Heart Disease in the USA: Causes, Symptoms & Prevention Guide
Updated: Sep 23
Written by Dr. Charles Drew, Lead Pharmaceutical Content Specialist & Clinical Drug Information Reviewer
Reviewed for medical accuracy under the Ivermectinkart Editorial Policy
Introduction
Heart disease in the USA remains a major public-health concern and was the country’s leading cause of death in the latest final 2024 mortality data. The term “heart disease” covers several conditions affecting the heart, with coronary heart disease being the most common type. Some heart problems develop quietly for years, while others eventually cause chest discomfort, shortness of breath, fatigue, or a heart attack. Factors such as high blood pressure, unhealthy cholesterol levels, smoking, diabetes, physical inactivity, and family history can influence risk. The encouraging part is that many important risk factors can be improved through lifestyle changes and appropriate medical care. This guide explains the causes, symptoms, risk factors, warning signs, and practical prevention strategies adults should understand.
How Common Is Heart Disease in the USA?
Heart disease places a substantial health burden on American adults. According to final CDC mortality data, 683,491 people in the United States died from heart disease in 2024, representing 22.2% of all deaths that year. Heart disease remained the country’s leading cause of death.
The age-adjusted heart disease death rate nevertheless declined from 162.1 deaths per 100,000 people in 2023 to 157.6 per 100,000 in 2024.
The term itself is broader than coronary artery disease. Heart disease can include conditions involving the heart muscle, valves, rhythm, and blood vessels. Coronary heart disease—also called coronary artery disease or ischemic heart disease—is the most common type.
The CDC's latest U.S. heart disease mortality statistics provide national data on the burden of cardiovascular disease and coronary heart disease.
Heart disease does not always announce itself with obvious symptoms. Coronary heart disease can remain “silent” until a serious complication occurs, making prevention, risk-factor management, and appropriate health checks important even when you feel well.
What Causes Heart Disease?
Heart disease has multiple causes, and the exact mechanism depends on the condition. In coronary heart disease, the leading cause is plaque buildup in the coronary arteries—the blood vessels that supply the heart muscle with oxygen-rich blood.
How plaque develops in the arteries
Plaque is made from substances including fat, cholesterol, and calcium. Its accumulation in an artery is called atherosclerosis.
Over time, plaque can make coronary arteries harder and narrower, reducing blood flow to the heart. A blood clot can also form and suddenly block blood flow, potentially causing a heart attack.
Coronary heart disease is not always caused by a large blocked artery. Problems involving the heart's smaller blood vessels or the way coronary blood vessels respond when the heart requires more oxygen can also contribute.
What increases the risk?
The CDC identifies high blood pressure, high cholesterol, and smoking as key heart disease risk factors. Diabetes, obesity, unhealthy eating patterns, insufficient physical activity, and excessive alcohol consumption can also contribute.
Other factors cannot simply be changed. These include increasing age and family history. Risk reflects the combination and severity of factors rather than one characteristic alone.
Major heart disease risk factors and what you can do about them
Risk Factor | Why It Matters | Can It Be Modified? |
High blood pressure | Can damage blood vessels and increase cardiovascular strain | Often, through lifestyle changes and/or medication |
Unhealthy cholesterol levels | Can contribute to plaque buildup | Often |
Smoking | Damages the cardiovascular system and increases heart disease risk | Yes |
Diabetes | High blood sugar can damage blood vessels over time | Risk can be managed |
Physical inactivity | Contributes to cardiovascular and metabolic risk | Yes |
Obesity | Is associated with high blood pressure, abnormal lipids and diabetes | Often |
Unhealthy diet | Can contribute to blood pressure, cholesterol and metabolic risk | Yes |
Age | Cardiovascular risk generally increases with age | No |
Family history | Some inherited factors can increase susceptibility | No |
What Are the Common Symptoms of Heart Disease?
Heart disease symptoms vary according to the specific condition, and some people have no obvious symptoms before a serious event. With coronary heart disease, chest discomfort and shortness of breath are important symptoms, but symptoms are not identical in every person.
