If you have a regular rhythm how do you find heart rate - ANSWER 1500 divided
by # of small blocks in the RR interval.
If the heart rate is regular how do you do the r-rsec - ANSWER # small blocks
from R-R interval x 0.04 and then hit square root button
If you have an irregular rhythm how do you find the heart rate - ANSWER Count
number of QRSs and add 0 = ___ bpm
How do you find PRI - ANSWER Count # if small blocks from start of P to start of
QRS x 0.04
How do you find QRS - ANSWER Count # of small blocks from start of QRS to end
of QRS x 0.04
How do you find QT - ANSWER Count # of small blocks from start of QRS to
where the T wave returns to isoelectric line x 0.04
Automaticity - ANSWER The ability of the heart to initiate an impulse without
outside stimulation
What represents polarization ? - ANSWER Isoelectric line
What represents atrial depolarization - ANSWER P wave
What represents the delay in the Av node - ANSWER Pr segment
What represents ventricular depolarization - ANSWER QRS complex What
represents ventricular repolarization - ANSWER T wave
Heart range for SA node - ANSWER 60-100
Heart range for AV junction - ANSWER 40-60
, Heart range for ventricle (purkinje fibers) - ANSWER 20-40
How do you find QTc - ANSWER QT divided by square root of R-Rsecs
Escape - ANSWER A higher pacemaker site does not create an impulse so a
lower pacemaker site takes over.
Irritability - ANSWER This is a cause of premature beats
Pacemaker rule - ANSWER The pacemaker site firing the fastest controls the
heart rate
Inherent rate - ANSWER Natural rate of a pacemaker
Conduction system in order - ANSWER SA node
Bachman bundle
Internodal tracts
AV node
AV junction
Bundle of HIS
L&R bundle branches
Purkinje fibers
True or false : An impulse traveling towards a negative electrode produces a
negative waveform - ANSWER True
True or false : The preferred lead at CAMC is lead ll - ANSWER True
Describe sinus rhythm - ANSWER Regularity: regular
Rate: 60-100
Square root of R-Rsecs: yes
P waves: upward , 1:1 , same
PRI: .12-.20
QRS: .12 or less
QT: yes
QTC: yes
Describe sinus Brady - ANSWER Regularity: regular
Rate: 60 or below
by # of small blocks in the RR interval.
If the heart rate is regular how do you do the r-rsec - ANSWER # small blocks
from R-R interval x 0.04 and then hit square root button
If you have an irregular rhythm how do you find the heart rate - ANSWER Count
number of QRSs and add 0 = ___ bpm
How do you find PRI - ANSWER Count # if small blocks from start of P to start of
QRS x 0.04
How do you find QRS - ANSWER Count # of small blocks from start of QRS to end
of QRS x 0.04
How do you find QT - ANSWER Count # of small blocks from start of QRS to
where the T wave returns to isoelectric line x 0.04
Automaticity - ANSWER The ability of the heart to initiate an impulse without
outside stimulation
What represents polarization ? - ANSWER Isoelectric line
What represents atrial depolarization - ANSWER P wave
What represents the delay in the Av node - ANSWER Pr segment
What represents ventricular depolarization - ANSWER QRS complex What
represents ventricular repolarization - ANSWER T wave
Heart range for SA node - ANSWER 60-100
Heart range for AV junction - ANSWER 40-60
, Heart range for ventricle (purkinje fibers) - ANSWER 20-40
How do you find QTc - ANSWER QT divided by square root of R-Rsecs
Escape - ANSWER A higher pacemaker site does not create an impulse so a
lower pacemaker site takes over.
Irritability - ANSWER This is a cause of premature beats
Pacemaker rule - ANSWER The pacemaker site firing the fastest controls the
heart rate
Inherent rate - ANSWER Natural rate of a pacemaker
Conduction system in order - ANSWER SA node
Bachman bundle
Internodal tracts
AV node
AV junction
Bundle of HIS
L&R bundle branches
Purkinje fibers
True or false : An impulse traveling towards a negative electrode produces a
negative waveform - ANSWER True
True or false : The preferred lead at CAMC is lead ll - ANSWER True
Describe sinus rhythm - ANSWER Regularity: regular
Rate: 60-100
Square root of R-Rsecs: yes
P waves: upward , 1:1 , same
PRI: .12-.20
QRS: .12 or less
QT: yes
QTC: yes
Describe sinus Brady - ANSWER Regularity: regular
Rate: 60 or below
