1. http://www.oxforddictionaries.com/definition/english/arrhythmia
2. http://www.oxforddictionaries.com/us/definition/english/asystole
3. Kühn CG Claudii Galeni Opera Omnia. Leipzig: C. Cnobloch, 1821-1833, rpt. Hildesheim: Georg Olms, 1964-5 Editio Kuchniana Lipsiae
4. Galen On the use of the pulse Furley DJ Wilkie JS On Respiration and the Arteries Princeton 1984 222 225
5. Arrhythmia prevails;Krikler;Anaesthesia,1988