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Salas-Rabaza JA, Andrade JL, Us-Santamaría R, Morales-Rico P, Mayora G, Aguirre FJ, Fecci-Machuca V, Gade-Palma EM, Thalasso F. Impacts of leaks and gas accumulation on closed chamber methods for measuring methane and carbon dioxide fluxes from tree stems. Sci Total Environ 2023; 904:166358. [PMID: 37595911 DOI: 10.1016/j.scitotenv.2023.166358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/14/2023] [Accepted: 08/15/2023] [Indexed: 08/20/2023]
Abstract
Accurate measurements of methane (CH4) and carbon dioxide (CO2) fluxes from tree stems are important for understanding greenhouse gas emissions. Closed chamber methods are commonly employed for this purpose; however, leaks between the chamber and the atmosphere as well as gas accumulation, known as the concentration buildup effect, can impact flux measurements significantly. In this study, we investigated the impacts of concentration buildup and leaks on semi-rigid closed chamber methods. Field measurements were conducted on six tree species, including three species from a Mexican mangrove ecosystem and three species from a Magellanic sub-Antarctic forest. Systematic observations revealed significant leak flow rates, ranging from 0.00 to 465 L h-1, with a median value of 1.25 ± 75.67 L h-1. We tested the efficacy of using cement to reduce leaks, achieving a leak flow rate reduction of 46-98 % without complete elimination. Our study also demonstrates a clear and substantial impact of concentration buildup on CH4 flux measurements, while CO2 flux measurements were relatively less affected across all tree species studied. Our results show that the combined effects of leaks and concentration buildup can lead to an underestimation of CH4 emissions by an average of 40 ± 20 % and CO2 emissions by 22 ± 22 %, depending on the bark roughness. Based on these findings, we recall a straightforward yet effective method to minimize experimental errors associated with these phenomena, previously established, and reiterated in the current context, for calculating emissions that considers effects of leaks and concentration buildup, while eliminating the need for separate determinations of these phenomena. Overall, the results, combined with a literature review, suggest that our current estimates of GHG flux from tree stems are currently underestimated.
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Affiliation(s)
- Julio A Salas-Rabaza
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, A.C. (CICY), Calle 43 No. 130, Chuburná de Hidalgo, 97205 Mérida, Mexico; Cape Horn International Center, Universidad de Magallanes, Av. Bulnes 01855, Punta Arenas 6210427, Chile
| | - José Luis Andrade
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, A.C. (CICY), Calle 43 No. 130, Chuburná de Hidalgo, 97205 Mérida, Mexico
| | - Roberth Us-Santamaría
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, A.C. (CICY), Calle 43 No. 130, Chuburná de Hidalgo, 97205 Mérida, Mexico
| | - Pablo Morales-Rico
- Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav), Av. IPN 2508, Mexico City 07360, Mexico
| | - Gisela Mayora
- Instituto Nacional de Limnología (Inali) Ciudad Universitaria, Colectora Ruta Nac. 168, Paraje El Pozo 3000, Santa Fé, Argentina
| | - Francisco Javier Aguirre
- Cape Horn International Center, Universidad de Magallanes, Av. Bulnes 01855, Punta Arenas 6210427, Chile
| | - Vicente Fecci-Machuca
- Cape Horn International Center, Universidad de Magallanes, Av. Bulnes 01855, Punta Arenas 6210427, Chile
| | - Eugenia M Gade-Palma
- Cape Horn International Center, Universidad de Magallanes, Av. Bulnes 01855, Punta Arenas 6210427, Chile
| | - Frederic Thalasso
- Cape Horn International Center, Universidad de Magallanes, Av. Bulnes 01855, Punta Arenas 6210427, Chile; Departamento de Biotecnología y Bioingeniería, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (Cinvestav), Av. IPN 2508, Mexico City 07360, Mexico.
