Cardiac Conduction and Heart Conditions

Vocabulary review covering electrocardiogram components, heart rate abnormalities, and cardiac disorders based on the Anatomy & Physiology Coloring Workbook.

Electrocardiogram

A recording of the electrical activity of the heart.

P wave

The period during which the atria are depolarizing.

T wave

The period during which the ventricles are repolarizing.

QRS wave

The period during which the ventricles are depolarizing, which precedes their contraction.

Bradycardia

An abnormally slow heartbeat, that is, below $60$ beats per minute.

Fibrillation

A condition in which the heart is uncoordinated and useless as a pump.

Tachycardia

An abnormally rapid heartbeat, that is, over $100$ beats per minute.

Heart block

Damage to the AV node, totally or partially releasing the ventricles from the control of the sinoatrial (SA) node.

Angina pectoris

Chest pain, resulting from ischemia of the myocardium.