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Bradyarrhythmias are due to a variety of disorders leading to a reduction of heart rate below that which is required to meet physiologic demand. The limitation of heart rate can be related to impaired impulse formation, blocked impulses, or a combination of these. Bradycardia related to sinus node dysfunction most frequently results from a reduction in the number of pacemaker impulses, while bradycardia...
Radiofrequency ablation of the atrioventricular (AV) node has become an established method of treating drug-resistant supraventricular arrhythmias, especially atrial fibrillation. Although it is routine to implant a permanent pacemaker following ablation, one of the potential adverse effects of the procedure is that many patients become pacemaker-dependent and are at risk of an adverse outcome in...
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