TY  - RPRT
TI  - P waves during ectopic atrial rhythms in man: a study utilizing atrial pacing with fixed electrodes.
AU  - W A MacLean
AU  - R B Karp
AU  - N T Kouchoukos
AU  - T N James
AU  - A L Waldo
PY  - 1975
DO  - 10.1161/01.cir.52.3.426
UR  - https://pubmed.ncbi.nlm.nih.gov/1157240/
ID  - 1157240
ER  -