Ventricular reverse remodeling early after mitral valve repair for severe chronic mitral regurgitation with atrial fibrillation.
OBJECTIVE
Chronic mitral regurgitation (MR) results in volume overload followed by left ventricular (LV) and left atrial remodeling. The aim of this study was to investigate the relation of clinical, echocardiographic findings and N-terminal B-type natriuretic peptide (NT-proBNP) to LV reverse remodeling (LVRR) early after valve repair for severe chronic MR concomitant with modified maze procedure for atrial fibrillation (AF).


METHODS
We retrospectively evaluated 60 patients who were surgically treated for severe chronic MR and AF. Plasma NT-proBNP and echocardiographic measurements were performed before surgery, before discharge and 12 months after surgery. Echocardiogram was additionally performed at 6 months. LVRR was assessed by looking at regression of LV mass index (LVMI) using echocardiography.


RESULTS
Fifty-two patients (87%) were classified in the LVRR group, defined as having a postoperative reduction in LVMI. The remaining patients were classified in the non-LVRR group. The non-LVRR group was older (p = 0.004), had a significantly higher ratio of patients with hypertension (p = 0.022), higher NT-proBNP levels (p = 0.007) and lower ejection fraction (p = 0.034) compared to the LVRR group. In multivariate analysis, age (odds ratio 0.874, p = 0.013) and NT-proBNP levels (odds ratio 0.185, p = 0.040) were independent predictors of LVRR.


CONCLUSIONS
Preoperative lower NT-proBNP levels and younger age may predict LVRR early after surgical correction of chronic MR with AF.
Song
Bong Gun
BG
Division of Cardiology, Cardiac and Vascular Center, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
On
Young Keun
YK
Jeon
Eun-Seok
ES
Park
Ji Han
JH
Choi
Jin-Oh
JO
Lee
Sang-Chol
SC
Park
Seung Woo
SW
Kim
June Soo
JS
Park
Pyo Won
PW
D000367:Age Factors; D000368:Aged; D001281:Atrial Fibrillation / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D017115:Catheter Ablation / Q000379:methods*; D002908:Chronic Disease; D015331:Cohort Studies; D015150:Echocardiography, Doppler / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D019918:Heart Valve Prosthesis Implantation / Q000379:methods*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008944:Mitral Valve Insufficiency / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D015999:Multivariate Analysis; D020097:Natriuretic Peptide, Brain / Q000097:blood*; D016017:Odds Ratio; D011237:Predictive Value of Tests; D011300:Preoperative Care / Q000379:methods; D012189:Retrospective Studies; D018570:Risk Assessment; D012720:Severity of Illness Index; D016019:Survival Analysis; D016896:Treatment Outcome; D020257:Ventricular Remodeling / Q000502:physiology*
D020097:Natriuretic Peptide, Brain