In accordance with one aspect of the invention, {TAIL ~ a system} for tracking {HEAD ~ ectopic beats} comprises a signal sensing unit, a signal processor, and an output device 
In accordance with one aspect of the invention , { TAIL ~ a system } for tracking { HEAD ~ ectopic beats } comprises a signal sensing unit , a signal processor , and an output device
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH