Francais | English | Espanõl

From Wikipedia, the free encyclopedia

Electrocardiography (EKG, ECG) tracings show a characteristic pattern of electrical impulses that are generated by the heart. The QRS complex is a record of the measurement of the movement of electrical impulses through the lower heart chambers (ventricles), primarily in the Purkinje fibers.

[edit] Related waves/segments

• The P wave is a record of the movement of electrical activity through the upper heart chambers (Atrium anatomyatria).

• The ST segment usually appears as a straight, level line between the QRS complex and the T wave. Elevated or depressed ST segments may mean the heart muscle is damaged or not receiving enough blood, a sign that a myocardial infarction may have occurred. However, this is not considered a reliable method of diagnosis, and is often interpreted as being non-specific.

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

[edit] See also

• Electrical conduction system of the heart
• Hyperkalemia

[edit] External links

• Dictionary at eMedicine QRS+complexfr:QRS

pl:Zespół QRS