Overview
Fibrosis around cardiac pacemaker electrodes can impair cardiac function and potentially lead to arrhythmias by altering conduction properties and increasing fibrotic tissue burden 123.Diagnosis
Elevated inflammatory markers (e.g., interleukin-1β, interleukin-6) may indicate ongoing fibrotic processes 1.
Echocardiography to assess cardiac function and structural changes 1.
Sircol collagen assays to quantify fibrosis 1.
Optical mapping to evaluate conduction velocity alterations in experimental models 2.Management
First-line treatments: No specific pharmacological treatments mentioned for fibrosis around pacemaker electrodes.
Adjunctive approaches: Investigate potential use of loureirin B (10 mg/kg/day) to inhibit fibrotic progression and improve cardiac function, though clinical application requires further validation 1.Special Populations
Pregnancy: No specific data provided.
Pediatrics: No specific data provided.
Elderly: No specific data provided.
Comorbidities: Interactions with existing cardiac pathologies may exacerbate fibrotic effects; close monitoring recommended 13.Key Recommendations
Monitor inflammatory markers and cardiac function regularly in patients with cardiac pacemaker electrodes to detect early signs of fibrosis 1. (Evidence: Moderate)
Consider experimental therapeutic approaches targeting fibrotic pathways, such as loureirin B, under close clinical supervision, given the potential benefits observed in preclinical models 1. (Evidence: Weak)
Employ optical mapping techniques in research settings to better understand the impact of fibrosis on conduction velocity and arrhythmogenic potential 2. (Evidence: Weak)References
1 Cheng M, Yang Z, Li R, Wu G, Zhang C. Loureirin B alleviates cardiac fibrosis by suppressing Pin1/TGF-β1 signaling. European journal of pharmacology 2022. link
2 Kostecki GM, Shi Y, Chen CS, Reich DH, Entcheva E, Tung L. Optogenetic current in myofibroblasts acutely alters electrophysiology and conduction of co-cultured cardiomyocytes. Scientific reports 2021. link
3 Greisas A, Zlochiver S. The Multi-Domain Fibroblast/Myocyte Coupling in the Cardiac Tissue: A Theoretical Study. Cardiovascular engineering and technology 2016. link