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Stack #156158

QuestionAnswer
Arrythmia All rhythms other than the normal rhythm of heart. Result from disturbances in impulse discharge or impulse conduction from sinus node.
Treatment for Sinus Brady 40-60 bpm. No treatment unless pt. is symptomatic. Atropine 0.5 mg IV; transcutaneous/ transvenous pacing; Oxygen.
Sinus Arrythmia 60-100; irregular rhythm. Pwave nL. Tx no necessary unless associated w/brady or tachy.
Sinus Block Basic rhythm resumes on time after pause. T-wave remains unchanged.
Sinus Arrest Basic rhythm doesn't resume on time after pause. T-wave remains unchanged.
Treatment for Sinus arrest or block Long pauses tx same as brady. Pt to cough; atropine; pacing; stop all medicine that depresses sinus node.
Ride Side heart chamber Pumps venous (deoxygenated) blood into lungs.
Left side of heart chamber Pumps arterial (oxygenated) blood inot systemic circulation.
Right coronary artery Supplies R atrium/ventricle;inferior wall of L ventricle; Posterior wall of L ventricle. Conducted by SA,AV, & Bundle of His, posterior fascicle of LBB
Left coronary artery Anterior descending, Circumlex. Supplies L atrium/anterolateral L ventricle, posterolateral wall of L ventricle; Conducted by SA/AV nodes & Bundle of His.
SA Node Wall of R atrium. Pacemaker cell 60-100 bpm.
AV Node Backup pacemaker 40-60 bpm. Slows conduction from SA to allow for atria to contrct & empty to ventricle.
Normal Q-T interval QT interval should be less than half of the R-R interval. Short QT Interval is insignificant; Long QT Interval means delay in ventricular repolarization.
Wandering Atrial Pacemaker Slows sinus rate. Not significant. Rhythm regular or irregular; rate nL 60-100 bpm; one P waver per QRS; PRI nL; QRS nL
Premature Atrial Contraction (PAC) Underlying rhythm regular or irregular; Rate same as underlying rhythm; P waves premature & abnormal in size/hidden in T wave/distorting T-wave; PRI usu. nL; QRS premature.
Treatment for PAC May indicate impending onset of atrial flutter/fibrillation or PSVT. Treat cause w/Beta blockers, Ca+ Channel blockers, or anti-anxiety drugs.
Nonconducted Premature Atrial Contraction (NPAC) AV node is refractory and impulse isn't conducted to ventricles. Results in abnormal P wave not accompanied by QRS comples. Underlying rhythm regular or irregular; Rate of underlying rhythm; P waves abnormal in size or hidden/distorting T Wave; PRI absent
Paroxysmal Atrial Tachycardia (PAT) May be initiated by PAC. Rhythm regular; rate 140-250 bpm; P waves abnormal, usu hidden in preceeding T-wave; one P-wave to each QRS; PRI not present; QRS nL.
Supraventricular Tachycardia (SVT) Originate above Bundle of His; Rhythm regular; Rate 150-250 bpm; P waves different from atrial P waves; PRI absent; QRS nL/Narrow <.10
Treatment for Atrial Tachycardia & SVT Ask pt to bear down & cough; Cardioversion, Adenosine rapid IVP.
Atrial flutter Atria depolarize at 250-400 bpm, blocked by AV node. Rhythm regular or irregular; Rate 250-400 bpm; P waves saw tooth shape; PRI not measurable; QRS normal.
Treatment or Atrial flutter Clots forming; If present for < 48hrs, cardioversion & amiodarone; if > 48hrs-no cardioversion unless adequately anticoagulated. Ca+ channel blockers (Cardizem).
Atrial fibrillation Pacemaker sites depolarize at rate >400 bpm. Atria quivers instead of contracts. Rhythm irregular; Rate 400+ bpm; P waves irregular deflections (fibrillatory waves that affect baseline); PRI not measurable; QRS nL.
Treatment for A-Fib Control heart rate; anticoagulation as prophylaxis to thromboembolism; return atria to NSR.
 

 



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