Lung ultrasound (LUS) is a point-of-care ultrasound technique used for its portability, widespread availability, and ability to provide real-time diagnostic information and procedural guidance. LUS outperforms lung auscultation and chest X-ray, and it is an alternative to chest computed tomography in selected cases. Cardiologists may enhance their physical and echocardiographic examination with the addition of LUS. We present a practical guide to LUS, including device selection, scanning, findings, and interpretation. We outline a 3-point scanning protocol using 2-dimensional and M-mode imaging to evaluate the pleural line, pleural space, and parenchyma. We describe LUS findings and interpretation for common causes of respiratory failure. We provide guidance specific of COVID-19, which at the time of writing is a global pandemic. In this context, LUS emerges as a particularly useful tool for the diagnosis and management of patients with cardiopulmonary disease.

肺超声 (LUS) 是一种床旁超声技术，因其便携性、广泛可用性以及提供实时诊断信息和程序指导的能力而被使用。LUS 优于肺部听诊和胸部 X 光检查，在特定病例中可替代胸部计算机断层扫描。心脏病专家可以通过增加 LUS 来增强他们的身体和超声心动图检查。我们提供了 LUS 的实用指南，包括设备选择、扫描、发现和解释。我们概述了使用 2 维和 M 模式成像评估胸膜线、胸膜腔和实质的 3 点扫描协议。我们描述了 LUS 的发现和对呼吸衰竭常见原因的解释。我们提供特定于 COVID-19 的指导，在撰写本文时，它是一种全球流行病。在这种情况下，