Background- Diurnal variation in the onset of acute myocardial infarction has been demonstrated with a peak in the morning. Few data are available about the occurrence of left ventricular systolic dysfunction according to the time of infarct Methods and Results- We performed a prospective cohort study that included 100 patients with acute myocardial infarction (AMI). Left ventricular systolic dysfunction (LVSD) was defined by echocardiography when ejection fraction (EF) was less than 55%. Of these patients, 72 (72%) had EF < 55%, and 37 of them experienced myocardial infarction between 6 AM and 5:59 PM (group 1) and 63 (63%) experienced their AMI between 6PM and 5:59 AM (Group 2). Left ventricular EF less than 55% occurred in 22 (30.6%) patients of group 1 compared with 50 (69.4%) patients in group 2 (p=0.04). Mild, moderate and severe LVSD were also more frequent in group 2 patients (P=0.01). Conclusions- The risk of mild, moderate and severe left ventricular systolic dysfunction after AMI is higher among infarctions that occur at night (Iranian Heart Journal 2003; 4 (2, 3): 29 -33).
ZAND PARSA AMIR, F., NADERI, N., & GHAEMIAN, A. (2003). NIGHT-TIME INFARCTION INCREASES THE RISK OF LEFT VENTRICULAR SYSTOLIC DYSFUNCTION. Iranian Heart Journal, 4(1.2), 29-33.
MLA
FARHANG ZAND PARSA AMIR; NAZILA NADERI; A GHAEMIAN. "NIGHT-TIME INFARCTION INCREASES THE RISK OF LEFT VENTRICULAR SYSTOLIC DYSFUNCTION". Iranian Heart Journal, 4, 1.2, 2003, 29-33.
HARVARD
ZAND PARSA AMIR, F., NADERI, N., GHAEMIAN, A. (2003). 'NIGHT-TIME INFARCTION INCREASES THE RISK OF LEFT VENTRICULAR SYSTOLIC DYSFUNCTION', Iranian Heart Journal, 4(1.2), pp. 29-33.
VANCOUVER
ZAND PARSA AMIR, F., NADERI, N., GHAEMIAN, A. NIGHT-TIME INFARCTION INCREASES THE RISK OF LEFT VENTRICULAR SYSTOLIC DYSFUNCTION. Iranian Heart Journal, 2003; 4(1.2): 29-33.