RT Journal T1 Atrioventricular block with 2:1 conduction—discussion JF JAMA Internal Medicine JO JAMA Internal Medicine YR 2013 FD March 11 VO 173 IS 5 SP 336 OP 337 DO 10.1001/jamainternmed.2013.3182b UL http://dx.doi.org/10.1001/jamainternmed.2013.3182b AB