general-medicine cardiology
LDL Cholesterol — Friedewald Equation
Calculates LDL cholesterol using the Friedewald equation when direct LDL not available. LDL = Total Cholesterol − HDL − (Triglycerides ÷ 2.2) in mmol/L. Valid only when triglycerides <4.5 mmol/L. Inaccurate in hypertriglyceridaemia, type III hyperlipidaemia, or non-fasting samples.
References
- Friedewald WT et al. Estimation of the concentration of low-density lipoprotein cholesterol in plasma, without use of the preparative ultracentrifuge. Clin Chem. 1972;18(6):499–502.
Related
Curated clinical cross-links plus same-class fallbacks.
Drugs
- Simvastatin · Lipid-Lowering Agent (Statin)
- Atorvastatin (CKD Cardiovascular Risk) · Cardiovascular Risk in CKD
- Icosapent Ethyl (Omega-3 — Cardiovascular Risk Reduction) · Omega-3 Fatty Acid (Purified EPA — Eicosapentaenoic Acid Ethyl Ester)
- Lipid Emulsion 20% (Intralipid) · Antidote / Resuscitation
- Insulin (IV Infusion — ICU Glucose Control) · Insulin — ICU Glucose Management
- Sodium Chloride 3% (Hypertonic Saline) · Hypertonic Electrolyte Solution — ICP/Hyponatraemia Management
Pathways
- Falls Assessment in Older Adults · NICE CG161 2013
- Anaemia Investigation · BSH / NICE
- Lower Respiratory Tract Infection (Primary Care) · NICE NG138 / NICE antimicrobial guidance
- Hypertension Management · NICE NG136 2019
- Acute Heart Failure · ESC 2021 Heart Failure Guidelines; NICE NG106
- NSTEMI / Unstable Angina · ESC 2020 NSTEMI Guidelines; NICE NG185
Decision support only — verify against MDCalc, NICE, or your local guideline before clinical use.