Table 1.

Timelines.

Case 1
Index date	A 66-year-old male with ischemic cardiomyopathy and recurrent VTs requiring therapy from ICD
1,5,11 months	Repeated ineffective catheter ablations due to intramural location of the substrate
18 months	First SBRT with continuing recurrences of VT
34 months	Remapping after the first SBRT
38 months	Second SBRT, after 3 months VT disappeared
69 months	Last follow-up visit, no arrhythmias
Case 2
Index date	A 34-year-old patient with an intramyocardial fibroma (60 × 40 × 25 mm) in the inferolateral wall of the left ventricle and recurrent VTs of different morphologies
6 months	Empirical circumferential epicardial cryoablation around the tumor, 6 months without recurrences of VT
13 months	Catheter ablation for recurrences of 2 morphologies of VT, one non-inducible, other almost incessant
14 months	First SBRT, within 6 months all arrhythmias gradually disappeared
38 months	v Re-do catheter ablation, without elimination of VT due to intramural substrate located in the opposite side of the tumor
38 months	Second SBRT, within 3 months VT disappeared
60 months	Last follow-up visit, no arrhythmias
Case 3
Index date	A77-year-old male with non-ischemic cardiomyopathy, aortic valve replacement and fibrosis in basal region of left ventricle and sporadic interventions of ICD
70 months	Repeated catheter ablation for electrical storm
71 months	First SBRT, arrhythmias less frequent
73 months	Re-do catheter ablation for VT recurrences in basal septal region above the previous SBRT, non-inducibility
75 months	Second SBRT for incessant VT, leading to slowing VT to 100 bpm
76 months	Re-do catheter ablation in the basal septum, non-inducibility
77 months	Progression of heart failure and cachexia, death