Radiofrequency catheter ablation

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Radiofrequency catheter ablation (RFA) is the definitive non-pharmacological treatment for arrhythmias; follows the electrophysiological examination. This is a procedure with which we can specifically influence the pathological electrical activity of a certain area of ​​the cardiac myocardium. Selective radiofrequency ablation aims to destroy the arrhythmogenic focal deposit in the myocardium or break the reentry circuit.

Mechanism of radiofrequency ablation

Radiofrequency energy represents high-frequency alternating electric current, for the purposes of catheter ablation, we use a current with frequencies of 500–1000 kHz.

  • We introduce the ablation catheter via the vein or femoral artery under X-ray control into the heart cavities (the ablation catheter is connected to a radiofrequency ablator and a multi-channel ECG recorder).
  • The passage of electric current through the myocardium accelerates the movement of ions, which generates heat. Temperatures above 46 ° C result in denaturation of proteins, coagulation necrosis develops, which then heals with a non-cytogenic scar. Commonly used temperatures are 60-70 ° C for 40-50 seconds.
  • We verify the effectiveness of RFA by electrophysiological examination.

Indication reentry.png.png

Principle of orthodromic AV reentry tachycardia: the excitement reaches the chambers in a physiological way (via the AV node), from which, however, the accessory pathway in the septum between the left atrium and left ventricle (James's bundle) returns to the atrium, creating a reentry circuit leading to tachycardia. Interruption of this circuit would be the essence of RFA,

  • Supraventricular tachyarrhythmias (SVT),

  • Ventricular tachycardia (ventricular tachycardia, VT),
  • Monomorfní komorová tachykardie,
  • Bundle-branch reentry komorová tachykardie.

Complications[edit | edit source]

.The complications of radiofrequency ablation are generally low. These can be:

Links[edit | edit source]

Související články[edit | edit source]


  1. KAUTZNER, Josef. Katetrizační ablace srdečních arytmií. Kardiologická revue. 2006, roč. 0, vol. Suplementum, s. 4, ISSN 1801-8653. 
  • DÍTĚ, P., et al. Vnitřní lékařství. 2. vydání. Praha : Galén, 2007. ISBN 978-80-7262-496-6.

Kategorie:Vnitřní lékařství Kategorie:Kardiologie Kategorie:Interní propedeutika