Left atrial appendage contributes to left atrial booster function after the maze procedure: quantitative assessment with multidetector computed tomography☆

Abstract

LAA largely contributes to LA booster function, particularly in the maze group, because LA booster function is deteriorated in this group of patients.

Assessment of the structural remodeling of the left atrium by 64-multislice cardiac CT: Comparative studies in controls and patients with atrial fibrillation

“…In the present study, the LAA demonstrated the highest contractility among the three anatomic compartments. A previous report has stated that LAA preservation contributes to an improved contractile function of the LAA after MAZE procedure [5]. In the present study, the LAA parameters displayed a relatively poor relationship with those of the left atrial proper, which is consistent with a previous report stating that the LAA has a distinct pattern of contraction and a greater dependence on LV function than on LA function [11].…”

“…Because the structure of the LA differs according to each compartment, it is necessary to understand the physiological changes that can occur in each LA compartment. The LAA is known to be important to preserve a contractile function and to serve as a main source of thrombus formation in AF patients [5]. However, functional assessments of the ALA and VLA have not been reported yet.…”

“…In patients with atrial fibrillation (AF), mechanical remodeling of the LA manifests as decreased atrial contractility and increased atrial compliance, which leads to LA enlargement [2]. Radiofrequency ablation (RFA) has emerged as an important interventional procedure for the restoration of normal sinus rhythms in AF patients [3][4][5]. Cardiac multidetector computed tomography (MDCT) is commonly used prior to RFA to achieve a precise three-dimensional anatomic delineation of the pulmonary vein and adjacent vessel [6][7][8].…”

Rules and Principles of Patient Selection for Surgical Treatment of Acquired Heart Diseases Complicated by Atrial Fibrillation

“…Между тем максимальный объем ушка левого предсердия в первой группе был значительно больше (16,9±7,3 мл против 8,4±4,7 мл), но фракция вы-броса ушка (34,1±12,8% против 36,1±7,4%) была сопоста-вима в обеих группах, таким образом, вклад ушка левого предсердия является значимым, особенно у пациентов, перенесших РЧ-процедуру «Лабиринт», т.к. показатели сократимости левого предсердия в целом у них хуже [34].…”

Minimally Invasive Surgical Therapies for Atrial Fibrillation

“…Kamohara and coworkers described that LAA exclusion may affect left atrial reservoir function in short- and mid-term periods in animal models [72]. Yamanaka and coworkers reported the influence of LAA exclusion on left atrial function by computed tomography [73]. In their study, LAA preservation contributed to improved transport function, and none of their patients in sinus rhythm after the maze procedure experienced a thromboembolic event.…”