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2
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Zotz G, Andrade JL, Einzmann HJR. CAM plants: their importance in epiphyte communities and prospects with global change. Ann Bot 2023; 132:685-698. [PMID: 36617243 PMCID: PMC10799991 DOI: 10.1093/aob/mcac158] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/08/2022] [Accepted: 12/15/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND AND SCOPE The epiphytic life form characterizes almost 10 % of all vascular plants. Defined by structural dependence throughout their life and their non-parasitic relationship with the host, the term epiphyte describes a heterogeneous and taxonomically diverse group of plants. This article reviews the importance of crassulacean acid metabolism (CAM) among epiphytes in current climatic conditions and explores the prospects under global change. RESULTS AND CONCLUSIONS We question the view of a disproportionate importance of CAM among epiphytes and its role as a 'key innovation' for epiphytism but do identify ecological conditions in which epiphytic existence seems to be contingent on the presence of this photosynthetic pathway. Possibly divergent responses of CAM and C3 epiphytes to future changes in climate and land use are discussed with the help of experimental evidence, current distributional patterns and the results of several long-term descriptive community studies. The results and their interpretation aim to stimulate a fruitful discussion on the role of CAM in epiphytes in current climatic conditions and in altered climatic conditions in the future.
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Affiliation(s)
- Gerhard Zotz
- Functional Ecology Group, Institute of Biology and Environmental Sciences, Carl von Ossietzky University Oldenburg, Box 5634, D-26046 Oldenburg, Germany
- Smithsonian Tropical Research Institute, Box 0843-03092, Panama, Republic of Panama
| | - José Luis Andrade
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, Calle 43 No. 130, Chuburná de Hidalgo, Mérida, Yucatán, Mexico
| | - Helena J R Einzmann
- Functional Ecology Group, Institute of Biology and Environmental Sciences, Carl von Ossietzky University Oldenburg, Box 5634, D-26046 Oldenburg, Germany
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3
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Cabañas-Mendoza MDR, Andrade JL, Sauri-Duch E, Hernández-Terrones L, Fuentes G, Santamaría JM. Lead tolerance of Laguncularia racemosa is associated to high proline accumulation and high antioxidant capacities. Biometals 2023:10.1007/s10534-023-00488-8. [PMID: 36658453 DOI: 10.1007/s10534-023-00488-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 01/09/2023] [Indexed: 01/21/2023]
Abstract
Mangrove forests are threatened by the continuous discharge of inorganic pollutants and studies show that coasts receive high levels of heavy metals, from which lead (Pb) is one of the most persistent and toxic. In the present study, lead accumulation capacity, as well as its toxicological effects and tolerance mechanisms, such as proline accumulation and increased antioxidant capacity were evaluated in two contrasting mangrove species: Avicennia germinans and Laguncularia racemosa. Six-month-old plants were exposed to different concentrations of lead nitrate (0, 75, 150, and 300 µM) and samples of roots and leaves were taken from all treatments at different times during a 30d exposure period. Both species accumulated Pb in their tissues mainly in the roots, but L. racemosa had a greater capacity to accumulate Pb than A. germinans. Nevertheless, lead exposure caused less leaf chlorosis, lower reduction in the efficiency of photosystem II, lower reduction of daily photosynthetic rates, and lower electrolyte leakage in L. racemosa than in A. germinans. In line with those results, L. racemosa, in response to Pb exposure, accumulated more proline and showed higher antioxidant capacity than A. germinans, in both roots and leaves. Altogether, L. racemosa might be more suitable for restoration purposes, as it is not only capable of accumulating more Pb in its tissues but also shows greater tolerance to the stress caused by lead.
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Affiliation(s)
- María Del Refugio Cabañas-Mendoza
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Recursos Naturales, Calle 43, 130. Chuburná de Hidalgo, 97205, Mérida, Yucatán, México
| | - José Luis Andrade
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Recursos Naturales, Calle 43, 130. Chuburná de Hidalgo, 97205, Mérida, Yucatán, México
| | - Enrique Sauri-Duch
- Departamento de Instrumentación Analítica, Tecnólogico Nacional de México, Avenida Tecnológico Km 4.5 S/N, 97118, Mérida, Yucatán, México
| | - Laura Hernández-Terrones
- Departamento de Ciencias Básicas e Ingenierías, Universidad del Caribe, Esquina Fraccionamiento Tabachines, SM78 L1, 77528, Cancún, Quintana Roo, México
| | - Gabriela Fuentes
- , Calle 6a 279a Jardines de Vista Alegre, 97138, Mérida, Yucatán, México
| | - Jorge M Santamaría
- Centro de Investigación Científica de Yucatán, A.C., Unidad de Biotecnología, Calle 43, 130. Chuburná de Hidalgo, 97205, Mérida, Yucatán, México.
