subpulse

例句：

1. 1. The subpulse of the heartbeat is measured to determine its rhythm.
   通过测量心跳的次脉冲来测定其节律。
2. 2. The subpulse technique is used in medical imaging to enhance image quality.
   次脉冲技术被用于医疗成像中以提升图像质量。
3. 3.During atrial fibrillation, the subpulse can be irregular and cause confusion.
   在心房颤动期间，次脉冲可能不规则，导致混淆。