Heart Disease | Heart and Vascular

Heart and Vascular

Heart Disease

Heart disease is the No. 1 cause of death in the world. Our team of experts can help you manage or prevent this disease so you can live a full, healthy life.

Medically reviewed by Gagan Singh, M.D. on Jan. 12, 2026.

Heart doctor listening to female patient’s heart to check for heart disease.

What Is Heart Disease?

Heart disease includes many different conditions that affect your heart. Some people are born with heart conditions (congenital heart disease). In other cases, you may develop heart disease later in life.

The most common type of heart disease in the U.S. is coronary artery disease (CAD). CAD happens when plaque builds up in your arteries and blocks blood flow to your heart. But there are dozens of other types of heart disease.

Whether you have heart disease or are trying to avoid it, the specialists at UC Davis Health can help. Our heart and vascular team guides you through science-backed methods of managing and preventing heart disease. Together, we help you find ways to optimize your heart health at every age and stage of life.

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Symptoms of Heart Disease

Symptoms of heart disease can be mild and hard to spot. That’s why seeing your health care provider regularly — even when you don’t notice symptoms — is important.

Common Symptoms

Symptoms of heart disease are different for each person and each type of heart disease. But if you notice any of these signs, contact your healthcare provider.

  • Fatigue or weakness without an obvious cause 
  • Fast heart rate or palpitations 
  • Lack of appetite 
  • Nausea or indigestion that doesn’t go away 
  • Numbness or weakness in your arms or legs  
  • Persistent cough  
  • Swelling in your feet, ankles, fingers or abdomen 

Emergency Symptoms

Seek emergency medical care if these symptoms arise. They could be a sign of cardiac arrest, a heart attack or another life-threatening heart problem.

  • Chest pain, especially pain that spreads to your arm or jaw 
  • Cold sweats or severe sweating 
  • Fainting 
  • Shortness of breath 
  • Sudden collapse 
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Causes of Heart Disease

Different types of heart disease have different causes. Sometimes there can be more than one cause. These are the most common causes of heart disease.

Atherosclerosis

Atherosclerosis is a buildup of plaque in your blood vessels and is the top cause of heart disease. The plaque partially or completely blocks blood flow to your heart, which can damage your heart or cause a heart attack.

Genetics

About 1% of people are born with a congenital heart defect, an abnormality caused by gene mutations (changes). Learn more about our care for adult congenital heart defects.

Infections

Certain infections, including pneumonia and urinary tract infections (UTIs), can cause a heart attack in some people. The heart attack tends to occur within three months of the infection.

Medications

Some medications can cause heart failure (when your heart can’t pump enough blood through your body). Other medications can cause an arrhythmia (abnormal heart rhythm).

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Risk Factors for Heart Disease

These factors make you more likely to develop heart disease. Our team works with you to reduce risk factors that are within your control.

Aging

As you age, your heart goes through changes that can cause scarring and structural heart disease. A heart disease prevention plan can help you keep your heart healthy throughout your life.

Diabetes

People with diabetes are twice as likely to develop heart disease than someone who doesn’t have diabetes. You’re also more likely to develop the condition at a younger age. 

Diet

Eating a diet high in saturated or trans fat can lead to coronary heart disease. Consuming too many processed, refined carbohydrates and salt may also increase your risk.

Heavy Alcohol Use

Regularly drinking large amounts of alcohol raises your risk of arrhythmias, heart attack, heart failure, stroke and death.

Hypertension (High Blood Pressure)

Over time, untreated hypertension makes your heart work harder to pump, leading to heart disease. Hypertension causes one-fourth of all heart failure cases.

Lack of Physical Activity

People who get less than 30 minutes of exercise three times per week have a greater risk of getting heart disease.

Obesity

Studies show that people with obesity are more likely to develop heart disease. Obesity also causes other heart disease risk factors, including type 2 diabetes and hypertension.

