Atrial septal pacing to synchronize atrial depolarization in patients with delayed interatrial conduction
| Autor: | Eustathios Lazaris, Nikolaos Louvros, Athanasios G. Manolis, Charis Vassilopoulos, Apostolos G. Katsivas |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
Male
medicine.medical_specialty Pacemaker Artificial Time Factors Electrocardiography Heart Conduction System Internal medicine Atrial Fibrillation medicine Heart Septum Humans Sinus rhythm Fossa ovalis cardiovascular diseases Heart Atria Coronary sinus medicine.diagnostic_test business.industry P wave Cardiac Pacing Artificial General Medicine Middle Aged Heart septum Atrial Lead Electrodes Implanted medicine.anatomical_structure Ventricle Anesthesia cardiovascular system Cardiology Female Cardiology and Cardiovascular Medicine business |
| Zdroj: | Pacing and clinical electrophysiology : PACE. 21(11 Pt 2) |
| ISSN: | 0147-8389 |
| Popis: | The current method of pacing the right atrium from the appendage or free wall is often the source of delayed intraatrial conduction and discoordinate left and right atrial mechanical function. Simultaneous activation of both atria with pacing techniques involving multisite and multilead systems is associated with suppression of supraventricular tachyarrhythmias and improved hemodynamics. In the present study we tested the hypothesis that pacing from a single site of the atrial septum can synchronize atrial depolarization. Five males and two females (mean age 58 +/- 6 years) with drug refractory paroxysmal atrial fibrillation (AF) were studied who were candidates for AV junctional ablation. All patients had broad P waves (118 +/- 10 ms) on the surface ECG. Multipolar catheters were inserted and the electrograms from the high right atrium (HRA) and proximal, middle, and distal coronary sinus (CS) were recorded. The atrial septum was paced from multiple sites. The site of atrial septum where the timing between HRA and distal CS (d-CS) was < or = 10 ms was considered the most suitable for simultaneous atrial activation. An active fixation atrial lead was positioned at this site and a standard lead was placed in the ventricle. The interatrial conduction time during sinus rhythm and AAT pacing and the conduction time from the pacing site to the HRA and d-Cs during septal pacing were measured. Atrial septal pacing was successful in all patients at sites superior to the CS o.s. near the fossa ovalis. During septal pacing the P waves were inverted in the inferior leads with shortened duration from 118 +/- 10 ms to 93 +/- 7 ms (P < 0.001), and the conduction time from the pacing site to the HRA and d-CS was 54.3 +/- 6.8 ms and 52.8 +/- 2.5 ms, respectively. The interatrial conduction time during AAT pacing was shortened in comparison to sinus rhythm (115 +/- 18.9 ms vs 97.8 +/- 10.3 ms, P < 0.05). In conclusion, simultaneous activation of both atria in patients with prolonged interatrial conduction time can be accomplished by pacing a single site in the atrial septum using a standard active fixation lead placed under electrophysiological study guidance. Such a pacing system allows proper left AV timing and may prove efficacious in preventing various supraventricular tachyarrhythmias. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text