RT Journal Article SR Electronic T1 Baseline Left-Ventricular Function During Frequent Ventricular or Atrial Ectopic Beats: Concise Communication JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 1076 OP 1079 VO 23 IS 12 A1 Kalff, V. A1 Rabinovitch, M. A. A1 Chan, W. A1 O'Neill, W. A1 Stewart, J. A1 Walton, J. A1 Pitt, B. A1 Thrall, J. H. YR 1982 UL http://jnm.snmjournals.org/content/23/12/1076.abstract AB