Table 1.

Information provided by CT prior to various types of cardiothoracic surgery and percutaneous intervention

Procedure	CT information
Re-operative cardiothoracic surgery	Relationship of cardiovascular structures to sternum.
	Relationship of coronary bypass grafts to sternum
	Atherosclerotic calcification of ascending aorta
	Anatomy of subclavian & axillary arteries and aortic arch
Percutaneous aortic valve	Aortic root dimensions
	LV outflow tract: size; septal thickness
	Leaflet morphology/calcification
	Valve area
	Leaflet opening
	Distance between annulus and coronary ostia
	Leaflet length
	Relationship of aortic root to body axis
	Caliber and contour of access vessels
Pulmonary venous ablation	Pulmonary venous anatomy
	Branching pattern
	Orientation
	Ostial size and pulmonary venous stenosis
	Left atrial dimensions
	Thrombus
	Relationship to oesophagus
Robotic mitral valve repair	Annulus and leaflet morphology
	Mitral annular calcification
	Annulus dimensions
	Calibre of femoral vessels
	Atherosclerosis of access vessels
	Distance from sinotubular junction to arch
Cardiac resynchronisation therapy	Coronary venous anatomy
	Scar in lateral wall
Percutaneous mitral annuloplasty	Distance between coronary sinus/GCV and annulus
	LCX between CS-GCV and annulus
	Calcification of mitral annulus
Atrial septal defect closure	Type of defect
	Size of defect
	Rim of defect
	Associated cardiovascular anomalies
	Thrombus
Ventricular septal defect closure	Type of defect
	Size of defect
	Shape of defect
	Proximity to valves and AV conduction bundle
Endovascular stent grafts	Measurement of the primary pathology
	Maximal aortic diameter at the landing zone/neck
	Thrombus/atheroma in the landing zone
	Distance from major branch vessel
	Angulation at diaphragm
	Calibre of femoral/iliac arteries
Percutaneous pulmonary valve implantation	Calibre of RV-PA conduit
	Length of the conduit available from pulmonary artery bifurcation
	RVOT/pulmonary trunk morphology
	Position of proximal coronary arteries