Relationship between systolic time intervals and heart rate during atrial or ventricular pacing in normal subjects.
Relationship between systolic time intervals and heart rate during atrial or ventricular pacing in normal subjects.
复制标题
正常受试者心房或心室起搏期间收缩时间间隔与心率之间的关系。
DOI：
--
复制
发表时间：
1980
期刊：
影响因子：
--
通讯作者：
B. Trimarco
中科院分区：
文献类型：
--
作者：
G. Ferro;B. Ricciardelli;L. Saccá;M. Chiariello;M. Volpe;M. Tari;B. Trimarco
收缩时间间隔（STI）被认为是许多心脏病中心脏功能的良好指标。然而，必须考虑到它们在时间上与心脏收缩周期相关，因此可能会因心率变化而改变。因此，有必要定义STI和心率变化之间可能的关系。在这项研究中，心率的变化是由心房和心室起搏引起的。心动过速导致左心室射血时间 (LVET) 成比例减少（心房起搏的 y=275.142-1.0025 x，r=0.76，p 小于 0.001，心室起搏的 y=298.28-0.691 x，r=-0.75，p 小于 0.001），但没有改变射血前周期(PEP) 和等长收缩时间 (ICT) 和机电间隔 (QS1)。这些结果表明，虽然 LVET 必须针对心率的变化进行校正，但无需校正 PEP 和 ICT。
Systolic time intervals (STI) are regarded as good indices of cardiac performance in many heart diseases. It must be considered, however, that they are temporally related to the cardiac contraction cycle and, therefore, may be modified by heart rate changes. Thus, it is necessary to define the possible relationship between STI and heart rate changes. In this study, changes in heart rate were induced by atrial and ventricular pacing. Tachycardia caused a proportional decrease of left ventricular ejection time (LVET) (y=275.142-1.0025 x, r=0.76, p less than 0.001 for atrial pacing and y=298.28-0.691 x, r=-0.75, p less than 0.001 for ventricular pacing, respectively), but did not modify the pre-ejection period (PEP) and the isometric contraction time (ICT) and the electromechanical interval (QS1). These results demonstrate that while LVET must be corrected for the changes in heart rate, no correction of PEP and ICT is necessary.