The, NormalCardiac. Conducting. System The Normal Electrocardio.q.ra.miECG) Cardiac.. Dysrhythmias
,Me.c.h,a.n.i,sm,s...o,f., Bra,dydysrh,yt,hm,i,a,s Supraventricular.Dysrh.yt.h.mias
At,rioye,ntricula,r.(AV) ..Dissociation At.rioye.n,tris.u.la.r..(AVl ..Block Second-Degree, ..M,obitz..I..(W,e,n,ck,e,ba,cM ..AV..Bloc,k Second-Degree, ..Mobitz..II .AV,..Blo,ck Third-Degree. (Complete) ..av. Block Fascicular Blocks
PreterminalRhythms Pulseless. . .Electrical. . Actiyity. . (PEA)
Tachycardia:BradYcardia„ .Syndrom.e..,(.Sick ..Si„n„us...S.yndrome) Clin.ic.al ..Significance
Preexcitation, .Syndromes Clinical ..Significance Treatment
Defibrillation and Synchronized ..Cardioyersion Cardiac.. Pacemakers Indications. for ..Emergency. .Pacing
The interpretation and treatment of cardiac dysrhythmias is basic to the practice of emergency medicine. This chapter reviews the important cardiac rhythm and conduction disturbances, their clinical significance, and their emergency treatment. Discussions of defibrillation, cardioversion, and artificial cardiac pacemakers are also included.
Although emphasis is appropriately placed on drug treatment of these dysrhythmias, it is also important that underlying and reversible causes of rhythm and conduction disturbance—such as hypoxia, alkalosis, electrolyte abnormalities, and drug toxicity—be recognized and treated.
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