Low-density lipoprotein cholesterol (LDL-C) is a major cardiovascular risk factor and an indicator of hypolipidemic therapy effectiveness. However, direct and calculated methods for determining "LDL-C Show more
Low-density lipoprotein cholesterol (LDL-C) is a major cardiovascular risk factor and an indicator of hypolipidemic therapy effectiveness. However, direct and calculated methods for determining "LDL-C" present the sum of the cholesterol in all apoB-containing lipoproteins, including lipoprotein(a) [Lp(a)]. There has been an ongoing debate about the correctness of LDL-C in patients with elevated Lp(a) concentrations up to now. The aim of this study was to evaluate the effect of Lp(a) concentration on the LDL-C calculated by different equations. The study included the results of fasting lipids and Lp(a) concentration of 566 measurements from 283 patients (before and after lipid-lowering therapy prescribing, after exclusion of 17 patients with incomplete data). LDL-C and LDL-C corrected for Lp(a)-cholesterol (LDL-C We assessed 566 measurements of lipids and Lp(a). The number of values reclassified to a higher risk category was 10% and 13% with Martin-Hopkins and Sampson equations compared to the Friedewald formula. The percentage of Lp(a)-cholesterol (Lp(a)-C) in the LDL-C calculated by three formulas was up to 90% or more depending on the concentration of LDL-C and Lp(a). When stratified by clinically significant LDL-C thresholds, the proportion of values LDL-C Comparison of LDL-C concentrations calculated by Friedewald, Martin-Hopkins, and Sampson equations showed high consistency in patients without elevated triglycerides. The LDLcorr is reasonable to use in patients with Lp(a) concentration ≥ 30 and ≥41 mg/dL when using the Martin-Hopkins and Sampson equations, respectively. These data may help clinicians interpret LDL-C goal attainment in patients with elevated Lp(a) and avoid misclassification driven by the Lp(a)-cholesterol component. Show less
Peripheral artery disease (PAD) is a major global health issue. This study investigated the relationship between lipoprotein(a) [Lp(a)], high-density lipoprotein cholesterol (HDL-C) to blood cells rat Show more
Peripheral artery disease (PAD) is a major global health issue. This study investigated the relationship between lipoprotein(a) [Lp(a)], high-density lipoprotein cholesterol (HDL-C) to blood cells ratios, and PAD development. The study included 361 patients categorized into groups based on the presence of stenotic atherosclerosis in lower limb arteries (LLAs) diagnosed via duplex ultrasound. Group 1 (n = 238) had atherosclerosis at the first visit. A second visit involved 281 patients: 158 from Group 1, 32 new diagnoses (Group 2), and 91 with no atherosclerosis at either visit (Group 3). Laboratory analysis included lipid profiles, Lp(a), and complete blood counts, calculating ratios like Lp(a)/HDL-C and monocyte-to-HDL-C ratio (MHR). Showed patients with stenotic atherosclerosis had significantly higher Lp(a) (20.2 vs. 12.1 mg/dL, Show less