Diabetic heart disease: symptoms, risks, tests and which doctor to see
How diabetes harms the heart, why warning signs can be silent, the tests and treatments that protect you, and when to see a cardiologist.
What diabetic heart disease is
Diabetic heart disease means heart disease in a person who has diabetes. People with type 2 diabetes or type 1 diabetes are much more likely to develop heart disease or have a stroke than people without diabetes, and they tend to develop these problems at a younger age. Heart disease is one of the most serious long-term complications of diabetes, and also one of the most preventable.
Over years, high blood sugar damages the lining of blood vessels and the nerves that control the heart. Diabetes also tends to travel with high blood pressure and unhealthy cholesterol levels, which add to the damage. The main forms of heart disease this leads to are:
- Coronary artery disease — fatty plaque narrows the arteries that feed the heart muscle, which can cause angina or a heart attack.
- Heart failure — the heart cannot pump enough blood to meet the body's needs.
- Cardiomyopathy — the heart muscle itself becomes stiff, thick or weak.
Symptoms, and why they can be silent
In the early stages there are usually no symptoms at all. When heart disease progresses, symptoms depend on the type of problem and may include:
- Chest pain, pressure or heaviness, sometimes spreading to the arm, jaw, neck or back
- Shortness of breath, especially on exertion or when lying flat
- Fatigue that is new or out of proportion to activity
- Dizziness or fainting
- Swollen feet and ankles
- An irregular heartbeat, palpitations or a racing heart
Who is at higher risk
Among people with diabetes, the risk of heart disease is higher with:
- High blood pressure
- High LDL ('bad') cholesterol, high triglycerides or low HDL ('good') cholesterol
- Smoking or chewing tobacco
- Obesity, and especially extra fat around the waist even at a normal weight
- A family history of early heart disease
- Chronic kidney disease
- Long-standing or poorly controlled diabetes
- Being male, though women with diabetes are also at clearly raised risk
Many Indian adults carry weight around the abdomen, and doctors often use lower waist-size cut-offs for South Asian people when judging risk. Ask your doctor to measure your waist, not just your weight.
How it is diagnosed
Your doctor will ask about symptoms, how long you have had diabetes, other health conditions and family history, and will examine you. Regular check-ups for diabetes are also the time to measure your heart risk. Tests commonly used include:
- HbA1c — shows your average blood sugar over the past few months.
- Lipid profile — measures cholesterol and triglycerides.
- Blood pressure check at every visit, and sometimes home monitoring.
- Kidney tests, such as a urine albumin test and blood creatinine, because kidney disease raises heart risk.
- ECG — a quick recording of the heart's electrical activity.
- Echocardiogram — an ultrasound scan of the heart that shows how well it pumps and the state of the valves.
- Stress test — such as a treadmill test (TMT) or a stress scan, to see whether the heart gets enough blood during exertion. A CT coronary angiogram or a coronary angiogram may follow if needed.
Not everyone with diabetes needs every heart test. Your doctor will decide based on your symptoms and overall risk, and may refer you to a cardiologist.
Treatment and prevention
The same steps both prevent heart disease and stop it from getting worse. Treatment usually covers several areas at once:
- Blood sugar control — to targets agreed with your doctor. Some newer diabetes medicines have been shown to protect the heart and kidneys as well as lower sugar; ask whether one suits you.
- Blood pressure medicines where needed, to keep pressure within your target.
- Cholesterol-lowering medicines, most often statins, which many people with diabetes are advised to take even when cholesterol looks normal.
- Medicines to reduce the risk of clots, for some people, only on a doctor's advice.
- Angioplasty with a stent, or bypass surgery, when coronary arteries are badly narrowed. Your cardiologist will explain which suits your pattern of disease.
- Cardiac rehabilitation — supervised exercise and education after a heart attack or heart procedure.
- Treatment of heart failure or rhythm problems if these develop.
