TY  - RPRT
TI  - Concealed extrasystolic ventricular bigeminy with interpolation.
AU  - P R Lightfoot
PY  - 1975
DO  - 10.1378/chest.67.3.373
UR  - https://pubmed.ncbi.nlm.nih.gov/46194/
ID  - 46194
ER  -