4.

Table Medicare expenditures by peri-procedural imaging groups

Time Period	EAM Only (n = 3,238)	EAM + TEE (n = 2,563)	EAM + CT/MRI (n = 2,227)	EAM + CT/MRI + TEE (n = 3,497)	p
Overall expenditures
Pre-procedure, 6m prior
Mean (SD)	8,996 (11,952)	9,566 (11,490)	9,200 (10,582)	9,125 (10,005)	<.001
Median (Q1; Q3)	4,892 (2,305; 11,321)	5,313 (2,529; 12,001)	5,626 (2,732; 12,021)	5,742 (3,007; 11,860)
Day-of-procedure
Mean (SD)	13,805 (7,310)	15,019 (7,733)	13,928 (6,150)	14,980 (8,002)	<.001
Median (Q1; Q3)	12,647 (11,179; 16,206)	13,574 (11,854; 16,912)	13,178 (11,590; 16,555)	13,806 (12,151; 16,593)
Post-procedure, 6m following*
Mean (SD)	10,244 (17,283)	9,875 (15,028)	8,894 (13,708)	9,614 (15,430)	.07
Median (Q1; Q3)	4,027 (1,862; 13,215)	4,658 (1,994; 12,690)	3,861 (1,907; 11,754)	4,225 (2,028; 12,052)
Imaging expenditures
Peri-procedure, 30d prior + day-of
Mean (SD)	557 (269)	725 (281)	994 (392)	1,234 (461)	<.001
Median (Q1; Q3)	531 (414; 596)	657 (548; 765)	963 (752; 1,150)	1,155 (874; 1,521)
Pre-procedure, 30d prior†
Mean (SD)	61 (145)	233 (241)	468 (289)	712 (442)	<.001
Median (Q1; Q3)	0 (0; 47)	123 (114; 229)	446 (280; 618)	611 (331; 1,022)
Intra-procedure‡
Mean (SD)	496 (222)	492 (130)	526 (258)	522 (138)	<.001
Median (Q1; Q3)	514 (391; 545)	521 (400; 546)	533 (438; 555)	532 (509; 554)
Post-procedure, 6m following*
Mean (SD)	205 (328)	192 (317)	198 (318)	223 (360)	.22
Median (Q1; Q3)	0 (0; 288)	0 (0; 278)	0 (0; 314)	26 (0; 353)

d = day; EAM = electroanatomical mapping; ICE = intracardiac echocardiography; m = month; Q = quartile; SD = standard deviation; TEE = transesophageal echocardiogram; TTE = transthoracic echocardiogram.

^*Only reported for patients with complete 6m follow-up.

^†Includes day-of-ablation TEE/TTE procedures.

^‡Includes ICE (when used) and EAM.