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Dysrhythmias (Including EKG Strips) Questions And Answers
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Dysrhythmias (Including EKG Strips) Questions And Answers Sinus Tachycardia The conduction pathway is the same as that in sinus rhythm. The discharge rate from the sinus node increases because of vagal inhibition or sympathetic stimulation. the sinus rate is 101-200 BPM. Sinus Tachycardia S/...

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  • October 20, 2024
  • 5
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • Relias Dysrhythmia
  • Relias Dysrhythmia

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Dysrhythmias (Including EKG Strips)
Questions And Answers

Sinus Tachycardia The conduction pathway is the same as that in sinus rhythm. The

discharge rate from the sinus node increases because of vagal inhibition or sympathetic

stimulation. the sinus rate is 101-200 BPM.




Sinus Tachycardia S/S Dizziness, dyspnea, and hypotension due to decreased CO.

Increased O2 consumption due to increased HR. Angina or an increase in infarction size may

accompany this disorder in pts with CAD or AMI




Sinus Tachycardia Tx The underlying cause determines treatment, eg.) pain management

if d/t pain. In stable pts vagal manuevers can be attempted. Beta-adrenergic blockers




Atrial Flutter An atrial tachydysrhythmia identified by recurring, regular, sawtooth-shaped

flutter waves that originate from a single ectopic focus in the right atrium, less commonly, can

occur in left atrium.




Atrial Flutter S/S High venticular rate; loss of atrial 'kick'. Decreased CO, HF: esp in pts

with underlying heart disease, and increased risk of stroke.

, Dysrhythmias (Including EKG Strips)
Questions And Answers
Atrial Flutter Tx Coumadin, slow ventricular response by increasing AV block, calcium

channel blockers, beta-adrenergic blockers, electrical cardioversion, antidysrhythmia meds, and

radiofrequency catheter ablation.




Atrial Fibrillation Characterized by a total disorganization of atrial electrical activity due

to multiple ectopic foci resulting in loss of effective atrial contraction. May be paroxysmal or

persistant (+7 days). Most common dysrhythmia.




Atrial Fibrillation S/S Usually occur with underlying heart disease. Decreased CO,

thrombi form in atria due to blood stasis, causes 20% of all strokes.




Atrial Fibrillation Tx Goals include decreased ventricular repsonse (<100 BPM),

prevention of cerebral embolic events, conversion to sinus rhythm possible. Calcium channel

blockers, beta-adrenergic blockers, digoxin, dronedarone, electrical cardioversion,

antidysrhythmics, coumadin, aspirin, radiofrequency catheter ablation, maze procedure or

cryoblation.




Premature Ventricular Contractions (PVCs) A contraction originating in an ectopic focus

in the ventricles. It is the premature occurence of a QRS complex, which is wide and distorted in

shape compared with a QRS complex originated from the normal conduction pathway.

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