The Importance of Measuring Troponin in Chronic Obstructive Pulmonary Disease Exacerbations: A Systematic Review.

Chronic obstructive pulmonary disease (COPD) is one of the leading causes of death worldwide. Many patients with acute exacerbations need intensive care. There are many cardiovascular risk factors and comorbid conditions linked with COPD. Troponin elevation is used for the diagnosis of myocardial infarction. However, it is commonly elevated in patients with COPD. This systematic review followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. PubMed and Scopus were searched for relevant articles. A total of 383 papers were identified. Out of the 383 papers, only 30 papers remained for final synthesis after removing duplicates, screening for relevant articles, and assessing eligibility criteria. After the quality appraisal, 11 papers were chosen for inclusion in this study. COPD is characterized by obstruction and inflammation of the airways. It is caused mainly by smoking, by causing harmful changes in the structure of the airways. It usually presents with dyspnea, cough, and/or production of sputum. Troponins are regulatory proteins found in the myocardium and skeletal muscles. The cause of its elevation in COPD and acute exacerbated chronic obstructive pulmonary disease (AECOPD) remains unclear. However, several reasons and factors have been suggested. The most intriguing fact is that high troponin in COPD, especially in exacerbations, has been linked in many articles to a higher risk of death. Furthermore, it could serve as a tool for better assessment and management of COPD patients. We found that troponin predicts death and poor outcomes in COPD and AECOPD. The exact mechanism of its elevations is not clear. We believe it can be a valuable tool for clinicians in better managing COPD and assessing the severity of the exacerbations.