EKG – SHARP New Grad Program | 2025/2026
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endocardium - correct answer*inner* lining of the heart
myocardium - correct answer*middle* muscular layer of the heart
pericardium - correct answer*outer* membrane surrounding the heart
sinoatrial node (SA node) - correct answer- right upper atrium
- pacemaker cells (60-100bpm)
atrioventricular node (AV node) - correct answer- lower right upper atrium
- backup pacemaker (40-60bpm)
R-R interval - correct answer- peak of R wave to peak of next R wave
- interval can be measured to show regular or irregular rhythm
isoelectric line - correct answerbaseline of the ECG
ECG small square - correct answer0.04 seconds
ECG large square - correct answer0.20 seconds
ECG strip length - correct answer6 seconds
heart rate can be determined by...? - correct answereither...
- counting # of R waves in 6 sec strip and multiplying by 10
- counting # of small squares in an R interval and then (1500 / # = HR)
P wave - correct answer- first deflection
- depolarization of the atria
normal P wave - correct answer- smooth and rounded
- <2.5mm in height
abnormal P wave - correct answer- tall and peaked
- >2.5mm in height
PR interval - correct answer- P wave AND straight line that follows
, - measured from beginning of P wave until beginning of QRS complex
normal PR interval - correct answer0.12-0.20 seconds
abnormal PR interval - correct answer- PR interval <0.12 seconds (electrical impulse
bypasses AV node)
- PR interval >0.20 seconds (electrical impulse delayed from AV node)
-> can be associated w/ aging
QRS complex - correct answer- ventricular depolarization
- 0.04-0.10 seconds
ST segment - correct answer- end of ventricular depolarization
- from end of QRS complex to beginning of T wave
abnormal ST segment - correct answer- considered significant elevation if 1mm (1 small
box) deviation between waves (in 2+ leads in same area of heart)
- convex, concave, horizontal -> all considered "elevated" when deviation occurs
T wave - correct answerlatter phase of ventricular repolarization
QT interval - correct answer- onset of ventricular depolarization until end of
repolarization
- when normal is <half of R-R interval
- >half means repolarization taking long, heart is left vulnerable
U wave - correct answer- usually only visible if heart rate is slow
- often r/t hypokalemia
tele monitoring - correct answer3, 5, or 6 leads
tele monitoring - white lead - correct answer- right arm
- "clouds"
tele monitoring - green lead - correct answer- right leg
- "grass"
tele monitoring - black lead - correct answer- left arm
- "smoke"
tele monitoring - red lead - correct answer- left leg
- "fire"
tele monitoring - brown lead - correct answercenter chest
six steps to rhythm analysis - correct answer1. determine regularity
Updated Study Guide & Exam Prep | 100%
Pass Guarantee
endocardium - correct answer*inner* lining of the heart
myocardium - correct answer*middle* muscular layer of the heart
pericardium - correct answer*outer* membrane surrounding the heart
sinoatrial node (SA node) - correct answer- right upper atrium
- pacemaker cells (60-100bpm)
atrioventricular node (AV node) - correct answer- lower right upper atrium
- backup pacemaker (40-60bpm)
R-R interval - correct answer- peak of R wave to peak of next R wave
- interval can be measured to show regular or irregular rhythm
isoelectric line - correct answerbaseline of the ECG
ECG small square - correct answer0.04 seconds
ECG large square - correct answer0.20 seconds
ECG strip length - correct answer6 seconds
heart rate can be determined by...? - correct answereither...
- counting # of R waves in 6 sec strip and multiplying by 10
- counting # of small squares in an R interval and then (1500 / # = HR)
P wave - correct answer- first deflection
- depolarization of the atria
normal P wave - correct answer- smooth and rounded
- <2.5mm in height
abnormal P wave - correct answer- tall and peaked
- >2.5mm in height
PR interval - correct answer- P wave AND straight line that follows
, - measured from beginning of P wave until beginning of QRS complex
normal PR interval - correct answer0.12-0.20 seconds
abnormal PR interval - correct answer- PR interval <0.12 seconds (electrical impulse
bypasses AV node)
- PR interval >0.20 seconds (electrical impulse delayed from AV node)
-> can be associated w/ aging
QRS complex - correct answer- ventricular depolarization
- 0.04-0.10 seconds
ST segment - correct answer- end of ventricular depolarization
- from end of QRS complex to beginning of T wave
abnormal ST segment - correct answer- considered significant elevation if 1mm (1 small
box) deviation between waves (in 2+ leads in same area of heart)
- convex, concave, horizontal -> all considered "elevated" when deviation occurs
T wave - correct answerlatter phase of ventricular repolarization
QT interval - correct answer- onset of ventricular depolarization until end of
repolarization
- when normal is <half of R-R interval
- >half means repolarization taking long, heart is left vulnerable
U wave - correct answer- usually only visible if heart rate is slow
- often r/t hypokalemia
tele monitoring - correct answer3, 5, or 6 leads
tele monitoring - white lead - correct answer- right arm
- "clouds"
tele monitoring - green lead - correct answer- right leg
- "grass"
tele monitoring - black lead - correct answer- left arm
- "smoke"
tele monitoring - red lead - correct answer- left leg
- "fire"
tele monitoring - brown lead - correct answercenter chest
six steps to rhythm analysis - correct answer1. determine regularity
