Table 8.

Advice table for the use of CCT and CMR in non-ischaemic VT ablation procedures

Advice for the use of CCT and CMR in non-ischaemic VT ablation procedures	Strength of advice	Imaging modality	CT specifications	MR specifications
(1) Pre-procedural imaging is advised to rule out intracavitary ventricular thrombus		CMR or CCT	i.v. contrast injection and imaging in arterial and delayed phase	Early and late gadolinium enhancement sequences/LGE, steady-state free precession sequence (cine)
(2) Pre-procedural imaging is advised to determine scar location		CMR or CCT	i.v. contrast injection and late iodine enhancement	LGE
(3) Pre-procedural imaging may be appropriate to determine scar transmurality		CMR or CCT	i.v. contrast injection and late iodine enhancement	LGE
(4) Pre-procedural imaging may be appropriate to determine intramural scar location		CMR	i.v. contrast injection and late iodine enhancement	LGE
(5) Pre-procedural imaging may be appropriate to identify areas of fibrofatty replacement in ARVC		CCT	i.v. contrast injection and imaging in arterial phase	Cine, black-blood sequences, LGE
(6) Whether post-processing imaging-derived scar (VT substrate) and integration into 3D mapping system is useful to aid or guide VT ablation is uncertain		CMR	i.v. contrast injection arterial phase and late iodine enhancement	LGE

ACM, arrhythmogenic cardiomyopathy; CCT, cardiac computed tomography; CMR, cardiac magnetic resonance imaging; CT, computed tomography; LGE, late gadolinium enhancement; MR, magnetic resonance; VT, ventricular tachycardia.