Sleep Apnea

If you have severe sleep apnea, you have a greater risk of coronary artery disease and congestive heart failure. Learn more about our care for sleep disorders.

Smoking

Smoking leads to one-fourth of heart disease deaths each year. Exposure to secondhand smoke also causes more than 33,000 heart disease deaths.

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Diagnosing Heart Disease

At UC Davis Health, our specialists provide the most advanced cardiac tests available. You have access to experts who have decades of experience diagnosing all types of heart disease.

An accurate diagnosis is the first step to managing heart disease. Our specialists carefully evaluate your symptoms and ask you about your personal and family health history. Based on this information, we may order tests to diagnose heart disease, such as:

Cardiac Catheterization

Interventional cardiologists insert a catheter (long, thin tube) into one of your artery or veins. We guide the catheter to your heart, where we can evaluate how your heart is working by looking at the heart arteries and measuring the pressures inside of your heart chambers. We use catheterization to perform many heart procedures that used to require major surgery.

Cardiac Imaging

A cardiac CT scan, MRI or echocardiogram takes detailed pictures of your heart’s structure. These tests can reveal congenital heart defects or structural heart disease.

Electrocardiogram (ECG)

This test records your heart’s electrical signals and can detect an arrhythmia.

Exercise Stress Test

This test measures your breathing, blood pressure and heart rate during exercise to identify arrhythmias, CAD and other types of heart disease.

Managing Heart Disease at UC Davis Health

Being diagnosed with heart disease can feel overwhelming, but you’re not alone. Our specialists are here to help you achieve the best possible heart health. We explain your options and you receive a personalized heart disease management plan that fits your life.

Complete Cardiology Care

Our cardiologists are knowledgeable of the latest evidence-based therapies for heart disease, including groundbreaking clinical trials. From medications to advanced procedures, we recommend treatments that boost your heart health and help you avoid complications.

Expert Nutrition Guidance

Changing your diet can seem challenging, but our team makes it easier. Our registered dietitians specialize in heart disease management and work with you to create an eating plan that matches your preferences.

Learn 7 things to eat and avoid for heart health
Lifestyle Changes

Exercising regularly, quitting smoking and managing stress are powerful ways to help your heart. They’re also difficult to do alone. That’s why our team creates a plan that helps you take steps each day toward a healthier heart. We support you through your challenges and victories.

Get this simple 8-week exercise plan for a healthy heart
Seamless Specialist Care

Managing heart disease often requires multiple specialists working together. Our team coordinates your care with other specialists, such as sleep medicine physicians and cardiac surgeons. We have every specialist you need to achieve optimal heart health now and for years to come.

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Preventing Heart Disease

Many cases of heart disease are preventable. And our team works tirelessly to help people of all ages prevent heart disease.

We partner with you to create a heart disease prevention plan that fits your life. Our experienced, compassionate cardiologists guide your care. You receive a personalized plan to optimize your heart health.

Our registered dietitians provide customized diet guidance, and our Bariatric Surgery Program helps people with obesity. We also coordinate your care with other specialists when needed, such as endocrinologists who specialize in diabetes. 

“What Is Atherosclerosis?” National Heart, Lung, and Blood Institute, https://www.nhlbi.nih.gov/health/atherosclerosis

“Hypertensive Heart Disease,” NIH, https://www.ncbi.nlm.nih.gov/books/NBK539800/

“Cardiovascular diseases,” World Health Organization, https://www.who.int/health-topics/cardiovascular-diseases#tab=tab_1 

“Diabetes and Your Heart,” Centers for Disease Control and Prevention, https://www.cdc.gov/diabetes/diabetes-complications/diabetes-and-your-heart.html 

Heart disease is the

#1 Cause of death in the world

One person dies from heart disease every

33Seconds in the U.S.

Who does it affect?

17.9MPeople die from heart disease each year

Sources: World Health Organization: Cardiovascular Diseases 

Centers for Disease Control and Prevention: Heart Disease Facts 

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