Pacemaker with neurocardiogenic syncope detection and therapy using minute ventilation input

摘要

A cardiac stimulation apparatus (10), comprising: a means (12, 14) for detecting a series of intrinsic depolarizations of the heart; a means to detect minute ventilation and respiratory rate; a means to detect a change in minute ventilation and respiratory rate for a fixed period of time; and a means (34, 36, 38, 40) for providing cardiac stimulation therapy when the means for detecting a change in minute ventilation and respiratory rate detects an increase in minute ventilation without a corresponding increase in respiratory rate for a predetermined period of time , in which the apparatus is configured to determine if an increase in minute ventilation is the result of the increased tidal volume, with a relatively fixed respiratory rate, which is defined as a difference of less than 25% in the respiratory period, R, and in which the increase in tidal volume is defined as an increase of more than 75% from the baseline.