Determining Cardiac Rates
Count the number of small boxes and divide into 1500
What is the small box method
Represents Atrial Depolarization
What is the P wave
Regular Rhythm
HR 60-100 bpm
1 P wave for each QRS
PRI .12-20 sec & constant
QRS .12 sec or less
QT less than .50 sec
What is Normal sinus rhythm
Horizontal lines on EKG graph paper measures this _____.
What is Time
.12 to .20 sec is the normal range for what part of an EKG tracing
What is the PRI
Count the number of large boxes and divide into 300
What is the large box method
Represents Ventricular Depolarization
What is the QRS complex
Regular Rhythm
HR- greater than 100 bpm
1 P wave for each QRS
PRI .12-20 sec & constant
QRS .12 sec or less
QT less than .50 sec
What is Sinus Tachycardia
Vertical lines on the EKG graph paper measure this _____.
What is Voltage
.12 sec or less is a normal measurement for what waveform on an EKG Tracing
What is the QRS complex
Count the number of QRS complexes in a six second strip & multiply by 10
What is the six second method
Represents Repolarization of the Ventricles
What is T wave
Irregular Rhythm
HR 60-100 bpm
1 P wave for each QRS
PRI .12-20 sec & constant
QRS .12 sec or less
QT less than .50 sec
What is Sinus Arrhythmia
.04 seconds on EKG graph paper is equivalent to this ___.
What is one small box
.50 seconds or less is a normal measurement for _____ on an EKG Tracing
What is the QT
This method of calculating the heart rate should only be used on irregular rhythms
What is the six second method
Represents the Delay at the AV Node
What is the PR segment
Breathing affects the heart rate of this type of sinus rhythm
What is Sinus Arrhythmia
.20 seconds on EKG graph paper is equivalent to this ___.
What is one large box
Has an inherent heart rate of 40-60 beats per minute
What is the AV Node
Has an inherent heart rate of 60-100 beats per minute
What is the SA Node
Encompasses the P Wave and the PR segment;should measure .12-.20 sec
What is the PRI
Regular Rhythm
HR- less than 60 bpm
1 P wave for each QRS
PRI .12-20 sec & constant
QRS .12 sec or less
QT less than .50 sec
What is Sinus Bradycardia
25mm/sec is the _____.
What is the paper speed
Has an inherent heart rate of 20-40 beats per minute
What the Purkinje Fibers/Ventricles