Virtual Conference

Nándor Szegedi

Hungary, Semmelweis University, Hungary
Title : New technical aspects of point-by-point atrial fibrillation ablation: High power – short duration ablation


Catheter ablation is the cornerstone of the rhythm control treatment of atrial fibrillation (AF). During this procedure, creating a contiguous and durable lesion set is essential to achieve good long-term results. Radiofrequency lesions are created in two phases: resistive and conductive heating. The ablation catheters and the generators have undergone impressive technical developments to enable homogenous and good-quality lesion creation. Despite recent years’ achievements, the durable isolation of the pulmonary veins remains a challenge. These days, intensive research aims to evaluate the role of high-power radiofrequency applications in the treatment of patients with cardiac arrhythmias. The use of high-power short-duration applications might result in a uniform, transmural lesion set. It is associated with shorter procedure time, shorter left atrial and fluoroscopy time than low-power ablation. This technique was also associated with a better clinical outcome, possibly due to the better durability of lesions. Multiple clinical studies have proven the safety and efficacy of high-power, short-duration PVI. In this talk I would like to give an overview about high power short duration AF ablation, from the lesion formation to the clinical outcomes.


Nándor Szegedi, MD was born in Debrecen, in 1988. He graduated at Semmelweis University (summa cum laude). He completed his internal medicine clinical rotation in the United States. Topic of his thesis was catheter ablation treatment of focal atrial tachycardias. He works in the Heart and Vascular Center of the Semmelweis University as a cardiologist since 2012 and takes also part in the gradual education and research. He performs catheter ablation procedures since 2013 regularly in the Electrophysiology Laboratory of the Hospital. He is the president of Hungarian Youth Cardiology Commitee and member of the Board of Hungarian Arrhythmia and Pacemaker Working Group since 2017. He is an EHRA (European Heart Rhythm Association) certified electrophysiology specialist since 2017. He successfully passed the cardiology qualification exam in 2018. He is co-author of several Hungarian cardiology textbooks and the editor of a new cardiology handbook (2019: Kardiológia – zsebkönyv (szak)vizsgára készül?knek). He is author of many papers published in Hungarian and international journals. He obtained a PhD degree in 2020, title of his PhD thesis is: Evaluation of Factors Correlating with the Outcome of Atrial Tachycardia and Atrial Fibrillation Ablation.