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(BQ) Part 2 book "ECG interpretation made incredibly easy" presents the following contents: Treating arrhythmias (nonpharmacologic treatments, pharmacologic treatments), the 12-lead ECG (obtaining a 12-lead ECG, interpreting a 12-lead ECG). | Part III Treating arrhythmias 9 Nonpharmacologic treatments 175 10 Pharmacologic treatments 205 9 Nonpharmacologic treatments Just the facts In this chapter you ll learn nonpharmacologic treatments of arrhythmias and how they work ways to identify and treat complications of nonpharma-cologic treatments nursing care for patients receiving nonpharmacologic treatments patient teaching points for nonpharmacologic treatments. A look at pacemakers A pacemaker is an artificial device that electrically stimulates the myocardium to depolarize which begins a contraction. Pacemakers may be used when a patient has an arrhythmia such as certain bradyarrhythmias and tachyarrhythmias sick sinus syndrome or atrioventricular AV blocks. The device may be temporary or permanent depending on the patient s condition. Pacemakers are commonly necessary following myocardial infarction or cardiac surgery. And the beat goes on. Pacemakers work by generating an impulse from a power source and transmitting that impulse to the heart muscle. The impulse flows throughout the heart and causes the heart muscle to depolarize. Pacemakers consist of three components the pulse generator the pacing leads and the electrode .