Diabetes & Heart Disease: What You Need to Know
Updated: Sep 28
Written by Dr. Adam Makis in TheSkyMeds Editorial Standards
Medically reviewed by Jonathan Reed, Medical Content Reviewer Jan 28 2026
Diabetes and heart disease are closely connected because persistently high blood sugar can damage blood vessels and the nerves that help control the heart. Diabetes and heart disease also share several important risk factors, including high blood pressure, unhealthy cholesterol levels, excess weight, smoking, and physical inactivity. CDC states that people with diabetes have about twice the risk of heart disease compared with people without diabetes. The risk generally increases the longer someone has diabetes, but developing cardiovascular disease is not inevitable. Managing blood pressure, cholesterol, blood sugar, kidney health, smoking, physical activity, and weight can all be important parts of prevention. For some people with type 2 diabetes, specific glucose-lowering medicines are now selected partly because they have demonstrated cardiovascular or heart-failure benefits—not simply because they lower A1C. Understanding that bigger picture can help you protect both metabolic and cardiovascular health.
Why Does Diabetes Increase the Risk of Heart Disease?
Diabetes can affect the cardiovascular system in several ways. Over time, high blood glucose can damage blood vessels, while high blood pressure, abnormal cholesterol, kidney disease, obesity, and other cardiovascular risk factors commonly occur alongside diabetes.
The CDC explanation of diabetes and heart health notes that people with diabetes are also at greater risk of heart failure.
Cardiovascular disease, or CVD, is a broad term. It includes atherosclerotic cardiovascular disease—such as heart attack, stroke, and peripheral artery disease—as well as heart failure. The 2026 American Diabetes Association (ADA) Standards identify atherosclerotic cardiovascular disease as the leading cause of illness and death among people with diabetes.
How does high blood sugar affect blood vessels?
Persistently high blood sugar can damage blood vessels and the nerves involved in cardiovascular function.
Atherosclerosis is another central part of the picture. This is the buildup of cholesterol-containing plaque within artery walls. When arteries supplying the heart become narrowed or blocked, a heart attack can occur; disease affecting blood vessels supplying the brain can contribute to stroke.
Why do blood pressure and cholesterol matter so much?
High blood pressure places additional stress on artery walls, while excessive LDL cholesterol can contribute to plaque formation. Having diabetes and hypertension together substantially increases cardiovascular risk.
People with type 2 diabetes may also have a pattern involving high triglycerides, low HDL cholesterol, or elevated LDL cholesterol. These abnormalities can add to atherosclerotic cardiovascular risk.
Protecting your heart when you have diabetes means looking beyond glucose. Current diabetes care addresses the whole cardiovascular risk profile—including blood pressure, LDL cholesterol, smoking, kidney disease, weight, physical activity, and, when appropriate, medicines with demonstrated cardiovascular benefit.
What Heart Problems Are Linked With Diabetes?
Diabetes is associated with several cardiovascular conditions rather than one particular type of heart disease. Important concerns include coronary artery disease, heart attack, stroke, heart failure, and peripheral artery disease.
Condition | What happens | Why it matters with diabetes |
Coronary artery disease | Plaque narrows arteries supplying the heart | Can lead to angina or heart attack |
Heart attack | Blood supply to part of the heart becomes blocked | Diabetes increases cardiovascular risk |
Stroke | Blood flow to part of the brain is blocked or a vessel ruptures | Diabetes and high blood pressure are important risk factors |
Heart failure | Heart cannot pump or fill effectively enough to meet the body's needs | People with diabetes have increased heart-failure risk |
Peripheral artery disease | Arteries supplying the limbs become narrowed | Can reduce blood flow to legs and feet |
Atherosclerosis | Plaque builds within artery walls | Underlies many cardiovascular complications |
What is coronary artery disease?
Coronary artery disease develops when plaque accumulates in arteries supplying the heart. As the artery narrows, the heart muscle may receive less oxygen-rich blood.
