BASICS
The EKG records the electrical activity of the heart using skin sensors called _____________
Electrodes
Do we record an EKG on a normal or semi-log graph paper
Normal graph paper
Normal sinus rhythm has what range of beats per minute
60-100
Name 1 of the 3 main types of irregular rhythms
wandering pacemaker, multi-focal atrial tachycardia, atrial fibrillation
There are 4 ways a patient can be paced: Permanent, transthoracic, transcutaneous and?
TRANSVENOUS
The ability of the SA node to generate pacemaking stimuli is known as
automaticity
How many lines are their between 2 bold black lines
5 lines
What foci is pacing the heart at 60-80 beats/min
atrial foci
In a-fib, do you see any R waves?
yes, but no P waves
In the 3-letter coding system the 2nd letter stands for this
CHAMBER SENSED
Name the order of the hearts electrical conduction system
SA node, AV node, Bundle of HIs, Rt and Lt bundle branches, purkinje fibers
How much time is between 2 bold black lines, referring to time in seconds
.2 seconds
What is pacing it at 40-60 beats/min? What about 20-40?
40-60-junctional foci, 20-40-ventricular foci
In a ventricular escape rhythm (PVC), there is a widened _ _ _ complex
QRS
This is what occurs when the pacemaker fires an impulse and the chamber contracts
CAPTURE
What part of the conduction system starts the ventricular conduction
Bundle of HIs
How much time is their between 2 thin lines
.04 seconds
What is heart rate?
the speed of the heartbeat measured by the number of contractions of the heart per minute.
What is a premature beat?
a beat earlier then expected
When a pacemaker is under-sensing you will see pacer spikes throughout this
INTRINSIC RHYTHM
What part of the heart cycle do we get a P wave
atrial depolarization
A standard EKG has 12 leads, 6 limb and 6 chest. Name 3 limb leads and 3 chest leads?
limbs-I,II,III, AVR, AVL, AVF chest-V1,V2,V3,V4,V5,V6
Normal heart rate?
60 and 100 beats
Explain a ventricular bigeminy
normal, pvc, normal, pvc, normal, pvc
Oversensing is when the pacemaker senses that there is intrinsic heart rhythm when actually there is not. Oversensing results in this
UNDERPACING