Chest discomfort or angina
Angina is chest discomfort caused by insufficient oxygen-rich blood reaching part of the heart muscle. People may describe the sensation as pressure, squeezing, heaviness, tightness, or burning rather than simply “pain.”
Symptoms may appear when the heart needs more oxygen, such as during physical activity. Their pattern and severity can vary.
Chest discomfort should not automatically be assumed to be indigestion or another harmless problem, particularly when it is new, unexplained, severe, or accompanied by other concerning symptoms.
Shortness of breath and other symptoms
Reduced blood flow or impaired heart function can produce symptoms beyond chest discomfort. Depending on the underlying condition, a person may experience shortness of breath, unusual tiredness, dizziness, weakness, or other symptoms.
Symptoms also do not reliably indicate how much coronary artery disease is present. NHLBI notes that coronary heart disease can be silent until complications such as a heart attack or cardiac arrest occur.
How Do You Know If Symptoms Could Be a Heart Attack?
A heart attack can occur when blood flow to part of the heart muscle becomes blocked. Warning symptoms should be taken seriously because rapid treatment can limit heart damage and save lives.
Possible symptoms can include chest discomfort, shortness of breath, and discomfort involving other parts of the upper body. Symptoms can differ between individuals, and not every heart attack begins with dramatic chest pain.
If you are uncertain whether chest pain could be a heart attack, the NHLBI guidance on coronary heart disease symptoms advises calling 911 rather than attempting to diagnose the cause yourself.
In the United States, call 911 immediately for symptoms suggesting a heart attack or another cardiovascular emergency. Do not drive yourself to the hospital when emergency medical assistance is available.
How Can You Lower Your Risk of Heart Disease?
Heart disease prevention focuses on improving the factors you can control while identifying and managing medical risk factors. Healthy eating, regular physical activity, avoiding tobacco, maintaining healthy sleep habits, and controlling blood pressure, cholesterol, and blood sugar all contribute to cardiovascular health.
Choose a heart-supportive eating pattern
Rather than concentrating on a single “heart-healthy” food, consider your overall eating pattern.
The CDC recommends plenty of fruits and vegetables and fewer processed foods. Limiting saturated and trans fats can support healthier cholesterol levels, while reducing excess sodium can help with blood-pressure control.
Practical choices can include:
Eating more vegetables and fruits
Choosing whole grains more often
Including beans, nuts and other nutrient-dense foods
Choosing appropriate lean protein sources
Limiting highly processed foods
Reducing foods high in saturated and trans fats
Limiting excess sodium and added sugars
Get regular physical activity
Physical activity benefits cardiovascular health directly and can also help with weight, blood pressure, cholesterol, and blood-sugar management.
The American Heart Association recommends that adults aim for at least 150 minutes of moderate-intensity physical activity or 75 minutes of vigorous activity each week.
If you have cardiovascular disease, significant symptoms, or medical limitations, discuss an appropriate activity plan with your healthcare professional rather than suddenly beginning strenuous exercise.
Avoid tobacco
Smoking is a major modifiable heart disease risk factor. If you currently smoke, getting professional support to quit can be an important cardiovascular-health intervention.
The benefits of prevention also extend beyond any one lifestyle habit. The CDC's heart disease prevention guidance emphasizes both healthy behaviors and management of conditions such as high blood pressure, high cholesterol, and diabetes.
Everyday dos and don'ts for reducing heart disease risk
Do | Don't |
Know your blood pressure and discuss abnormal readings with your healthcare professional | Assume high blood pressure will always cause noticeable symptoms |
Follow a balanced eating pattern rich in vegetables, fruits and other minimally processed foods | Rely heavily on foods high in sodium, saturated fat or trans fat |
Build regular physical activity into your week | Stay sedentary for long periods whenever movement is practical |
Seek support to stop smoking | Assume reducing smoking provides the same protection as quitting |
Discuss cholesterol and blood-sugar screening with your healthcare professional | Ignore abnormal results because you feel healthy |
Take prescribed cardiovascular medicines as directed | Stop or change prescription medicines without medical advice |
Why Do Blood Pressure, Cholesterol and Diabetes Matter?
