Basic critical care echocardiography emphasizes two-dimensional (2D) findings, such as ventricular function, inferior vena cava size, and pericardial assessment, while generally excluding quantitative findings and Doppler-based techniques. Although this approach offers advantages, including efficiency and expedited training, it complicates attempts to understand the hemodynamic importance of any 2D abnormalities detected. Stroke volume (SV), as the summative event of the cardiac cycle, is the most pragmatic available indicator through which a clinician can rapidly determine, no matter the 2D findings, whether aberrant cardiac physiology is contributing to the state of shock. An estimate of SV allows 2D findings to be placed into better context in terms of both hemodynamic significance and acuity. This article describes the technique of SV determination, reviews common confounding factors and pitfalls, and suggests a systematic approach for using SV measurements to help integrate important 2D findings into the clinical context.

基础重症监护超声心动图强调二维 (2D) 发现，例如心室功能、下腔静脉大小和心包评估，而通常不包括定量发现和基于多普勒的技术。尽管这种方法提供了优势，包括效率和加速训练，但它使了解检测到的任何 2D 异常的血流动力学重要性的尝试变得复杂。每搏输出量 (SV) 作为心动周期的总和事件，是最实用的可用指标，临床医生可以通过该指标快速确定，无论二维结果如何，异常心脏生理学是否导致休克状态。SV 的估计允许 2D 发现在血流动力学意义和敏锐度方面被置于更好的背景中。