Electrocardiogram, EKG or ECG:

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Electrocardiogram, EKG or ECG:  

An EKG is part of the initial evaluation of a patient who is suspected to have a heart related problem. Small sticky electrodes are applied to the patient's chest, arms and legs. Wires are used to connect the patient to an EKG machine. A technician records the EKG. The electrical activity created by the patient's heart is processed by the EKG machine and then printed on a special graph paper. This is then interpreted by physician. It takes a few minutes to apply the EKG electrodes, and one minute to make the actual recording. The EKG is extremely safe and there is no risk involved.


Electrocardiography (EKG, ECG) tracings show a characteristic pattern of electrical impulses that are generated by the heart. The different parts of an EKG tracing of a heartbeat are called the P wave, the QRS complex, the ST segment, and the T wave.

  • The P wave is a record of the movement of electrical activity through the upper heart chambers (the atria) and is recorded when they contract.

  • The QRS complex is a record of the movement of electrical impulses through the lower heart chambers (the ventricles) and is recorded when they contract.

  • The ST segment appears as a straight, level line between the QRS complex and the T wave. Elevated or lowered ST segments may mean the heart muscle is damaged or not receiving enough blood.

  • The T wave corresponds to the period when the lower heart chambers are relaxing and preparing for their next muscle contraction.


   The EKG can provide important information about the patient's heart rhythm, a previous heart attack, increased thickness of heart muscle, and signs of decreased oxygen delivery to the heart, and problems with conduction of the electrical current from one portion of the heart to another.

 It is important to remember that EKGs are not 100% accurate. Normal recordings can be obtained in patients with significant heart disease, or some "abnormalities" may exist in the presence of a normal heart. 

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