Austin flint murmur associated with a disc mitral valve prosthesis. A case report

Area of Science:

• Cardiovascular Surgery
• Biomedical Engineering
• Clinical Cardiology

Background:

• Mitral valve replacement with prosthetic devices like the Björk-Shiley disc valve is a common cardiac surgical procedure.
• Aortic insufficiency can complicate cardiac surgeries and impact prosthetic valve function.
• Hemodynamic changes post-mitral valve replacement can unmask or worsen pre-existing conditions.

Observation:

• A case involving a Björk-Shiley disc valve in the mitral position is presented.
• The prosthetic valve's movement was observed to be hindered by aortic insufficiency.
• The severity of aortic insufficiency appeared to increase following mitral valve replacement.

Findings:

• The aortic regurgitant jet interfered with normal disc motion of the mitral valve prosthesis.
• This mechanical interference led to the development of Austin Flint and systolic murmurs.
• A secondary complication of hemolytic anemia was identified, linked to the abnormal valve function.

Implications:

• Echocardiography is a valuable non-invasive tool for assessing prosthetic valve function and correlating it with audible sounds.
• Understanding the interplay between prosthetic valve mechanics and valvular pathology is crucial for patient management.
• This case highlights the potential complications arising from combined valvular defects and prosthetic device interactions.