Prof. Széplaki graduated as an MD at the Semmelweis University, Budapest and later completed his PhD thesis in the field of atherosclerosis. He completed his cardiology training and later worked as a senior lecturer at the Heart and Vascular Centre, Semmelweis University before joining the Mater Private Hospital, Dublin.  He also obtained a Diploma of Advanced Studies in Cardiac Arrhythmia Management at the Maastricht University Medical Centre.

His special interest focuses on the invasive treatment of cardiac arrhythmias, including complex ablations for atrial fibrillation or other supraventricular and ventricular arrhythmias. He introduced the approach and is the only Electrophysiologist in Ireland who regularly performs zero fluoroscopy ablations for selected cases; this completely avoids the use of radiation during the treatment.