Is supra ventricular tachycardia (SVT), a congenital disease ?

My friend, 28, while on ski vacation was diagonsed w/ SVT and the cardiologist he/she saw recommended a cardiac ablation to cure his/her disease. His/her travel insurance does not cover pre-existing conditions. Is SVT considered a congenital disease or can he/she medically prove that this incident happened during a travel and never existed before he/she commenced his/her vacation.