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4
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Reyes-García C, Pereira-Zaldívar NA, Espadas-Manrique C, Tamayo-Chim M, Chilpa-Galván N, Cach-Pérez MJ, Ramírez-Medina M, Benavides AM, Hietz P, Zotz G, Andrade JL, Cardelús C, de Paula Oliveira R, Einzmann HJR, Guzmán Jacob V, Krömer T, Pinzón JP, Sarmento Cabral J, Wanek W, Woods C. New Proposal of Epiphytic Bromeliaceae Functional Groups to Include Nebulophytes and Shallow Tanks. Plants (Basel) 2022; 11:plants11223151. [PMID: 36432880 PMCID: PMC9693514 DOI: 10.3390/plants11223151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/22/2022] [Accepted: 10/25/2022] [Indexed: 05/14/2023]
Abstract
The Bromeliaceae family has been used as a model to study adaptive radiation due to its terrestrial, epilithic, and epiphytic habits with wide morpho-physiological variation. Functional groups described by Pittendrigh in 1948 have been an integral part of ecophysiological studies. In the current study, we revisited the functional groups of epiphytic bromeliads using a 204 species trait database sampled throughout the Americas. Our objective was to define epiphytic functional groups within bromeliads based on unsupervised classification, including species from the dry to the wet end of the Neotropics. We performed a hierarchical cluster analysis with 16 functional traits and a discriminant analysis, to test for the separation between these groups. Herbarium records were used to map species distributions and to analyze the climate and ecosystems inhabited. The clustering supported five groups, C3 tank and CAM tank bromeliads with deep tanks, while the atmospheric group (according to Pittendrigh) was divided into nebulophytes, bromeliads with shallow tanks, and bromeliads with pseudobulbs. The two former groups showed distinct traits related to resource (water) acquisition, such as fog (nebulophytes) and dew (shallow tanks). We discuss how the functional traits relate to the ecosystems inhabited and the relevance of acknowledging the new functional groups.
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Affiliation(s)
- Casandra Reyes-García
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, 43 St., Chuburna de Hidalgo, Mérida 97205, Mexico
- Correspondence: ; Tel.: +52-999-942-83-30
| | - Narcy Anai Pereira-Zaldívar
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, 43 St., Chuburna de Hidalgo, Mérida 97205, Mexico
| | - Celene Espadas-Manrique
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, 43 St., Chuburna de Hidalgo, Mérida 97205, Mexico
| | - Manuela Tamayo-Chim
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, 43 St., Chuburna de Hidalgo, Mérida 97205, Mexico
| | - Nahlleli Chilpa-Galván
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, 43 St., Chuburna de Hidalgo, Mérida 97205, Mexico
| | | | - Marypaz Ramírez-Medina
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, 43 St., Chuburna de Hidalgo, Mérida 97205, Mexico
| | | | - Peter Hietz
- Department of Integrative Biology and Biodiversity Research, University of Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Vienna, Austria
| | - Gerhard Zotz
- Functional Ecology Group, Institute of Biology and Environmental Sciences, University of Oldenburg, Box 2503, D-26111 Oldenburg, Germany
- Smithsonian Tropical Research Institute, Panama City 32402, Panama
| | - José Luis Andrade
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, 43 St., Chuburna de Hidalgo, Mérida 97205, Mexico
| | - Catherine Cardelús
- Departments of Biology and Environmental Studies, Colgate University, 13 Oak Dr E Ext, Hamilton, NY 13346, USA
| | | | - Helena J. R. Einzmann
- Functional Ecology Group, Institute of Biology and Environmental Sciences, University of Oldenburg, Box 2503, D-26111 Oldenburg, Germany
| | - Valeria Guzmán Jacob
- Biodiversity, Macroecology and Biogeography, University of Goettingen, 37073 Göttingen, Germany
| | - Thorsten Krömer
- Centro de Investigaciones Tropicales, Universidad Veracruzana, Veracruz 91090, Mexico
| | - Juan P. Pinzón
- Departamento de Botánica, Campus de Ciencias Biológicas y Agropecuarias, Universidad Autónoma de Yucatán, Road Mérida-Xmatkuil km 15.5, Mérida 97315, Mexico
| | | | - Wolfgang Wanek
- Center of Microbiology and Environmental Systems Science, University of Vienna, Djerassipl, 1030 Vienna, Austria
