EKG lead placement
left side of the chest, fifth intercostal space, midclavicular line (blue)
What is placement of V4 precordial lead?
dysrhythmia characterized by a heart rate less than 60/min
Represents atrial depolarization, contraction of the atria.
What is P wave?
irregular spikes throughout the tracing and is related to muscle movement. For example, shivering
What is somatic tremor?
the standard EKG paper speed
25mm/sec
What are limb lead placements
dysrhythmia with a heart rate greater than 100/min and one P wave preceding each QRS complex.
What is sinus tachycardia?
Represents ventricular repolarization, relaxation of the ventricles.
What is T wave?
movement associated with breathing or poor electrode connection. The baseline will wander away from the center of the paper
What is wandering baseline?
device patients will wear for 24 to 72 hours, based on the provider’s orders.
What is a Holter monitor?
left side of the chest, midway between V2 and V4 (green)
What is the placement of V3 precordial lead?
rapid, disorganized firing of multiple sites within the atrial tissue. This results in lots of fibrillatory waves between QRS complexes. It also results in an irregular QRS rhythm
What is atrial fibrillation?
Represents ventricular depolarization, contraction of the ventricles. (Atrial repolarization is not visible but occurs during this phase.)
What is QRS wave?
when there is a break in the tracing. It is usually related to a disconnected or broken lead wire.
What is an interrupted baseline?
speed at which the EKG paper comes out of the machine
What is paper speed?
left side of the chest, fifth intercostal space, midaxillary line (purple)
What is V6 placement of precordial lead?
regular, fast rhythm characterized by large, irregular, wide QRS complexes on the EKG. Typically, P waves are absent, not visible, or occur randomly
What is ventricular tachycardia?
Represents the time from the beginning of atrial depolarization to the beginning of ventricular depolarization.
What is PR interval?
characterized by regular spikes in the EKG tracing. It is related to poor grounding or external electricity interfering with the tracing
What is AC interference or 60-cycle interference?
refers to the amplitude or height of the EKG waves
What is the gain?
Lead I, lead II and lead III
What are Bipolar leads?
complete absence of any waves on the EKG tracing
What is asystole?
Represents the time from the beginning of ventricular depolarization to the end of ventricular repolarization.
Alteration or interference on the EKG that is not related to cardiac electrical activity; appears as distorted lines or waves.
What is artifact?
a test monitoring the heart during exercise on a treadmill or stationary bike to evaluate how the heart responds to stress.