RT-121
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Atrial and ventricular mapping using basket electrode catheter
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Peter Rakovec, Matjaž Šinkovec, Silvia Samarin.
Department of Cardiology, University Medical Centre, Ljubljana, Slovenia
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Introduction
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For successful radiofrequency ablation or
surgical treatment of supraventricular or ventricular tachycardias some kind of cardiac
mapping is needed. Most often single-electrode sequential mapping technique gives
satisfactory results. This is true for the tachycarcias with well-defined re-entry circuits
as e.g. common atrial flutter or orthodromic tachycardia in a patient with
Wolff-Parkinson-White syndrome. On the other hand, tachycardias with a great
variety of possible locations of arrhythmogenic foci or micro-re-entry circuits more
extensive mapping is needed. To determine detailed spatio-temporal patterns of
endocardial activation an isochronous map has to be constructed using activation
times, measured from many simultaneously or sequentially recorded electrograms.
Sequential mapping is time consuming and the patient has to endure the tachycardia
for a prolonged period of time. Therefore, simultaneous multisite high-density
mapping is a better alternative for patients with very fast tachycardias as well as for
patients with short attacks of non-sustained tachycardias. We report our experience
with basket-shaped 32-bipolar electrode catheters in patients with supraventricular
and ventricular tachycardias.
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