Effects of Trypanocidal Treatment on Echocardiographic Parameters in Chagas Cardiomyopathy and Prognostic Value of Wall Motion Score Index: A BENEFIT Trial Echocardiographic Substudy.
Adolescent
Adult
Aged
Chagas Cardiomyopathy
/ diagnosis
Echocardiography
/ methods
Female
Follow-Up Studies
Heart Atria
/ diagnostic imaging
Heart Ventricles
/ diagnostic imaging
Humans
Male
Middle Aged
Nitroreductases
/ therapeutic use
Prognosis
Prospective Studies
Stroke Volume
/ drug effects
Systole
Time Factors
Trypanocidal Agents
/ therapeutic use
Ventricular Function, Left
/ drug effects
Young Adult
Chagas cardiomyopathy
Echocardiography
Prognosis
Trypanocidal therapy
Journal
Journal of the American Society of Echocardiography : official publication of the American Society of Echocardiography
ISSN: 1097-6795
Titre abrégé: J Am Soc Echocardiogr
Pays: United States
ID NLM: 8801388
Informations de publication
Date de publication:
02 2019
02 2019
Historique:
received:
01
07
2018
pubmed:
14
11
2018
medline:
23
6
2020
entrez:
14
11
2018
Statut:
ppublish
Résumé
Serial echocardiographic studies in chronic Chagas cardiomyopathy are scarce. The aims of this study were to evaluate whether therapy with benznidazole modifies the progression of cardiac impairment and to identify baseline echocardiographic parameters related to prognosis. A prospective substudy was conducted in 1,508 patients with chronic Chagas cardiomyopathy randomized to benznidazole or placebo, who underwent two-dimensional echocardiography at enrollment, 2 years, and final follow-up (5.4 years). Left ventricular (LV) ejection fraction, LV wall motion score index (WMSI), indexed left atrial volume, and chamber dimensions were collected and correlated to all-cause death and a composite hard outcome using univariate and multivariate analyses. At enrollment, most patients had normal chamber dimensions, and 70.5% had preserved LV ejection fractions. During follow-up, all chamber dimensions increased similarly in both treatment arms. LV ejection fraction was comparably reduced (55.7 ± 12.7% to 52.1 ± 14.6% vs 56.3 ± 12.7% to 52.8 ± 14.1%) and LV WMSI similarly increased (1.31 ± 0.41 to 1.49 ± 0.03 and 1.27 ± 0.38 to 1.51 ± 0.03) for the benznidazole and placebo groups, respectively (P > .05). A higher baseline LV WMSI was identified in subjects who died compared with those alive at final echocardiography (1.76 ± 0.517 vs 1.271 ± 0.393, P < .0001). There was a significant (P < .0001) graded increase in the risk for the composite outcome with worsening LV WMSI (hazard ratios, 2.27 [95% CI, 1.69-3.06] and 6.42 [95% CI, 4.94-8.33]) and also of death (hazard ratios, 2.45 [95% CI, 1.62-3.71] and 8.99 [95% CI, 6.3-12.82]) for 1 < LV WMSI < 1.5 and LV WMSI > 1.5, respectively. Both LV WMSI and indexed left atrial volume remained independent predictors in multivariate analysis. Trypanocidal treatment had no effect on echocardiographic progression of chronic Chagas cardiomyopathy over 5.4 years. Despite normal global LV systolic function, regional wall motion abnormalities and indexed left atrial volume identified patients at higher risk for hard adverse clinical outcomes.
Sections du résumé
BACKGROUND
Serial echocardiographic studies in chronic Chagas cardiomyopathy are scarce. The aims of this study were to evaluate whether therapy with benznidazole modifies the progression of cardiac impairment and to identify baseline echocardiographic parameters related to prognosis.
METHODS
A prospective substudy was conducted in 1,508 patients with chronic Chagas cardiomyopathy randomized to benznidazole or placebo, who underwent two-dimensional echocardiography at enrollment, 2 years, and final follow-up (5.4 years). Left ventricular (LV) ejection fraction, LV wall motion score index (WMSI), indexed left atrial volume, and chamber dimensions were collected and correlated to all-cause death and a composite hard outcome using univariate and multivariate analyses.
RESULTS
At enrollment, most patients had normal chamber dimensions, and 70.5% had preserved LV ejection fractions. During follow-up, all chamber dimensions increased similarly in both treatment arms. LV ejection fraction was comparably reduced (55.7 ± 12.7% to 52.1 ± 14.6% vs 56.3 ± 12.7% to 52.8 ± 14.1%) and LV WMSI similarly increased (1.31 ± 0.41 to 1.49 ± 0.03 and 1.27 ± 0.38 to 1.51 ± 0.03) for the benznidazole and placebo groups, respectively (P > .05). A higher baseline LV WMSI was identified in subjects who died compared with those alive at final echocardiography (1.76 ± 0.517 vs 1.271 ± 0.393, P < .0001). There was a significant (P < .0001) graded increase in the risk for the composite outcome with worsening LV WMSI (hazard ratios, 2.27 [95% CI, 1.69-3.06] and 6.42 [95% CI, 4.94-8.33]) and also of death (hazard ratios, 2.45 [95% CI, 1.62-3.71] and 8.99 [95% CI, 6.3-12.82]) for 1 < LV WMSI < 1.5 and LV WMSI > 1.5, respectively. Both LV WMSI and indexed left atrial volume remained independent predictors in multivariate analysis.
CONCLUSIONS
Trypanocidal treatment had no effect on echocardiographic progression of chronic Chagas cardiomyopathy over 5.4 years. Despite normal global LV systolic function, regional wall motion abnormalities and indexed left atrial volume identified patients at higher risk for hard adverse clinical outcomes.
Identifiants
pubmed: 30420161
pii: S0894-7317(18)30504-2
doi: 10.1016/j.echo.2018.09.006
pii:
doi:
Substances chimiques
Trypanocidal Agents
0
aromatic NADH-dependent nitroreductase
EC 1.-
Nitroreductases
EC 1.7.-
Types de publication
Journal Article
Multicenter Study
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
286-295.e3Informations de copyright
Copyright © 2018 American Society of Echocardiography. Published by Elsevier Inc. All rights reserved.