The objectives of this study are to describe mechanisms ofacute heart failure and to identify the predictors for all-cause mortality by patients admitted for hospitalization by emergency departments as well as to compare European and American data.It designed a prospective registry of conscutively admitted patients for AHF to high-volume university hospital ED during a 1-year period.The patient's blood pressure, ejection fraction, and hemoglobin values, at admission, were identified as the strongest predictors of all-cause mortality.In AHF not triggered by acute MI, long-term use of statins may be associated with reduced survival.