Introduction
Graphic representation of heart activity
electrocardiogram
Pumps blood from heart into aorta to distribute throughout body
left ventricle
____ wave is the contraction of the atria
P
________is considered ground wire
RL
Heart rate below 60
bradycardia
Blood enters from superior and inferior vena cava
right atrium
Knot of modified myocardium that initiates and regulates heartbeat
"pacemaker"
SA Node
________wave is the electrical recovery of ventricles
T
Conductor of electricity used to promote contact between body and ECG
electrodes
Extra beat come before next normal beat
PAC
Receives oxygenated blood from lungs
left atrium
Delays electrical impulse to allow complete contraction of the atria and filling of ventricles with blood from atria
AV Node
__________segment is the end of atrial depolarization to beginning of ventricular depolarization
PR
___________graphically records ECG images
output device
P waves appear "saw tooth"
atrial flutter
Electrocardiogram records ___________ of heart activity
10 seconds
Distribute electrical impulses to ventricles
purkinje fibers
_____________flat, horizontal line that represents the heart is at rest
baseline
____________leads include LEAD I, II, III
bipolar
Early beat with wide distorted QRS
PVC
Name 1 purpose of ECG
evaluate symptoms
detects dysrhythmias
detect ischemia
determine hypertrophy
Divides into right and left branches
Bundle of His
___________ interval is the beginning of ventricular depolarization to end of ventricular repolarization
QT interval
___________is at the horizontal level of V4 at left anterior axillary line
V5
V fib