A plaque can also rupture and trigger formation of a blood clot. If blood flow to part of the heart is suddenly blocked, a heart attack can result.
Why is heart failure important in diabetes?
Heart failure means the heart cannot pump or fill effectively enough to meet the body's needs. Symptoms can include breathlessness, reduced exercise tolerance, fatigue, and swelling caused by fluid buildup.
The 2026 ADA Standards emphasize that adults with diabetes have increased risk of both asymptomatic structural or functional heart abnormalities and symptomatic heart failure.
Importantly, heart failure and atherosclerotic cardiovascular disease are related but different problems. Someone can develop heart failure without first having a recognized heart attack.
What is peripheral artery disease?
Peripheral artery disease, or PAD, usually involves atherosclerotic narrowing of arteries supplying the legs. It can cause pain or cramping while walking, reduced pulses, poor wound healing, or other signs of impaired circulation.
CDC notes that PAD can sometimes be the first sign that a person with diabetes has cardiovascular disease.
How Can You Lower Heart Disease Risk With Diabetes?
Cardiovascular prevention works best when several risk factors are managed together. Blood sugar remains important, but so do blood pressure, cholesterol, tobacco exposure, physical activity, nutrition, kidney health, and weight.
The 2026 ADA Standards for cardiovascular disease and diabetes provide current evidence-based recommendations covering blood pressure, cholesterol treatment, cardiovascular medications, heart failure, kidney disease, and cardiovascular screening.
Know your A1C, blood pressure, and cholesterol
A1C reflects average blood glucose over roughly the previous two to three months. Your individual target depends on factors such as age, health conditions, hypoglycemia risk, and treatment priorities.
Blood pressure and cholesterol need separate attention. Good glucose control does not automatically correct hypertension or high LDL cholesterol.
The ADA recommends statin treatment for many adults with diabetes based on age and cardiovascular risk. For example, its 2026 Standards recommend at least moderate-intensity statin therapy for people with diabetes aged 40–75 without established atherosclerotic cardiovascular disease, with more intensive treatment recommended for some higher-risk individuals.
These are clinical recommendations rather than a reason to start cholesterol medication independently.
Stop smoking
Smoking adds cardiovascular risk whether or not someone has diabetes. In a person who already has elevated cardiovascular risk from diabetes, avoiding tobacco becomes particularly important.
Stopping smoking benefits more than the heart. It also reduces risks involving blood vessels, lungs, cancer, and other diabetes-related complications.
Stay physically active
Regular physical activity can improve insulin sensitivity, help manage blood glucose, support blood pressure and weight management, and improve cardiovascular health.
The American Heart Association recommends at least 150 minutes of moderate-intensity aerobic activity or 75 minutes of vigorous aerobic activity per week for overall cardiovascular health, plus muscle-strengthening activity on at least two days per week.
People with established heart disease, significant diabetes complications, or a long period of inactivity may need individualized advice before beginning vigorous exercise.
Choose a heart-supportive eating pattern
A heart-supportive eating pattern generally emphasizes vegetables, fruits, whole grains, legumes, and appropriate sources of protein while limiting heavily processed foods and excessive saturated fat, sodium, and added sugars.
There is no single mandatory “diabetes heart diet.” The goal is an eating pattern that supports glucose management, blood pressure, cholesterol, weight where relevant, nutritional adequacy, and long-term adherence.
Which Diabetes Medicines Can Also Protect the Heart?
Some glucose-lowering medicines now have demonstrated cardiovascular benefits in selected people with type 2 diabetes. Two particularly important medication classes are SGLT2 inhibitors and GLP-1 receptor agonists, although the appropriate drug depends on the person's cardiovascular, kidney, metabolic, and other health factors.
