Relation of the atrial input sites to the dual atrioventricular nodal pathways: crossing of conduction curves generated with posterior and anterior pacing
Tchou PJ, Cheng YN, Mowrey K, Efimov IR, Van Wagoner DR, Mazgalev TN
J Cardiovasc Electrophysiol. 1997 Oct;8(10):1133-44 [PubMed]