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BCIT ECG NSCC 7150 DYSRHYTHMIA
INTERPRETATION AND MANAGEMENT
MIDTERM EXAM 2025|ACTUAL
150QS&AS|A+GRADE
Why is the j-point significant? - ..........ANSWER.......it is an
important reference point when analyzing the ECG waveform for
signs of myocardial ischemia or injury (ST elevation and ST
depression)
What is the first thing you do when you notice a cardiac
dysrhythmia on your patients monitor ? -
..........ANSWER.......CHECK ON THE PATIENT!! (ABCs,
symptomatic?, call for help, etc.)
which wave/interval do you use for assessing atrial rhythm -
..........ANSWER.......P wave, P-P interval
which wave/interval do you use for assessing ventricular rhythm -
..........ANSWER.......R wave, R-R interval
Elitedocs
, 2|Page
how many seconds in variation is acceptable for regular rate
rhythms? - ..........ANSWER.......0.16s, or 10%
ST depression indicates - ..........ANSWER.......myocardial ischemia
ST elevation indicates - ..........ANSWER.......myocardial injury
what point of reference is used to examine the ST segment? -
..........ANSWER.......J point
ST depression or elevation of how many mm is considered
significant? - ..........ANSWER.......1 mm
What is sinus rhythm? - ..........ANSWER.......normal cardiac rhythm
normal rate of firing of the SA node is how many bpm? -
..........ANSWER.......60-100
Elitedocs
, 3|Page
what is sinus arrhythmia? - ..........ANSWER.......sinus arrhythmia is
normal waveform but the rate of firing is irregular
what is the cause of sinus arrhythmia? - ..........ANSWER.......due to
changes in intrathoracic pressure that occurs during respiratory
cycle- the HR increases as the pt breathes in and decreases as the
pt breathes out
T/F Sinus arrhythmia is not usually considered pathological? -
..........ANSWER.......TRUE
T/F - Sinus arrhythmia usually requires treatment -
..........ANSWER.......FALSE - usually does not require treatment
(HR can fluctuate between inhalation and exhalation)
Define bradycardia - ..........ANSWER.......heart rate less than 60
bpm
Elitedocs
, 4|Page
What is sinus bradycardia? - ..........ANSWER.......sinus bradycardia
is normal waveform but the rate of firing is too slow (< 60/min)
which medication is an option for tx of sinus brady? -
..........ANSWER.......atropine
When is sinus bradycardia normal? - ..........ANSWER.......in high
performance athletes, sleep or vagal maneuver
When is sinus bradycardia problematic? - ..........ANSWER.......when
cardiac output is compromised, too slow of HR can lead to
decrease in oxygen supply to the heart and cause damage- assess
pt!
what is sinus arrest/sinus pause - ..........ANSWER.......failure of the
SA node to form an impulse
Elitedocs
BCIT ECG NSCC 7150 DYSRHYTHMIA
INTERPRETATION AND MANAGEMENT
MIDTERM EXAM 2025|ACTUAL
150QS&AS|A+GRADE
Why is the j-point significant? - ..........ANSWER.......it is an
important reference point when analyzing the ECG waveform for
signs of myocardial ischemia or injury (ST elevation and ST
depression)
What is the first thing you do when you notice a cardiac
dysrhythmia on your patients monitor ? -
..........ANSWER.......CHECK ON THE PATIENT!! (ABCs,
symptomatic?, call for help, etc.)
which wave/interval do you use for assessing atrial rhythm -
..........ANSWER.......P wave, P-P interval
which wave/interval do you use for assessing ventricular rhythm -
..........ANSWER.......R wave, R-R interval
Elitedocs
, 2|Page
how many seconds in variation is acceptable for regular rate
rhythms? - ..........ANSWER.......0.16s, or 10%
ST depression indicates - ..........ANSWER.......myocardial ischemia
ST elevation indicates - ..........ANSWER.......myocardial injury
what point of reference is used to examine the ST segment? -
..........ANSWER.......J point
ST depression or elevation of how many mm is considered
significant? - ..........ANSWER.......1 mm
What is sinus rhythm? - ..........ANSWER.......normal cardiac rhythm
normal rate of firing of the SA node is how many bpm? -
..........ANSWER.......60-100
Elitedocs
, 3|Page
what is sinus arrhythmia? - ..........ANSWER.......sinus arrhythmia is
normal waveform but the rate of firing is irregular
what is the cause of sinus arrhythmia? - ..........ANSWER.......due to
changes in intrathoracic pressure that occurs during respiratory
cycle- the HR increases as the pt breathes in and decreases as the
pt breathes out
T/F Sinus arrhythmia is not usually considered pathological? -
..........ANSWER.......TRUE
T/F - Sinus arrhythmia usually requires treatment -
..........ANSWER.......FALSE - usually does not require treatment
(HR can fluctuate between inhalation and exhalation)
Define bradycardia - ..........ANSWER.......heart rate less than 60
bpm
Elitedocs
, 4|Page
What is sinus bradycardia? - ..........ANSWER.......sinus bradycardia
is normal waveform but the rate of firing is too slow (< 60/min)
which medication is an option for tx of sinus brady? -
..........ANSWER.......atropine
When is sinus bradycardia normal? - ..........ANSWER.......in high
performance athletes, sleep or vagal maneuver
When is sinus bradycardia problematic? - ..........ANSWER.......when
cardiac output is compromised, too slow of HR can lead to
decrease in oxygen supply to the heart and cause damage- assess
pt!
what is sinus arrest/sinus pause - ..........ANSWER.......failure of the
SA node to form an impulse
Elitedocs