The 2026 ADA Standards recommend an SGLT2 inhibitor or GLP-1 receptor agonist with demonstrated cardiovascular benefit as part of comprehensive cardiovascular risk reduction for people with type 2 diabetes who have established atherosclerotic cardiovascular disease or chronic kidney disease.
For people with type 2 diabetes and established ASCVD, multiple ASCVD risk factors, or chronic kidney disease, these drug classes can also be recommended specifically to reduce cardiovascular events.
What are SGLT2 inhibitors?
SGLT2 inhibitors lower blood glucose partly by causing the kidneys to excrete more glucose in urine.
Their importance now extends beyond glucose lowering. Specific drugs in this class have demonstrated cardiovascular, heart-failure, and kidney benefits in appropriate patient populations. The ADA therefore recommends them in several type 2 diabetes scenarios involving cardiovascular disease, heart failure, or chronic kidney disease.
This is a class with important differences between individual medicines, indications, and safety profiles, so it should not be treated as a universal prescription for everyone with diabetes.
What are GLP-1 receptor agonists?
GLP-1 receptor agonists affect glucose regulation, appetite, and other metabolic pathways. Certain agents have demonstrated cardiovascular benefits.
Current ADA guidance recommends a GLP-1 receptor agonist with demonstrated cardiovascular benefit for people with type 2 diabetes and established atherosclerotic cardiovascular disease, multiple ASCVD risk factors, or chronic kidney disease.
These medications are selected according to individual cardiovascular risk, kidney function, weight-management goals, adverse-effect considerations, cost and access, and other medical factors.
Do | Don't |
Know your blood pressure, cholesterol, glucose, and kidney status | Do not focus only on your glucose reading |
Take prescribed blood pressure and cholesterol medicines consistently | Do not stop cardiovascular medicines because glucose is controlled |
Discuss cardiovascular risk during diabetes reviews | Do not assume absence of symptoms means zero risk |
Be physically active at a level appropriate for your health | Do not suddenly start strenuous exercise if medical assessment is needed |
Avoid smoking and tobacco | Do not underestimate smoking because other numbers look good |
Ask whether your diabetes medicines fit your heart and kidney risk | Do not switch diabetes medicines without medical guidance |
Seek urgent care for heart attack or stroke warning signs | Do not wait for the next diabetes appointment during an emergency |
Should Everyone With Diabetes Be Screened for Heart Disease?
Not necessarily with heart imaging or stress testing. Risk-factor assessment is important for everyone with diabetes, but routine coronary artery disease screening in people without symptoms is not generally recommended simply because they have diabetes.
The 2026 ADA Standards state that routine coronary artery disease screening in asymptomatic individuals is not recommended when cardiovascular risk factors are being treated, because routine screening has not been shown to improve outcomes.
Testing becomes more relevant when symptoms or signs suggest cardiovascular disease. These can include chest discomfort, unexplained breathlessness, exercise-related symptoms, signs of peripheral artery disease, previous stroke-like symptoms, or certain abnormal ECG findings.
What should be checked regularly?
Cardiovascular risk assessment commonly includes blood pressure, cholesterol and triglycerides, diabetes control, smoking status, body weight where relevant, and kidney health.
The American Heart Association guidance on cardiovascular disease and diabetes emphasizes the combined importance of blood pressure, cholesterol, physical activity, weight, glucose, and smoking in determining cardiovascular risk.
Kidney function deserves particular attention because diabetes, cardiovascular disease, and chronic kidney disease frequently overlap. Current cardiovascular risk assessment increasingly considers these conditions together rather than treating each as an isolated problem.
Can you have heart disease without symptoms?
Yes. Atherosclerosis can develop over many years before obvious symptoms appear, and diabetes can coexist with asymptomatic cardiovascular abnormalities.
That does not mean everyone needs extensive cardiac testing. Current ADA recommendations instead emphasize systematic cardiovascular risk-factor treatment and targeted investigations when clinical findings justify them.
What Heart Symptoms Should People With Diabetes Never Ignore?
