaque-building process described above. Diabetes roughly doubles the risk of dying from heart disease. Obesity raises LDL cholesterol, increases blood pressure, and promotes diabetes, compounding the danger. Smoking damages blood vessels directly: nicotine raises blood pressure while carbon monoxide in cigarette smoke reduces the oxygen your blood can carry.
Physical inactivity, heavy alcohol use, and a diet high in saturated fat and sodium all contribute as well. These risk factors rarely exist in isolation. Someone who is sedentary is more likely to develop high blood pressure, high cholesterol, obesity, and diabetes, each of which amplifies the others.
What Happens When CVD Goes Unmanaged
Because atherosclerosis progresses silently, CVD often isn’t diagnosed until a serious event occurs. A first heart attack, a stroke, or sudden chest pain may be the initial sign. Over time, reduced blood flow weakens the heart muscle. One of the most common long-term complications is heart failure, a condition where the heart can no longer pump enough blood to meet the body’s needs. This leads to fatigue, fluid retention, and shortness of breath that progressively limits daily activity.
Reduced blood flow also damages organs beyond the heart. The kidneys, which depend on steady blood supply to filter waste, can decline in function. Poor circulation to the legs causes pain during walking and, in severe cases, tissue damage. When blood flow to the brain is chronically reduced, it can contribute to cognitive decline.
Lowering Your Risk
The most effective prevention targets the same risk factors that cause CVD. Current recommendations call for at least 150 minutes of moderate-intensity exercise per week, roughly 30 minutes of brisk walking or cycling five days a week. That amount meaningfully lowers blood pressure, improves cholesterol balance, and helps maintain a healthy weight.
On the dietary side, reducing saturated fat, trans fat, and sodium intake slows plaque development. Replacing processed foods with vegetables, fruits, whole grains, and lean proteins shifts cholesterol levels in a protective direction. For alcohol, staying within one drink per day for women and two for men keeps the cardiovascular risk from drinking in check.
Quitting smoking produces rapid benefits. Blood pressure and heart rate begin to drop within hours, and the excess risk of heart disease falls significantly within a few years. For people who already have elevated blood pressure or cholesterol, lifestyle changes are typically the first step, with medication added if numbers don’t reach target levels after three to six months.