Effect of â-blockers on the risk of atrial fibrillation in patients with acute myocardial infarction
Clinics
; Clinics;65(3): 265-270, 2010. tab, ilus
Article
in En
| LILACS
| ID: lil-544018
Responsible library:
BR1.1
ABSTRACT
INTRODUCTION:
Oral â-blockers improve the prognosis of patients with acute myocardial infarction, while atrial fibrillation worsens the prognosis of this population. The reduction of atrial fibrillation incidence in patients treated with â-blockers could at least in part explain the benefits of this drug.OBJECTIVE:
To investigate the effect of â-blockers on the incidence of atrial fibrillation in patients with acute myocardial infarction.METHODS:
We analyzed 1401 patients with acute myocardial infarction and evaluated the occurrence or absence of atrial fibrillation, the use of oral â-blockers and mortality during the first 24 hours.RESULTS:
a) The use of â-blockers was inversely correlated with the presence of atrial fibrillation (ñ = 0.004; OR = 0.54). b) Correlations with mortality were as follows 31.5 percent in patients with atrial fibrillation, 9.2 percent in those without atrial fibrillation (ñ < 0.001; Odds Ratio = 4.52), and 17.5 percent in patients not treated with â-blockers and 6.7 percent in those who received the drug (ñ < 0.001; OR = 0.34). c) Adjusted Models The presence of atrial fibrillation was independently correlated with mortality (OR = 2.48, ñ = 0.002). The use of â-blockers was inversely and independently correlated with mortality (OR = 0.53; ñ = 0.002). The patients who used â-blockers showed a lower risk of atrial fibrillation (OR = 0.59; ñ = 0.029) in the adjusted model.CONCLUSION:
The presence of atrial fibrillation and the absence of oral â-blockers increased in-hospital mortality in patients with acute myocardial infarction. Oral â-blockers reduced the incidence of atrial fibrillation, which might be at least partially responsible for the drug's benefit.Key words
Full text:
1
Index:
LILACS
Main subject:
Atrial Fibrillation
/
Adrenergic beta-Antagonists
/
Myocardial Infarction
Type of study:
Etiology_studies
/
Risk_factors_studies
Limits:
Aged
/
Female
/
Humans
/
Male
Language:
En
Journal:
Clinics
Journal subject:
MEDICINA
Year:
2010
Type:
Article