“…However, reproducible coronary spasm during PFA of the cavotricuspid isthmus (CTI) or mitral isthmus has been reported. 39 , 40 , 41 The proximity of PFA to the coronary arteries increases the risk of vasospasm, and focal PFA to the CTI induces subclinical coronary spasm when applied near the right coronary artery (RCA). 42 During a study involving RCA angiography concurrent with PFA of the CTI, severe RCA spasms were universally observed.…”