Echocardiographic findings in atrial flutter.

Area of Science:

• Cardiology
• Medical Imaging
• Electrophysiology

Background:

• Atrial fibrillation and atrial flutter are common arrhythmias affecting cardiac function.
• Distinguishing between these arrhythmias can be challenging, especially with non-diagnostic electrocardiograms.
• Echocardiography offers a non-invasive method to visualize cardiac structures and dynamics.

Purpose of the Study:

• To investigate the echocardiographic findings in patients with atrial fibrillation and atrial flutter.
• To determine if echocardiography can differentiate between atrial flutter and different types of atrial fibrillation.
• To assess the diagnostic utility of echocardiography in cases of uncertain electrocardiographic findings.

Main Methods:

• Echocardiographic studies were conducted on 22 patients diagnosed with atrial fibrillation or atrial flutter.
• Electrocardiograms (ECG) were used to correlate cardiac electrical activity with echocardiographic findings.
• Phonocardiograms were utilized in conjunction with echocardiography to detect subtle atrial sounds.

Main Results:

• Atrial flutter demonstrated consistent, regular undulatory waves on the posterior left atrial wall and interventricular septum, synchronized with ECG flutter waves.
• The mitral valve showed slight reopening with each flutter wave after diastolic closure.
• Coarse atrial fibrillation resulted in undulatory, low-frequency mitral valve leaflet motion during diastole.
• Fine atrial fibrillation did not produce significant or constant undulations of the left atrial wall or interventricular septum.

Conclusions:

• Echocardiography can reveal characteristic dynamic changes in the left atrium and mitral valve during atrial flutter.
• Echocardiographic patterns differ between atrial flutter, coarse atrial fibrillation, and fine atrial fibrillation.
• Echocardiographic evaluation may aid in the diagnosis of atrial flutter, particularly in ambiguous electrocardiographic cases.