Is left ventricular diastolic function an independent marker of prognosis after acute myocardial infarction?
BACKGROUND
In addition to clinical risk markers, indices of left ventricular (LV) systolic function are valuable prognostic markers after acute myocardial infarction (MI). Previous studies have also suggested that LV diastolic function may contribute with prognostic information. The present study assessed whether this assumption applies to a large population of patients with acute MI who underwent thrombolytic therapy.


RESULTS
520 out of 608 patients participating in the ATTenuation by Adenosine of Cardiac Complications (ATTACC) study, with an ST-elevation acute MI underwent two-dimensional and Doppler echocardiographic examination at 4 (range 2-10) days after admission. During the follow-up period of 31 (S.D. +/- 11) months, cardiovascular death occurred in 57 (11%) patients, nonfatal acute MI occurred in 77 (15%), and 124 (24%) patients suffered a combined cardiovascular end-point (either nonfatal acute MI or cardiovascular death). Univariate regression analysis showed that all indices of LV systolic function predicted cardiovascular death and combined cardiovascular end-points. Regarding LV diastolic function only a restrictive filling pattern predicted cardiovascular death. In a multistep multivariate regression analysis in which the variables were introduced in a hierarchic order age, history of systemic hypertension, wall motion score index (WMSi), and history of previous MI and diabetes mellitus were independent predictors of cardiovascular death. A history of systemic hypertension or congestive heart failure were independent predictors of nonfatal acute MI, while a history of systemic hypertension, wall motion score index and diabetes mellitus independently predicted combined cardiovascular end-points.


CONCLUSIONS
The results of this study confirmed that clinical risk indicators and LV systolic function were the most important independent predictors of cardiovascular death and combined cardiovascular end-points. LV diastolic function assessed by Doppler-echocardiography did not provide additional prognostic information.
Quintana
Miguel
M
Department of Cardiology, Huddinge University Hospital, Karolinska Institute, Stockholm, Sweden. miguel.quintana@labmed.ki.se
Edner
Magnus
M
Kahan
Thomas
T
Hjemdahl
Paul
P
Sollevi
Alf
A
Rehnqvist
Nina
N
D000241:Adenosine / Q000627:therapeutic use*; D000368:Aged; D015415:Biomarkers; D003971:Diastole / Q000502:physiology*; D004311:Double-Blind Method; D015150:Echocardiography, Doppler; D004562:Electrocardiography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009203:Myocardial Infarction / Q000175:diagnosis* / Q000188:drug therapy / Q000401:mortality*; D011237:Predictive Value of Tests; D011336:Probability; D011379:Prognosis; D011446:Prospective Studies; D012044:Regression Analysis; D012680:Sensitivity and Specificity; D012720:Severity of Illness Index; D016019:Survival Analysis; D016896:Treatment Outcome; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging / Q000503:physiopathology*; D016277:Ventricular Function, Left / Q000502:physiology
D015415:Biomarkers; D000241:Adenosine