Ablation should be considered in symptomatic patients with recurrent or persistent SVT, despite treatment, prior to high-risk, non-urgent NCS.(Evidence: Level B，Recommendation: Class IIa)

In AF patients with acute or worsening haemodynamic instability undergoing NCS, emergency electrical cardioversion is recommended.(Evidence: Level B，Recommendation: Class I)

In AF patients with haemodynamic instability,amiodarone may be considered for acute control of heart rate.(Evidence: Level B，Recommendation: Class IIb )

In patients with symptomatic, monomorphic,sustained VT associated with myocardial scar,recurring despite optimal medical therapy, ablation of arrhythmia is recommended before elective NCS.(Evidence: Level B，Recommendation: Class I)

It is not recommended to initiate treatment of asymptomatic PVC during NCS.(Evidence: Level C，Recommendation: Class III)

If indications for pacing exist according to the 2021 ESC Guidelines on cardiac pacing and cardiac resynchronization therapy,481 NCS surgery should be deferred and implantation of a permanent pacemaker should be considered.(Evidence: Level C，Recommendation: Class IIa)

It is recommended that patients with temporarily deactivated ICDs have continuous ECG monitoring, and during the peri-operative periodare accompanied by personnel skilled in early detection and treatment of arrhythmias. In high-risk patients (e.g. pacemaker-dependant or ICD patients), or if access to the torso will be difficult during the procedure, it is recommended to place transcutaneous pacing/defibrillation pads prior to NCS.(Evidence: Level C，Recommendation: Class Ⅰ)

It is recommended that all patients with CIEDs that are reprogrammed before surgery have a re-check and necessary reprogramming as soon as possible after the procedure.(Evidence: Level C，Recommendation: Class Ⅰ)

In high-risk CIED patients (e.g. with ICD or being pacing-dependant) undergoing NCS carrying a high probability of electromagnetic interference (e.g. involving unipolar electrosurgery above the umbilical area), CIED check-up and necessary reprogramming immediately before the procedure should be considered.(Evidence: Level C，Recommendation: Class IIa)

In patients with ACHD, a consultation with an ACHD specialist is recommended before intermediate- or high-risk surgery.(Evidence: Level C，Recommendation: Class Ⅰ)