Fucking Waves
What is the P Wave
Atrial depolarization with resulting atrial contraction.
What does the QRS represent?
Ventricular depolarization, ventricular contraction; atrial repolarization occuring.
T Wave
Ventricular repolarization
U Wave
Repolarization of the Purkinje fibers; electrolyte imbalances
PR Interval
Beginning of atrial depolarization to the beginning of ventricular depolarization.
QT Wave
Period of time from the start of ventricular depolarization to the end of ventricular repolarization
ST segment
Time between ventricular depolarization and the beginning of ventricular repolarization
What is gain?
Regulates the output or height of the EKG waveform
What is the standard setting of gain?
5mm/mV
If heart rate is elevated what gain setting should it be set on?
20mm/mV
What is speed?
Regulates how fast or slow the paper or data runs during ECG procedure.
What is the standard setting of speed?
25 mm/sec
If patient has unsual rapid heart rate, what should the speed be changed to?
50 mm/sec
What should you do when you do change the settings other than the standard?
Notify the provider who will interpret the tracing.
Note this on the EKG tracing
If the rhythm is regular, whtat method should you use?
1500 method
300 method
What is PAC?
Premature atrial complexes
PAC is a early electrical impulses that originate in the atria
True
What is the J point?
Junction occuring at the end of the QRS complex and the beginning of the ST interval
What does J point represent?
The end of the QRS complex and ventricular depolarization
What is the location of Lead I?
Right arm & Left arm
Where is the location of Lead II?
Right arm & left leg
Where is the location of Lead III?
Left arm & left leg
Where should the aVR be located?
Right arm
Where should the aVL be located?
Left arm
Where should the aVF be located?
Left leg
Location of V1
Right sternum, 4th intercostal
Location of V2
Left sternum, 4th intercostal
Location of V3
Midway between V2 and V4
Location of V4
Midclavicular line, 5th intercostal space
Location of V5
In line with V4 at anterior axillary line
Location of V6
In line with V4 and V5 at mid-axillary line
What is sinus block?
Failure of the signal to exit the SA node ("blocked" signal). Pause that is direct multiple of the underlying rhythm.
What is sinus arrest?
Total failure of the SA node to generate a signal, which causes random-length of pause.