You walk on a treadmill while your ECG and blood pressure are recorded, to see whether your heart gets enough blood when it has to work harder.
At rest you feel fine. It's the climb to the third floor, or hurrying for the metro, that brings on a tight, heavy feeling in the chest, and it eases when you stop. Your resting ECG is normal, because a narrowed artery often causes trouble only when the heart needs more blood than it can get.
A treadmill stress test (TMT), also called an exercise ECG, puts your heart under a controlled load. You walk on a treadmill that gets faster and steeper every 3 minutes while your ECG and blood pressure are recorded. The aim is to reach a target heart rate, usually about 85% of the maximum expected for your age. Certain ECG changes at higher heart rates suggest part of the heart muscle is running short of blood.
It's a sensible, low-risk first test, but not a perfect one. It misses some narrowed arteries, and it sometimes flags a problem in people whose arteries turn out to be healthy, which happens more often in women. A positive or unclear result usually leads to another test before any treatment.
Treadmill testing is done in our cardiology unit. If you already have heart disease, a repeat test later shows how well treatment is working.
A TMT is usually the first test for suspected angina in someone who can walk comfortably. It also shows how your heart copes with exercise.
The standard test. It follows a set plan, often the Bruce protocol, that raises speed and slope in 3-minute stages.
Ultrasound pictures of the heart are taken before and straight after exercise. Watching the walls move gives more accurate results than the ECG alone, particularly in women.
If you can't walk on a treadmill, a medicine through a drip makes the heart work harder while it's scanned. A nuclear scan uses a small dose of radioactive tracer to show which parts of the muscle get less blood. Some patients are referred for these.
ECG stickers go on your chest and a blood pressure cuff on your arm, and a resting ECG and blood pressure are recorded.
After a quick practice, the treadmill starts slowly on a gentle slope. Every 3 minutes it gets faster and steeper, with your ECG running throughout and your blood pressure checked at each stage. Most people walk for 6 to 12 minutes.
The test ends when you reach your target heart rate or are too tired to go on, or earlier with chest pain, marked breathlessness, dizziness or worrying ECG changes. Tell the staff about any symptom straight away.
You sit or lie down while the ECG and blood pressure are watched for another 5 to 10 minutes. Some changes show up only in this phase.
A negative (normal) test means no significant ECG changes appeared at a good heart rate. With good exercise capacity, it suggests a low risk of a serious blockage. A positive test means the ECG showed changes, typically ST depression of 1 mm or more, which suggest part of the heart muscle was short of blood. It carries more weight if your usual chest pain came on too.
An inconclusive result means the test couldn't answer the question, often because you didn't reach the target heart rate. The report also gives your exercise capacity in METs (a measure of the work you did), your blood pressure response and any rhythm changes. Being able to exercise well is a good sign for the heart in itself.
After a positive or inconclusive test, the next step is usually a stress echo, a CT coronary angiogram or a coronary angiogram, depending on how strong the result is and how troublesome your symptoms are.
You rest while monitoring continues. Most people feel back to normal within a few minutes.
You can eat, work and drive home. Wait an hour or so before a hot bath or shower, since heat straight after exercise can make you light-headed.
The cardiologist usually explains the result the same day. If it's positive, avoid heavy exertion until you've had the next test and have a treatment plan.
Call us on +91-8826000033 or come straight to our 24/7 emergency department.
More accurate than a treadmill ECG, and the better choice when your resting ECG is abnormal. Medicine-based versions suit people who can't walk on a treadmill.
A CT scan with dye given into an arm vein shows the arteries directly. It's good at ruling out disease in people at low to moderate risk.
If your symptoms are severe, or other findings suggest high risk, your cardiologist may skip the treadmill and recommend a catheter angiogram.
Talk to our Cardiology team
Ask about your options, the cost and your insurance before you decide. See the insurance and TPA panels we work with.
This page explains Treadmill Stress Test (TMT) in general terms. Your own plan depends on your health, your test results and your doctor's advice. Please read our medical disclaimer.
Treadmill Stress Test (TMT) is led by our Cardiology team, with other departments stepping in at each stage of your care.
At Prakash Hospital, our Cardiology Department offers expert, round-the-clock care, providing timely diagnosis and advanced treatments for heart conditions to keep your heart healthy and strong.
What the department treats
Interventional Cardiology
Echocardiography
Cardiac Rehabilitation
Pacemaker Implantation
Angioplasty and Stenting
Heart Failure Management
Uses your exercise capacity from the test to plan safe exercise in cardiac rehabilitation.
Controls diabetes, blood pressure and cholesterol, the risk factors that often lead to a TMT.
Runs the lipid profile, HbA1c and other blood tests that go with a heart risk check.
Procedures often considered alongside Treadmill Stress Test (TMT), or that treat related conditions.
An X-ray dye test that maps blockages in the heart's arteries and guides the choice between medicines, stents and surgery.
An ultrasound of the heart that shows how well it pumps and how the valves work. Painless and radiation-free.
Opens a narrowed or blocked heart artery with a balloon and a stent, passed up from the wrist or groin.
A portable ECG worn for 24 to 48 hours to catch irregular heartbeats that come and go.
Measures pressure and oxygen inside the heart and lungs through a thin tube, to guide valve and heart failure care.
Other procedures our Cardiology team performs.
We offer expert care across key specialties, including Medicine, Cardiology, Orthopaedics, ENT, Gynaecology, and more—delivering trusted treatment under one roof.
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