BACKGROUND: A significant percentage of pharmacologic stress echocardiograms produce suboptimal images despite the use of second harmonic imaging. Intravenous continuous infusion of myocardial ultrasound contrast may enhance endocardial border delineation during dobutamine-atropine stress echocardiography (DASE), improving wall-motion analysis. PATIENTS AND METHODS: We prospectively studied 68 patients (41 males and 27 females), mean age 58 years, with DASE during intravenous infusion of contrast using second harmonic imaging. Dobutamine was infused in scalar doses of 5 microg/kg/min to 40 microg/kg/min, and atropine was administered in doses of up to 1 mg. We diluted 0.1 mL of perfluorocarbon-exposed sonicated dextrose albumin (PESDA) microbubbles into 80 mL of saline solution, which was used for continuous intravenous infusion. Blinded reviewers used a 16-segment model at rest and peak DASE to analyze segmental wall delineation in two sets of images for each patient, with and without contrast. An endocardial delineation score of 0-3 (nondelineated to excellent delineation) was given to each segment. An endocardial delineation score index (EDSI), the number of endocardial delineation scores for each set of images divided by 16, was created. RESULTS: The analysis of the mean EDSI for the 2176 segments was 1.46 (+/- 0.43) at rest and 1.30 (+/- 0.48) at peak for noncontrast images and 2.22 (+/- 0.52) and 2.29 (+/- 0.52) for contrast images. Complete left ventricle opacification was obtained in all patients, with a mean dose of 4 mL/min, although in 15 (22%) patients, signs of apical bubble destruction occurred. There were 1768 (81%) of 2176 segments delineated without contrast enhancement and 2057 (95%) of 2176 with enhancement (P < 0.05). CONCLUSION: Continuous infusion of myocardial ultrasound contrast improves endocardial border delineation using second harmonic imaging in patients undergoing DASE.
BACKGROUND: A significant percentage of pharmacologic stress echocardiograms produce suboptimal images despite the use of second harmonic imaging. Intravenous continuous infusion of myocardial ultrasound contrast may enhance endocardial border delineation during dobutamine-atropine stress echocardiography (DASE), improving wall-motion analysis. PATIENTS AND METHODS: We prospectively studied 68 patients (41 males and 27 females), mean age 58 years, with DASE during intravenous infusion of contrast using second harmonic imaging. Dobutamine was infused in scalar doses of 5 microg/kg/min to 40 microg/kg/min, and atropine was administered in doses of up to 1 mg. We diluted 0.1 mL of perfluorocarbon-exposed sonicated dextrose albumin (PESDA) microbubbles into 80 mL of saline solution, which was used for continuous intravenous infusion. Blinded reviewers used a 16-segment model at rest and peak DASE to analyze segmental wall delineation in two sets of images for each patient, with and without contrast. An endocardial delineation score of 0-3 (nondelineated to excellent delineation) was given to each segment. An endocardial delineation score index (EDSI), the number of endocardial delineation scores for each set of images divided by 16, was created. RESULTS: The analysis of the mean EDSI for the 2176 segments was 1.46 (+/- 0.43) at rest and 1.30 (+/- 0.48) at peak for noncontrast images and 2.22 (+/- 0.52) and 2.29 (+/- 0.52) for contrast images. Complete left ventricle opacification was obtained in all patients, with a mean dose of 4 mL/min, although in 15 (22%) patients, signs of apical bubble destruction occurred. There were 1768 (81%) of 2176 segments delineated without contrast enhancement and 2057 (95%) of 2176 with enhancement (P < 0.05). CONCLUSION: Continuous infusion of myocardial ultrasound contrast improves endocardial border delineation using second harmonic imaging in patients undergoing DASE.
Authors: José Carlos Nicolau; Gilson Soares Feitosa Filho; João Luiz Petriz; Remo Holanda de Mendonça Furtado; Dalton Bertolim Précoma; Walmor Lemke; Renato Delascio Lopes; Ari Timerman; José A Marin Neto; Luiz Bezerra Neto; Bruno Ferraz de Oliveira Gomes; Eduardo Cavalcanti Lapa Santos; Leopoldo Soares Piegas; Alexandre de Matos Soeiro; Alexandre Jorge de Andrade Negri; Andre Franci; Brivaldo Markman Filho; Bruno Mendonça Baccaro; Carlos Eduardo Lucena Montenegro; Carlos Eduardo Rochitte; Carlos José Dornas Gonçalves Barbosa; Cláudio Marcelo Bittencourt das Virgens; Edson Stefanini; Euler Roberto Fernandes Manenti; Felipe Gallego Lima; Francisco das Chagas Monteiro Júnior; Harry Correa Filho; Henrique Patrus Mundim Pena; Ibraim Masciarelli Francisco Pinto; João Luiz de Alencar Araripe Falcão; Joberto Pinheiro Sena; José Maria Peixoto; Juliana Ascenção de Souza; Leonardo Sara da Silva; Lilia Nigro Maia; Louis Nakayama Ohe; Luciano Moreira Baracioli; Luís Alberto de Oliveira Dallan; Luis Augusto Palma Dallan; Luiz Alberto Piva E Mattos; Luiz Carlos Bodanese; Luiz Eduardo Fonteles Ritt; Manoel Fernandes Canesin; Marcelo Bueno da Silva Rivas; Marcelo Franken; Marcos José Gomes Magalhães; Múcio Tavares de Oliveira Júnior; Nivaldo Menezes Filgueiras Filho; Oscar Pereira Dutra; Otávio Rizzi Coelho; Paulo Ernesto Leães; Paulo Roberto Ferreira Rossi; Paulo Rogério Soares; Pedro Alves Lemos Neto; Pedro Silvio Farsky; Rafael Rebêlo C Cavalcanti; Renato Jorge Alves; Renato Abdala Karam Kalil; Roberto Esporcatte; Roberto Luiz Marino; Roberto Rocha Corrêa Veiga Giraldez; Romeu Sérgio Meneghelo; Ronaldo de Souza Leão Lima; Rui Fernando Ramos; Sandra Nivea Dos Reis Saraiva Falcão; Talia Falcão Dalçóquio; Viviana de Mello Guzzo Lemke; William Azem Chalela; Wilson Mathias Júnior Journal: Arq Bras Cardiol Date: 2021-07 Impact factor: 2.667
Authors: Luiz Antonio Machado César; Antonio de Pádua Mansur; João Fernando Monteiro Ferreira Journal: Arq Bras Cardiol Date: 2015-10 Impact factor: 2.000