Cardiac function, inflammatory mediators and mortality in critical limb ischemia

Area of Science:

• Cardiology
• Vascular Medicine
• Inflammation Research

Background:

• Critical limb ischemia (CLI) often coexists with coronary heart disease and congestive heart failure.
• Understanding the interplay between cardiac function, inflammation, and outcomes in CLI is crucial.

Purpose of the Study:

• To evaluate cardiac function in relation to inflammatory markers and one-year mortality in patients with CLI.
• To investigate the association between specific cardiac abnormalities and inflammatory mediators.

Main Methods:

• Prospective study of 232 CLI patients.
• Electrocardiogram (ECG), plasma inflammatory markers (ET-1, TNFα, IL-6, neopterin, CD40 ligand, 8-epi-PGF2α), and echocardiography (in 88 patients).
• One-year mortality assessment.

Main Results:

• Ischemic ECG changes were associated with higher endothelin-1, 8-epi-PGF2α, neopterin levels, and increased one-year mortality.
• Atrial fibrillation/flutter correlated with higher IL-6 and neopterin.
• Echocardiographic findings of heart failure correlated with inflammatory markers (IL-6, TNFα, neopterin).
• Lower ejection fraction (<40%) predicted higher one-year mortality.

Conclusions:

• Cardiac rhythm disturbances and ischemic ECG changes in CLI patients are linked to inflammatory mediators.
• These cardiac abnormalities and inflammatory markers predict one-year mortality in CLI.
• Inflammatory markers correlate with echocardiographic evidence of heart failure in CLI patients.