Diastolic rumbles in normally functioning porcine mitral valves

Area of Science:

• Cardiovascular Medicine
• Biomedical Engineering
• Prosthetic Valve Research

Background:

• Porcine prosthetic valves are widely used in mitral valve replacement.
• Understanding the acoustic characteristics of normally functioning valves is crucial for accurate diagnosis.
• Distinguishing physiological sounds from pathological murmurs is a clinical challenge.

Purpose of the Study:

• To investigate the prevalence of diastolic rumbles and opening snaps in patients with normally functioning mitral porcine prosthetic valves.
• To identify factors contributing to the production of these acoustic phenomena.
• To inform clinicians about the acoustic profile of healthy porcine valves.

Main Methods:

• Phonocardiogram and auscultation were used to assess valve sounds.
• A cohort of 22 patients with mitral porcine prosthetic valves was studied.
• Correlation analysis was performed to identify contributing factors.

Main Results:

• 14 out of 22 patients (64%) exhibited apical diastolic rumbles.
• 6 out of 22 patients (27%) had opening snaps.
• Central flow, a flexible stent, and biologic material were associated with diastolic rumbles.

Conclusions:

• Diastolic murmurs and opening snaps can be normal findings in functioning mitral porcine prosthetic valves.
• Clinicians must be aware of these sounds to avoid misdiagnosis.
• Valve design and material properties influence acoustic characteristics.