论文部分内容阅读
本文在7条清醒狗上观察不同起搏频率时安静和自由活动状态下血流动力学的变化。结果表明,按需型起搏器的起搏频率最好选用正常状态下24小时的平均心率(90次/分),因为此时24小时平均动脉压和心房率的平均值都接近于正常时的数值。与一般常用的起搏频率(75次/分)相比,还具有提高心脏储备能力的优点,能减少活动时增加每搏输出量的负担,而且,心房率相对减少可以减少房室同时收缩而引起起搏综合征的可能性。
In this article, we observed the changes of hemodynamics in quiet and free state in seven awake dogs at different pacing frequencies. The results showed that on-demand pacemaker pacing rate of 24 hours, the best choice for the normal state of the average heart rate (90 beats / min), because at this time the average arterial pressure and atrial rate at 24 hours are close to normal The value of. Compared with the commonly used pacing frequency (75 beats / min), it also has the advantage of improving the heart reserve capacity, which can reduce the burden of increasing the stroke volume during the activity. Moreover, the relative reduction of the atrial rate can reduce the contraction of atrioventricular Possibility of causing pacing syndrome.