Section All Flashcards
(49 cards)
-Graphy
Process of recording
-metry
Process of measurement
ECG
Is a record or recording of electrical impulses of the heart produce electrocardiograph
Echo
Uses ultrasonic waves to study the motion of the heart
Polarized state
When cardiac cells are resting
Depolarized state
Cardiac cells are recovering
Positive deflection
Upward movement away from baseline ecg tracing
P-wave
First wave in tracing represents atrial depolarization
PR segment
Appears as isoelectric created as impulse moves slowly. The av nod follows p wave and the time between end of atrial depolarization and the start of ventricular depolarization
QRS complex
Arterial polarization and ventricular depolarization
Resting 12 lead ecg uses
10 electrodes and lead wires
Right leg electrode
Is ground electrode
Lead 1
Uses right arm and left arm electrodes
Lead 2
Uses right arm and left leg electrodes
Artifact on leads 1 and 3
Should check left arm electrode
Artifact on leads 2 and 3
Check left leg electrode
Standard leads are
Created from measurement of current traveling from negative pole to positive pole
Augmented leads
Are considered unipolar leads and provide information on vertical and frontal plane of heart uses RA,LA, and LL
Precordial leads
Unipolar include v1-V6 if there is an artifact check the lead it’s on
Ecg thermal paper
Has special heat sensitive coding and tracing is burnt on paper
Super rapid heart beat like 150
Increase the chart speed
If tracing shows tall wave forms
Decrease gain or sensitivity
What is the default chart speed
25mm
Default gain or sensitivity
10mm/mV