Right ventricular dysfunction and risk of heart failure and mortality after myocardial infarction.
OBJECTIVE
The aim of this study was to determine the prognostic value of right ventricular (RV) function in patients after a myocardial infarction (MI).


BACKGROUND
Right ventricular function has been shown to predict exercise capacity, autonomic imbalance and survival in patients with advanced heart failure (HF).


METHODS
Two-dimensional echocardiograms were obtained in 416 patients with left ventricular (LV) dysfunction (ejection fraction [LVEF] < or = 40%) from the Survival And Ventricular Enlargement (SAVE) echocardiographic substudy (mean 11.1 +/- 3.2 days post infarction). Right ventricular function from the apical four-chamber view, assessed as the percent change in the cavity area from end diastole to end systole (fractional area change [FAC]), was related to clinical outcome.


RESULTS
Right ventricular function correlated only weakly with the LVEF (r = 0.12, p = 0.013). On univariate analyses, the RV FAC was a predictor of mortality, cardiovascular mortality and HF (p < 0.0001 for all) but not recurrent MI. After adjusting for age, gender, diabetes mellitus, hypertension, previous MI, LVEF, infarct size, cigarette smoking and treatment assignment, RV function remained an independent predictor of total mortality, cardiovascular mortality and HF. Each 5% decrease in the RV FAC was associated with a 16% increased odds of cardiovascular mortality (95% confidence interval 4.3% to 29.2%; p = 0.006).


CONCLUSIONS
Right ventricular function is an independent predictor of death and the development of HF in patients with LV dysfunction after MI.
Zornoff
Leonardo A M
LA
Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.
Skali
Hicham
H
Pfeffer
Marc A
MA
St John Sutton
Martin
M
Rouleau
Jean L
JL
Lamas
Gervasio A
GA
Plappert
Ted
T
Rouleau
Jacques R
JR
Moyé
Lemuel A
LA
Lewis
Sandra J
SJ
Braunwald
Eugene
E
Solomon
Scott D
SD
D000368:Aged; D005260:Female; D006333:Heart Failure / Q000209:etiology* / Q000503:physiopathology; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000150:complications* / Q000000981:diagnostic imaging / Q000401:mortality / Q000503:physiopathology; D011379:Prognosis; D016016:Proportional Hazards Models; D011446:Prospective Studies; D012307:Risk Factors; D016019:Survival Analysis; D014463:Ultrasonography; D018487:Ventricular Dysfunction, Left / Q000150:complications; D018497:Ventricular Dysfunction, Right / Q000150:complications*; D016278:Ventricular Function, Right