Patent ID: 7966067

Claim:
A method for controlling the delivery of a cardiac contractility modulating signal to a heart of a subject within a cardiac beat cycle, the method comprising the steps of: applying electrodes to one or more ventricular sites of said heart; differentially recording a first non-local intra-cardiac electrocardiogram signal between a first ventricular electrode disposed at a first site of said one or more ventricular sites and a distant electrode implanted in said subject; differentially recording a second non-local intra-cardiac electrocardiogram signal between a second ventricular electrode disposed at a second site of said one or more ventricular sites and said distant electrode; recording a locally sensed third electrical signal from said first electrode and a locally sensed fourth electrical signal from said second electrode; processing said first electrocardiogram signal, said second electrocardiogram signal, said third signal and said fourth signal to detect a suspected ectopic electrical event within said cardiac beat cycle; and inhibiting the delivery of a cardiac contractility modulating signal to the heart upon detecting said suspected ectopic electrical event.