How Diabetes Can Increase Your Risk of Heart Disease

Diabetes affects more than blood sugar levels. Over time, it can damage blood vessels, affect circulation, and increase the risk of serious cardiovascular conditions, including heart disease, heart attacks, and strokes. While managing blood glucose is an essential part of diabetes care, protecting your heart is equally important. High blood pressure, unhealthy cholesterol levels, kidney disease, and other conditions can further increase cardiovascular risk. Whether you’ve recently been diagnosed with diabetes or have been living with it for years, understanding the connection between diabetes and heart disease can help you take steps to protect your long-term health. For residents of Phoenix, Mesa, Scottsdale, Chandler, and other Arizona communities, regular medical checkups, healthy lifestyle habits, and appropriate treatment can help manage cardiovascular risk. In this guide, we’ll explain how diabetes affects the heart and blood vessels, which warning signs to recognize, and what you can do to reduce your risk of heart disease.

 

The Connection Between Diabetes and Heart Disease

Diabetes is a chronic condition that affects how the body processes glucose, also known as blood sugar. Insulin, a hormone produced by the pancreas, helps glucose move from the bloodstream into cells, where it can be used for energy. When the body doesn’t produce enough insulin or cannot use it effectively, blood glucose levels can become elevated. Over time, high blood glucose can damage blood vessels and contribute to the development of cardiovascular disease. According to the Centers for Disease Control and Prevention (CDC), adults with diabetes are about twice as likely to develop heart disease or experience a stroke as adults without diabetes. Heart disease includes several conditions affecting the heart and blood vessels. One of the most common is coronary artery disease, which develops when plaque builds up inside the arteries that supply blood to the heart. This buildup narrows the arteries and restricts blood flow, potentially leading to a heart attack.

Diabetes can also occur alongside other conditions that increase cardiovascular risk, including:

• High blood pressure
• Unhealthy cholesterol levels
• Excess body weight
• Chronic kidney disease
• Physical inactivity

 

When several of these risk factors occur together, the likelihood of cardiovascular complications can increase significantly.

 

How Does Diabetes Damage the Heart and Blood Vessels?

Diabetes can affect the cardiovascular system in several ways. Understanding these effects explains why managing blood sugar is important but isn’t the only part of protecting your heart.

 

High Blood Sugar Can Damage Blood Vessels

Persistently elevated blood glucose can damage the lining of blood vessels and contribute to atherosclerosis, a condition in which plaque builds up inside arteries. As plaque accumulates, arteries can become narrower and less flexible. If a blood clot blocks blood flow to the heart, it can cause a heart attack. If blood flow to part of the brain is interrupted, a stroke can occur. Keeping blood glucose within your individualized target range helps reduce the risk of diabetes-related complications. However, blood sugar management alone cannot eliminate the risk of heart disease.

 

Diabetes Can Increase the Risk of High Blood Pressure

High blood pressure, also known as hypertension, is common among people with diabetes. It places additional strain on the heart and damages blood vessels over time. When diabetes and hypertension occur together, the risk of heart attack, stroke, kidney disease, and heart failure increases. High blood pressure often causes no noticeable symptoms, making regular monitoring important even when you feel well. Your healthcare provider can help determine your blood pressure target and recommend appropriate lifestyle changes or medication when needed.

 

Diabetes Can Affect Cholesterol Levels

People with diabetes are more likely to develop an unhealthy cholesterol profile, including elevated triglycerides, higher levels of LDL cholesterol, or lower levels of HDL cholesterol.

• LDL cholesterol: Often called “bad” cholesterol, it contributes to plaque buildup in
• HDL cholesterol: Often called “good” cholesterol, it helps transport cholesterol away from tissues for processing.
• Triglycerides: A type of fat in the blood that can contribute to cardiovascular risk when elevated.

 

Even if your total cholesterol appears acceptable, your overall cardiovascular risk may still be elevated because of diabetes and other health factors. Your doctor may recommend a lipid panel to assess your cholesterol and triglyceride levels and determine whether lifestyle changes or medication could help.

 

Diabetes Can Affect Kidney Health

The kidneys help remove waste from the blood and regulate fluid balance and blood pressure. Diabetes can damage the small blood vessels in the kidneys, leading to chronic kidney disease. Kidney disease and cardiovascular disease share several risk factors, and each condition can make managing the other more difficult. Depending on your medical history, your healthcare provider may recommend blood and urine tests to assess kidney function and look for early signs of damage.

 

Diabetes Can Increase the Risk of Heart Failure

Heart failure occurs when the heart cannot pump blood effectively enough to meet the body’s needs. It does not mean the heart has stopped beating. People with diabetes have an increased risk of heart failure because of factors such as coronary artery disease, high blood pressure, kidney disease, and changes in heart muscle function. Possible symptoms include:

• Shortness of breath during everyday activities or while lying down
• Unusual fatigue or weakness
• Swelling in the legs, ankles, or feet
• Rapid or unexplained weight gain from fluid buildup
• Persistent coughing or difficulty breathing when lying down

 

Contact a healthcare professional promptly if you develop new or worsening symptoms. Severe or sudden breathing difficulties require emergency medical attention.

 

Types of Heart Disease Linked to Diabetes

Diabetes can increase the risk of several cardiovascular conditions. Recognizing their symptoms can help you seek medical attention promptly.

 

Coronary Artery Disease

Coronary artery disease (CAD) develops when plaque narrows the arteries that supply blood to the heart. Symptoms may include chest discomfort, pressure, shortness of breath during physical activity, and unusual fatigue. Some people experience no obvious symptoms, particularly in the early stages. Diabetes can also cause nerve damage that

 

reduces the ability to feel typical warning signs of heart problems. As a result, a heart attack may sometimes occur without the expected degree of chest pain.

 

Heart Attack

A heart attack usually occurs when blood flow to part of the heart muscle becomes blocked, preventing the muscle from receiving enough oxygen. Possible warning signs include:

• Chest pressure, tightness, discomfort, or pain
• Pain or discomfort in one or both arms, the back, neck, jaw, or stomach
• Shortness of breath
• Cold sweats
• Nausea or lightheadedness
• Sudden, unusual fatigue

 

Symptoms can vary, and some people experience mild or less typical warning signs. If you suspect a heart attack, call 911 immediately. Do not wait to see whether the symptoms go away.

 

Stroke

A stroke occurs when blood flow to part of the brain is interrupted or a blood vessel in the brain ruptures. Diabetes increases the risk of stroke by contributing to blood vessel damage and other cardiovascular risk factors. Remember the warning signs using BE FAST:

• B — Balance: Sudden loss of balance or coordination
• E — Eyes: Sudden vision changes
• F — Face: Facial drooping
• A — Arms: Weakness or numbness, especially on one side
• S — Speech: Slurred speech or difficulty speaking
• T — Time: Call 911 immediately

 

A sudden severe headache or confusion can also indicate a serious medical emergency. Seek emergency care even if symptoms begin to improve.

 

Peripheral Artery Disease

Peripheral artery disease (PAD) develops when narrowed arteries reduce blood flow, most commonly to the legs. Symptoms can include leg pain while walking that improves with rest, cold feet, slow-healing wounds, or changes in skin color. Some people have no noticeable symptoms in the early stages. Because diabetes can damage nerves, some people may not feel pain from foot injuries or circulation problems. Regular foot checks and prompt medical evaluation of wounds are particularly important.

 

Who Is at Greater Risk of Heart Disease With Diabetes?

Diabetes increases cardiovascular risk, but your individual risk depends on several factors, including your medical history, age, and other health conditions. Factors that can increase risk include:

• Longer duration of diabetes: Cardiovascular risk can increase with the duration of diabetes and the development of related complications.
• High blood pressure: Hypertension places additional strain on the heart and
• Unhealthy cholesterol levels: Elevated LDL cholesterol and triglycerides can contribute to plaque buildup.
• Smoking: Tobacco use damages blood vessels and substantially increases cardiovascular risk.
• Kidney disease: Diabetes-related kidney damage is associated with a higher risk of heart disease.
• Physical inactivity: Limited activity can make blood sugar, blood pressure, and cholesterol more difficult to manage.
• Family history: A close relative with early-onset cardiovascular disease may indicate increased risk.
• Older age: Cardiovascular risk generally increases with

 

These factors often overlap. For example, a person with diabetes, high blood pressure, and elevated LDL cholesterol may have a higher cardiovascular risk than someone with diabetes alone. Although some risk factors cannot be changed, others can be managed through lifestyle changes, regular monitoring, and appropriate medical treatment.

 

How Can You Reduce Your Risk of Heart Disease if You Have Diabetes?

Protecting your heart requires a comprehensive approach to diabetes management. This includes monitoring blood glucose, addressing other cardiovascular risk factors, and building sustainable healthy habits.

