Jalali Mohammad, Behnam Hamid, Shojaeifard Maryam, Sani Zahra A
Department of Biomedical Engineering, Iran University of Science and Technology, Tehran, Iran.
Department of Cardiac Imaging, Rajaei Cardiovascular Medical and Research Center, Tehran, Iran.
J Med Signals Sens. 2017 Jan-Mar;7(1):49-52.
Coronary artery occlusion has a direct effect on cardiac activity and is a well-known reason for ventricular motion disorder, specifically left ventricle (LV) wall motion dysfunction. In stress echocardiography, wall motion abnormality is exaggerated when stress is applied to the heart, and therefore, it is easier to diagnose abnormality in ventricular motion. In this study, we have presented a new parameter that measures LV function. We have shown that LV function can be measured using a variation of endocard borders during a cardiac cycle in standard stress echocardiography frames. This parameter shows a meaningful difference between ischemic and normal hearts and is calculated at different heart rates (HRs). In conclusion, ischemic hearts cannot keep up with the required increase in activity when reaching peak levels of stress.
冠状动脉闭塞对心脏活动有直接影响，是心室运动障碍的一个众所周知的原因，特别是左心室（LV）壁运动功能障碍。在负荷超声心动图中，当对心脏施加负荷时，壁运动异常会加剧，因此，更容易诊断心室运动异常。在本研究中，我们提出了一种测量左心室功能的新参数。我们已经表明，在标准负荷超声心动图帧中，可使用心动周期内心内膜边界的变化来测量左心室功能。该参数在缺血性心脏和正常心脏之间显示出有意义的差异，并且是在不同心率（HRs）下计算得出的。总之，缺血性心脏在达到应激峰值水平时无法跟上所需的活动增加。
