scholarly journals Left atrial size and contractile function in healthy dogs and dogs with chronic mitral valve disease

2018 ◽  
Vol 38 (8) ◽  
pp. 1622-1630
Author(s):  
Lilian C. Petrus ◽  
Jacqueline R. Castro ◽  
Matheus M. Mantovani ◽  
André M. Gimenes ◽  
Caio N. Duarte ◽  
...  
Keyword(s):  
Mitral Valve ◽  
Left Atrium ◽  
Mitral Valve Disease ◽  
Left Atrial ◽  
Contractile Function ◽  
Peak Velocity ◽  
Valve Disease ◽  
Transmitral Flow ◽  
Left Atrial Diameter ◽  
Atrial Enlargement

ABSTRACT: In humans, left atrial enlargement and reduced contractile functions are associated with adverse cardiovascular events and a poor prognosis in many dilatation of the left atrium occurs with the gradual evolution of chronic mitral valve disease and is well diseases. The left atrium is the most compromised cardiac chamber in dogs with chronic mitral valve disease (CMVD). Therefore, this study aimed to compare the main parameters of left atrial enlargement (left atrium/aorta ratio, left atrial diameter and volume indices) and contractile function (transmitral flow peak velocity A wave and time velocity integral, atrial fraction, and atrial ejection force) at different stages of valve disease, and correlate the left atrial diameter, volume, and contractile function indices with echocardiographic variables predictive of heart failure in dogs (transmitral flow peak velocity E wave, E wave/IVRT ratio, E wave/E´wave ratio, and E wave/A wave ratio). The results showed that progressive characterized by the left atrium/aorta ratio and left atrium volume index. The left atrial diameter and volume indices and left atrium/aorta ratio correlated positively with the transmitral flow peak velocity E wave and E wave/IVRT ratio, which are important indices of diastolic function. The left atrial contractile function indices increased as CMVD evolved. Except for the atrial fraction, the left atrial contractile function indices correlated with the left ventricular filling pressure indices.

scholarly journals Striking left atrial enlargement as a consequence of mitral valve disease

2005 ◽  
Vol 27 (2) ◽  
pp. 200-200 ◽  
Author(s):  
R. Nijveldt ◽  
P.A. Dijkmans ◽  
G.Tj. Sieswerda ◽  
O. Kamp ◽  
A.C. van Rossum
Keyword(s):  
Mitral Valve ◽  
Mitral Valve Disease ◽  
Left Atrial ◽  
Valve Disease ◽  
Left Atrial Enlargement ◽  
Atrial Enlargement

scholarly journals CONCOMITANT PROCEDURE OF ATRIAL FIBRILLATION ABLATION WITH AND WITHOUT LEFT ATRIOPLASTY DURING SURGICAL CORRECTION OF THE MITRAL VALVE DISEASE: PROSPECTIVE, RANDOMIZED TRIAL

2018 ◽  
Vol 33 (3) ◽  
pp. 63-70
Author(s):  
A. V. Bogachev-Prokophiev ◽  
S. I. Zheleznev ◽  
M. A. Ovcharov ◽  
A. V. Afanasyev ◽  
R. M. Sharifulin ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Mitral Valve ◽  
Left Atrium ◽  
Mitral Valve Disease ◽  
Left Atrial ◽  
Valve Disease ◽  
Atrial Ablation ◽  
Group I ◽  
Group Ii

