Dysrhythmia Treatment Exam Questions With Accurate
Solutions.
3 internal pacemakers - accurate answers-SA node
AV node
Purkinje fibers and ventricular cardiomyocytes
SA node pacemaker - accurate answers-Right atrium at junction w/ SVC
60-100 bpm
AV node pacemaker - accurate answers-right atrium at posteroinferior area of
intertribal septum
40-60 bpm
Purkinje fibers and ventricular cardiomyocytes - accurate answers-
throughout ventricles
20-40 bpm
Normal sinus rhythm - accurate answers-consistent dystanse (duration) b/w
similar waves during a normal, regular cardiac rhythm
P before every QRS
Rate 60-100 bpm
Bradyarrhythmias - accurate answers-Hypoglycemia, hypothermia,
hypothyroidism, infections, hypo/hyperkalemia, OSA, inferior wall MI, meds
(beta-blockers, CCIs, antiarrhythmics), increased vagal tone
Bradyarrhythmias can lead to - accurate answers-sick sinus syndrome due to
fibrosis around SA node leading to slowed conduction
Symptomatic bradyarrhythmias - accurate answers-Weakness, dizziness,
syncope/near syncope, chest pain, SOB
, Initial bradyarrhythmia assessment - accurate answers-checking pulse while
evaluating patient, then confirming EKG
Bradyarrhythmia treatment - accurate answers-monitoring without specific
intervention to starting ACLS regimen
Sinus bradycardia - accurate answers-Regular, slow heart beat
<60 bpm
Hypoglycemia, hypothermia, hypothyroidism, OSA, inferior wall MI, meds
Many not symptomatic UNTIL <50 bpm
1st degree AV block - accurate answers-Prolonged AV node conduction
PR interval >0.20
Consistent in every cycle
2nd degree AV block, type 1 - accurate answers-"Wenckebach"
Allows some atrial depolarization to conduct ventricles (P waves), while some
are blocked leaving a long P wave w/o an associated QRS complex
Progressive blocking of AV node until final P wave is totally blocked and QRS
response is eliminated
2nd degree AV block, type 2 - accurate answers-"Mobitz II"
Allows some atrial depolarization to conduct ventricles (P waves), while some
are blocked leaving a long P wave w/o an associated QRS complex
One normal cycle, preceded by a series of paced P waves that fail to conduct
through AV node (no QRS)
2:1 or 3:1. p-wave:QRS
Solutions.
3 internal pacemakers - accurate answers-SA node
AV node
Purkinje fibers and ventricular cardiomyocytes
SA node pacemaker - accurate answers-Right atrium at junction w/ SVC
60-100 bpm
AV node pacemaker - accurate answers-right atrium at posteroinferior area of
intertribal septum
40-60 bpm
Purkinje fibers and ventricular cardiomyocytes - accurate answers-
throughout ventricles
20-40 bpm
Normal sinus rhythm - accurate answers-consistent dystanse (duration) b/w
similar waves during a normal, regular cardiac rhythm
P before every QRS
Rate 60-100 bpm
Bradyarrhythmias - accurate answers-Hypoglycemia, hypothermia,
hypothyroidism, infections, hypo/hyperkalemia, OSA, inferior wall MI, meds
(beta-blockers, CCIs, antiarrhythmics), increased vagal tone
Bradyarrhythmias can lead to - accurate answers-sick sinus syndrome due to
fibrosis around SA node leading to slowed conduction
Symptomatic bradyarrhythmias - accurate answers-Weakness, dizziness,
syncope/near syncope, chest pain, SOB
, Initial bradyarrhythmia assessment - accurate answers-checking pulse while
evaluating patient, then confirming EKG
Bradyarrhythmia treatment - accurate answers-monitoring without specific
intervention to starting ACLS regimen
Sinus bradycardia - accurate answers-Regular, slow heart beat
<60 bpm
Hypoglycemia, hypothermia, hypothyroidism, OSA, inferior wall MI, meds
Many not symptomatic UNTIL <50 bpm
1st degree AV block - accurate answers-Prolonged AV node conduction
PR interval >0.20
Consistent in every cycle
2nd degree AV block, type 1 - accurate answers-"Wenckebach"
Allows some atrial depolarization to conduct ventricles (P waves), while some
are blocked leaving a long P wave w/o an associated QRS complex
Progressive blocking of AV node until final P wave is totally blocked and QRS
response is eliminated
2nd degree AV block, type 2 - accurate answers-"Mobitz II"
Allows some atrial depolarization to conduct ventricles (P waves), while some
are blocked leaving a long P wave w/o an associated QRS complex
One normal cycle, preceded by a series of paced P waves that fail to conduct
through AV node (no QRS)
2:1 or 3:1. p-wave:QRS
