An Evaluation of Acute Phase Cardiac Wall Motion by means of Speckle Tracking Echocardiography among Right Ventricular Apical Pacing, Mid-Septal and Outflow Tract of Right Ventricular Pacing in an Individual Patient

作者：Hirayama Yasutaka^*; Hotta Daisuke; Saito Tatsuya; Masuda Kunihiko; Shiraga Kotaro; Tsukamoto Masaru; Yokoyama Hideo; Sato Nobuyuki; Kawamura Yuichiro; Hasebe Naoyuki; Kikuchi Kenjiro; Ohori Katsumi

来源：International Medical Journal, 2010, 17(1): 63-66.

• 2D speckle tracking method
• trans-thoracic echocardiography (TTE)
• right ventricular septal (RVS) pacing
• right ventricular outflow tract (RVOT) pacing
• right ventricular apical (RVA) pacing
• complete atrioventricular block (cAVB)
• bradyarrhythmias

Research has gradually made clear that right ventricular apex (RVA) pacing reduces heart function, thus right ventricular septum (RVS) pacing and right ventricular outflow tract (RVOT) pacing have gradually taken its place. While sporadic studies documenting the efficacy of the new methods have been reported, the optimal pacing site has yet to be clearly established. In the study described here, we performed intraoperative transthoracic echocardiography and compared changes in left ventricular wall motion for each of the pacing sites during permanent pacemaker implantation. We performed temporary RVA, RVS, and RVOT pacing in the same patient, performing transthoracic echocardiography after measuring QRS width, then quantifying wall motions by the 2D speckle tracking method. Of the three pacing sites, RVOT pacing exhibited the best characteristics with respect to synchrony.

• 出版日期2010-3