The death rate among hospitalized heart failure patients with normal and depressed left ventricular ejection fraction in the year following discharge: evolution over a 10-year period.

AIMS

To investigate whether changes in clinical characteristics and treatment strategies between 1991 and 2001 have had an impact on the survival of patients hospitalized with congestive heart failure (CHF) and whether those with normal left ventricular ejection fraction (LVEF> or =50%) differ in this respect from those with depressed LVEF.

METHODS AND RESULTS

We studied 1482 patients who had been admitted to the Cardiology Service of a tertiary Spanish hospital in the last 10 years with CHF. Among the 1110 for whom LVEF was evaluated, the prevalence of normal LVEF rose from 37% in the period 1991-96 (Period 1) to 47% in the period 2000-2001 (Period 3). The intensity of both diagnostic and therapeutic measures also increased during this 10-year period. The 1-year survival rate remained virtually unchanged in the whole group of patients, being 82, 84, and 82% in Periods 1, 2 (1997-99), and 3, respectively, even though the prognosis of patients with depressed LVEF (<50%) improved significantly, with 1-year survival rates of 76, 77, and 84% in Periods 1, 2, and 3, respectively; the normal LVEF group had decreasing 1-year survival rates of 88, 86, and 81% in Periods 1, 2, and 3, respectively, although the increased risk of death was not statistically significant.

CONCLUSION

Although in our centre the death rate among hospitalized CHF patients with depressed LVEF during the first year after discharge has tended to fall over the past 10 years, application of current clinical guidelines has led to no such decrease for patients with normal LVEF. This situation points to a need to reconsider the diagnostic and therapeutic strategy to be employed with this latter group of patients.