EKG and cardiovascular testing module Flashcards
1
Q
artifacts
A
- unwanted external event occuring in an EKG tracing not associated with the heart function
2
Q
limb leads
A
- white: right arm
- black: left arm
- green: right leg
- red: right leg
3
Q
precordial leads
A
- v1: red, right side of the chest, fourth intercostal space
- v2: yellow, left side of the chest, fourth intercostal space
- v4: blue, left side of the chest, fifth intercostal space, midclavicular line
- v3: green, left side of the chest, in between v2 and v4
- v5: orange, left side of the chest, fifth intercostal space, anterior axillary line
- v6: purple, left side of the chest, fifth intercostal space, midaxillary line
4
Q
p wave
A
- represents atrial depolarization or contraction
5
Q
QRS wave
A
- represents ventricular depolarization
6
Q
t wave
A
- represents ventricular repolarization or relaxation
7
Q
u wave
A
- not always visible
- represents a repolarization of the bundle of His and Purkinje fibers
8
Q
P-R interval
A
- represents the time it takes from the beginning of atrial depolarization to the beginning of ventricular depolarization
9
Q
QT interval
A
- represents the time it takes from the beginning of ventricular depolarization to the end of ventricular repolarization
10
Q
ST segment
A
- represents the time from the end of ventricular depolarization to the beginning of ventricular repolarization
11
Q
somatic tremor
A
- irregular spikes throughout the tracing
- related to muscle movement
- if patient is chilled, parkinson’s disease
12
Q
AC interference
A
- regular spikes in the EKG tracing
- related to poor grounding or external electricity interfering with the tracing
- lights, computers, and crossed lead wires
13
Q
wandering baseline
A
- results from poor electrode connection
- can be associated with lotions, oils, or powders on the skin
- baseline will wander away from the center of the paper, causing difficulty in tracing interpretation
14
Q
interrupted baseline
A
- obvious when there is a break in the tracing
- usually related to a disconnected or broken lead wire
15
Q
sinus bradycardia
A
- a normal EKG tracing of a heart rate less than 60/min