Table. Clinical Characteristics and Procedural Data.

Characteristic	Patient No.
	1	2	3	4
Clinical characteristics
Sex	Male	Male	Male	Male
Diabetes	No	No	No	No
Hypertension	Yes	No	Yes	No
Type of cardiomyopathy	Ischemic	Nonischemic	Ischemic	Ischemic
Left ventricular ejection fraction, %	40	35	15	35
Chronic kidney disease	No	No	Yes	No
New York Heart Association class	II	II	III	I
Clinical presentation	VT storm	Nonsustained VT	VT storm	VT storm
Amiodarone	Yes	Yes	Yes	Yes
≥2 Antiarrhythmic drugs	Yes	Yes	Yes	Yes
Baseline
Rhythm	AF	Sinus	AF	Sinus
Conduction	Complete heart block	First atrioventricular delay, intraventricular conduction delay	Intraventricular conduction delay	Normal
Procedural data
International normalized ratio (day of the procedure)	3	2.1	2.3	3.2
Time to obtain left ventricular access, min	60	35	28	22
Balloon size for ISP-LV dilatation, mm	8	8	10	8
Size of residual Gerbode defect on intracardiac echocardiography, mm	4	3	5	4
No. of VTs induced	3	2	6	3
TCL, ms
Fastest	350	340	380	270
Slowest	460	390	570	350
Noninducibility of any VT at programmed electrical stimulation	Yes	Yes	Noa	Yes

Abbreviations: ISP-LV, inferior-septal process of the left ventricle; VT, ventricular tachycardia.

^aTwo nonclinical hemodynamically unstable VTs remained inducible and were not targeted.