 

Monitor and Manage Your Blood Sugar

Keeping blood glucose within your individualized target range is an important part of reducing diabetes complications. An A1C test estimates your average blood glucose over approximately the previous two to three months. Your healthcare provider can use this result, along with other information, to evaluate your diabetes management. Your A1C target depends on factors such as your age, medications, other medical conditions, and risk of low blood sugar. Home glucose monitoring may also help you understand how food,

 

exercise, medication, and daily routines affect your blood sugar. Ask your healthcare provider how often you should check your glucose and what targets are appropriate for you.

 

Keep Blood Pressure Under Control

Regular blood pressure monitoring helps identify hypertension before it causes complications. Depending on your needs, helpful steps may include:

• Limiting sodium when recommended by your healthcare provider
• Eating a balanced, heart-healthy diet
• Engaging in regular physical activity
• Taking prescribed blood pressure medication as directed
• Attending regular medical checkups

 

Your ideal blood pressure target may differ from someone else’s, so work with your healthcare provider to establish an appropriate goal.

 

Manage Cholesterol Levels

Cholesterol testing helps your healthcare provider assess cardiovascular risk and determine whether lifestyle changes or medication may be beneficial. You can support healthier cholesterol levels by eating more fiber-rich foods, limiting saturated fat, exercising regularly, and avoiding tobacco. Statins are commonly recommended for many adults with diabetes, particularly those aged 40 to 75, depending on their cardiovascular risk and medical history. Some people may benefit from treatment earlier or later in life. The appropriate medication and dose should be determined with your healthcare provider. Do not stop or change prescribed cholesterol medication without medical guidance.

 

Choose a Heart-Healthy Diet

Your eating habits influence blood glucose, blood pressure, cholesterol, and overall cardiovascular health. A heart-healthy eating pattern generally emphasizes vegetables, whole fruits, whole grains, fiber-rich foods, and suitable sources of protein while limiting excess sodium, added sugars, and saturated fats. Consider including:

• Vegetables and whole fruits
• Whole grains, such as oats and whole-wheat products
• Beans, lentils, and other high-fiber foods
• Fish, lean poultry, tofu, or other plant-based proteins
• Nuts, seeds, and unsaturated oils in appropriate portions
• Water or other unsweetened beverages

 

Limit sugary drinks, highly processed snacks, and foods high in saturated fat or sodium. Carbohydrates remain part of a balanced diet, but the types, portions, and timing of

 

carbohydrate-rich foods can affect blood glucose. A registered dietitian or diabetes care and education specialist can help you create a plan that fits your preferences and medical needs.

 

Make Physical Activity Part of Your Routine

Regular physical activity can help improve blood glucose management, lower blood pressure, support cholesterol management, and strengthen cardiovascular health. Many adults should aim for at least 150 minutes of moderate-intensity aerobic activity each week, as tolerated and appropriate for their health. Options include:

• Brisk walking
• Cycling
• Swimming
• Water-based exercise
• Other activities suited to your fitness level

 

If you have heart disease, nerve damage, foot ulcers, or other complications, ask your healthcare provider which activities are safe for you. Arizona’s summer heat requires additional precautions. Consider exercising indoors during extreme temperatures, drinking water as appropriate for your medical needs, and avoiding the hottest parts of the day.

 

Avoid Smoking and Tobacco Products

Smoking damages blood vessels and increases the risk of heart attack, stroke, and other complications. When combined with diabetes, tobacco use can further increase cardiovascular risk. Quitting smoking can improve your health at any stage. If you need support, speak with your healthcare provider about counseling, quit-smoking programs, or medications that may help.

 

Maintain a Healthy Weight and Get Enough Sleep

For people carrying excess weight, gradual weight loss may improve blood glucose control, blood pressure, and other cardiovascular risk factors. Focus on sustainable habits, such as balanced meals, regular activity, and realistic goals, rather than extreme diets or rapid weight-loss methods. Sleep also plays an important role in overall health. Most adults need approximately seven to nine hours of sleep each night. If you regularly snore loudly, wake up feeling unrefreshed, or experience excessive daytime sleepiness, ask your healthcare provider whether sleep apnea could be contributing to your health concerns. Sleep apnea can occur alongside diabetes, obesity, and high blood pressure.

 

Common Tests Used to Monitor Heart Health in People With Diabetes

Regular medical checkups can help identify cardiovascular risk factors and diabetes-related complications before they become more serious. Depending on your health history, your healthcare provider may recommend the following tests and measurements.

