| abstract |
A heart monitor includes a single chest accelerometer ( 210 ), an analog signal conditioning and sampling section ( 215 ) responsive to said accelerometer to produce a digital signal substantially representing acceleration, and a digital processor ( 220 ) operable to filter the acceleration signal into a signal affected by body motion and to cancel the body motion signal from the acceleration signal, thereby to produce an acceleration-based cardiac-related signal. Other processes and electronic systems are also disclosed. |