PREDICTOR FOR REDUCED FLOW VELOCITY OF LEFT ATRIAL APPENDAGE DURING SINUS RHYTHM IN PATIENTS WITH ATRIAL FIBRILLATION

2019 ◽  
Vol 73 (9) ◽  
pp. 1524
Author(s):  
Eiji Fukuhara ◽  
Takanao Mine ◽  
Hideyuki Kishima ◽  
Kenki Ashida ◽  
Masaharu Ishihara
Keyword(s):  
Atrial Fibrillation ◽  
Sinus Rhythm ◽  
Flow Velocity ◽  
Left Atrial ◽  
Left Atrial Appendage ◽  
Atrial Appendage ◽  
Reduced Flow

P5654Brain natriuretic peptide and left atrial volume predict the reduced flow velocity of left atrial appendage during sinus rhythm in patients with atrial fibrillation

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
E Fukuhara ◽  
T Mine ◽  
H Kishima ◽  
K Ashida ◽  
M Ishihara
Keyword(s):  
Atrial Fibrillation ◽  
Sinus Rhythm ◽  
Flow Velocity ◽  
Natriuretic Peptide ◽  
Left Atrial ◽  
Left Atrial Appendage ◽  
Atrial Appendage ◽  
Volume Index ◽  
Left Ventricular Ejection ◽  
Reduced Flow

Abstract Background It remains controversial whether or not to discontinue anticoagulation therapy after catheter ablation (CA) for atrial fibrillation (AF). The reduced flow velocity of the left atrial appendage (FV-LAA) during AF causes left atrial appendage thrombus and increases the risk of stroke. However, some AF patients show reduced FV-LAA even during sinus rhythm (SR). Methods 398 patients who showed SR during transesophageal echocardiography (TEE) before CA for AF were studied (259 males, 68±10 years, 77 with non-paroxysmal AF). Clinical factors, transthoracic echocardiography and blood samples were obtained before TEE. Reduced FV-LAA was defined as <35 cm/sec of FV-LAA. Results Reduced FV-LAA was observed 70/398 patients (18%). Reduced FV-LAA was significantly associated with elevated brain natriuretic peptide (BNP) (p<0.0001), increased LA volume index (p<0.0001), reduced left ventricular ejection fraction (p=0.0017), high prevalence of non-paroxysmal AF (p=0.0048), prior history of heart failure (p=0.0172), and no administration of angiotensin converting enzyme inhibitor/angiotensin II receptor blocker (ACEI/ARB) (p=0.0403), while CHADS2 factors were not significantly associated. On multivariate analysis, LA volume index (p<0.0001, OR 1.049 for each 1 increase in LA volume index, 95% CI 1.025–1.073) and no administration of ACEI/ARB (p=0.0015, OR 0.339 for administration, 95% CI 0.173–0.662) and BNP (p=0.0048, OR 1.035 for each 10 pg/ml increase in BNP, 95% CI 1.011–1.061) and were associated with reduced FV-LAA. Rate of reduced flow velocity Conclusion The elevated BNP level and large LA volume index predict reduced FV-LAA during SR. AF patients with increased BNP and larger LA volume index might require long-term anticoagulation taking after CA procedure.

P3731The improvement in left atrial strain among patients undergoing percutaneous left atrial appendage closure

2019 ◽  
Vol 40 (Supplement_1) ◽  
Author(s):  
S Ijuin ◽  
A Hamadanchi ◽  
F Haertel ◽  
L Baez ◽  
C Schulze ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Sinus Rhythm ◽  
Transesophageal Echocardiography ◽  
Left Atrial ◽  
Left Atrial Appendage ◽  
Lateral Wall ◽  
Bleeding Risk ◽  
Atrial Appendage ◽  
Left Atrial Appendage Closure ◽  
Left Atrial Strain

