Fundamentals of Intracardiac Mapping

This chapter discusses the fundamentals of intracardiac mapping as it relates to the mapping and ablation of cardiac arrhythmias. The initial sections are dedicated to the basis and methodology of intracardiac, extracellular recording techniques; this is followed by a description of intracardiac electrograms as recorded in the normal myocardium, and subsequently by a description of intracardiac signals in the abnormal heart. The remainder of the chapter is dedicated to the application of various endocardial mapping techniques, including activation, pace, and entrainment mapping, in the diagnosis and ablation of atrial and ventricular arrhythmias in both normal and diseased hearts.