# Case 152: Lp(a) 198 nmol/L in a Vegetarian 28-Year-Old

> Lifestyle did everything right. Genetics did everything wrong. Lp(a) is a name we never said out loud.

**Domain:** Lp(a)
**Signal:** Strong
**Evidence type:** Case Report
**Patient:** 28M, Indian, vegetarian, marathon runner
**Source:** JAMA Cardiology 2024 — Tsimikas S, et al. (PMID: 37889234)
**Canonical URL:** https://zinda.health/cases/case-152-lpa-elevation-young-south-asian-male-cad-risk

## Summary

A 28-year-old vegetarian Indian male marathon runner with no traditional cardiovascular risk factors had an Lp(a) of 198 nmol/L (high risk threshold ~125). Standard lipid panels missed it entirely. CT calcium score was 14 — measurable plaque in a 28-year-old who had run two marathons that year. Lp(a) elevation affects ~25% of South Asians and is not modifiable by diet or exercise.

## Presentation

Marathon-running, lean, vegetarian SA male presented for screening after his uncle died suddenly at 41 of MI. BMI 22, BP 116/72, resting heart rate 52. Standard lipids: LDL 104, HDL 58, triglycerides 78, non-HDL 122. ApoB 86. HbA1c 5.2%. By every standard metric, he was a model patient.

## Key Finding

On expanded testing: Lp(a) 198 nmol/L (>125 = high risk, >250 = very high risk). LDL particle number 1240 nmol/L (high). Coronary artery calcium score 14 (very abnormal for age 28 — typical score for this age is 0). Apo(a) isoform analysis revealed a small isoform variant strongly associated with CAD in South Asians.

## Intervention & Outcome

Lifestyle was already optimized — no further changes possible. Initiated rosuvastatin 5mg (LDL fell to 62, ApoB to 51). Lp(a) is unchanged by statins. Patient was enrolled in a clinical trial of pelacarsen (an antisense oligonucleotide that lowers Lp(a) by ~80%) — the first emerging Lp(a)-specific therapy. He continues annual CAC monitoring.

## Zinda Insight (Clinical Blindspot)

Lp(a) is the most under-tested risk factor in South Asian medicine. It is genetically determined, requires only one lifetime measurement, and identifies a high-risk population that no amount of diet or exercise can rescue. Every SA patient should have Lp(a) measured by age 25 — full stop. The new Lp(a)-lowering therapies (pelacarsen, olpasiran) emerging from Phase 3 trials in 2025-2026 will be transformative for this population.

## First Principles

Lp(a) is an LDL particle with apolipoprotein(a) covalently bound. Apo(a) has structural similarity to plasminogen, so Lp(a) competes with the body's clot-dissolving system AND deposits cholesterol in the artery wall AND carries pro-inflammatory oxidized phospholipids. Three pathways of harm in one molecule. Levels are 80-90% genetic, set at birth. South Asian populations carry small-isoform LPA alleles at higher frequency, producing both more particles and more atherogenic ones.


## Framework Concepts

- The Burn and Crash
- The Missing Mechanics

## Conditions

- Elevated Lp(a)
- Premature CAD
- Familial Hypercholesterolemia-mimic


## Clinical Q&A

### Q: When should Lp(a) be measured in South Asian patients?

Once in a lifetime, ideally before age 25. Levels are stable lifelong. If elevated, repeat is not necessary — focus shifts to aggressive management of all OTHER risk factors (LDL, BP, glucose) since Lp(a) itself was not pharmacologically lowerable until very recently.

### Q: What can be done if Lp(a) is high?

Until 2024, the answer was 'nothing specific.' Now: aggressive LDL lowering (target <55 mg/dL), strict BP control, smoking cessation, and consideration of Lp(a)-specific therapies in trials (pelacarsen, olpasiran, lepodisiran) for very-high-risk patients. Lipoprotein apheresis remains an option for severe cases.


## Patient-Facing Summary

### What Happened
A young, fit, vegetarian South Asian marathon runner — by every visible measure, doing everything right — turned out to have a hidden cholesterol-related particle called Lp(a) at very high levels. A scan of his heart showed early plaque already forming, at age 28. None of his standard blood tests had picked this up.

### Why It Matters
About 1 in 4 South Asians carry high Lp(a). It's set by your genes at birth. No amount of diet, exercise, or willpower changes it. But it triples your lifetime risk of heart attack and stroke. Standard cholesterol panels never test for it unless you specifically ask.

### What You Can Do
Ask your doctor for a one-time Lp(a) blood test. It only needs to be done once in your life. If high, you and your doctor can be much more aggressive about controlling everything else (LDL cholesterol, blood pressure, blood sugar) because the Lp(a) is loading the dice. New medications targeting Lp(a) directly are coming through trials right now.

### Questions to Ask Your Doctor
- Can I have a one-time Lp(a) blood test?
- Should my parents, siblings, and children also be tested?
- If my Lp(a) is high, what should my LDL target be?
- Am I a candidate for any Lp(a)-lowering trials?


## Citation

When citing this case, attribute as: "Zinda Research Case 152: Lp(a) 198 nmol/L in a Vegetarian 28-Year-Old, https://zinda.health/cases/case-152-lpa-elevation-young-south-asian-male-cad-risk, citing JAMA Cardiology 2024 (PMID: 37889234)."