[Electrophysiologic study and endocardial ECG mapping in the detection of causes of heart rhythm disorders]

Area of Science:

• Cardiology
• Electrophysiology
• Medical Devices

Context:

• Tachycardias, particularly those involving accessory pathways and ectopic foci, present significant diagnostic and therapeutic challenges.
• Electrophysiological investigation (EPI) and ECG mapping are crucial for identifying abnormal cardiac pathways and ectopic sources.
• Catheter-based ablation techniques are standard for treating tachyarrhythmias.

Purpose:

• To evaluate the diagnostic yield of electrophysiological investigation in identifying accessory pathways and ectopic foci.
• To assess the efficacy and success rates of radiofrequency (RF) catheter ablation for these arrhythmias.
• To explore the management of ectopic foci in specific conditions like left ventricle aneurysm.

Summary:

• Electrophysiological investigation was performed on 45 patients, identifying accessory pathways in 37 (82.22%).
• Successful radiofrequency catheter ablation was achieved in 34 (91.89%) of patients with accessory pathways.
• Ectopic foci were identified in patients with left ventricle aneurysm, leading to interventions like aneurysmectomy or pacemaker implantation.

Impact:

• This study highlights the diagnostic accuracy of EPI in localizing arrhythmogenic substrates.
• It demonstrates the high success rate of RF catheter ablation for accessory pathway-mediated tachycardias.
• The findings support tailored therapeutic strategies for complex tachyarrhythmias and associated cardiac conditions.