公开(公告)号：US4945909A

公开(公告)日：1990-08-07

申请号：US362064

申请日：1989-06-06

申请人： Neal E. Fearnot ,  Kevin S. Heggs ,  William L. Johnson ,  Donald A. Stevens

发明人： Neal E. Fearnot ,  Kevin S. Heggs ,  William L. Johnson ,  Donald A. Stevens

IPC分类号： A61N1/362 ,  A61N1/365

CPC分类号： A61N1/3622 ,  A61N1/36585

摘要： A pacemaker is disclosed with a pacing rate that is restricted within a range defined by variable upper and lower rate limits that change as a function of the patient's detected level of activity. An indication such as the nonambient temperature of blood is sensed in the right ventricle of the heart to indicate detected activity level. Other activity indications, such as blood oxygen concentration and body motion, either singly or in combination are also disclosed. A control circuit of the pacemaker varies the upper and lower rate limits according to the patient's detected level of activity. The control circuit also varies the atrial and ventricular refractory periods along with the AV delay period in response to detected activity level changes.

摘要翻译： 披露起搏器，起搏速度受限于可变上限和下限速率限定的范围内，该范围随患者检测到的活动水平而变化。 在心脏的右心室中感测到诸如血液的非客体温度的指示，以指示检测到的活动水平。 还公开了单独或组合的其它活性指示，例如血氧浓度和身体运动。 起搏器的控制电路根据患者检测到的活动水平来改变上限和下限速率。 响应于检测到的活动水平变化，控制电路还随着AV延迟周期改变心房和心室不应期。

公开(公告)号：US4905697A

公开(公告)日：1990-03-06

申请号：US310852

申请日：1989-02-14

申请人： Kevin S. Heggs ,  William L. Johnson ,  Donald A. Stevens

发明人： Kevin S. Heggs ,  William L. Johnson ,  Donald A. Stevens

IPC分类号： A61N1/365

CPC分类号： A61N1/36585

摘要： Method and appartaus are disclosed for stimulating the heart with a pacemaker in response to a nonambient temperature of a body, which is sensed, for example, in the right ventricle of the heart. The pacemaker stimulates the heart at one of at least three different nominal rates which have been selected by the physician for the various activity levels of the patient. When the heart is stimulated at an interim rate for mild or brief exercise conditions, the activity level of the patient is sensed using a motion sensor. A control circuit terminates a predetermined time period selected for the pacemaker to stimulate at the interim rate when the sensed level is less than a predetermined activity level. The stimulation rate of the heart is controlled by the nonambient body temperature sensed in the right ventricle of the heart, but the sensed motion or activity level of the patient is used to terminate the interim time period when the sensed activity level of the patient does not correspond to the level of activity intended for the selected stimulation rate.

摘要翻译： 公开了方法和惯例，以响应于例如在心脏的右心室感测到的身体的非客体温度，用起搏器刺激心脏。 心脏起搏器以至少三种不同的名义速率刺激心脏，这些速率由医师为患者的各种活动水平选择。 当以温和或短暂的运动条件的临时速率刺激心脏时，使用运动传感器感测患者的活动水平。 当感测到的水平小于预定的活动水平时，控制电路终止为起搏器选择的预定时间段以临时速率刺激。 心脏的刺激速率由在心脏右心室感测到的非外界体温控制，但是当感测到的患者活动水平不是时，患者的感测运动或活动水平被用于终止临时时间段 对应于所选刺激速率的活动水平。