EKG

What does the P Wave represent in the heart's electrical activity?

Depolarization of the atria.

What happens during the P Wave?

The atria contract, pushing blood into the ventricles.

When does the P Wave start?

When the electrical impulse is generated by the SA node and spreads through the atria.

What does the PR Interval represent?

The total time it takes for the electrical impulse to travel from the SA node to the Purkinje fibers.

What happens during the PR Interval?

The atria finish contracting and ventricles begin filling with blood.

What is the time duration of the PR Interval?

From the start of the P wave to the start of the QRS complex.

What does the PR Segment represent?

The period when the electrical impulse travels through the AV node.

What happens during the PR Segment?

The electrical impulse slows in the AV node, allowing the ventricles to fill with blood.

What is the time duration of the PR Segment?

The flat line between the end of the P wave and the beginning of the QRS complex.

What does the QRS Complex represent?

Depolarization of the ventricles.

What happens during the QRS Complex?

The ventricles contract, pumping blood to the lungs and the body.

What is the duration of the QRS Complex?

From the start of the Q wave to the end of the S wave.

What does the ST Segment represent?

The time during which the ventricular muscle cells remain depolarized.

What happens during the ST Segment?

The ventricles are in a resting phase after contraction.

What is the duration of the ST Segment?

From the end of the S wave to the start of the T wave.

What does the T Wave represent in the heart's activity?

Repolarization of the ventricles.

What happens during the T Wave?

Ventricles relax and return to their resting state in preparation for the next contraction.

What is the duration of the T Wave?

From the peak of the T wave to the end.

What does the QT Interval represent?

Total time it takes for the ventricles to depolarize and repolarize.

What heart actions are included in the QT Interval?

Both ventricular contraction (depolarization) and relaxation (repolarization).

What is the duration of the QT Interval?

From the start of the QRS complex to the end of the T wave.

What does the TP Segment represent?

Electrical inactivity between the end of ventricular repolarization and the beginning of the next atrial depolarization.

What happens during the TP Segment?

Both the atria and ventricles are relaxed and filling with blood.

What is the duration of the TP Segment?

The flat line between the end of the T wave and the start of the next P wave.