COMBINATION OF LEFT ATRIAL APPENDAGE ISOLATION AND LIGATION TO TREAT NONRESPONDERS OF PULMONARY VEIN ISOLATION ArticleFink T., Heeger C.H., Lemeš C., Maurer T., Reissmann B., Rottner L., Santoro F., Tilz R.R., Alessandrini H., Rillig A., Mathew S., Ouyang F., Kuck K.H., Metzner A., Schlüter M., Wohlmuth P., Fang Q., Lee R.JACC: Clinical Electrophysiology. Том 4. 2018. С. 1569-1579