„Application of intracardiac echocardiography in a patient with challenging heart anatomy and focal atrial tachycardia

A 62-year-old female with multiple sclerosis in remission was admitted for electrophysiological study due to persistent tachycardia episodes. Patient had been experiencing heart palpitations for 30 years, symptoms intensified post-respiratory infection in 2018, leading to daily arrhythmia by 2023. Holter monitoring revealed supraventricular tachycardia (115-120 bpm), with subsequent hospital telemetry confirming frequent arrhythmia. The diagnostic process, guided by intracardiac echocardiography, uncovered an aneurysmal interatrial septum. Ablation procedures targeting an aneurysmal interatrial septum successfully terminated arrhythmia, confirmed by follow-up over six months. The case underscores the importance of intracardiac echocardiography in navigating challenging cardiac anatomy during electrophysiological interventions.