Objective. Main objective of this prospective randomized study was to assess safety and efficiency of the combined approach for the left atrial ablation in combination with and without reduction left atrioplasty in patients with mitral valve disease.Material and Methods. The study was performed from September, 2014 to February, 2017. A total of 120 patients with mitral valve disease, permanent atrial fibrillation (AF), and left atriomegaly were enrolled in the study. Patients were randomized to two groups: group I comprised patients who received correction of mitral valve disease in combination with AF ablation and without reduction atrioplasty of the left atrium (MV+MAZE); group II (n=60) comprised patients with correction of mitral valve disease in combination with AF ablation and with reduction atrioplasty of the left atrium (MV+MAZE+AP). Patient characteristics did not differ between groups.Results. There were no significant differences between groups in the early mortality rates (2 patients in group I versus 5 patients in group II, p=0.64); bleeding rates (total 5 cases including 2 patients in group I and 3 patients in group II, p=0.34), and the rates of AF recurrence in the early postoperative period. Permanent pacemakers were implanted in 8 patients (13.3%) of group I and in 4 patients (6.7%) of group II. Total long-term mortality was 4 patients including 1 and 3 patients in group I and II, respectively, which did not significantly differed. The rates of one-year freedom from AF were 84.8 and 86.2% in group I and II, respectively. No new onsets of atrial fibrillation were observed for 36 months in both groups. The rates of freedom from thromboembolic events during the time of observation were 88.6% in group I and 96.5% in group II. Conclusion. The left atrial reduction concomitant with the left atrial ablation and correction of mitral valve disease is safe and effective procedure. However, this procedure did not impact the rates of long-term freedom from AF.

scholarly journals Cardiomyocyte marker expression in dogs with left atrial enlargement due to dilated cardiomyopathy or myxomatous mitral valve disease

2017 ◽  
Vol 55 (2) ◽  
pp. 52-61 ◽  
Author(s):  
Izabela Janus ◽  
Malgorzata Kandefer-Gola ◽  
Rafal Ciaputa ◽  
Agnieszka Noszczyk-Nowak ◽  
Urszula Paslawska ◽  
...  
Keyword(s):  
Mitral Valve ◽  
Dilated Cardiomyopathy ◽  
Mitral Valve Disease ◽  
Left Atrial ◽  
Valve Disease ◽  
Left Atrial Enlargement ◽  
Atrial Enlargement ◽  
Marker Expression

scholarly journals Left Atrial Mural Thrombosis and Hemopericardium in a Dog with Myxomatous Mitral Valve Disease

2021 ◽  
Vol 8 (6) ◽  
pp. 112
Author(s):  
Domenico Caivano ◽  
Maria Chiara Marchesi ◽  
Francesco Birettoni ◽  
Elvio Lepri ◽  
Francesco Porciello
Keyword(s):  
Mitral Valve ◽  
Pericardial Effusion ◽  
Mitral Valve Disease ◽  
Left Atrial ◽  
Valve Disease ◽  
Atrial Wall ◽  
Left Atrial Wall ◽  
Echocardiographic Examination ◽  
Atrial Enlargement ◽  
The Right

A 14-year-old mixed-breed dog with a 2-year history of myxomatous mitral valve disease was examined for collapse and lethargy. At the presentation, pale oral mucous membranes, rapid and weak femoral pulses, and muffled heart sounds with a moderate left apical systolic murmur were revealed. Echocardiographic examination showed pericardial effusion with organized echogenic material originating from the left atrial wall. Tamponade of the right atrium and severe left atrial enlargement were also observed. Multiple views of the left atrium and left auricle allowed to visualize a hyperechoic mass adherent to the endocardium of the left atrial wall. Contrast-enhanced ultrasonography study allowed to rule out active intrapericardial hemorrhages, and echo-guided pericardiocentesis was performed. No recurrence of pericardial effusion was observed, but the dog suddenly died after 10 days. The postmortem examination confirmed multifocal left atrial thrombosis attached to the endomyocardial tears.

A modified maze procedure performed only on the left atrium for chronic atrial fibrillation associated with mitral valve disease: Report of a case

Surgery Today ◽  
1996 ◽  
Vol 26 (2) ◽  
pp. 135-137 ◽  
Author(s):  
Taijiro Sueda ◽  
Hiroo Shikata ◽  
Kazumasa Orihashi ◽  
Norimasa Mitsui ◽  
Hideyuki Nagata ◽  
...  
Keyword(s):  
Atrial Fibrillation ◽  
Mitral Valve ◽  
Left Atrium ◽  
Mitral Valve Disease ◽  
Chronic Atrial Fibrillation ◽  
Valve Disease ◽  
Maze Procedure
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