Blood metal concentrations and cardiac structure and function in total joint arthroplasty patients

Area of Science:

• Biomaterials science
• Cardiology
• Orthopedic surgery

Background:

• Systemic distribution of metals from total joint arthroplasty (TJA) raises concerns about potential long-term cardiotoxicity.
• Understanding the cardiac implications of metal ion release is crucial for patient safety.

Purpose of the Study:

• To investigate the association between commonly used implant metals (chromium, cobalt, titanium) and echocardiographic measures in TJA patients.
• To identify potential cardiac alterations related to elevated metal concentrations.

Main Methods:

• 110 TJA patients with elevated chromium, cobalt, or titanium levels were assessed.
• Comprehensive echocardiography (2D, 3D, Doppler, speckle-strain) was performed.
• Blood samples measured metal concentrations; regression models analyzed associations with cardiac outcomes.

Main Results:

• Higher cobalt concentrations correlated with increased left ventricular end-diastolic volume and atrial/right ventricular dilation, especially in men.
• Higher titanium concentrations were associated with reduced left ventricle global longitudinal strain and cardiac index.
• No significant changes in overall cardiac function were observed.

Conclusions:

• Elevated cobalt and titanium levels may be linked to structural and functional cardiac changes in TJA patients.
• Further longitudinal studies are necessary to elucidate the long-term systemic effects of implant metals.