Synchronized electrical cardioversion

Synchronized Electrical Cardioversion (Tachycardia w/ Pulses in Hemodynamic Instability) Adult... 

If patient unstable, possible synchronized electrical cardioversion... 

If patient hemodynamically unstable and with atrial flutter of 48 hours or less, immediate synchronized electrical cardioversion... 

If other treatments fail or the patient is unstable, synchronized electrical cardioversion may be used. 

If the patient is hemodynamically unstable and atrial flutter has lasted 48 hours or less, synchronized electrical cardioversion or coimtershock should be performed right away. 

Direct current cardioversion is the process of administering a synchronized electrical shock to the chest. The purpose of DCC is to simultaneously depolarize all of the myocardial cells, resulting in interruption and termination of the multiple reentrant circuits and restoration of normal sinus rhythm. The initial energy level of the shock is 100 joules (J) if the DCC attempt is unsuccessful, successive cardioversion attempts maybe made at 200,300, and 360 J.14 Delivery of the shock is synchronized to the ECG by the cardioverter machine, such that the electrical charge is not delivered during... 

Direct current cardioversion The process of administering a synchronized electrical shock to the chest to simultaneously depolarize all of the myocardial cells, resulting in restoration of normal sinus rhythm. 

Ventricular tachycardia (VT) is the result of uncontrolled electrical activity in the ventricle. This activity may be coordinated or uncoordinated. The definitive therapy for Ventricular is external stimulation by an electric field sufficiently large to reset the electrical activity of most ventricular cells. This ends the previous (uncontrolled) electrical activity and allows the reestablishment of normal cardiac activity. As explained earlier, this requires depolarization of a critical mass of tissue by a high-voltage discharge. When high-voltage therapy is delivered, an attempt is made to synchronize the delivery with a detected R-wave. A synchronized shock is termed cardioversion, whereas an unsynchronized shock is termed defibrillation because VF has no coherent electrical activity, and therefore no basis for synchronization (Figure 15.6). 

In synchronized cardioversion, an electric current is delivered to the heart to correct an arrhythmia. This procedure may be done electively in a stable patient with recurrent atrial fibrillation or urgently in an unstable patient with such arrhythmias as PSVT, atrial flutter, atrial fibrillation, and VT with a pulse. 

Compared with defibrillation, synchronized cardioversion uses much lower energy levels and Is synchronized to deliver an electric charge to the myocardium on the peak R wave. 

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See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

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