Table 1. Dose constraints for close organs at risk for atrial fibrillation radiosurgery.

Grading based on CTCAE (version 4.03) and single fraction dose limits based on [41, 42] DMax = Maximum Dose, VxGy = Volume receiving X Gy or more

Organ at risk	Side Effect Risk	Dmax	Volume
Esophgaus	<= Grade 1	< 14 Gy	V9.0Gy < 1 cc
	>=  Grade 3	> 19 Gy	V14.5Gy > 5 cc
Brochial Tree	<= Grade 1	< 14 Gy	V10.0Gy < 1 cc
	>=  Grade 3	> 22 Gy	V10.5Gy > 4 cc
Coronary Artery	<= Grade 1	< 16 Gy	No data
	>=  Grade 3	20Gy Circumferential
Major Vessels	<= Grade 1	No data
	>=  Grade 3	> 37 Gy	V31Gy > 10 cc