Pace maker is a small electronic device to replicate/stimulating the heart muscle and regulating heart beat contractions.Pacemakers use low-energy electrical pulses to overcome this faulty electrical signaling from SA node. The person who has Arrhythmia problems which means the rate or rhythm of the heartbeat is not in normal sequence/irregular sequence. During an arrhythmia, the heart can beat too fast(tachycardia)/ too slow(bradycardia) ,for this arrhythmia patient pace maker will be place permanently or temporary according to their conditions. the sinus node or sinoatrial or SA node which normally regulates heart electric pulse .
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thanx for ur answer . its really help me.
pacemaker is a device that's placed in the chest or abdomen to help control abnormal heart rhythms and  this device is also uses electrical pulses to prompt the heart to beat at a normal rate and pacemakers are used to treat arrhythmias .
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