| | - Carrie Woods
- Department of Biology, University of Puget Sound, 1500 N Warner St., Tacoma, WA 98416, USA
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5
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Poorter L, Craven D, Jakovac CC, van der Sande MT, Amissah L, Bongers F, Chazdon RL, Farrior CE, Kambach S, Meave JA, Muñoz R, Norden N, Rüger N, van Breugel M, Almeyda Zambrano AM, Amani B, Andrade JL, Brancalion PHS, Broadbent EN, de Foresta H, Dent DH, Derroire G, DeWalt SJ, Dupuy JM, Durán SM, Fantini AC, Finegan B, Hernández-Jaramillo A, Hernández-Stefanoni JL, Hietz P, Junqueira AB, N'dja JK, Letcher SG, Lohbeck M, López-Camacho R, Martínez-Ramos M, Melo FPL, Mora F, Müller SC, N'Guessan AE, Oberleitner F, Ortiz-Malavassi E, Pérez-García EA, Pinho BX, Piotto D, Powers JS, Rodríguez-Buriticá S, Rozendaal DMA, Ruíz J, Tabarelli M, Teixeira HM, Valadares de Sá Barretto Sampaio E, van der Wal H, Villa PM, Fernandes GW, Santos BA, Aguilar-Cano J, de Almeida-Cortez JS, Alvarez-Davila E, Arreola-Villa F, Balvanera P, Becknell JM, Cabral GAL, Castellanos-Castro C, de Jong BHJ, Nieto JE, Espírito-Santo MM, Fandino MC, García H, García-Villalobos D, Hall JS, Idárraga A, Jiménez-Montoya J, Kennard D, Marín-Spiotta E, Mesquita R, Nunes YRF, Ochoa-Gaona S, Peña-Claros M, Pérez-Cárdenas N, Rodríguez-Velázquez J, Villanueva LS, Schwartz NB, Steininger MK, Veloso MDM, Vester HFM, Vieira ICG, Williamson GB, Zanini K, Hérault B. Multidimensional tropical forest recovery. Science 2021; 374:1370-1376. [PMID: 34882461 DOI: 10.1126/science.abh3629] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Lourens Poorter
- Forest Ecology and Forest Management Group, Wageningen University, Wageningen, Netherlands
| | - Dylan Craven
- Centro de Modelación y Monitoreo de Ecosistemas, Universidad Mayor, Santiago, Chile
| | - Catarina C Jakovac
- Forest Ecology and Forest Management Group, Wageningen University, Wageningen, Netherlands.,Departamento de Fitotecnia, Universidade Federal de Santa Catarina. Rod. Admar Gonzaga, Florianópolis, SC, Brazil
| | - Masha T van der Sande
- Forest Ecology and Forest Management Group, Wageningen University, Wageningen, Netherlands
| | - Lucy Amissah
- CSIR-Forestry Research Institute of Ghana, KNUST, Kumasi, Ghana
| | - Frans Bongers
- Forest Ecology and Forest Management Group, Wageningen University, Wageningen, Netherlands
| | - Robin L Chazdon
- Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT, USA.,Tropical Forests and People Research Centre, University of the Sunshine Coast, Maroochydore DC, QLD, Australia
| | | | - Stephan Kambach
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - Jorge A Meave
- Departamento de Ecología y Recursos Naturales, Facultad de Ciencias, Universidad Nacional Autónoma de México, Coyoacán, Mexico City, Mexico
| | - Rodrigo Muñoz
- Forest Ecology and Forest Management Group, Wageningen University, Wageningen, Netherlands.,Departamento de Ecología y Recursos Naturales, Facultad de Ciencias, Universidad Nacional Autónoma de México, Coyoacán, Mexico City, Mexico
| | - Natalia Norden
- Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Bogotá, Colombia
| | - Nadja Rüger
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany.,Department of Economics, University of Leipzig, Leipzig, Germany.,Smithsonian Tropical Research Institute, Ancón, Balboa, Panama
| | - Michiel van Breugel
- SI ForestGEO, Smithsonian Tropical Research Institute, Ancón, Balboa, Panama.,Yale-NUS College, Singapore, Singapore.,Department of Biological Sciences, National University of Singapore, Singapore, Singapore
| | | | - Bienvenu Amani
- UFR Agroforesterie, Université Jean Lorougnon Guédé Daloa, Daloa, Côte d'Ivoire
| | - José Luis Andrade
- Centro de Investigación Científica de Yucatán A.C. Unidad de Recursos Naturales, Colonia Chuburná de Hidalgo, Mérida, Yucatán, Mexico
| | - Pedro H S Brancalion
- Department of Forest Sciences, "Luiz de Queiroz" College of Agriculture, University of São Paulo, Piracicaba, São Paulo, Brazil
| | - Eben N Broadbent
- Spatial Ecology and Conservation Lab, School of Forest Resources and Conservation, University of Florida, Gainesville, FL, USA
| | - Hubert de Foresta
- UMR AMAP, Institut de Recherche pour le Développement (IRD), Montpellier, France
| | - Daisy H Dent
