A method and apparatus for diagnosing the vulnerability of a patient's heart to lethal cardiac arrhythmias uses on-line comparison of the beat timing vectors with the stored vectors of a number of previous beats and analyzing the vector differences according to a chaos techniques to obtain an indication...http://www.google.com.au/patents/US5201321?utm_source=gb-gplus-sharePatent US5201321 - Method and apparatus for diagnosing vulnerability to lethal cardiac arrhythmias
