QRS complex
From Biocrawler, the free encyclopedia.
The QRS complex is a record of the movement of electrical impulses through the lower heart chambers (ventricles).
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 ST segment, and the T wave, and the QRS complex mentioned above.
The P wave is a record of the movement of electrical activity through the upper heart chambers (atria).
The ST segment usually 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 electrically and preparing for their next muscle contraction.
