Which of the following is seen in pulmonary thromboembolism?
**Core Concept**
Pulmonary thromboembolism (PTE) is a condition where a blood clot (thrombus) breaks loose, travels through the bloodstream, and lodges in one of the pulmonary arteries, blocking blood flow to the lungs. This can lead to various clinical manifestations due to the blockage of the pulmonary circulation.
**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of PTE, where the obstruction of a pulmonary artery leads to increased resistance in the pulmonary circuit, resulting in a decrease in cardiac output. This is due to the fact that the right ventricle has to work against the increased resistance to pump blood through the pulmonary circuit. This can lead to a decrease in systemic blood pressure, which is reflected in the clinical manifestation of **hypotension**.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not directly related to the clinical manifestations of PTE. While it's true that PTE can cause hypoxemia, it's not the most specific or direct answer.
**Option B:** This option is incorrect because while PTE can cause an increase in pulmonary artery pressure, it's not the most direct or specific clinical manifestation.
**Option C:** This option is incorrect because while PTE can cause tachypnea, it's not the most specific or direct clinical manifestation.
**Clinical Pearl / High-Yield Fact**
A key clinical correlation to remember is that PTE can present with a variety of symptoms, including sudden onset of dyspnea, chest pain, syncope, and hypotension. The diagnosis is often made based on clinical suspicion, imaging studies (CT or V/Q scan), and laboratory tests (D-dimer).
**Correct Answer:** B. Increased pulmonary artery pressure is not the correct answer, however, increased pulmonary artery pressure is indeed seen in pulmonary thromboembolism but the correct answer is **C. Tachypnea** is not the correct answer either. The most direct clinical manifestation of PTE is indeed **Hypotension** but the correct answer is not listed among the options.