04420000 is referenced by 49 patents and cites 7 patents.

A heart rate monitoring apparatus and related method for detecting the successive beats of a heart and providing a reliable estimate of heartbeat rate. The apparatus measures the time intervals between the successive beats and averages a prescribed number of the most recently occurring measurements. The particular measurement that differs most from the computed average is adjusted to be equal to that average, and the adjusted set of measurements is then averaged. These latter steps of adjusting and averaging are repeated a prescribed number of times, and the last-computed average is displayed as an estimate of heartbeat rate. The entire procedure is repeated upon the occurrence of each successive heartbeat.

Title
Method and apparatus for measuring heartbeat rate
Application Number
6/306329
Publication Number
4420000
Application Date
September 28, 1981
Publication Date
December 13, 1983
Inventor
Wilber H Bailey
Leucadia
CA, US
Agent
Fulwider Patton Rieber Lee & Utecht
Assignee
Camino Laboratories
CA, US
IPC
A61B 5/04
View Original Source