A method and system for setting the operating parameters of a cardiac rhythm management device in which a plurality of parameter optimization algorithms are available. A measured feature of an electrophysiological signal such as QRS width has been shown to be useful in selecting among certain parameter...http://www.google.co.uk/patents/US7231248?utm_source=gb-gplus-sharePatent US7231248 - Resynchronization method and apparatus based on intrinsic atrial rate