- References
Catharina Serafin .[1] was a Prussian lady who had an enchondroma removed from her cardiac region, leaving the chest wall open except from a thin skin layer. This allowed the German physician Hugo von Ziemssen in 1892 to do the first cardiac pacing experiments ever, giving understanding to how the heart works electrically. References1. ^{{cite book |last1=Mahapatra |first1=Srijoy |authorlink1=Srijoy Mahapatra|title=History of Cardiac Pacing|year=2009|publisher=Springer-Verlag|doi=10.1007/978-0-387-79403-7_1}}
{{DEFAULTSORT:Serafin, Catharina}} 1 : Pulmonology and respiratory therapy organizations |