NURS 205 EXAM 1QUESTIONS AND
CORRECT ANSWERS
*what is the problem with 1st and 3rd degree heart block* ✅✅correct answ-1st degree = PR
CONSTANTLY greater than 0.20 seconds (electrical signals that pass from the atria to the ventricles
of the heart are delayed)
3rd degree = conduction disassociated from each other (electrical signals from the atria (upper
chambers of the heart) completely fail to reach the ventricles (lower chambers), causing the atria
and ventricles to beat independently, resulting in a very slow heart rate and potentially inadequate
blood flow throughout the body)
treatment for 1st and 3rd degree heart block ✅✅correct answ-1st = monitor
3rd = pacemaker
what does 3rd degree heart block look like ✅✅correct answ-
heart block poem for 1st and 3rd degree HB ✅✅correct answ-1st: if the R is far from the P, then
you have a FIRST degree
5 RULES that make a normal sinus rhythm ✅✅correct answ-1. HR = 60-100
2. Rhythm = regular
3. P wave = identical and before each QRS
4. PR interval = 0.12 - 0.20 seconds
5. QRS = less than 0.12 seconds
conducting rate of SA node, AV node, and purkinje fibers ✅✅correct answ-SA node= 60-100
AV node= 40-60
Purkinje fibers= 15-30
*what is a normal PR interval and QRS interval* ✅✅correct answ-PR= 0.12 - 0.20 (3 to 5 small
boxes)
QRS= < 0.12 (less than 3 small boxes)
,1 small box on an EKG = ? seconds ✅✅correct answ-0.04
where is th PR interval measured ✅✅correct answ-from the beginning of the P wave to the
beginning of the Q wave
3rd: if Ps and Qs don't agree, then you have a THIRD degree
what does 1st degree heart block look like ✅✅correct answ-
difference between depolarization and repolarization ✅✅correct answ-depolarization = systole
repolarization = diastole
what to do when there is artifact on an EKG ✅✅correct answ-correct electrodes and reassess
how to determine HR off an EKG strip (Regular and Irregular) ✅✅correct answ-Regular: 1500/ # of
tiny boxes between the R peaks
Irregular: count the number of R waves in a 6 second strip and x10
causes of sinus bradycardia (CA$$H BAK) ✅✅correct answ-Ca+ channel blockers
Athlete
Stimulation of vagus nerve
Sleep
Hypothyroidism
Beta blockers
*Amiodarone*
K+ low
initial steps in treating bradycardia/ tachycardia ✅✅correct answ--maintain patent airway/ assist
with breathing if necessary
, -oxygen (if hypoxic)
-cardiac monitor to identify rhythm/ monitor blood pressure and oxygenation
-IV access
-12 lead EKG, don't delay
-consider possible hypoxic and toxicologic causes
S/S of persistent bradycardia (AHA [i know what that] IS) ✅✅correct answ-*(HR less than 50!)*
Acute altered mental status
Hypotension
Acute heart failure
Ischemic chest discomfort
Signs of shock
treatment for symptomatic bradycardia (BEAT DOPE) ✅✅correct answ-Bradycardia...
Epinephrine
Atropine
Transcutaneous pacing
DOPamine
*what meds to give for symptomatic bradycardia (in order and how much)* ✅✅correct answ-*1.
ATROPINE*
-first dose: 1 mg bolus
-repeat every 3-5 minutes
-maximum: 3 mg
(next is whichever you have most readily available:)
2. Transcutaneous pacing
3. Dopamine (Infusion)
CORRECT ANSWERS
*what is the problem with 1st and 3rd degree heart block* ✅✅correct answ-1st degree = PR
CONSTANTLY greater than 0.20 seconds (electrical signals that pass from the atria to the ventricles
of the heart are delayed)
3rd degree = conduction disassociated from each other (electrical signals from the atria (upper
chambers of the heart) completely fail to reach the ventricles (lower chambers), causing the atria
and ventricles to beat independently, resulting in a very slow heart rate and potentially inadequate
blood flow throughout the body)
treatment for 1st and 3rd degree heart block ✅✅correct answ-1st = monitor
3rd = pacemaker
what does 3rd degree heart block look like ✅✅correct answ-
heart block poem for 1st and 3rd degree HB ✅✅correct answ-1st: if the R is far from the P, then
you have a FIRST degree
5 RULES that make a normal sinus rhythm ✅✅correct answ-1. HR = 60-100
2. Rhythm = regular
3. P wave = identical and before each QRS
4. PR interval = 0.12 - 0.20 seconds
5. QRS = less than 0.12 seconds
conducting rate of SA node, AV node, and purkinje fibers ✅✅correct answ-SA node= 60-100
AV node= 40-60
Purkinje fibers= 15-30
*what is a normal PR interval and QRS interval* ✅✅correct answ-PR= 0.12 - 0.20 (3 to 5 small
boxes)
QRS= < 0.12 (less than 3 small boxes)
,1 small box on an EKG = ? seconds ✅✅correct answ-0.04
where is th PR interval measured ✅✅correct answ-from the beginning of the P wave to the
beginning of the Q wave
3rd: if Ps and Qs don't agree, then you have a THIRD degree
what does 1st degree heart block look like ✅✅correct answ-
difference between depolarization and repolarization ✅✅correct answ-depolarization = systole
repolarization = diastole
what to do when there is artifact on an EKG ✅✅correct answ-correct electrodes and reassess
how to determine HR off an EKG strip (Regular and Irregular) ✅✅correct answ-Regular: 1500/ # of
tiny boxes between the R peaks
Irregular: count the number of R waves in a 6 second strip and x10
causes of sinus bradycardia (CA$$H BAK) ✅✅correct answ-Ca+ channel blockers
Athlete
Stimulation of vagus nerve
Sleep
Hypothyroidism
Beta blockers
*Amiodarone*
K+ low
initial steps in treating bradycardia/ tachycardia ✅✅correct answ--maintain patent airway/ assist
with breathing if necessary
, -oxygen (if hypoxic)
-cardiac monitor to identify rhythm/ monitor blood pressure and oxygenation
-IV access
-12 lead EKG, don't delay
-consider possible hypoxic and toxicologic causes
S/S of persistent bradycardia (AHA [i know what that] IS) ✅✅correct answ-*(HR less than 50!)*
Acute altered mental status
Hypotension
Acute heart failure
Ischemic chest discomfort
Signs of shock
treatment for symptomatic bradycardia (BEAT DOPE) ✅✅correct answ-Bradycardia...
Epinephrine
Atropine
Transcutaneous pacing
DOPamine
*what meds to give for symptomatic bradycardia (in order and how much)* ✅✅correct answ-*1.
ATROPINE*
-first dose: 1 mg bolus
-repeat every 3-5 minutes
-maximum: 3 mg
(next is whichever you have most readily available:)
2. Transcutaneous pacing
3. Dopamine (Infusion)
