BACKGROUND: Heart failure prediction after acute myocardial infarction may have important clinical implications. OBJECTIVE: To analyze the functional echocardiographic variables associated with heart failure in an infarction model in rats. METHODS: The animals were divided into two groups: control and infarction. Subsequently, the infarcted animals were divided into groups: with and without heart failure. The predictive values were assessed by logistic regression. The cutoff values predictive of heart failure were determined using ROC curves. RESULTS: Six months after surgery, 88 infarcted animals and 43 control animals were included in the study. Myocardial infarction increased left cavity diameters and the mass and wall thickness of the left ventricle. Additionally, myocardial infarction resulted in systolic and diastolic dysfunction, characterized by lower area variation fraction values, posterior wall shortening velocity, E-wave deceleration time, associated with higher values of E / A ratio and isovolumic relaxation time adjusted by heart rate. Among the infarcted animals, 54 (61%) developed heart failure. Rats with heart failure have higher left cavity mass index and diameter, associated with worsening of functional variables. The area variation fraction, the E/A ratio, E-wave deceleration time and isovolumic relaxation time adjusted by heart rate were functional variables predictors of heart failure. The cutoff values of functional variables associated with heart failure were: area variation fraction < 31.18%; E / A > 3.077; E-wave deceleration time < 42.11 and isovolumic relaxation time adjusted by heart rate < 69.08. CONCLUSION: In rats followed for 6 months after myocardial infarction, the area variation fraction, E/A ratio, E-wave deceleration time and isovolumic relaxation time adjusted by heart rate are predictors of heart failure onset.
BACKGROUND:Heart failure prediction after acute myocardial infarction may have important clinical implications. OBJECTIVE: To analyze the functional echocardiographic variables associated with heart failure in an infarction model in rats. METHODS: The animals were divided into two groups: control and infarction. Subsequently, the infarcted animals were divided into groups: with and without heart failure. The predictive values were assessed by logistic regression. The cutoff values predictive of heart failure were determined using ROC curves. RESULTS: Six months after surgery, 88 infarcted animals and 43 control animals were included in the study. Myocardial infarction increased left cavity diameters and the mass and wall thickness of the left ventricle. Additionally, myocardial infarction resulted in systolic and diastolic dysfunction, characterized by lower area variation fraction values, posterior wall shortening velocity, E-wave deceleration time, associated with higher values of E / A ratio and isovolumic relaxation time adjusted by heart rate. Among the infarcted animals, 54 (61%) developed heart failure. Rats with heart failure have higher left cavity mass index and diameter, associated with worsening of functional variables. The area variation fraction, the E/A ratio, E-wave deceleration time and isovolumic relaxation time adjusted by heart rate were functional variables predictors of heart failure. The cutoff values of functional variables associated with heart failure were: area variation fraction < 31.18%; E / A > 3.077; E-wave deceleration time < 42.11 and isovolumic relaxation time adjusted by heart rate < 69.08. CONCLUSION: In rats followed for 6 months after myocardial infarction, the area variation fraction, E/A ratio, E-wave deceleration time and isovolumic relaxation time adjusted by heart rate are predictors of heart failure onset.
Authors: Roberto M Lang; Michelle Bierig; Richard B Devereux; Frank A Flachskampf; Elyse Foster; Patricia A Pellikka; Michael H Picard; Mary J Roman; James Seward; Jack S Shanewise; Scott D Solomon; Kirk T Spencer; Martin St John Sutton; William J Stewart Journal: J Am Soc Echocardiogr Date: 2005-12 Impact factor: 5.251
Authors: David Jegger; Xavier Jeanrenaud; Mohammad Nasratullah; Pierre-Guy Chassot; Ajit Mallik; Hendrik Tevaearai; Ludwig K von Segesser; Patrick Segers; Nikolaos Stergiopulos Journal: Am J Physiol Heart Circ Physiol Date: 2005-11-18 Impact factor: 4.733
Authors: Paula F Martinez; Katashi Okoshi; Leonardo A M Zornoff; Silvio A Oliveira; Dijon H S Campos; Aline R R Lima; Ricardo L Damatto; Marcelo D M Cezar; Camila Bonomo; Daniele M Guizoni; Carlos R Padovani; Antonio C Cicogna; Marina P Okoshi Journal: J Appl Physiol (1985) Date: 2011-05-26
Authors: Sergio A R Paiva; Rosangela Novo; Beatriz B Matsubara; Luiz S Matsubara; Paula S Azevedo; Marcos F Minicucci; Alvaro O Campana; Leonardo A M Zornoff Journal: J Nutr Date: 2005-09 Impact factor: 4.798
Authors: Marcos F Minicucci; Paula S Azevedo; Bertha F Polegato; Sergio A R Paiva; Leonardo A M Zornoff Journal: Clin Cardiol Date: 2011-06-17 Impact factor: 2.882
Authors: Marcos F Minicucci; Paula S Azevedo; Silvio A Oliveira; Paula F Martinez; Fernanda Chiuso-Minicucci; Bertha F Polegato; Luis A Justulin; Luiz S Matsubara; Beatriz B Matsubara; Sergio A R Paiva; Leonardo A M Zornoff Journal: Cell Physiol Biochem Date: 2010-10-29
Authors: Eric E Morgan; Michael D Faulx; Tracy A McElfresh; Theodore A Kung; Michael S Zawaneh; William C Stanley; Margaret P Chandler; Brian D Hoit Journal: Am J Physiol Heart Circ Physiol Date: 2004-11 Impact factor: 4.733
Authors: M A Pfeffer; J M Pfeffer; M C Fishbein; P J Fletcher; J Spadaro; R A Kloner; E Braunwald Journal: Circ Res Date: 1979-04 Impact factor: 17.367
Authors: Bruna Paola Murino Rafacho; Priscila Portugal Dos Santos; Andréa de Freitas Gonçalves; Ana Angélica Henrique Fernandes; Katashi Okoshi; Fernanda Chiuso-Minicucci; Paula S Azevedo; Leonardo Antonio Mamede Zornoff; Marcos Ferreira Minicucci; Xiang-Dong Wang; Sergio Alberto Rupp de Paiva Journal: PLoS One Date: 2017-05-11 Impact factor: 3.240