Mercy Health Arrhythmia Exam Review Questions and Answers 2026/2027 |
A+ Grade Cardiac Rhythm Study Guide
What is the normal time of a PR interval? - (answer)0.12-0.2 seconds
What is the normal time of a QRS interval? - (answer)0.04-0.12 seconds
How do you tell if a QT interval is prolonged? - (answer)Draw a line between the R-R interval. If the T
wave ends AFTER this line, it is prolonged.
Definition of depolarization - (answer)contraction, reaching electrical threshold to initiate a response
Definition of repolarization - (answer)relaxation, storing energy
Does an EKG show you the electrical, mechanical, or electrical/mechanical activity of the heart? -
(answer)Electrical
How to count bpm on EKG? - (answer)1500/ # mini blocks between R-R = bpm
SA node inherent rate? - (answer)60-100 bpm
AV node inherent rate? - (answer)40-60 bpm
Ventricular inherent rate? - (answer)20-40 bpm; QRS will be wide
Causes of sinus bradycardia? - (answer)Vagal stimulation
MI
hypoxia
Digitalis Tox
Athlete
, Mercy Health Arrhythmia Exam Review Questions and Answers 2026/2027 |
A+ Grade Cardiac Rhythm Study Guide
Sinus bradycardia tx? - (answer)IF SYMPTOMATIC...
atropine
pacemaker
Sinus tachycardia causes? - (answer)Atropine
Emotions
PE
MI
CHF
Fever
Sinus tachycardia tx? - (answer)Beta Blockers; "-olol"
Sinus Arrhythmia defining features - (answer)Rate: faster w/ inspiration, slower w/ expiration
Regularity: irregular, longest R-R exceeds shortest by >/=0.16
Common cause of sinus arrhythmia? - (answer)Sleep apnea
What is the difference between sinus arrest and sinus exit block? - (answer)A sinus arrest pause is
IRREGULAR while a sinus exit block is REGULAR. Irregular means the pause is not the length of the usual
R-R interval meanwhile, a sinus exit block pause IS the same length as one or more R-R intervals.
When to notify the provider of a sinus arrest? - (answer)STAT if the arrest is >/= 3 seconds
Causes of PJCs/PACs/PVCs and SVT? - (answer)Stimulants (caffeine, tobacco, meds), hypoxia, heart
disease
A+ Grade Cardiac Rhythm Study Guide
What is the normal time of a PR interval? - (answer)0.12-0.2 seconds
What is the normal time of a QRS interval? - (answer)0.04-0.12 seconds
How do you tell if a QT interval is prolonged? - (answer)Draw a line between the R-R interval. If the T
wave ends AFTER this line, it is prolonged.
Definition of depolarization - (answer)contraction, reaching electrical threshold to initiate a response
Definition of repolarization - (answer)relaxation, storing energy
Does an EKG show you the electrical, mechanical, or electrical/mechanical activity of the heart? -
(answer)Electrical
How to count bpm on EKG? - (answer)1500/ # mini blocks between R-R = bpm
SA node inherent rate? - (answer)60-100 bpm
AV node inherent rate? - (answer)40-60 bpm
Ventricular inherent rate? - (answer)20-40 bpm; QRS will be wide
Causes of sinus bradycardia? - (answer)Vagal stimulation
MI
hypoxia
Digitalis Tox
Athlete
, Mercy Health Arrhythmia Exam Review Questions and Answers 2026/2027 |
A+ Grade Cardiac Rhythm Study Guide
Sinus bradycardia tx? - (answer)IF SYMPTOMATIC...
atropine
pacemaker
Sinus tachycardia causes? - (answer)Atropine
Emotions
PE
MI
CHF
Fever
Sinus tachycardia tx? - (answer)Beta Blockers; "-olol"
Sinus Arrhythmia defining features - (answer)Rate: faster w/ inspiration, slower w/ expiration
Regularity: irregular, longest R-R exceeds shortest by >/=0.16
Common cause of sinus arrhythmia? - (answer)Sleep apnea
What is the difference between sinus arrest and sinus exit block? - (answer)A sinus arrest pause is
IRREGULAR while a sinus exit block is REGULAR. Irregular means the pause is not the length of the usual
R-R interval meanwhile, a sinus exit block pause IS the same length as one or more R-R intervals.
When to notify the provider of a sinus arrest? - (answer)STAT if the arrest is >/= 3 seconds
Causes of PJCs/PACs/PVCs and SVT? - (answer)Stimulants (caffeine, tobacco, meds), hypoxia, heart
disease
