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  • Title: Endogenous digoxin-like factor in acute myocardial infarction.
    Author: Bagrov AY, Kuznetsova EA, Fedorova OV.
    Journal: J Intern Med; 1994 Jan; 235(1):63-7. PubMed ID: 8283162.
    Abstract:
    OBJECTIVES: The aim of the study was to test the hypotheses that the concentrations of endogenous digoxin-like factor (EDLF) are (i) increased in the initial period after acute myocardial infarction (AMI) and (ii) may contribute to the genesis of ventricular arrhythmias. DESIGN: Consecutive sample study. SETTING: An 800-bed city teaching hospital, primary hospitalized care centre. SUBJECTS: Fifty-four consecutive patients of both sexes with a first transmural AMI, 16 male patients with unstable angina pectoris and eight healthy subjects. INTERVENTIONS: None. MAIN OUTCOME MEASURES: Time-course of the changes of plasma concentrations of EDLF (DELFIA digoxin fluoroimmunoassay) in patients during days 1-14 after uncomplicated AMI and AMI complicated with ventricular fibrillation and congestive heart failure. RESULTS: Plasma concentrations of EDLF in patients on the 1st day after AMI were increased (1.25 +/- 0.26 ng ml-1 digoxin equivalents, P < 0.025) as compared with both healthy controls (0.34 +/- 0.06 ng ml-1) and patients with unstable angina pectoris (0.40 +/- 0.08 ng ml-1). On the 1st day after AMI the plasma levels of EDLF in seven patients with primary ventricular fibrillation were higher (2.54 +/- 0.67 ng ml-1, P < 0.05) than in 47 patients without ventricular fibrillation (1.05 +/- 0.27 ng ml-1). In 14 patients with AMI and congestive heart failure (class III, Killip), plasma concentrations of EDLF were significantly lower (0.32 +/- 0.09 ng ml-1, P < 0.01) than in 40 patients with AMI without congestive heart failure (1.51 +/- 0.32 ng ml-1). Starting from the 2nd day of AMI, plasma EDLF decreased to the level of the control values (0.35 +/- 0.04 ng ml-1) and did not change during a 2-week period of observation. CONCLUSIONS: The results show an increase of plasma EDLF during the 1st day after AMI, and that higher plasma EDLF may be associated with the development of ventricular arrhythmias.
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