Cardiovascular disease is the leading cause of death worldwide, killing an estimated 19.8 million people in 2022 alone. That figure represents roughly 32% of all global deaths, making it a central focus of the World Health Organization’s public health efforts. The WHO tracks cardiovascular disease as a group of disorders affecting the heart and blood vessels, including coronary heart disease, stroke, and conditions like heart failure and peripheral artery disease.
What Counts as Cardiovascular Disease
The WHO uses “cardiovascular disease” as an umbrella term covering several conditions. The two biggest killers within the category are coronary heart disease (which causes heart attacks) and cerebrovascular disease (which causes strokes). In the United States, for example, about 1 in 6 cardiovascular deaths is specifically caused by stroke, with heart attacks and related coronary disease accounting for the largest share.
Other conditions grouped under the CVD umbrella include rheumatic heart disease (damage to the heart caused by rheumatic fever), congenital heart defects, deep vein thrombosis, and diseases of the arteries supplying the limbs and brain. While these are less common causes of death than heart attacks and strokes, the WHO tracks them all as part of the global cardiovascular burden.
Four Behavioral Risk Factors
The WHO identifies four behavioral risk factors that drive the majority of cardiovascular disease: unhealthy diet, physical inactivity, tobacco use, and harmful alcohol consumption. These behaviors don’t cause heart attacks or strokes overnight. Instead, they gradually produce measurable changes in the body: raised blood pressure, elevated blood sugar, high blood lipids (cholesterol and triglycerides), and excess weight. Those metabolic shifts are what directly damage blood vessels and strain the heart over years and decades.
Of these, high blood pressure is the single largest contributor to cardiovascular death globally. Salt intake plays a major role. The WHO recommends adults consume less than 2,000 mg of sodium per day, equivalent to just under a teaspoon of table salt. Most populations consume more than double that amount, which helps explain why hypertension is so widespread even in countries without high rates of obesity.
Why Low-Income Countries Are Hit Hardest
Cardiovascular disease is often thought of as a problem of wealthy nations with sedentary lifestyles and processed food, but the reality is the opposite. The vast majority of CVD deaths occur in low- and middle-income countries, where access to prevention, early detection, and treatment is limited. People in these settings are more likely to go undiagnosed for high blood pressure or diabetes, and less likely to receive timely care during a heart attack or stroke.
This inequality is a core concern for the WHO. More than half of all countries are projected to miss the 2030 targets set under the United Nations Sustainable Development Goals, which call for reducing premature death from noncommunicable diseases (including cardiovascular disease) by one third. Limited health budgets and fragmented primary care systems are the main barriers.
The WHO’s Prevention Strategy
The WHO promotes a two-track approach to reducing cardiovascular deaths: population-level policies that shift risk factors across entire societies, and individual-level clinical care for people already at high risk.
On the population side, the WHO maintains a list of “best buy” interventions, cost-effective policies proven to work even in countries with tight budgets. These include tobacco taxation, restrictions on salt in processed foods, bans on trans fats, and public education campaigns promoting physical activity. The logic is straightforward: if you reduce exposure to the four main behavioral risk factors across an entire population, cardiovascular death rates drop without requiring every person to visit a doctor.
On the clinical side, the WHO developed the HEARTS technical package, designed to help primary care systems in low-resource settings manage cardiovascular risk more effectively. The acronym stands for its six pillars: Healthy-lifestyle counselling, Evidence-based treatment protocols, Access to essential medicines and technology, Risk-based CVD management, Team-based care, and Systems for monitoring. The idea is to give frontline clinics a standardized playbook for identifying people with high blood pressure or elevated cardiovascular risk and getting them onto affordable treatment before a heart attack or stroke occurs.
Recognizing Heart Attacks and Strokes
A heart attack typically presents as pain or discomfort in the center of the chest, sometimes radiating to the arms, left shoulder, jaw, or back. Shortness of breath, nausea, and cold sweats are common. Women are somewhat more likely than men to experience atypical symptoms like unexplained fatigue, nausea, or back pain rather than the classic crushing chest pressure.
Stroke symptoms appear suddenly: weakness or numbness on one side of the face or body, confusion, difficulty speaking or understanding speech, trouble seeing, severe headache with no known cause, or loss of balance. Speed matters enormously with both conditions. The faster blood flow is restored to the heart or brain, the less permanent damage occurs.
What You Can Do to Lower Your Risk
The WHO’s recommendations for individuals are consistent and evidence-based. Keeping salt intake below a teaspoon a day, eating a diet rich in fruits, vegetables, and whole grains, staying physically active for at least 150 minutes per week, avoiding tobacco in any form, and limiting alcohol are the core protective behaviors. These are not minor lifestyle tweaks. Together, they address every one of the behavioral risk factors the WHO links to cardiovascular disease.
For people who already have elevated blood pressure, high cholesterol, or diabetes, medication combined with lifestyle changes significantly reduces the likelihood of a first heart attack or stroke. Risk-based management, where your overall 10-year cardiovascular risk is assessed rather than any single number in isolation, is the approach the WHO recommends for deciding when treatment should start. If you have a combination of moderately elevated risk factors, your overall risk may be higher than someone with just one factor that looks worse on paper.