Daily habits matter as much as medicines:
- Stop smoking and chewing tobacco
- Aim for regular physical activity, such as brisk walking on most days, as your doctor advises
- Eat more vegetables, pulses, whole grains and fruit; cut down on refined rice and flour, sweets, fried snacks and sugary drinks
- Limit salt, including pickles, papads and packaged foods
- Keep a healthy weight and waist size
- Take medicines regularly, and do not stop them without asking
When it is an emergency
Call 112 or 108, or go to the nearest emergency department straight away, for:
- Chest pain, pressure or discomfort lasting more than a few minutes, or coming and going
- Sudden breathlessness, sweating, nausea or faintness, even without chest pain
- Collapse or loss of consciousness
- Sudden weakness of the face, arm or leg, or trouble speaking, which may be a stroke
Do not drive yourself to hospital. Every minute matters in a heart attack.
Which doctor to see
Care is usually shared. Your diabetologist, endocrinologist or general physician manages diabetes and checks your heart risk at regular visits. A cardiologist is the right specialist when you have heart symptoms, an abnormal ECG or stress test, known coronary artery disease or heart failure, or when your risk is high enough that your doctor wants a heart assessment.
You can find cardiologists in Bengaluru or diabetologists in Bengaluru on The Doctor Index, each with a registration you can check.
Questions to ask at your appointment
- What are my targets for HbA1c, blood pressure and cholesterol?
- Do I need an ECG, echocardiogram or stress test?
- Should I be on a statin, and would a diabetes medicine that protects the heart suit me?
- Which symptoms should make me call for an ambulance?
- How often should my heart risk be reviewed?
Common questions
Questions people ask
- Can I have a heart attack without chest pain if I have diabetes?
- Yes. Diabetes can damage the nerves that carry pain from the heart, so some people have a 'silent' heart attack or only feel breathlessness, sweating, nausea or unusual tiredness. Treat sudden symptoms like these as an emergency and call 112 or 108.
- If my sugar is well controlled, am I safe from heart disease?
- Good sugar control lowers the risk but does not remove it. Blood pressure, cholesterol, smoking, weight, activity and kidney health all matter too. That is why doctors treat these together and may advise a statin even when your sugar readings look good.
- Should everyone with diabetes have a treadmill test?
- Not necessarily. Routine stress testing is not advised for everyone. Your doctor will decide based on symptoms, ECG findings and overall risk. If you have chest discomfort, breathlessness on exertion or an abnormal ECG, a heart assessment by a cardiologist is usually advised.
- Can diabetic heart disease be reversed?
- Damage that has already happened usually cannot be undone, but its progress can be slowed considerably. Controlling sugar, blood pressure and cholesterol, stopping tobacco, staying active and taking prescribed medicines lower the chance of a heart attack and help the heart work better.
This condition is usually assessed by a cardiologist. Every profile shows the doctor’s registration and what has been checked.
Cardiologists in Bangalore
A few cardiologists listed on The Doctor Index. They are shown because of their speciality, not a stated interest in Diabetic Heart Disease; ask the clinic whether the doctor sees it.
Related conditions
- Angina
- Arrhythmia
- Atherosclerosis
- Atrial Fibrillation
- Cardiomyopathy
- Congenital Heart Defects
- Coronary Artery Disease
- Heart Attack
Practical reading
All postsSources
- MedlinePlus, US National Library of Medicine — Diabetic Heart Disease
- Emergency Response Support System, Government of India — 112
- MedlinePlus, National Library of Medicine — Diabetic Heart Disease — Public-domain health-topic summary
Diabetic heart disease: symptoms, risks, tests and which doctor to see is original text by The Doctor Index; the compiled source draft was used for research. Source: MedlinePlus, National Library of Medicine. Orphadata Science: Free access data from Orphanet. © INSERM 1999; July 2026 data, CC BY 4.0. This product uses the Human Phenotype Ontology (hp/releases/2026-09-01). Only sources listed for this article apply. Source material has been selected and arranged; HPO definitions are reproduced without alteration. No source organisation endorses this compilation. Köhler S et al. The Human Phenotype Ontology project: linking molecular biology and disease through phenotype data. Nucleic Acids Research 2014;42(D1):D966–D974. doi:10.1093/nar/gkt1026.
General information, not advice about your situation. Errors can be reported through the corrections process. Reference TDI-C-0737.