Non-invasive characterisation of macroreentrant atrial tachycardia types from a vectorcardiographic approach with the slow conduction region as a cornerstone

•A non-invasive methodology is proposed to characterise different AFL circuits.•The VCG trajectory is evaluated to characterise AFL.•Consistency in the slow regions is determined for cases from the same AFL type.•The proposed method helps to identify AFL types in a non-invasive way.•The provided information prior to ablation may improve medical interventions.