Related Experiment Videos
[Electrophysiologic study and endocardial ECG mapping in the detection of causes of heart rhythm disorders]
E Halilović1, T Meinertz, C Weiss
1Zavod za fiziologiju, Medicinski fakultet Tuzla.
Insights
Electrophysiological investigation effectively identifies accessory pathways and ectopic foci causing tachycardias. Radiofrequency catheter ablation offers a high success rate for treating these abnormal heart rhythms.
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.
Abstract:
Accessory pathways and ectopic heart focuses tachycardias are often cause of tachycardias. AV reentry tachycardias are great diagnostic and therapeutic problems. Using the electrophysiological investigation and ECG mapping, there is possibility to find out abnormal pathways and ectopic atrial and ventricular focuses. In electrophysiological investigations we can use bipolar, threepolar and multipolar electrodes and mapping electrodes, as well. The ablation catheter is introduced by transveins way in electrophysiological investigation of right atrium and ventricle, and via the femoral artery to the left atrium and ventricle. We investigated 45 patients, who are hospitalised at the Cardiology clinic Ependorf, of the University in Hamburg Accessory pathways were found out in 37 (82.22%) patients. Successful RF catheter ablation was done in 34 (91.89%) patients and unsuccessful in 3 (8.10%). Ectopic focuses were found out in patients with left ventricle aneurysm. It was indication for aneurysmectomia in two cases and for implantation of antitachycardia pacemaker in one case.