The four most common cardiovascular diseases are coronary artery disease, stroke, hypertensive heart disease, and peripheral artery disease. Together, cardiovascular diseases kill more people worldwide than any other cause. In the United States alone, 919,032 people died from cardiovascular disease in 2023, roughly 1 in every 3 deaths. These four conditions share overlapping risk factors, and understanding each one can help you recognize warning signs early.
Coronary Artery Disease
Coronary artery disease (CAD) is the single deadliest cardiovascular disease in the world, responsible for about 43% of all cardiovascular deaths. It accounts for roughly 8.9 million deaths per year globally. In the U.S., coronary heart disease killed 371,506 people in 2022.
CAD develops when fatty deposits called plaque build up inside the arteries that supply blood to your heart muscle. Over time, this buildup narrows those arteries and restricts blood flow. The process, called atherosclerosis, often develops over decades without symptoms. Many people don’t know they have it until they experience chest pain (angina) or a heart attack, which happens when a plaque ruptures and a blood clot completely blocks an artery.
The warning signs of a heart attack include chest pressure or pain, discomfort radiating to the arms, back, neck, or jaw, shortness of breath, cold sweats, nausea, and lightheadedness. These symptoms can appear suddenly or build gradually. Women are more likely than men to experience the less obvious symptoms like nausea and back pain rather than classic chest pain.
Stroke
Stroke is the third leading cause of death and disability worldwide. In 2021, an estimated 93.8 million people were living with the effects of stroke, and 11.9 million new cases occurred that year alone. The lifetime risk of stroke has increased by 50% over the past two decades. Today, roughly 1 in 4 adults will experience a stroke in their lifetime.
There are two main types. Ischemic stroke, the more common form, happens when a blood clot blocks a vessel supplying your brain. Hemorrhagic stroke occurs when a blood vessel in the brain ruptures and bleeds into surrounding tissue. A transient ischemic attack (sometimes called a “mini-stroke”) produces stroke-like symptoms that resolve within minutes to hours, but it signals a serious risk of a full stroke later.
Recognizing a stroke quickly is critical because treatment is most effective within the first few hours. The American Heart Association uses the acronym F.A.S.T.: Face drooping (one side of the face looks uneven or numb), Arm weakness (one arm drifts downward when both are raised), Speech difficulty (slurred or garbled words), and Time to call 911. Even if symptoms disappear on their own, they still require emergency evaluation.
Hypertensive Heart Disease
High blood pressure, or hypertension, affects an estimated 1.4 billion adults aged 30 to 79 worldwide. That’s 33% of the global population in that age range. When sustained over years, high blood pressure forces the heart to work harder than normal, eventually thickening the heart muscle and damaging blood vessels. This leads to hypertensive heart disease, a category that includes heart failure, enlarged heart, and other structural changes caused by chronically elevated pressure.
Hypertension is often called a “silent” condition because it rarely produces noticeable symptoms until damage has already occurred. It is also the single largest contributor to cardiovascular events across all regions of the world. A major global analysis found that elevated systolic blood pressure was the biggest driver of new cardiovascular disease cases, ahead of smoking, high cholesterol, diabetes, and obesity. Across five modifiable risk factors combined, about 55% of all new cardiovascular events in both men and women were attributable to factors that can be changed.
Current guidelines from the American Heart Association and American College of Cardiology define normal blood pressure as below 120/80 mmHg. Readings of 120 to 129 systolic with less than 80 diastolic are considered elevated. Stage 1 hypertension begins at 130/80 mmHg. Uncontrolled hypertension doesn’t just damage the heart. It can burst or block arteries supplying the brain (causing stroke) and damage the kidneys, potentially leading to kidney failure.
Peripheral Artery Disease
Peripheral artery disease (PAD) affects the blood vessels outside the heart and brain, most commonly in the legs. In 2021, approximately 113.7 million people worldwide were living with PAD. Like coronary artery disease, it’s caused by atherosclerosis, but in this case the plaque builds up in the arteries of your limbs rather than those feeding the heart.
The hallmark symptom is claudication: pain, cramping, or heaviness in your legs when you walk or climb stairs that goes away with rest. As the disease progresses, pain can occur even at rest, and wounds on the feet or legs may heal very slowly or not at all. In severe cases, reduced blood flow can lead to tissue death and amputation. Many people with PAD, however, have no symptoms at all, which is why it frequently goes undiagnosed.
Doctors screen for PAD using the ankle-brachial index, a simple test that compares blood pressure measured at your ankle to blood pressure in your arm. A ratio of 0.90 or lower suggests narrowed arteries in the legs. PAD is also an important warning sign for broader cardiovascular risk, because the same plaque buildup is likely occurring in arteries elsewhere in the body. People diagnosed with PAD face a significantly higher risk of heart attack and stroke.
Shared Risk Factors
These four conditions are driven by the same core risk factors: high blood pressure, high cholesterol, smoking, diabetes, and excess body weight. A large global study found that these five modifiable factors together account for roughly 57% of new cardiovascular events in women and 53% in men. That means more than half of all heart disease and stroke cases worldwide are linked to conditions people can influence through lifestyle changes or treatment.
Physical inactivity, poor diet, and excessive alcohol use compound the risk. Smoking damages the lining of blood vessels and accelerates plaque formation. Diabetes raises blood sugar levels that, over time, injure artery walls. High cholesterol contributes the raw material for plaque. And elevated blood pressure applies constant mechanical stress to vessel walls, making them stiffer and more prone to damage. These factors rarely act alone. Most people with cardiovascular disease have two or more working together, which is why even modest improvements in blood pressure, cholesterol, or physical activity can meaningfully reduce overall risk.