versión On-line ISSN 1852-3862
FLORIO, Lucía; VIGNOLO, Gustavo y POUSO, Jorge. Hemodynamic of chronic heart failure estimated by cardiac eco-Doppler and its evolution to one year. Insuf. card. [online]. 2008, vol.3, n.4, pp. 159-164. ISSN 1852-3862.
Background. The main physiopathological characteristic of heart failure is the diminished cardiac index (CI). There are few references on hemodynamic pattern of chronic heart failure (CHF) assessed by Doppler echocardiography (DE) and its evolution. Objective. To identify the hemodynamic pattern in outpatients with CHF due to systolic dysfunction (SD) and compare it to the basal, through an advanced treatment for CHF program, with those obtained at 6 months and a year. Method. Between 1/10/04 and 30/9/06 seventy-four patients with CHF in sinusal rhythm who attended to DE for admission to an advanced treatment program for CHF were recruited. Left ventricular ejection fraction (LVEF), CI and systemic vascular resistance (SVR) were estimated. Those patients with at least one control with DE at 6 months of income were considered. Values found in CI (L.min.m-2), SVR (dinas.seg.cm-5) and LVEF (%), mean and range, earned in the evolution (6 months and 1 year), were compared to the income data through the sample paired t test (α=0.05). Result. Thirty six patients with at least one control (average: 5.7 months after the entry), mean age 60±9 years, 25 (69%) men, were considered. Basal LVEF was 30±7% [15-40], diminished in 100% of the cases; CI 1.95±0.79 [1.05-4.98] L.min.m-2, diminished in 78% of the cases; and SVR 2098±711 [569-3523] d.seg.cm-5, increased in 86% of the cases. During the first control, LVEF was 35±11% [20-58], CI 1.99±0.69 [0.66-4.26] L.min.m-2 and SVR 2106±763 [885-3770] d.seg.cm-5. LVEF showed, regarding the income, a significant increase (p=0.01). CI and SVR indicated non significant differences, with p=0.85 and p=0.96, respectively. Thirteen patients underwent a second control 12 months after the income with average age 60±9 years, 8 (62%) men. Income values: LVEF 33±7% [33-40], CI 2.06±0.98 [1.30-4.98] (L.min.m-2), and SVR 1975±755 [569-3107] d.seg.cm-5. Second control values: LVEF 40±9% [30-65], CI 1.99±0.55 [1.25-3.02] L.min.m-2, SVR 2134±929 [1382-4526] d.seg.cm-5. LVEF presented a significant increase (p=0.03). CI and SVR indicated non significant differences (p=0.71 and p=0.51). Conclusion. Diminished LVEF and CI, and increased SVR are the expected hemodynamic pattern in patients with CHF due to SD. There was an improvement in LVEF at 6 months and one year after admission to an advanced treatment program without significant changes in either CI or SVR.
Palabras clave : Heart failure; Echocardiography; Cardiac index; Systemic vascular resistance.