Raised serum level of lipoprotein-(a) is a predictor of
**Core Concept**
Raised serum levels of lipoprotein(a) [Lp(a)] are associated with increased risk of cardiovascular diseases, primarily due to its atherogenic and thrombogenic properties. Lp(a) is a type of lipoprotein that resembles low-density lipoprotein (LDL) but contains an additional protein, apolipoprotein(a). Elevated Lp(a) levels are thought to contribute to the development of atherosclerosis by promoting lipid accumulation in the arterial wall and enhancing platelet activation and aggregation.
**Why the Correct Answer is Right**
Elevated Lp(a) levels are a known risk factor for coronary artery disease (CAD), ischemic stroke, and peripheral artery disease. The exact mechanism of Lp(a)-mediated atherogenesis is not fully understood, but it is believed to involve the oxidation of Lp(a), which leads to the formation of foam cells and the activation of inflammatory pathways. Furthermore, Lp(a) has been shown to inhibit plasminogen activation, thereby promoting thrombosis.
**Why Each Wrong Option is Incorrect**
* **Option A:** Elevated Lp(a) is not a direct predictor of hypertension. While hypertension is a major risk factor for cardiovascular disease, Lp(a) levels are not a direct measure of blood pressure.
* **Option B:** Elevated Lp(a) is not a specific predictor of type 2 diabetes. While both conditions are associated with insulin resistance and metabolic syndrome, Lp(a) levels are not a direct measure of glucose metabolism.
* **Option C:** Elevated Lp(a) is not a specific predictor of chronic kidney disease. While both conditions are associated with cardiovascular disease, Lp(a) levels are not a direct measure of renal function.
**Clinical Pearl / High-Yield Fact**
Elevated Lp(a) levels are a heritable trait, and individuals with a family history of high Lp(a) levels are more likely to have elevated levels themselves. Screening for Lp(a) is not currently recommended in the general population, but it may be considered in individuals with a strong family history of cardiovascular disease.
**Correct Answer: C. Coronary artery disease (CAD)**