%0 Journal Article %A G CsapĆ³ %T Role of ventricular premature beats in initiation and termination of atrial arrhythmias. %D 1971 %R 10.1136/hrt.33.1.105 %J British Heart Journal %P 105-110 %V 33 %N 1 %U https://heart.bmj.com/content/heartjnl/33/1/105.full.pdf