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Exam (elaborations)

Heart Dysrhythmias Cheat Sheet

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Heart Dysrhythmias Cheat Sheet

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  • December 8, 2023
  • 10
  • 2023/2024
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Heart Dysrhythmias Cheat Sheet

, Heart Dysrhythmias Cheat Sheet

Arrhythmias Description Causes Treatment

 Irregular atrial and  Normal variation of  Atropine if rate
ventricular normal sinus rhythm in decreases below 40bpm.
rhythms. athletes, children, and
 Normal P wave the elderly.
Sinus Arrhythmia
preceding each QRS  Can be seen in digoxin
complex. toxicity and inferior
wall MI.

 Atrial and  Normal physiologic  Correction of
ventricular rhythms response to fever, underlying cause.
are regular. exercise, anxiety,  Beta-adrenergic blockers
 Rate > 100 bpm. dehydration, or or calcium channel
 Normal P wave pain. blockers for
preceding each QRS  May accompany symptomatic patients.
Sinus Tachycardia complex. shock, left-sided heart
failure, cardiac
tamponade,
hyperthyroidism, and
anemia.
 Atropine, epinephrine,
quinidine, caffeine,
nicotine, and alcohol
use.
 Regular atrial and  Normal in a well-  Follow ACLS protocol for
ventricular conditioned heart administration of
rhythms. (e.g., athletes). atropine for symptoms of
 Rate < 60 bpm.  Increased intracranial low cardiac output,
Sinus Bradycardia  Normal P wave pressure; increased dizziness, weakness,
preceding each QRS vagal tone due to altered LOC, or low blood
complex. straining during pressure.
defecation, vomiting,  Pacemaker
intubation, mechanical
ventilation.
 Atrial and ventricular  Infection  Treat symptoms
rhythms normal except  Coronary artery disease, with atropine I.V.
for missing complex. degenerative heart  Temporary pacemaker
Sinoatrial (SA)  Normal P wave disease, acute inferior or permanent
arrest or block preceding each QRS wall MI. pacemaker if considered
complex.  Vagal stimulation, for repeated episodes.
 Pause not equal to Valsalva’s maneuver,
multiple of the carotid sinus
previous rhythm. massage.
 Atrial and ventricular  Rheumatic carditis due  No treatment if patient
Wandering atrial rhythms vary to inflammation is asymptomatic
pacemaker slightly. involving the SA node.
 Irregular PR interval.  Digoxin toxicity

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