- Smithsonian Tropical Research Institute, Ancón, Balboa, Panama.,Biological and Environmental Sciences, University of Stirling, Stirling, UK
| | - Géraldine Derroire
- CIRAD, UMR EcoFoG (AgroParistech, CNRS, INRAE, Université des Antilles, Université de la Guyane), Campus Agronomique, Kourou, French Guiana
| | - Saara J DeWalt
- Department of Biological Sciences, Clemson University, Clemson, SC, USA
| | - Juan M Dupuy
- Centro de Investigación Científica de Yucatán A.C. Unidad de Recursos Naturales, Colonia Chuburná de Hidalgo, Mérida, Yucatán, Mexico
| | - Sandra M Durán
- Earth and Atmospheric Sciences Department, University of Alberta, Edmonton, AB, Canada.,Department of Ecology and Evolutionary Biology, University of Minnesota, St. Paul, MN, USA
| | | | - Bryan Finegan
- CATIE-Centro Agronómico Tropical de Investigación y Enseñanza, Turrialba, Costa Rica
| | | | - José Luis Hernández-Stefanoni
- Centro de Investigación Científica de Yucatán A.C. Unidad de Recursos Naturales, Colonia Chuburná de Hidalgo, Mérida, Yucatán, Mexico
| | - Peter Hietz
- Institute of Botany, University of Natural Resources and Life Sciences, Vienna, Austria
| | - André B Junqueira
- Institut de Ciència i Tecnologia Ambientals, Universitat Autònoma de Barcelona, Cerdanyola del Vallès, Barcelona, Spain
| | - Justin Kassi N'dja
- Departement of Bioscience, University Felix Houphouet-Boigny, Abidjan, Côte d'Ivoire
| | | | - Madelon Lohbeck
- Forest Ecology and Forest Management Group, Wageningen University, Wageningen, Netherlands.,World Agroforestry Centre, ICRAF, United Nations Avenue, Gigiri, Nairobi, Kenya
| | - René López-Camacho
- Universidad Distrital Francisco José de Caldas, Facultad de Medio Ambiente y Recursos Naturales, Bogotá, Colombia
| | - Miguel Martínez-Ramos
- Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México, Morelia, Michoacán, Mexico
| | - Felipe P L Melo
- Departamento de Botânica, Universidade Federal de Pernambuco, Recife, Brazil
| | - Francisco Mora
- Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México, Morelia, Michoacán, Mexico
| | - Sandra C Müller
- Departamento de Ecologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Anny E N'Guessan
- Departement of Bioscience, University Felix Houphouet-Boigny, Abidjan, Côte d'Ivoire
| | | | - Edgar Ortiz-Malavassi
- Instituto Tecnológico de Costa Rica, Escuela de Ingeniería Forestal, Cartago, Costa Rica
| | - Eduardo A Pérez-García
- Departamento de Ecología y Recursos Naturales, Facultad de Ciencias, Universidad Nacional Autónoma de México, Coyoacán, Mexico City, Mexico
| | - Bruno X Pinho
- Departamento de Botânica, Universidade Federal de Pernambuco, Recife, Brazil
| | - Daniel Piotto
- Centro de Formação em Ciências Agroflorestais, Universidade Federal do Sul da Bahia, Itabuna, BA, Brazil
| | - Jennifer S Powers
- Department of Ecology, Evolution and Behavior, University of Minnesota, St. Paul, MN, USA.,Department of Plant and Microbial Biology, University of Minnesota, St. Paul, MN, USA
| | | | - Danaë M A Rozendaal
- Plant Production Systems Group, Wageningen University and Research, Wageningen, Netherlands.,Centre for Crop Systems Analysis, Wageningen University and Research, Wageningen, Netherlands
| | - Jorge Ruíz
- Programa de Estudios de Posgrado en Geografia, Convenio Universidad Pedagogica y Tecnológica de Colombia-Instituto Geografico Agustin Codazzi, Bogotá, Colombia
| | - Marcelo Tabarelli
- Departamento de Botânica, Universidade Federal de Pernambuco, Recife, Brazil
| | - Heitor Mancini Teixeira
- Plant Production Systems Group, Wageningen University and Research, Wageningen, Netherlands.,Farming Systems Ecology, Wageningen University, Wageningen, Netherlands.,Copernicus Institute, Utrecht University, Utrecht, Netherlands
| | | | - Hans van der Wal
- Departamento de Agricultura, Sociedad y Ambiente, El Colegio de la Frontera Sur - Unidad Villahermosa, Centro, Tabasco, México
| | - Pedro M Villa
- Program of Botany, Departamento de Biologia Vegetal, Laboratório de Ecologia e Evolução de Plantas, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil.,Fundación para la Conservación de la Biodiversidad (PROBIODIVERSA), Mérida, Mérida, Venezuela
| | - Geraldo W Fernandes
- Ecologia Evolutiva e Biodiversidade/DBG, ICB, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - José Aguilar-Cano
- Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Bogotá, Colombia
| | | | | | - Felipe Arreola-Villa
- Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México, Morelia, Michoacán, Mexico
| | - Patricia Balvanera
- Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México, Morelia, Michoacán, Mexico
| | | | - George A L Cabral
- Departamento de Botânica, Universidade Federal de Pernambuco, Recife, Brazil
| | | | - Ben H J de Jong
- Department of Sustainability Science, El Colegio de la Frontera Sur, Lerma, Campeche, Mexico
| | - Jhon Edison Nieto
- Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Bogotá, Colombia
| | - Mário M Espírito-Santo
- Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Montes Claros, Minas Gerais, Brazil
| | - Maria C Fandino
- Fondo Patrimonio Natural para la Biodiversidad y Areas Protegidas, Bogota, Colombia
| | - Hernando García
- Instituto de Investigación de Recursos Biológicos Alexander von Humboldt, Bogotá, Colombia
| | | | - Jefferson S Hall
- SI ForestGEO, Smithsonian Tropical Research Institute, Ancón, Balboa, Panama
| | - Alvaro Idárraga
- Fundación Jardín Botánico de Medellín, Herbario JAUM, Medellín, Colombia
| | | | - Deborah Kennard
- Department of Physical and Environmental Sciences, Colorado Mesa University, Grand Junction, CO, USA
| | | | - Rita Mesquita
- Biological Dynamics of Forest Fragments Project, Environmental Dynamics Research Coordination, Instituto Nacional de Pesquisas da Amazonia, Manaus, Amazonas, Brazil
| | - Yule R F Nunes
- Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Montes Claros, Minas Gerais, Brazil
| | - Susana Ochoa-Gaona
- Department of Sustainability Science, El Colegio de la Frontera Sur, Lerma, Campeche, Mexico
| | - Marielos Peña-Claros
- Forest Ecology and Forest Management Group, Wageningen University, Wageningen, Netherlands
| | - Nathalia Pérez-Cárdenas
- Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México, Morelia, Michoacán, Mexico
| | - Jorge Rodríguez-Velázquez
- Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México, Morelia, Michoacán, Mexico
| | - Lucía Sanaphre Villanueva
- Centro de Investigación Científica de Yucatán A.C. Unidad de Recursos Naturales, Colonia Chuburná de Hidalgo, Mérida, Yucatán, Mexico.,Consejo Nacional de Ciencia y Tecnologia, Centro del Cambio Global y la Sustentabilidad, Tabasco, Mexico
| | - Naomi B Schwartz
- Department of Geography, University of British Columbia, Vancouver, BC, Canada
| | - Marc K Steininger
- Department of Geographical Sciences, University of Maryland, College Park, MD, USA
| | - Maria D M Veloso
- Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Montes Claros, Minas Gerais, Brazil
| | - Henricus F M Vester
- Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Amsterdam, Netherlands
| | | | - G Bruce Williamson
- Biological Dynamics of Forest Fragments Project, Environmental Dynamics Research Coordination, Instituto Nacional de Pesquisas da Amazonia, Manaus, Amazonas, Brazil.,Department of Biological Sciences, Louisiana State University, Baton Rouge, LA, USA
| | - Kátia Zanini
- Departamento de Ecologia, Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Bruno Hérault
- CIRAD, UPR Forêts et Sociétés, Yamoussoukro, Côte d'Ivoire.,Forêts et Sociétés, Université Montpellier, CIRAD, Montpellier, France.,Institut National Polytechnique Félix Houphouët-Boigny, INP-HB, Yamoussoukro, Côte d'Ivoire
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6
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Palomo-Kumul J, Valdez-Hernández M, Islebe GA, Cach-Pérez MJ, Andrade JL. El Niño-Southern Oscillation affects the water relations of tree species in the Yucatan Peninsula, Mexico. Sci Rep 2021; 11:10451. [PMID: 34001943 PMCID: PMC8129073 DOI: 10.1038/s41598-021-89835-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 04/30/2021] [Indexed: 11/09/2022] Open
Abstract
