BSMH Advanced Arrhythmia Course
Exam | Bon Secours Mercy Health
Nursing Education|| LATEST UPDATE
2026/27
blood flow from body through the heart
superior and inferior vena cava > right atrium > tricuspid valve > right ventricle >
pulmonic valve > pulmonary artery > lungs > pulmonary veins > left atrium > mitral valve
> left ventricle > aortic valve > aorta > body
SA node bpm
60-100
AV node bpm
40-60
purkinje fibers bpm
20-40
ekg paper: small square = ________ second
0.04
ekg paper: small square = _____ mm
1
ekg paper: larger square = ________ second
0.20
ekg paper: larger square = ______ mm
5
, how is voltage measured on an ekg strip?
along the vertical axis; 10 mm is 1 MV
15 larger boxes is how many seconds?
3
30 larger boxes is how many seconds?
6
what does the P wave show?
atrial depolarization (contraction); indicates the impulse originated in the SA node, atria,
or AV junction
P wave characteristics
1st waveform on tracing, normally smooth and rounded, upright in lead 2, precedes
QRS
PR interval
0.12-0.20 seconds measured from beginning of P to beginning of QRS
what does a PR interval longer than 0.20 imply?
heart block
what does the QRS complex show?
ventricular depolarization and atrial repolarization
what is bundle branch block?
obstruction in one of the branches of the bundle of his so the QRS is wider and more
than 0.12 seconds
nurse actions for a bundle branch block
Exam | Bon Secours Mercy Health
Nursing Education|| LATEST UPDATE
2026/27
blood flow from body through the heart
superior and inferior vena cava > right atrium > tricuspid valve > right ventricle >
pulmonic valve > pulmonary artery > lungs > pulmonary veins > left atrium > mitral valve
> left ventricle > aortic valve > aorta > body
SA node bpm
60-100
AV node bpm
40-60
purkinje fibers bpm
20-40
ekg paper: small square = ________ second
0.04
ekg paper: small square = _____ mm
1
ekg paper: larger square = ________ second
0.20
ekg paper: larger square = ______ mm
5
, how is voltage measured on an ekg strip?
along the vertical axis; 10 mm is 1 MV
15 larger boxes is how many seconds?
3
30 larger boxes is how many seconds?
6
what does the P wave show?
atrial depolarization (contraction); indicates the impulse originated in the SA node, atria,
or AV junction
P wave characteristics
1st waveform on tracing, normally smooth and rounded, upright in lead 2, precedes
QRS
PR interval
0.12-0.20 seconds measured from beginning of P to beginning of QRS
what does a PR interval longer than 0.20 imply?
heart block
what does the QRS complex show?
ventricular depolarization and atrial repolarization
what is bundle branch block?
obstruction in one of the branches of the bundle of his so the QRS is wider and more
than 0.12 seconds
nurse actions for a bundle branch block