High blood pressure, unhealthy cholesterol levels, and diabetes can contribute to cardiovascular damage long before symptoms develop. Identifying and appropriately managing these conditions is therefore an important part of heart disease prevention.
Blood pressure
High blood pressure means blood is pushing against artery walls with excessive force over time. When uncontrolled, it can affect the heart and other organs, including the kidneys and brain.
Because high blood pressure often does not produce obvious warning symptoms, measurements during routine healthcare visits can identify a problem that would otherwise be missed.
Cholesterol
Cholesterol itself is necessary for normal body functions, but unhealthy blood lipid levels can contribute to atherosclerosis and coronary heart disease.
Your healthcare professional can interpret cholesterol results in the context of age, blood pressure, diabetes, smoking, family history, and other cardiovascular risk factors rather than looking at one number in isolation.
Diabetes and blood sugar
Diabetes increases heart disease risk, partly because elevated blood sugar can damage blood vessels over time.
Managing diabetes therefore involves more than blood-sugar control alone. Blood pressure, cholesterol, smoking status, physical activity, nutrition, and appropriate medication can all form part of cardiovascular risk management.
When Should You Seek Medical Care?
Seek emergency medical assistance for new or severe chest pressure, squeezing or pain—particularly when it occurs with shortness of breath, faintness, sweating, nausea, or other concerning symptoms. In the United States, call 911 when a heart attack is suspected.
Routine medical care is also important before an emergency develops. Consider discussing cardiovascular risk with a healthcare professional if you have high blood pressure, high cholesterol, diabetes, a smoking history, obesity, a strong family history of premature heart disease, or other cardiovascular concerns.
Preventive care may involve checking blood pressure, cholesterol, blood sugar, smoking status, lifestyle habits, family history, and overall cardiovascular risk. What tests or treatments are appropriate depends on your age, medical history, existing conditions, and individual risk.
Conclusion
Heart disease in the USA remains a leading health concern, but many of its major risk factors can be addressed. Protecting cardiovascular health involves avoiding tobacco, staying physically active, choosing a heart-supportive diet, and appropriately managing blood pressure, cholesterol, diabetes, and other medical conditions. Regular healthcare visits can also uncover risks before symptoms appear.
Do not use this guide to diagnose chest pain or adjust cardiovascular medication yourself. New or severe symptoms suggesting a heart attack require emergency medical care—call 911 in the United States. For prevention, discuss your individual cardiovascular risk and appropriate screening with a qualified healthcare professional.
Frequently Asked Questions
1. What is the leading cause of heart disease in the USA?
For coronary heart disease, the leading cause is plaque buildup in the coronary arteries, known as atherosclerosis. Plaque gradually narrows arteries and reduces blood flow. High blood pressure, unhealthy cholesterol, smoking, diabetes, and other factors can increase cardiovascular risk.
2. What are the first warning signs of heart disease?
There may be no early warning signs. Coronary heart disease can remain silent until symptoms or a complication develops. When symptoms occur, chest discomfort and shortness of breath are important possibilities that warrant appropriate medical evaluation.
3. Can heart disease be prevented?
Many cases of coronary heart disease can be prevented or delayed by addressing modifiable risk factors. Avoiding smoking, eating well, exercising regularly, and appropriately managing blood pressure, cholesterol, and diabetes can reduce risk. Individual prevention needs vary.
4. At what age should I start thinking about heart disease prevention?
Heart-healthy habits are valuable throughout life rather than only after middle age. Cardiovascular risk factors can begin developing early, and NHLBI emphasizes starting prevention early. Your healthcare professional can advise when blood pressure, cholesterol, diabetes, and cardiovascular-risk assessments are appropriate.
5. Can you have heart disease without chest pain?
Yes. Coronary heart disease can exist without noticeable symptoms, and not everyone experiences the same warning signs. Some people only discover the condition after a serious complication. Preventive checkups and risk-factor assessment remain important even when you feel well.
6. What lifestyle changes are best for preventing heart disease?
Focus on several habits rather than one quick fix: avoid tobacco, eat a nutrient-rich diet, stay physically active, get adequate sleep, and manage weight and cardiovascular risk factors. Blood pressure, cholesterol, and blood sugar also need appropriate monitoring and treatment.
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