{{Cite journal| doi = 10.1055/s-2007-971030| issn = 0177-2309 1438-8693| volume = 23| issue = 5| pages = 174–175| last1 = Rupp| first1 = P.| last2 = Stangl| first2 = R.| title = Akute Rhythmusstörungen - Fallbeispiel 40| journal = Der Notarzt| date = 2007-10}}