What is an ECG?
An electrocardiogram (ECG or EKG) is a non-invasive medical test that records your heart's electrical activity. It provides valuable information about your heart's rhythm, rate, and overall function.
How Does It Work?
The test works by:
- Placing small adhesive electrodes on specific areas of your chest, arms, and legs
- These electrodes detect tiny electrical impulses produced by your heartbeat
- The signals are recorded and displayed as waves on paper or a digital screen
What Does It Measure?
Key Components:
-
P Wave: Represents atrial contraction
-
QRS Complex: Shows ventricular contraction
-
T Wave: Indicates ventricular relaxation
Common Reasons for an ECG
- Chest pain investigation
- Heart rhythm abnormalities
- Heart attack diagnosis
- Pre-operative evaluation
- Routine health screening
The Procedure
Before the Test:
- No special preparation required
- Wear easily removable upper clothing
- Remove jewelry from neck and wrists
During the Test:
- You'll lie flat on an examination table
- Electrodes will be attached to your skin
- You'll need to lie still for about 5-10 minutes
- The machine will record your heart's activity
Safety and Comfort
- Completely painless procedure
- No electricity enters your body
- No radiation exposure
- Takes only a few minutes
Results and Follow-up
- Results are often available immediately
- Your healthcare provider will interpret the patterns
- May require additional tests based on findings
When to Seek Immediate Care
Contact your healthcare provider if you experience:
- Chest pain
- Irregular heartbeat
- Shortness of breath
- Dizziness or fainting
Additional Information
- Regular ECGs may be needed for monitoring certain conditions
- Keep records of your ECG results
- Discuss any concerns with your healthcare provider