Electrocardiogram (ECG) Basics

Front

P wave

Back

An integral part of an electrocardiogram (ECG) representing the electrical depolarization of the atria of the heart.

Front

P wave

Back

Typically a small positive deflection from the isoelectric baseline that occurs just before the QRS complex.

Front

T wave

Back

represents ventricular repolarization, which is the period when the heart's ventricles are repolarizing.

Front

Repolarization

Back

the period when the heart's ventricles are repolarizing

Front

QRS Complex

Back

a waveform on an electrocardiogram (ECG) that represents the electrical activity of the heart's ventricles depolarizing

Front

Asystole

Back

when your heart's electrical system fails, causing your heart to stop pumping

Front

Sinoatrial Node

Back

also known as the sinus node, is the heart's natural pacemaker that controls the heart rate

Front

Atrioventricular Node

Back

a small, specialized nerve in the heart that connects the electrical systems of the atria and ventricles.

Front

Atrioventricular Node

Back

It's located in the right atrium, near the coronary sinus, in an area known as the triangle of Koch.

Front

Aortic Valve

Back

controls blood flow from the left ventricle to the aorta, the body's main artery.