What is a potential outcome of untreated Pulmonary Embolism?

Untreated pulmonary embolism (PE) can lead to sudden cardiac arrest due to the obstruction of blood flow in the pulmonary arteries. When a blood clot travels to the lungs, it can significantly reduce oxygen delivery to the heart and the rest of the body. This lack of oxygen can trigger serious complications, including right ventricular failure and ultimately cardiac arrest. The heart struggles to pump blood effectively, and if the obstruction is severe, it can lead to an acute and life-threatening scenario.

The other outcomes listed, such as asthma attacks, increased lung capacity, or chronic cough, are not direct consequences of a pulmonary embolism. Asthma is primarily a condition that results from inflammation of the airways and does not result from a blood clot in the pulmonary arteries. Increased lung capacity is not a typical outcome of PE; in fact, it often results in reduced lung function. Chronic cough can happen due to various respiratory conditions, but it is not a specific or expected result of a PE, especially when left untreated. Thus, sudden cardiac arrest stands out as a serious and immediate risk of untreated pulmonary embolism.