What is a key characteristic of pulmonary embolism?

A key characteristic of pulmonary embolism is its relationship with deep vein thrombosis (DVT). A pulmonary embolism occurs when a blood clot, typically formed in the deep veins of the legs or other areas, travels to the lungs and occludes a pulmonary artery. This blockage can lead to significant cardiovascular complications and even death if not treated promptly.

Understanding that DVT is often the source of these clots highlights the importance of recognizing and preventing DVT in at-risk individuals as part of strategies to prevent pulmonary embolism. This connection underscores the need for awareness regarding the risk factors and signs of both conditions, thereby promoting better clinical outcomes through timely diagnosis and management.

On the other hand, the other options describe conditions that do not align with the significant aspects of pulmonary embolism. It does not primarily affect the upper respiratory tract, nor is it related to digestive system issues or infections in the heart, making them irrelevant in the context of this question.