Abstract Background Percutaneous left atrial appendage closure (LAAC) is being established as an alternative option for atrial fibrillation (AF) patients with high bleeding risk. Few studies reported the influence of percutaneous LAAC on left atrial (LA) performance, but most of the studies demonstrated no remarkable changes in their parameters after the procedure. Method The study included 95 patients (age: 75±6.7 years, 67% male) whom underwent percutaneous LAAC in a single center between September 2012 and November 2018. LA strain was evaluated at three different time intervals by transesophageal echocardiography (baseline, 45 days and 180 days after procedure). All data were analyzed using a dedicated. 70 patients had atrial fibrillation whereas 25 were in sinus rhythm. Analysis was performed for peak atrial longitudinal strain (PALS) and peak atrial contraction strain (PACS) from segment of lateral wall in mid-esophageal 4 chamber view. The validity of lateral wall left atrial analysis was recently shown by our group. PACS was obtained in patients with sinus rhythm during exams. Results Compared to baseline, PALS was significantly increased after 45 days (12.4±8.4% vs 16.0±10.7%, p=0.001) and remained stable after 180 days (13.8±9.0% vs 17.0±12.4%, p=0.098). Even in only patients with atrial fibrillation during exams, it was increased (10.8±7.7% vs 13.4±7.1%, p=0.012 and 8.5±5.1% vs 13.9±8.1%, p=0.014). Similarly, compared with the baseline, PACS was significantly increased after 45 days and 180 days (5.8±3.9% vs 10.6±7.6%, p=0.001 and 4.5±2.6% vs 7.9±3.1%, p=0.036). The Changes in PALS and PACS Conclusion Our study has demonstrated for the first time the improvement in LA strain following LAAC within 45 days of implantation by transesophageal echocardiography and these values were maintained at least for 6 months. Further appraisal is warranted for confirmation of these preliminary findings.

scholarly journals Left atrial appendage orifice area and morphology is closely associated with flow velocity in patients with nonvalvular atrial fibrillation

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Lei Chen ◽  
Changjiang Xu ◽  
Wensu Chen ◽  
Chaoqun Zhang
Keyword(s):  
Atrial Fibrillation ◽  
Flow Velocity ◽  
Left Atrial ◽  
Left Atrial Appendage ◽  
Linear Regression Analysis ◽  
Left Ventricular ◽  
Atrial Appendage ◽  
Mechanical Function ◽  
Orifice Area ◽  
The Relationship

Abstract Background Thromboembolic events are the most serious complication of atrial fibrillation (AF), and the left atrial appendage (LAA) is the most important site of thrombosis in patients with AF. During the period of COVID-19, a non-invasive left atrial appendage detection method is particularly important in order to reduce the exposure of the virus. This study used CT three-dimensional reconstruction methods to explore the relationship between LAA morphology, LAA orifice area and its mechanical function in patients with non-valvular atrial fibrillation (NVAF). Methods A total of 81 consecutive patients with NVAF (36 cases of paroxysmal atrial fibrillation and 45 cases of persistent atrial fibrillation) who were planned to undergo catheter radiofrequency ablation were enrolled. All patients were examined by transthoracic echocardiography (TTE), TEE, and computed tomography angiography (CTA) before surgery. The LAA orifice area was obtained according to the images of CTA. According to the left atrial appendage morphology, it was divided into chicken wing type and non-chicken wing type. At the same time, TEE was performed to determine left atrial appendage flow velocity (LAAFV), and the relationship between the left atrial appendage orifice area and LAAFV was analyzed. Results The LAAFV in Non-chicken wing group was lower than that in Chicken wing group (36.2 ± 15.0 cm/s vs. 49.1 ± 22.0 cm/s, p-value < 0.05). In the subgroup analysis, the LAAFV in Non-chicken wing group was lower than that in Chicken wing group in the paroxysmal AF (44.0 ± 14.3 cm/s vs. 60.2 ± 22.8 cm/s, p-value < 0.05). In the persistent AF, similar results were observed (29.7 ± 12.4 cm/s vs. 40.8 ± 17.7 cm/s, p-value < 0.05). The LAAFV in persistent AF group was lower than that in paroxysmal AF group (34.6 ± 15.8 cm/s vs. 49.9 ± 20.0 cm/s, p-value < 0.001). The LAAFV was negatively correlated with left atrial dimension (R = − 0.451, p-value < 0.001), LAA orifice area (R= − 0.438, p-value < 0.001) and left ventricular mass index (LVMI) (R= − 0.624, p-value < 0.001), while it was positively correlated with LVEF (R = 0.271, p-value = 0.014). Multiple linear regression analysis showed that LAA morphology (β = − 0.335, p-value < 0.001), LAA orifice area (β = −  0.185, p-value = 0.033), AF type (β = − 0.167, p-value = 0.043) and LVMI (β = − 0.465, p-value < 0.001) were independent factors of LAAFV. Conclusions The LAA orifice area is closely related to the mechanical function of the LAA in patients with NVAF. The larger LAA orifice area and LVMI, Non-chicken wing LAA and persistent AF are independent predictors of decreased mechanical function of LAA, and these parameters might be helpful for better management of LA thrombosis.

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