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When it comes to heart health, timing is crucial. In India, where heart disease is one of the leading causes of death, knowing how your heart is functioning can literally save your life. The electrocardiogram (ECG) is a common test to detect heart problems when patients visit their doctors with heart-related concerns. In this blog, let us deep dive into ECG and how you should prepare yourself before undergoing a heart ECG test.
The Department of Cardiology at Manipal Hospitals, Salem, is equipped with advanced ECG machines, skilled professionals, and top cardiologists in Salem. Contact or visit Manipal Hospitals to book your ECG tests and schedule an appointment with our experienced cardiologists.
Synopsis
What is an ECG?
An electrocardiogram (ECG or EKG) is a simple and painless test that records the electrical signals produced by the heart as it beats. These test results can be used to assess how well your heart is functioning.
During an ECG, small sensors called electrodes are placed on your chest, arms, and legs. They’re connected by wires to an ECG machine, which records the heart activity and shows it as a graph. This graph helps cardiologists spot irregular heart rhythms (arrhythmias), damage from a heart attack, or signs of other heart problems.
Doctors generally recommend an ECG when you may experience issues like:
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Chest pain
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Dizziness or fainting
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Irregular heartbeat
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Enlarged heart chambers
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Issue with heart valves
You don’t have to be seriously ill to get one. Many people get heart ECGs as part of their routine check-ups, especially if there’s a family history of heart disease or conditions like diabetes and high blood pressure.
Different Types of ECG Tests
There are different types of ECG tests. Depending on your symptoms, the best cardiologist in Salem might recommend one of the following:
1. Resting ECG
This is the most common type of ECG test performed in general. You would be asked to lie still on a table, and the test takes about 5–10 minutes. It’s performed in hospitals and clinics.
2. Exercise ECG (Stress Test/Treadmill Test)
For this test, you are asked to walk on a treadmill or pedal a stationary bike. It measures how your heart responds to physical stress and helps detect problems that may not be noticeable when you are at rest.
3. Holter Monitor (24–48 Hour ECG)
The Holter monitor is a small wearable ECG device that records your heart’s activity for over 24 or 48 hours. It’s used when irregular cardiac symptoms, such as palpitations or unexplained fatigue, come and go. You can go about your normal day while wearing the instrument.
4. Event Monitor
Similar to the Holter monitor, this device is worn for longer periods (up to 30 days). However, it only records when triggered by the patient during symptoms. Event monitors are recommended for people with worrying episodes, like fainting spells or irregular heartbeats that happen occasionally.
Benefits of ECG Testing
There are several benefits to the test, such as:
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It is Fast and Painless: An ECG is quick and doesn’t involve needles. It also doesn’t cause any discomfort during the test.
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Offers Reliable Heart Insights: It gives a clear picture of your heart’s rhythm and electrical activity within minutes.
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Gives Early Warning Signs: ECGs can detect heart issues even before symptoms appear. Therefore, it can help catch problems early.
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Supports Treatment Decisions: Doctors use ECG results to decide the right treatment path for the underlying issues detected.
Findings: Normal Electrocardiogram Vs Abnormal Electrocardiogram
| Features | Normal ECG | Abnormal ECG |
|
Heart Rhythm/Beat |
Regular and consistent (sinus rhythm) |
Irregular (arrhythmias), too fast (tachycardia), or too slow (bradycardia) |
|
Heart Rate |
Between 60 and 100 beats per minute (bpm) |
Outside the normal range (e.g., < 60 bpm or > 100 bpm) or with rapid fluctuations |
|
Waveforms (Electrical Spikes) |
All waves (P wave, QRS complex, T wave) are present, have a consistent shape, with a predictable sequence and duration |
Missing waves that appear in strange shapes, or have short intervals, indicating ischemia (reduced blood flow) or myocardial infarction (heart attack) |
|
ST Segment (Resting Line Between Beats) |
Isoelectric (flat) – lies on the baseline. |
Elevated or depressed - a sign of myocardial ischemia or heart attack |
How to Prepare For An ECG?
Usually, no special preparation is needed for an ECG test. However, follow these general instructions:
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Eat and drink as normal, unless your doctor tells you otherwise.
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Avoid applying greasy lotions or oils on your chest the day of the test. They can interfere with electrode contact.
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Wear a two-piece outfit, as you may need to remove your top for chest electrode placement.
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Inform your doctor about any medications you’re taking.
What to Expect During the ECG Test?
An ECG is a very safe procedure. It doesn’t deliver any electrical current to your body; it simply records the heart’s natural electrical activity. Some people may experience mild skin irritation from the adhesive electrodes applied to the skin. Here’s what you can expect when you get an ECG:
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You’ll be asked to lie down and relax.
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A technician will place small electrodes on your chest, arms, and legs.
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These are connected to a machine that records your heart’s electrical activity.
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The test is painless and takes less than 10 minutes.
Conclusion
Getting an ECG offers a window into your heart’s health. If you’ve had symptoms like chest discomfort, irregular pulse, or even just a strong family history of heart disease, don’t wait. Talk to your doctor about getting an ECG.
Explore More of Our Blogs: Panic Attacks Vs Heart Attacks: Everything You Need to Know
FAQ's
No, an ECG is not a painful procedure. You might feel the cold electrodes placed on your skin during the procedure.
An ECG is a very common test to detect cardiac anomalies. It takes only 5 to 10 minutes and is done quickly in a hospital or clinic.
An ECG is a very common test to detect cardiac anomalies. It takes only 5 to 10 minutes and is done quickly in a hospital or clinic.
Yes, you can eat and drink normally before the procedure. No fasting is required unless told otherwise by your cardiologist.
Yes, you can eat and drink normally before the procedure. No fasting is required unless told otherwise by your cardiologist.
An ECG is completely safe. It doesn’t use electricity or cause any harm. You may experience mild skin irritation from the adhesive electrodes applied to the skin.
An ECG is completely safe. It doesn’t use electricity or cause any harm. You may experience mild skin irritation from the adhesive electrodes applied to the skin.
If your ECG report indicates any abnormal electrical activity in the heart, your cardiologist may suggest more cardiac tests like Holter monitoring, treadmill test (TMT), echocardiogram (ECHO), and blood tests. It will guide the doctor to accurately diagnose the root cause of your symptoms and curate a treatment plan.
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