Centre for Biomedical Sciences Education, Queen's University, Belfast, Northern Ireland
Centre for Biomedical Sciences Education, Queen's University, Belfast, Northern Ireland.
Adv Physiol Educ. 2016 Sep;40(3):354-8. doi: 10.1152/advan.00011.2016.
This laboratory session provides hands-on experience for students to visualize the beating human heart with ultrasound imaging. Simple views are obtained from which students can directly measure important cardiac dimensions in systole and diastole. This allows students to derive, from first principles, important measures of cardiac function, such as stroke volume, ejection fraction, and cardiac output. By repeating the measurements from a subject after a brief exercise period, an increase in stroke volume and ejection fraction are easily demonstrable, potentially with or without an increase in left ventricular end-diastolic volume (which indicates preload). Thus, factors that affect cardiac performance can readily be discussed. This activity may be performed as a practical demonstration and visualized using an overhead projector or networked computers, concentrating on using the ultrasound images to teach basic physiological principles. This has proved to be highly popular with students, who reported a significant improvement in their understanding of Frank-Starling's law of the heart with ultrasound imaging.
本实验课程为学生提供了使用超声成像观察跳动人心的实践经验。可以从简单的视图中直接测量收缩期和舒张期的重要心脏尺寸。这使学生能够从第一性原理推导出重要的心脏功能指标，如心搏量、射血分数和心输出量。通过在短暂的运动后对同一受试者进行重复测量，可以很容易地证明心搏量和射血分数的增加，可能会或不会增加左心室舒张末期容积（表示前负荷）。因此，可以方便地讨论影响心脏性能的因素。该活动可以作为实际演示进行，使用投影仪或联网计算机进行可视化，重点是使用超声图像教授基本生理原理。这在学生中非常受欢迎，他们报告说，使用超声成像对他们理解心脏的弗兰克-斯塔尔定律有了显著的提高。
