الفهرس 
Anatomical background about heart innervationOnly 14 pages are availabe for public view
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Abstract
Many arrhythmias require admission to the ICU. The decision to manage a patient with an arrhythmia in the ICU largely depends on the underlying rhythm disturbance, and whether it is associated with signs and symptoms of hemodynamic instability .Patients with arrhythmias needing management in the ICU include patients with tachyarrhythmias and brady arrhythmias and survivors of sudden cardiac death. Length of stay in the ICU should be determined by the type of underlying rhythm, the clinical state of the patient, and whether measures have been taken to reduce the recurrence of an unstable arrhythmia.
Atrial fibrillation occurs at epidemic levels worldwide and is also associated with longer ICU stays and higher inpatient mortality when accompanied by myocardial infarction (MI) .
Narrow-complex tachycardias can lead to unstable hemodynamics .In this situation, immediate synchronized cardioversion is indicated. this is best done in the controlled setting of a ICU if possible. If a patient is out of the hospital or in a less monitored unit, admission or transfer to the ICU should for further management.
Wide-complex tachycardias may represent either supraventricular or ventricular arrhythmias. The mechanism of wide-complex tachycardias can be determined with clinical information and analysis of the 12-lead surface ECG.
Regardless of the cause, a wide-complex tachycardia that is unstable and associated with hemodynamic compromise must be treated promptly with electrical cardioversion .Pulseless ventricular tachycardia or ventricular fibrillation requires immediate defibrillation, For successfully resuscitated cardiac arrest victims, whether the event occurred in or out of the hospital, post–cardiac arrest care includes admission to an ICU and continuous monitoring for 48 to 72 hours.
Regardless of level of evidence, in practice patients who receive temporary transvenous pacemakers should be admitted to the ICU. Monitoring in the ICU should continue until the acute and reversible cause of the bradyarrhythmia is corrected, or a permanent pacemaker is placed.