Perfusion - Electrophysiology

P-Wave

atrial depolarization

PR Interval

The time from the start of the P Wave to the Start of the QRS

QRS Complex

ventricular depolarization

ST segment

The area between ventricular depolarization and repolarization where there is no electrical activity.

T wave

ventricular repolarization

QT interval

beginning of QRS to end of T wave

Sinoatrial Node

Electrical impulses begin here

atrioventricular node

slows impulse from SA node before entering ventricle

Bundle of His

Electrical pathway from the atria to the ventricles

Bundle Branches

Carry current through the ventricular septum and muscle walls

Purkinje fibers

Delivers current to cardiac cells within the ventricle

normal rate for sinus node

60-100

normal rate for the AV node

40-60

normal rate for the purkinje fibers

20-40

normal measurement for the PR Interval

0.12-0.20

normal measurement for QRS complex

0.06-0.11

normal measurement for QT interval

0.36-0.44

atrial fibrillation

sinus arrhythmia

ventricular fibrillation

ventricular tachycardia

NSR with isolated PVC

sinus bradycardia

sinus tachycardia