RT Journal Article SR Electronic T1 The Cardiac Rhythms—A Systematic Approach to Interpretation JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 199 OP 200 DO 10.3122/jabfm.4.3.199b VO 4 IS 3 A1 Norris, Tom E. YR 1991 UL http://www.jabfm.org/content/4/3/199.2.abstract AB