ECG, Echo, and Stress Test: Which Cardiac Test Do You Need?
Cardiac Tests Demystified
Patients often feel anxious when referred for cardiac tests. Understanding what each test does — and doesn't do — can ease that anxiety and help you participate actively in your healthcare.
ECG (Electrocardiogram)
What it does: Records the electrical activity of your heart through 10 electrodes placed on your chest and limbs. Takes 5 minutes.
What it reveals: Heart rhythm abnormalities (arrhythmias), signs of a current or previous heart attack, enlargement of heart chambers, and effects of medications.
When it's ordered: Routine health checkups (especially 40+), chest pain evaluation, pre-surgical clearance, monitoring medication effects.
Limitations: A normal ECG doesn't guarantee a healthy heart. Many heart conditions only show up during exertion, not at rest. That's where the stress test comes in.
Cost: ₹200-500 at most clinics in India.
Echocardiogram (Echo / 2D Echo)
What it does: An ultrasound of the heart that creates real-time moving images. Completely non-invasive, painless, takes 20-30 minutes.
What it reveals: Heart muscle strength (ejection fraction), valve function, heart chamber sizes, fluid around the heart, congenital defects, and blood flow patterns.
When it's ordered: Heart murmur investigation, breathlessness evaluation, after a heart attack (to assess damage), monitoring valve disease, pre-surgery cardiac fitness.
What to know: No preparation needed. You'll lie on your left side while the technician moves a probe across your chest with gel. The images are interpreted by a cardiologist.
Cost: ₹1,500-3,000 at most centres.
Treadmill Test (TMT / Stress Test)
What it does: You walk on a treadmill with gradually increasing speed and incline while your ECG, blood pressure, and symptoms are monitored continuously.
What it reveals: How your heart performs under physical stress. Blockages that don't show on a resting ECG may become apparent when the heart is working harder.
When it's ordered: Evaluating chest pain, assessing exercise capacity, clearing patients for vigorous exercise or surgery, monitoring recovery after heart procedures.
Preparation: Wear comfortable clothes and walking shoes. Avoid heavy meals 2 hours before. Some medications may need to be paused (your doctor will advise).
Cost: ₹1,500-3,500.
Advanced Tests (When Basic Tests Aren't Enough)
CT Coronary Angiography: A CT scan that visualises coronary arteries without catheterisation. Cost: ₹8,000-15,000.
Coronary Angiography (Catheter-based): The gold standard. A thin tube is inserted through the wrist/groin to directly visualise blockages. Cost: ₹15,000-30,000.
Trust your cardiologist's recommendation about which tests you need. Over-testing is wasteful, but under-testing can be dangerous. The right test at the right time provides the answers needed to protect your heart.
