Mitral valve procedure in dilated cardiomyopathy: repair or replacement?
BACKGROUND
Mitral valve (MV) procedure for dilated cardiomyopathy is becoming popular. We analyzed the indications to MV repair or replacement according to our 10-year experience.


METHODS
From January 1990 to May 2000, 49 patients with dilated cardiomyopathy (12 idiopathic and 37 ischemic) underwent MV operation, 29 repair and 20 replacement. Preoperative evaluation included measurement of MV coaptation depth (CD) as a mirror of the abnormalities of MV apparatus leading to functional mitral regurgitation.


RESULTS
Thirty-day mortality was 4.2% (2 patients). One-, 3-, 5-, and 10-year actuarial survival was, respectively, 90%, 87%, 78%, and 73%. The possibility of survival with at least one New York Heart Association functional class improvement was 88%, 76%, 71%, and 65%. Return of functional mitral regurgitation after MV repair was nearly inevitable; however, using a scale from 0 to 4, mean postoperative functional mitral regurgitation was 1.2+/-0.8 when preoperative MVCD was 10 mm or less and 2.5+/-0.7 when preoperative MVCD was 11 mm or higher (p < 0.05). Globally, functional results were not influenced by the strategy of treatment (MV repair or replacement).


CONCLUSIONS
Mitral valve operation can give satisfying survival and good palliation of dilated cardiomyopathy. The MVCD can be helpful in the choice of the surgical strategy on the MV.
Calafiore
A M
AM
Department of Cardiology and Cardiac Surgery, University G. D'Annunzio of Chieti, Italy. calafiore@unich.it
Gallina
S
S
Di Mauro
M
M
Gaeta
F
F
Iacò
A L
AL
D'Alessandro
S
S
Mazzei
V
V
Di Giammarco
G
G
D000328:Adult; D000368:Aged; D006348:Cardiac Surgical Procedures / Q000379:methods / Q000401:mortality*; D002311:Cardiomyopathy, Dilated / Q000150:complications / Q000175:diagnosis / Q000601:surgery*; D001026:Coronary Artery Bypass / Q000401:mortality; D004452:Echocardiography; D005260:Female; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis / Q000009:adverse effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000601:surgery*; D008944:Mitral Valve Insufficiency / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D011336:Probability; D012189:Retrospective Studies; D018570:Risk Assessment; D012680:Sensitivity and Specificity; D015996:Survival Rate; D016896:Treatment Outcome