When it comes to checking your heart health, two common tests you may hear about are an Echocardiogram (ECHO) and an Electrocardiogram (ECG or EKG).
Although their names sound similar, these tests look at different aspects of your heart. An ECG checks your heart’s electrical activity, while an echocardiogram uses ultrasound to examine your heart’s structure and how well it pumps blood.
In this guide, we’ll explain the differences in simple terms, what each test can detect, and when a doctor may recommend one or both.
What Is an ECG Test?
An Electrocardiogram (ECG) is a quick, non-invasive test that records the electrical signals controlling your heartbeat.
During the test, small adhesive sensors called electrodes are placed on your chest and sometimes your arms and legs. These sensors record your heart’s electrical activity.
An ECG helps doctors evaluate:
- Your heart rate and rhythm.
- Irregular heartbeats (arrhythmias).
- Abnormal electrical conduction in the heart.
- Electrical changes that may suggest certain heart conditions, including a heart attack.
A standard resting ECG recording usually takes only a few minutes. It is painless and does not send electricity into your body.
What Is an Echocardiogram (ECHO Test)?
An Echocardiogram, also called an ECHO test or heart ultrasound, uses sound waves to create moving images of your heart.
Unlike an ECG, which records electrical activity, an echocardiogram allows doctors to see how the heart muscle, chambers and valves are working.
An echocardiogram can help doctors assess:
- The size and structure of the heart.
- How effectively the heart pumps blood.
- The movement and function of heart valves.
- Problems affecting the heart muscle.
- Fluid around the heart.
- Certain congenital or structural heart conditions.
For a standard transthoracic echocardiogram, a healthcare professional places an ultrasound probe on your chest with a small amount of gel. The examination commonly takes around 30–60 minutes, depending on the clinical requirements.
Good to know: A standard echocardiogram does not use X-rays or ionising radiation.
Echocardiogram vs ECG: Key Differences
Here is a simple comparison to help you understand what each examination does.
| Feature |
ECG |
Echocardiogram |
| Main purpose |
Checks electrical activity |
Checks heart structure and function |
| Technology |
Electrodes |
Ultrasound |
| What it shows |
Heartbeat rhythm and electrical patterns |
Heart chambers, valves and pumping action |
| Typical duration |
A few minutes |
30–60 minutes |
| Painful? |
No |
Generally painless; some probe pressure is possible |
| Radiation |
None |
None |
Which Heart Test Do You Need?
The right test depends on your symptoms, medical history and what your doctor wants to investigate.
When Might a Doctor Recommend an ECG?
An ECG may be recommended if you experience:
- A racing or irregular heartbeat.
- Heart palpitations.
- Dizziness or fainting.
- Symptoms suggesting an electrical rhythm problem.
An ECG may also be performed as part of a cardiac assessment or when certain heart conditions are suspected.
When Might a Doctor Recommend an Echocardiogram?
An echocardiogram may be recommended to investigate:
- Unexplained shortness of breath.
- A heart murmur.
- Possible heart valve disease.
- Suspected heart failure or reduced pumping function.
- Heart enlargement or structural abnormalities.
- Previously diagnosed heart conditions that require monitoring.
Sometimes, your doctor may recommend both tests. This is because an ECG and an echocardiogram provide different information and can complement each other.
Echocardiogram Price in Bangkok
If you’re looking for an echocardiogram in Bangkok, MedEx can help you arrange a standalone ECHO examination.
Echocardiogram (ECHO Test) at MedEx
THB 4,450
Book a standalone echocardiogram through MedEx in Bangkok. Contact our team to confirm appointment availability, examination location and what is included in the price.
For patients who need a broader heart health assessment, MedEx also provides cardiac screening packages covering selected cardiovascular risk tests and medical assessments.
Learn more about our Cardiac Screening Packages in Bangkok.
Can an Echocardiogram Detect Blocked Arteries?
This is a common question.
A standard resting echocardiogram examines the heart’s structure and pumping function, but it does not directly show whether your coronary arteries are blocked.
A specialised test called a stress echocardiogram may help doctors identify changes that suggest reduced blood supply to the heart muscle.
Depending on your symptoms and risk factors, your doctor may recommend other investigations, such as a coronary CT angiogram or additional cardiac testing.
How to Prepare for an ECG or Echocardiogram
Both examinations are generally straightforward.
For a standard resting ECG:
- Wear comfortable clothing.
- You may need to remove clothing from your upper body for electrode placement.
- Avoid applying lotions or oils to your chest before the examination.
- Usually, no fasting is required.
For a standard transthoracic echocardiogram:
- You can usually eat and drink normally.
- Wear comfortable clothing that allows access to your chest.
- Tell the healthcare professional about your medical history and current medications.
- Follow any specific instructions provided during booking.
Other types of echocardiography, including stress and transesophageal examinations, may require different preparation.
Frequently Asked Questions
1. Is an ECG the same as an echocardiogram?
No. An ECG records your heart’s electrical signals, while an echocardiogram uses ultrasound to show the heart’s structure and movement.
2. Which is better, an ECG or an echocardiogram?
Neither test is universally better. They answer different medical questions. An ECG is particularly useful for assessing heart rhythm, while an echocardiogram provides information about the heart muscle, valves and pumping function.
3. Can an ECG be normal even if I have a heart problem?
Yes. A normal resting ECG does not rule out every heart condition. Some problems may not affect the recording at that moment, and structural abnormalities may require an echocardiogram or another investigation.
4. Is an echocardiogram painful?
A standard echocardiogram is generally painless. You may feel some pressure when the ultrasound probe is moved across your chest.
5. How much does an echocardiogram cost at MedEx?
The MedEx customer price for a standalone echocardiogram is THB 4,450. Contact our team to confirm the appointment details and any additional services you may require.
6. Do I need both an ECG and an echocardiogram?
Not everyone needs both tests. Your doctor will consider your symptoms, examination findings and medical history before recommending the appropriate investigations.
Book Your Heart Health Assessment With MedEx
Understanding your heart health starts with choosing the right examination.
Whether you need an ECG, an echocardiogram or a more comprehensive cardiovascular assessment, the MedEx team can help you explore the available options and arrange the next steps.
Contact MedEx to learn more about our Echocardiogram service in Bangkok, priced at THB 4,450.
MedEx Neo Clinic – Bangkok
Main Clinic: The Trendy Office Building, Floor 1A, Sukhumvit Soi 13, Bangkok.
Location: Near BTS Nana, BTS Asok and MRT Sukhumvit.
Opening Hours: Daily, 6:00 AM – 10:00 PM.
Phone: 02-544-0001
Website: www.medex.co.th
Note: Clinic contact details are provided for booking assistance. Confirm the echocardiogram examination location with our team before visiting.
Medical Disclaimer: This article is for general health information only and is not a substitute for professional medical advice, diagnosis or treatment. Your doctor will determine which cardiac tests are appropriate for your individual circumstances. If you experience sudden or severe chest pain, severe breathing difficulty or other symptoms of a possible heart attack, seek emergency medical attention immediately rather than booking a routine test.
