CAMC EKG Exam Questions & Answers
2024/2025
If you have a regular rhythm how do you find heart rate - ANSWERS1500 divided by # of small blocks in
the RR interval.
If the heart rate is regular how do you do the r-rsec - ANSWERS# 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 - ANSWERSCount number of QRSs and
add 0 = ___ bpm
How do you find PRI - ANSWERSCount # if small blocks from start of P to start of QRS x 0.04
How do you find QRS - ANSWERSCount # of small blocks from start of QRS to end of QRS x 0.04
How do you find QT - ANSWERSCount # of small blocks from start of QRS to where the T wave returns to
isoelectric line x 0.04
How do you find QTc - ANSWERSQT divided by square root of R-Rsecs
Escape - ANSWERSA higher pacemaker site does not create an impulse so a lower pacemaker site takes
over.
Irritability - ANSWERSThis is a cause of premature beats
Pacemaker rule - ANSWERSThe pacemaker site firing the fastest controls the heart rate
Inherent rate - ANSWERSNatural rate of a pacemaker
, Automaticity - ANSWERSThe ability of the heart to initiate an impulse without outside stimulation
What represents polarization ? - ANSWERSIsoelectric line
What represents atrial depolarization - ANSWERSP wave
What represents the delay in the Av node - ANSWERSPr segment
What represents ventricular depolarization - ANSWERSQRS complex
What represents ventricular repolarization - ANSWERST wave
Heart range for SA node - ANSWERS60-100
Heart range for AV junction - ANSWERS40-60
Heart range for ventricle (purkinje fibers) - ANSWERS20-40
Conduction system in order - ANSWERSSA node
Bachman bundle
Internodal tracts
AV node
AV junction
Bundle of HIS
L&R bundle branches
Purkinje fibers
2024/2025
If you have a regular rhythm how do you find heart rate - ANSWERS1500 divided by # of small blocks in
the RR interval.
If the heart rate is regular how do you do the r-rsec - ANSWERS# 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 - ANSWERSCount number of QRSs and
add 0 = ___ bpm
How do you find PRI - ANSWERSCount # if small blocks from start of P to start of QRS x 0.04
How do you find QRS - ANSWERSCount # of small blocks from start of QRS to end of QRS x 0.04
How do you find QT - ANSWERSCount # of small blocks from start of QRS to where the T wave returns to
isoelectric line x 0.04
How do you find QTc - ANSWERSQT divided by square root of R-Rsecs
Escape - ANSWERSA higher pacemaker site does not create an impulse so a lower pacemaker site takes
over.
Irritability - ANSWERSThis is a cause of premature beats
Pacemaker rule - ANSWERSThe pacemaker site firing the fastest controls the heart rate
Inherent rate - ANSWERSNatural rate of a pacemaker
, Automaticity - ANSWERSThe ability of the heart to initiate an impulse without outside stimulation
What represents polarization ? - ANSWERSIsoelectric line
What represents atrial depolarization - ANSWERSP wave
What represents the delay in the Av node - ANSWERSPr segment
What represents ventricular depolarization - ANSWERSQRS complex
What represents ventricular repolarization - ANSWERST wave
Heart range for SA node - ANSWERS60-100
Heart range for AV junction - ANSWERS40-60
Heart range for ventricle (purkinje fibers) - ANSWERS20-40
Conduction system in order - ANSWERSSA node
Bachman bundle
Internodal tracts
AV node
AV junction
Bundle of HIS
L&R bundle branches
Purkinje fibers
