When Hindsight Is 20/20: Stiff Left Atrium Syndrome Masquerading as Mitral Regurgitation

Area of Science:

• Cardiology
• Cardiac Surgery
• Electrophysiology

Background:

• Atrial ablation procedures, intended to treat arrhythmias, can lead to atrial scarring.
• Atrial scarring is a known complication that may result in stiff left atrium syndrome.
• Stiff left atrium syndrome can present with symptoms that overlap with mitral valve disease.

Observation:

• A 73-year-old male patient underwent percutaneous mitral valve repair.
• Following the procedure, clinical manifestations suggestive of stiff left atrium syndrome became apparent.
• The patient's presentation mimicked symptoms typically associated with significant mitral valve pathology.

Findings:

• The case demonstrates that stiff left atrium syndrome can manifest after interventions for mitral valve disease.
• Diagnostic evaluation confirmed the presence of stiff left atrium syndrome, distinct from primary mitral valve dysfunction.
• This underscores the importance of considering iatrogenic causes of left atrial dysfunction.

Implications:

• Recognizing stiff left atrium syndrome post-ablation or post-mitral valve repair is crucial for accurate diagnosis.
• This condition requires specific management strategies distinct from those for primary mitral valve disease.
• Clinicians should maintain a high index of suspicion for stiff left atrium syndrome in patients with relevant procedural history.