 

Test or measurement	Why it matters
A1C or blood glucose testing	Assesses blood sugar management.
Blood pressure measurement	Checks for hypertension.
Lipid panel	Measures cholesterol and triglyceride levels.
Kidney function tests	Help assess kidney health and identify possible damage.
Weight and other health measurements	Help monitor relevant cardiovascular risk factors.
ECG or other cardiac tests	May help evaluate heart function when symptoms or clinical findings warrant further investigation.

 

Not everyone with diabetes needs every cardiac test. An electrocardiogram (ECG), echocardiogram, stress test, or other investigation may be appropriate depending on your symptoms, examination findings, and individual risk. Your healthcare provider can help determine which tests are necessary and how often you should have them.

 

When Should You See a Cardiologist?

Your primary care physician or diabetes specialist can manage many aspects of diabetes care and cardiovascular risk. However, a cardiology consultation may be appropriate if you have existing heart disease, concerning symptoms, or complex cardiovascular risk factors. Consider discussing a referral if you have:

• A history of coronary artery disease or a heart attack
• New or unexplained chest discomfort
• Shortness of breath during ordinary activities
• Persistent swelling in your legs or ankles
• Multiple cardiovascular risk factors that are difficult to control
• A strong family history of early heart disease

 

• Questions about your cardiovascular risk or the need for further testing

 

A cardiologist can evaluate your symptoms, review relevant test results, and coordinate treatment with your primary care physician and diabetes care team.

Important: If you experience possible heart attack or stroke symptoms, call 911 rather than waiting for a scheduled appointment.

 

Frequently Asked Questions About Diabetes and Heart Disease

Does diabetes always lead to heart disease?

No. Diabetes increases the risk of cardiovascular disease, but it does not mean that heart disease is inevitable. Managing blood glucose, blood pressure, and cholesterol, avoiding tobacco, staying active, and receiving appropriate medical care can help reduce your risk.

 

Why are people with diabetes more likely to have a heart attack?

High blood glucose can damage blood vessels and contribute to plaque buildup. Diabetes is also associated with other cardiovascular risk factors, including high blood pressure, unhealthy cholesterol levels, and kidney disease. Together, these factors can increase the likelihood of a heart attack.

 

Can you have heart disease without symptoms if you have diabetes?

Yes. Heart disease can develop without obvious symptoms, and diabetes-related nerve damage may reduce the sensation of certain warning signs. Regular medical care is important even when you feel well.

 

Does controlling blood sugar eliminate the risk of heart disease?

No. Blood glucose management is important, but it does not eliminate cardiovascular risk. Blood pressure, cholesterol, kidney health, smoking, physical activity, and other factors also affect your heart health.

 

Should everyone with diabetes take a statin?

Not everyone requires the same treatment. Statin recommendations depend on factors such as age, cholesterol levels, existing cardiovascular disease, and overall risk. Ask your healthcare provider whether a statin is appropriate for you.

 

What is the best exercise for people with diabetes who want to protect their heart?

Brisk walking, cycling, swimming, and other moderate-intensity activities can support heart health. The best choice depends on your fitness level, medical history, and any

diabetes-related complications. Consult your healthcare provider if you are unsure which activities are suitable.

 

How often should someone with diabetes have a heart health checkup?

The frequency depends on your health history, current risk factors, and treatment plan. Regular appointments help monitor blood glucose, blood pressure, cholesterol, and kidney function and allow your healthcare provider to adjust treatment when necessary.

 

Can people with diabetes live healthy lives without developing heart disease?

Yes. Many people with diabetes live long, active lives without developing cardiovascular disease. Although no treatment or lifestyle plan can guarantee prevention, consistent diabetes management, healthy habits, and appropriate medical care can substantially reduce risk.

 

Protect Your Heart While Managing Diabetes

Diabetes can increase your risk of heart disease, but understanding the connection gives you an opportunity to take action. Managing blood glucose, monitoring blood pressure and cholesterol, eating a balanced diet, staying physically active, avoiding tobacco, and attending regular medical checkups can all contribute to better cardiovascular health. For people living in Phoenix, Mesa, Scottsdale, Chandler, and other Arizona communities, working with a healthcare provider to create an individualized care plan can help address personal risk factors and support long-term well-being. Don’t focus on blood sugar alone. Make heart health part of your diabetes care routine, and speak with your healthcare provider about the screenings, lifestyle changes, and treatments that are right for you.