Increased level of lipoprotein(a) predisposes to
**Core Concept**
Lipoprotein(a) [Lp(a)] is a type of lipoprotein that transports cholesterol and other lipids in the blood. Elevated levels of Lp(a) are associated with an increased risk of atherosclerotic cardiovascular disease (ASCVD) due to its prothrombotic and proatherogenic properties.
**Why the Correct Answer is Right**
The prothrombotic effect of Lp(a) is attributed to its structural similarity to plasminogen, which allows it to inhibit fibrinolysis and promote thrombosis. Additionally, Lp(a) can cause endothelial dysfunction and promote the formation of foam cells, which are characteristic of atherosclerotic plaques. The proatherogenic effect of Lp(a) is thought to be mediated by its ability to promote the uptake of oxidized LDL cholesterol by macrophages, leading to foam cell formation and atherosclerosis.
**Why Each Wrong Option is Incorrect**
**Option A:** While high levels of LDL cholesterol are a well-established risk factor for ASCVD, elevated Lp(a) levels are not simply a marker of high LDL cholesterol levels. Instead, they are associated with a distinct prothrombotic and proatherogenic risk.
**Option B:** Elevated Lp(a) levels are not directly associated with an increased risk of hypertension. While hypertension is a major risk factor for ASCVD, it is not the primary mechanism by which elevated Lp(a) levels contribute to cardiovascular disease.
**Option C:** While Lp(a) levels may be elevated in individuals with chronic kidney disease, this is not the primary mechanism by which elevated Lp(a) levels contribute to ASCVD. Elevated Lp(a) levels are a independent risk factor for ASCVD, regardless of kidney function.
**Clinical Pearl / High-Yield Fact**
The Lp(a) level is a useful marker for identifying individuals at increased risk of ASCVD, particularly in those with a family history of early cardiovascular disease. A level above 30 mg/dL is generally considered elevated and warrants further evaluation and management.
**Correct Answer: C. Thrombotic events, such as myocardial infarction and stroke.**