Haemorrhagic infarct may be seen in –
**Core Concept**
Haemorrhagic infarct occurs due to the rupture of blood vessels in the infarcted area, leading to bleeding into the tissue. This is often seen in specific types of arterial occlusions or in areas with compromised vascular integrity.
**Why the Correct Answer is Right**
Haemorrhagic infarcts are typically associated with embolic occlusions, particularly those caused by air or gas bubbles. When an air embolus lodges in a small artery, it can cause endothelial damage and subsequent bleeding. This is because air is not compressible and can lead to severe vascular damage. Additionally, areas with pre-existing vascular disease or atherosclerosis may also be more prone to haemorrhagic infarcts due to the weakening of the arterial wall.
**Why Each Wrong Option is Incorrect**
**Option A:** Haemorrhagic infarcts are not typically seen in thrombotic occlusions, which are more commonly associated with ischemic infarcts. Thrombi tend to occlude the vessel more gradually, minimizing the risk of vascular rupture.
**Option B:** While haemorrhagic infarcts can occur in areas with compromised vascular integrity, they are not exclusively seen in areas with diabetes or atherosclerosis. Other factors, such as embolic occlusions, also play a significant role.
**Option C:** Haemorrhagic infarcts are not typically seen in venous occlusions, which are more commonly associated with deep vein thrombosis or pulmonary embolism. Venous occlusions tend to cause stasis and congestion rather than vascular rupture.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that haemorrhagic infarcts can be a sign of air or gas embolism, which requires prompt recognition and treatment to prevent further complications.
**Correct Answer: D.**