Author + information
- Ahmet Çağrı Aykan1,
- Mustafa Yıldız2,
- Can Yücel Karabay2,
- Beytullah Çakal2,
- Sinem Çakal2,
- Alparslan Şahin3 and
- Mehmet Özkan2
Typical atrioventricular nodal re-entrant tachycardia (AVNRT) can be cured with the slow pathway ablation. This study was designed to assess the alterations of atrial and ventricular function by using speckle tracking echocardiography in consecutive patients with typical AVNRT who underwent slow-pathway radiofrequency (RF) ablation.
Twenty-three consecutive patients with symptomatic drug-resistant typical (slow-fast) AVNRT underwent an invasive electrophysiology study and RF ablation. Patients underwent transthoracic echocardiographic evaluation 24 hours before and 24 hours after the ablation procedure.
AVNRT was induced during electrophysiological study. RF ablation successfully eliminated tachyarrhythmia in 23 (100%) patients. The AH interval was decreased in the post-ablation period as compared with pre-ablation period and no immediate conduction disturbances. Peak left atrial longitudinal strain during reservoir phase was increased in the post-ablation period as compared with pre-ablation period (48.24±16.45 vs. 38.07±15.72, p<0.001). The left atrial septal electromechanical coupling time was significantly decreased after the procedure (48.90±12.26 vs. 38.92±7.14 ms, p=0.036). The left ventricular torsion (15.21±2.81 vs. 21.17±6.95, p=0.001) and left ventricular apical rotation (9.70±4.10 vs. 12.63± 5.93, p=0.045) were significantly increased after the procedure (Table-1).
Besides treatment of arrhythmia radiofrequency catheter ablation of AVNRT may also restore left atrial functions as early as 24 hours after the procedure.
|AH interval, ms||66.96 ± 8.20||59.52 ± 7.92||<0.001|
Abbreviations: A4C-S, LV Apical four chamber peak systolic strain; A2C-S, LV Apical two chamber peak systolic strain; LAX-S, apical long axis peak systolic strain; LV-G-S, Left ventricle global peak systolic strain; RV-G-S, Right ventricle global peak systolic strain; LA-S-r, Peak left atrial longitudinal strain during reservoir phase; TPA, Tricuspid atrial electromechanical coupling time; SPA, Septal atrial electromechanical coupling time, LPA, Lateral atrial electromechanical coupling time