# Correlation of troponin I and CK-MB with COVID-19 severity in seriously ill patients: A retrospective analysis from medical records

**Authors:** Jyoti Shukla, Ritesh Yadav, Divyansh Gupta, Pankaj Sharma, Nishant Singh Verma

PMC · DOI: 10.6026/973206300214585 · 2025-12-15

## TL;DR

This study found that higher levels of troponin I and CK-MB in seriously ill COVID-19 patients are linked to more severe disease.

## Contribution

The study establishes a strong correlation between elevated troponin I and CK-MB levels and disease severity in hospitalized COVID-19 patients.

## Key findings

- Severe COVID-19 cases had significantly higher cTnI and CK-MB levels (p < 0.001).
- Elevated biomarker levels at admission correlate with disease severity in seriously ill patients.
- Troponin I and CK-MB serve as early prognostic indicators for risk assessment in COVID-19.

## Abstract

COVID-19 is frequently associated with cardiovascular complications, with cardiac troponin I (cTnI) and CK-MB serving as markers of
myocardial injury. Therefore, it is of interest to analyse of medical records from 300 PCR-confirmed COVID-19 patients admitted to High
Dependency Unit (HDU) and Intensive Care Unit (ICU) during the second wave (2020-2021), biomarker levels at admission were correlated with
disease severity. All patients included were seriously ill but survived. Severe cases had significantly higher cTnI and CK-MB levels
(p < 0.001). These biomarkers provide important early prognostic information For the purpose of risk assessment and therapeutic treatment
of COVID-19.

## Linked entities

- **Proteins:** LOC105904758 (troponin I, fast skeletal muscle-like), ckmb (creatine kinase, muscle b)
- **Diseases:** COVID-19 (MONDO:0100096)

## Full-text entities

- **Genes:** TNNI3 (troponin I3, cardiac type) [NCBI Gene 7137] {aka CMD1FF, CMD2A, CMH7, RCM1, TNNC1, cTnI}
- **Diseases:** cardiovascular complications (MESH:D002318), myocardial injury (MESH:D009202), COVID-19 (MESH:D000086382)
- **Species:** Homo sapiens (human, species) [taxon 9606]

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Source: https://tomesphere.com/paper/PMC13018330