Symptoms that could indicate a heart attack, stroke, or serious heart problem require urgent assessment.
Do not wait for a routine diabetes appointment if new severe cardiovascular symptoms develop.
Possible heart-attack symptoms can include chest pressure, squeezing, fullness, or pain; discomfort spreading to the arm, shoulder, back, neck, or jaw; breathlessness; sweating; nausea; lightheadedness; or unusual weakness.
Women and people with diabetes may sometimes experience symptoms that are less stereotypical than dramatic chest pain, so unexplained breathlessness, severe fatigue, nausea, or upper-body discomfort should not automatically be dismissed.
Stroke warning signs include sudden facial weakness, arm or leg weakness or numbness—especially on one side—speech difficulty, confusion, vision changes, severe dizziness or loss of coordination, or a sudden severe headache.
Heart failure may develop differently. Increasing breathlessness, difficulty breathing when lying flat, rapid weight gain from fluid retention, swelling of the feet or legs, and worsening exercise tolerance deserve prompt medical assessment.
If symptoms suggest a heart attack or stroke, contact emergency medical services immediately rather than driving yourself or waiting to see whether symptoms disappear.
Conclusion
Diabetes and heart disease are closely linked, but higher cardiovascular risk does not mean cardiovascular disease is unavoidable. Protecting your heart involves more than lowering glucose: blood pressure, LDL cholesterol, smoking, physical activity, kidney health, nutrition, and weight can all influence risk. Current ADA guidance also recommends diabetes medicines with demonstrated cardiovascular benefits for selected people with type 2 diabetes and cardiovascular or kidney disease.
Work with your healthcare team to understand your individual cardiovascular risk and treatment goals rather than changing medication independently. If chest pain, severe breathlessness, stroke symptoms, fainting, or other possible cardiovascular emergency symptoms occur, seek urgent medical care.
Frequently Asked Questions
1 . How much does diabetes increase the risk of heart disease?
CDC states that people with diabetes have about twice the risk of heart disease compared with people without diabetes. Individual risk still varies according to age, diabetes duration, blood pressure, cholesterol, smoking, kidney health, weight, physical activity, and whether cardiovascular disease is already present.
2 . Why does diabetes damage the heart?
Persistently high blood sugar can damage blood vessels and nerves involved in cardiovascular function. Diabetes also commonly occurs alongside hypertension, abnormal cholesterol, obesity, and kidney disease. These overlapping problems can accelerate cardiovascular disease, which is why heart protection requires more than glucose control alone.
3 . Can well-controlled diabetes still cause heart disease?
Yes. Good glucose management is important, but cardiovascular risk does not depend on glucose alone. The American Heart Association notes that people with diabetes can remain at increased cardiovascular risk even when glucose is controlled. Blood pressure, cholesterol, smoking, kidney health, activity, and other factors also require attention.
4 . Which diabetes medicines are good for the heart?
Certain SGLT2 inhibitors and GLP-1 receptor agonists have demonstrated cardiovascular benefits in appropriate people with type 2 diabetes. The 2026 ADA Standards recommend these classes in several situations involving established cardiovascular disease, multiple cardiovascular risk factors, heart failure, or chronic kidney disease. Treatment should be individualized.
5 . Should everyone with diabetes have a heart stress test?
No. The 2026 ADA Standards do not recommend routine coronary artery disease screening in asymptomatic people when cardiovascular risk factors are appropriately treated. Cardiac testing may be appropriate when symptoms, vascular disease, ECG abnormalities, or other clinical findings suggest underlying cardiovascular disease.
6 . What is the most important way to protect my heart if I have diabetes?
There is no single measure. Cardiovascular prevention combines glucose management with blood-pressure and cholesterol control, avoiding tobacco, regular physical activity, appropriate nutrition, kidney monitoring, and medication when indicated. Your priorities should be based on your individual cardiovascular and diabetes risk profile.
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