We evaluated the effect of ENSO 2015/16 on the water relations of eight tree species in seasonally dry tropical forests of the Yucatan Peninsula, Mexico. The functional traits: wood density, relative water content in wood, xylem water potential and specific leaf area were recorded during the rainy season and compared in three consecutive years: 2015 (pre-ENSO conditions), 2016 (ENSO conditions) and 2017 (post-ENSO conditions). We analyzed tree size on the capacity to respond to water deficit, considering young and mature trees, and if this response is distinctive in species with different leaf patterns in seasonally dry tropical forests distributed along a precipitation gradient (700–1200 mm year−1). These traits showed a strong decrease in all species in response to water stress in 2016, mainly in the driest site. Deciduous species had lower wood density, higher predawn water potential and higher specific leaf area than evergreen species. In all cases, mature trees were more tolerant to drought. In the driest site, there was a significant reduction in water status, regardless of their leaf phenology, indicating that seasonally dry tropical forests are highly vulnerable to ENSO. Vulnerability of deciduous species is intensified in the driest areas and in the youngest trees.
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Affiliation(s)
- Jorge Palomo-Kumul
- El Colegio de la Frontera Sur Unidad Chetumal, Herbario, 77014, Chetumal, Q Roo, México
| | - Mirna Valdez-Hernández
- El Colegio de la Frontera Sur Unidad Chetumal, Herbario, 77014, Chetumal, Q Roo, México.
| | - Gerald A Islebe
- El Colegio de la Frontera Sur Unidad Chetumal, Herbario, 77014, Chetumal, Q Roo, México
| | - Manuel J Cach-Pérez
- Departamento de Agricultura, Sociedad y Ambiente, CONACYT-El Colegio de la Frontera Sur Unidad Villahermosa, 86280, Villahermosa, TAB, México
| | - José Luis Andrade
- Centro de Investigación Científica de Yucatán, Unidad de Recursos Naturales A.C., 97205, Mérida, YUC, México
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7
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Andrade JL, Paschôa AF, van Bellen B. Bridge Graft to a Small Distal Artery after Fistula Ligation for Angioaccess-Induced Ischemia: Report of Two Cases. J Vasc Access 2018; 5:33-5. [PMID: 16596537 DOI: 10.1177/112972980400500107] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Angioaccess-induced ischemia is an infrequent but cumbersome problem, because both limb ischemia correction and access salvage should be undertaken during the same procedure. This paper reports two cases that we successfully managed with a bridge graft to a small distal artery after fistula ligation.
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Affiliation(s)
- J L Andrade
- Division of Vascular Surgery, Beneficência Portuguesa Hospital of São Paulo, Brazil
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8
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Fernandes-Cardoso A, Santos-Furtado M, Grindler J, Ferreira LA, Andrade JL, Santo MA. Epicardial fat thickness correlates with P-wave duration, left atrial size and decreased left ventricular systolic function in morbid obesity. Nutr Metab Cardiovasc Dis 2017; 27:731-738. [PMID: 28739186 DOI: 10.1016/j.numecd.2017.05.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 05/20/2017] [Accepted: 05/22/2017] [Indexed: 01/30/2023]
Abstract
BACKGROUND AND AIM Epicardial fat (EF) is increased in obesity and has important interactions with atrial and ventricular myocardium. Most of the evidence in this scenario can be confused by the presence of comorbidities such as hypertension, diabetes and dyslipidemia, which are very common in this population. The influence of EF on atrial remodeling and cardiac function demands further investigation on morbidly obese without these comorbidities. METHODS AND RESULTS We prospectively recruited 20 metabolically healthy morbidly obese and 20 normo-weights controls. The maximum P-wave duration (PWD) was analyzed by 12-lead electrocardiogram. Left atrial diameter (LAD), left ventricular ejection fraction (LVEF) and EF thickness (EFT) were evaluated by two-dimensional echocardiography. The mean of maximum PWD and LAD were significantly larger in the obese group as compared to the control group: 109.55 ± 11.52 ms × 89.38 ± 11.19 ms and 36.12 ± 3.46 mm × 31.45 ± 2.64 mm, (p < 0.0001). The mean LVEF was lower in the obese group: 63.15 ± 4.25% × 66.17 ± 3.37% (p < 0.017). The mean EFT was higher in the obese group: 7.72 ± 1.60 mm × 3.10 ± 0.85 mm (p < 0.0001). A positive correlation was found between EFT and PWD (r = 0.70; p = 0.001) and LAD (r = 0.667; p = 0.001). An inverse correlation was found between EFT and LVEF (r = -0.523; p = 0.001). In a multiple multivariate regression analysis the EFT remains correlated with LAD and LVEF. CONCLUSIONS In a select group of morbidly obese, the excess of EF had a significant impact on atrial remodeling and cardiac function.
