Left ventricular systolic function monitoring in asymptomatic dialysis patients: a prospective cohort study.
Although it is well established that compromised systolic function predicts cardiovascular (CV) complications in symptomatic and asymptomatic patients with ESRD, it still is unknown whether repeated echocardiographic measurements of systolic function in asymptomatic patients with ESRD is useful for monitoring the evolution of cardiomyopathy in these patients. The prognostic value for CV events of changes in systolic function, as measured by midwall fractional shortening (mwFS) in a cohort of 191 dialysis patients, was tested. Echocardiography was performed twice, 17 +/- 2 mo apart. Changes in mwFS (ch-mwFS) that occurred between the second and the first echocardiographic studies then were used to predict CV events during the ensuing 27 +/- 13 mo. After the second echocardiographic study, 85 patients had incident CV events. In a Kaplan-Meier analysis, there was a graded increase in the risk for fatal and nonfatal CV events across ch-mwFS quartiles (P = 0.005). On multivariate Cox regression analysis, ch-mwFS maintained an independent association with CV outcomes. In this analysis, the risk for CV events was 51% lower in patients who manifested an increase in mwFS (hazard ratio 0.49; 95% confidence interval 0.27 to 0.88; P = 0.02) than in those who had a decrease in mwFS. Changes in mwFS have an independent prognostic value for CV events, and periodic echocardiographic studies of systolic function are useful for monitoring asymptomatic dialysis patients.
Zoccali
Carmine
C
National Research Council-Institute of Biomedicine, Clinical Epidemiology and Pathophysiology of Renal Diseases and Hypertension of Reggio Calabria, Reggio Calabria, Italy. carmine.zoccali@tin.it
Benedetto
Francesco A
FA
Tripepi
Giovanni
G
Mallamaci
Francesca
F
Rapisarda
Francesco
F
Seminara
Giuseppe
G
Bonanno
Graziella
G
Malatino
Lorenzo S
LS
D015331:Cohort Studies; D004452:Echocardiography / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D007558:Italy / Q000453:epidemiology; D007676:Kidney Failure, Chronic / Q000000981:diagnostic imaging* / Q000401:mortality* / Q000534:rehabilitation; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care / Q000379:methods; D011446:Prospective Studies; D006435:Renal Dialysis / Q000706:statistics & numerical data*; D015203:Reproducibility of Results; D018570:Risk Assessment / Q000379:methods*; D012307:Risk Factors; D012680:Sensitivity and Specificity; D016019:Survival Analysis; D015996:Survival Rate; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging* / Q000401:mortality