Patent ID: 6754534
Filing Date: 2004-06-22
Classification: A61N

Abstract:
A method including:(a) computing a current interval between successive cardiac events obtained from a commonly shared first sensing channel that is coupled to two different heart chambers on different sides of a heart to detect the events occurring in at least one of (1) both right and left ventricles, and (2) both right and left atria; (b) classifying each of a previous and the current intervals as â€œlongâ€  if the interval is longer than a first duration, and as â€œshortâ€  if the interval is shorter than the first duration; (c) incrementing a counter value, if the previous interval is long and the current interval is short and the counter value is less than a maximum counter value; (d) decrementing the counter value, if the counter value exceeds a minimum counter value and either (1) the previous interval is long and the current interval is long, or (2) the previous interval is short and the current interval is short; (e) leaving the counter at its existing value, if either (1) the previous interval is long and the current interval is long, or (2) the previous interval is short and the current interval is short; and (f) determining timing of delivery of therapy based on intervals between cardiac events, but ignoring the current interval if the counter value is equal to the maximum counter value.