Premature atrial contractions:NRat:Stdy:Heart:Qn:EKG
premature atrial contractions:nrat:stdy:heart:qn:ekg
Premature atrial contractions:Number=Count/Time:Duration of the study:Heart:Quantitative:EKG
premature atrial contractions:number=count/time:duration of the study:heart:quantitative:ekg