Cardiac Electrical Activity

Flashcards covering key terms related to cardiac electrical activity and phases of the heart's electrical cycle.

P-wave

Represents atrial depolarization in the cardiac cycle.

Atrial Depolarization

The initial phase of the heart's electrical cycle where the atria contract to push blood into the ventricles.

PR Segment

The time interval between the end of atrial depolarization and the start of ventricular depolarization.

QRS Complex

Represents the depolarization of the ventricles and is a key component of the ECG.

Isoelectric Line

Represents a state of no electrical activity during the cardiac cycle.

T-wave

Represents ventricular repolarization, the process of the ventricles resetting electrically.

Ventricular Depolarization

The phase in which the ventricles contract to pump blood out of the heart.

Ventricular Repolarization

The phase of the cardiac cycle when the ventricles recover from depolarization.