Relationship between quantitative CT and cardiac function in patients with severe COPD exacerbations (ECOPD)

Area of Science:

• Pulmonary Medicine
• Cardiology
• Radiology

Background:

• Quantitative CT metrics like emphysema, gas trapping, and airway wall thickness correlate with COPD severity and exacerbation risk.
• Cardiac disease is often undiagnosed in COPD patients, and the risk of cardiac events post-hospitalized exacerbations (ECOPD) is high.
• CT scans during ECOPD may aid in identifying patients with concurrent heart disease.

Purpose of the Study:

• To investigate the correlation between quantitative CT findings during ECOPD and cardiac assessment results.
• To explore the potential of CT scans as an opportunistic screening tool for cardiac conditions in COPD patients.

Main Methods:

• The SCATECOPD study enrolled patients with ECOPD who underwent comprehensive cardiac assessments (ECG, echocardiogram, CT coronary calcium score) and CT chest imaging.
• Quantitative CT parameters including expiratory gas trapping (Exp%856), emphysema (Insp%950), and airway wall thickness (Pi10) were measured.
• These CT metrics were compared with clinical data and cardiac assessment findings.

Main Results:

• 56 participants with moderate-to-severe COPD (mean FEV1 50.6% predicted) were analyzed.
• Cardiac assessments revealed new diagnoses in a significant proportion of patients: 8.9% for moderate-severe left ventricular systolic dysfunction (LVSD), 23.2% for heart failure without LVSD, and 14.3% for right heart failure.
• Severe coronary artery disease was present in 43.1%. Airway wall thickness (Pi10) showed a significant negative correlation with left ventricular ejection fraction.

Conclusions:

• Quantitative CT imaging during ECOPD provides opportunistic insights into cardiac health, particularly via airway wall thickness (Pi10).
• Further research is needed to validate CT's utility as a screening tool for cardiac conditions in hospitalized COPD patients.