ECG

ECG Test – Electrocardiogram for Heart Health

An ECG test (electrocardiogram) is a quick, non-invasive test that records the electrical activity of the heart. It provides information about the heart rate, rhythm and electrical signals produced during each heartbeat. An ECG is commonly used as part of the evaluation of symptoms such as chest discomfort, palpitations, dizziness, shortness of breath and an unusually fast or irregular heartbeat.

At Siris Healthcare, ECG testing can form an important part of a comprehensive cardiac evaluation when recommended by a qualified healthcare professional. The test itself is generally quick and painless, with small electrodes placed on the skin to record the heart's electrical signals.

What Is an ECG Test?

An electrocardiogram (ECG or EKG) records the electrical activity that controls the heartbeat. During a standard ECG, small adhesive electrodes are placed on the chest and, depending on the test, the arms or legs. These electrodes detect electrical signals from the heart, which are displayed or printed as wave patterns for clinical interpretation.

An ECG can help healthcare professionals assess whether the heart is beating too quickly, too slowly or irregularly. It may also provide clues that support the evaluation of conditions such as arrhythmias, heart attack, coronary artery disease and certain other heart conditions.

Why Is an ECG Test Done?

A doctor may recommend an ECG test for the heart when there are symptoms or medical factors that require evaluation of cardiac electrical activity.

An ECG may be recommended for people experiencing:

• Chest pain or discomfort
• Heart palpitations or a feeling of skipped beats
• Dizziness or lightheadedness
• Shortness of breath
• An unusually fast or slow heartbeat
• Weakness or unusual fatigue
• Symptoms that may suggest an irregular heart rhythm

An ECG may also be used to monitor an existing heart condition, evaluate certain treatments or check how a pacemaker is functioning.

What Does an ECG Test Detect?

An ECG provides information about the electrical activity of the heart and can help identify patterns that may require further evaluation.

Depending on the circumstances, an ECG may help healthcare professionals assess:

Heart Rate

An ECG can show how fast or slowly the heart is beating. This can help identify unusually fast heart rates, known as tachycardia, or unusually slow heart rates, known as bradycardia.

Heart Rhythm

The test can show whether the heartbeat follows a regular pattern or whether there are signs of an irregular heart rhythm, including certain types of arrhythmia.

Signs of Heart Attack

An ECG can help healthcare professionals identify electrical patterns associated with a current or previous heart attack. In an emergency setting, it is one of the tests that may be used when a heart attack is suspected.

Other Cardiac Abnormalities

ECG findings may provide clues about certain structural or electrical abnormalities of the heart. Depending on the findings and the patient's symptoms, additional investigations may be recommended.

How Is an ECG Test Performed?

A standard ECG test procedure is relatively simple.

You will usually lie comfortably on an examination table while a healthcare professional places small adhesive electrodes on the appropriate areas of your skin. Wires connected to the electrodes transmit the heart's electrical signals to the ECG machine.

During the recording, you may be asked to remain still and avoid talking because movement can interfere with the recording. The machine then produces an ECG tracing showing the electrical activity of the heart.

A standard ECG is generally completed quickly, although the overall appointment time can vary depending on the clinical situation and whether additional tests are required.

How Should You Prepare for an ECG?

A routine ECG generally does not require complicated preparation. However, a few simple steps can make the test easier.

Before an ECG examination:

• Wear clothing that allows easy access to the chest and, when necessary, the arms or legs.
• Avoid applying lotions, oils or powders to the skin where electrodes may be placed.
• Inform the healthcare professional about medicines and supplements you are taking.
• Follow any specific instructions provided by your doctor or healthcare team. 

Preparation may be different for an exercise ECG or stress test, so always follow the instructions given for the particular test you have been scheduled for.

Is an ECG Test Painful?

An ECG is generally painless and non-invasive. The electrodes record electrical signals from the heart; they do not send electricity into the body. Some people may experience minor discomfort when adhesive electrodes are removed, particularly if the skin is sensitive.

Are There Different Types of ECG Tests?

A standard resting ECG is only one form of electrocardiographic monitoring.

Depending on symptoms and the doctor's assessment, other forms may include:

Resting ECG

A resting ECG records the heart's electrical activity while you are lying still. It is commonly used for an initial assessment of heart rate and rhythm.

Exercise ECG or Stress Test

An exercise ECG records the heart's electrical activity while you exercise, usually by walking on a treadmill or cycling on a stationary bike. It may be used when a healthcare professional needs to assess how the heart responds to physical activity.

Holter Monitoring

If symptoms such as palpitations occur intermittently, a short resting ECG may not capture the abnormal rhythm. A Holter monitor is a portable ECG device that can record heart activity continuously for a longer period while you go about your usual activities.

Understanding Your ECG Results

An ECG report contains waveforms representing the electrical activity of the heart. A healthcare professional interprets these patterns along with your symptoms, medical history and other clinical information.

An ECG may provide information about:

• Heart rate
• Heart rhythm
• Electrical conduction through the heart
• Possible signs of certain heart abnormalities
• Patterns that may require further cardiac evaluation

An ECG result should not be interpreted in isolation. An abnormal ECG does not automatically identify one specific disease, and a normal ECG does not necessarily rule out every possible heart problem. Depending on your symptoms and clinical assessment, your doctor may recommend additional tests such as an echocardiogram, blood tests or longer-term heart monitoring.

When Should You Consider an ECG?

If you experience persistent or unexplained chest pain, palpitations, dizziness, shortness of breath, fainting or an unusual heartbeat, speak with a qualified healthcare professional about whether an ECG or another cardiac test is appropriate.

If severe or sudden chest pain, significant breathing difficulty, fainting or other symptoms suggesting a possible heart attack occur, seek urgent medical attention rather than waiting for a routine diagnostic appointment.

ECG Test at Siris Healthcare

An ECG can be a valuable part of evaluating heart rhythm and electrical activity when clinically indicated. Siris Healthcare provides access to diagnostic healthcare services designed to support timely evaluation and informed medical decision-making.

If an ECG has been recommended for you, follow the instructions provided by your healthcare professional and discuss your symptoms, medical history and current medicines before the test. ECG results should always be interpreted by a qualified healthcare professional in the context of your overall health.