Left atrial appendage function in patients with atrial flutter

Area of Science:

• Cardiology
• Medical Imaging

Background:

• Atrial flutter can be associated with atrial fibrillation, a known risk factor for thromboembolic events.
• Echocardiographic markers may help differentiate thromboembolic risk in these patients.

Purpose of the Study:

• To compare echocardiographic markers of thromboembolic risk between patients with pure atrial flutter and those with atrial flutter and intermittent atrial fibrillation.

Main Methods:

• Prospective 12-month follow-up of patients with atrial flutter to detect intermittent atrial fibrillation.
• Transthoracic and transesophageal echocardiography to assess left atrial and appendage dimensions, emptying velocities, and emptying fraction.
• Evaluation for spontaneous echo contrast.

Main Results:

• Patients with atrial flutter and intermittent atrial fibrillation had significantly larger left atrial chamber and appendage areas compared to those with pure atrial flutter.
• Lower left atrial appendage emptying fractions and velocities were observed in patients with intermittent atrial fibrillation.
• A higher incidence of spontaneous echo contrast was noted in patients with atrial flutter and intermittent atrial fibrillation.

Conclusions:

• Left atrial appendage function is impaired in patients with atrial flutter and intermittent atrial fibrillation.
• Increased spontaneous echo contrast suggests a higher thromboembolic risk in this subgroup.
• These findings support the need for adequate anticoagulant therapy in patients with atrial flutter and intermittent atrial fibrillation.