Intro to Cardiac Monitoring

Question 1

Main groups of leads

Answer 1

Limb leads, precordial leads

Question 2

Automaticity

Answer 2

Ability to direct your own impulse
SA Node: 60-100 bpm
AV Junction: 40-60 bpm
Purkinje Fibers: 20-40 bpm

Question 3

Einthoven’s Triangle

Answer 3

Theory: Everytime the heart contracts, electrical energy is emitted
Lead 1: attached to right and left arms
Lead 2: attached to right arm and left leg
Lead 3: attached to left arm and left leg

Right to Left, Up to Down, negative to positive

Question 4

Lead Colors

Answer 4

Clouds/Grass, Smoke/Fire

White: RA
Green: RL

Black: LA
Red: LL

Question 5

ECG Paper

Answer 5

One 1mm box: 0.04 seconds
One large box: 0.20 seconds
25 1mm boxes =1 second