¹Cardiovascular Center, International University of Health and Welfare Mita Hospital, Tokyo, Japan;²Helmsley Electrophysiology Center, Department of Cardiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA

Word count: 1095

Keywords: Mini electrodes, catheter ablation, cardiac mapping, atrioventricular node, tachyarrhythmia, Wolff-Parkinson-White syndrome

Funding: . None

Disclosures: Dr Koruth owns stock in Affera; and has served as a consultant for Abbott, Farapulse and CardioFocus

Address for correspondence :

Jin Iwasawa, MD

Cardiovascular Center, International University of Health and Welfare Mita Hospital, 1-4-3, Mita, Minato, Tokyo, Japan 108-8329.

Fax: +81-3-3454-0067

E-mail: jin_iwasawa@nifty.com