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MESH Headings
- Adipose Tissue/diagnostic imaging
- Adipose Tissue/physiopathology
- Adiposity
- Adult
- Arrhythmias, Cardiac/diagnosis
- Arrhythmias, Cardiac/etiology
- Arrhythmias, Cardiac/physiopathology
- Atrial Function, Left
- Atrial Remodeling
- Cross-Sectional Studies
- Echocardiography
- Electrocardiography
- Female
- Heart Atria/diagnostic imaging
- Heart Atria/physiopathology
- Humans
- Linear Models
- Male
- Middle Aged
- Multivariate Analysis
- Obesity, Metabolically Benign/complications
- Obesity, Metabolically Benign/diagnosis
- Obesity, Metabolically Benign/physiopathology
- Obesity, Morbid/complications
- Obesity, Morbid/diagnosis
- Obesity, Morbid/physiopathology
- Pericardium/diagnostic imaging
- Pericardium/physiopathology
- Predictive Value of Tests
- Prospective Studies
- Risk Factors
- Stroke Volume
- Systole
- Ventricular Dysfunction, Left/diagnosis
- Ventricular Dysfunction, Left/etiology
- Ventricular Dysfunction, Left/physiopathology
- Ventricular Function, Left
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Affiliation(s)
- A Fernandes-Cardoso
- Electrocardiology Service, Medical Clinic Department, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), Brazil.
| | - M Santos-Furtado
- Echocardiography Laboratory, Radiology Institute (InRad), HCFMUSP, Brazil
| | - J Grindler
- Electrocardiology Service, Medical Clinic Department, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo (HCFMUSP), Brazil
| | - L A Ferreira
- Institute of Mathematics and Statistics, Department of Statistics, IMEUSP, Brazil
| | - J L Andrade
- Echocardiography Laboratory, Radiology Institute (InRad), HCFMUSP, Brazil
| | - M A Santo
- Bariatric Surgery Unit, Gastroenterology Department, HCFMUSP, Brazil
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9
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de la Rosa-Manzano E, Andrade JL, García-Mendoza E, Zotz G, Reyes-García C. Photoprotection related to xanthophyll cycle pigments in epiphytic orchids acclimated at different light microenvironments in two tropical dry forests of the Yucatan Peninsula, Mexico. Planta 2015; 242:1425-1438. [PMID: 26303983 DOI: 10.1007/s00425-015-2383-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2015] [Accepted: 07/14/2015] [Indexed: 06/04/2023]
Abstract
Epiphytic orchids from dry forests of Yucatán show considerable photoprotective plasticity during the dry season, which depends on leaf morphology and host tree deciduousness. Nocturnal retention of antheraxanthin and zeaxanthin was detected for the first time in epiphytic orchids. In tropical dry forests, epiphytes experience dramatic changes in light intensity: photosynthetic photon flux density may be up to an order of magnitude higher in the dry season compared to the wet season. To address the seasonal changes of xanthophyll cycle (XC) pigments and photosynthesis that occur throughout the year, leaves of five epiphytic orchid species were studied during the early dry, dry and wet seasons in a deciduous and a semi-deciduous tropical forests at two vertical strata on the host trees (3.5 and 1.5 m height). Differences in XC pigment concentrations and photosynthesis (maximum quantum efficiency of photosystem II; F v/F m) were larger among seasons than between vertical strata in both forests. Antheraxanthin and zeaxanthin retention reflected the stressful conditions of the epiphytic microhabitat, and it is described here in epiphytes for the first time. During the dry season, both XC pigment concentrations and photosystem II heat dissipation of absorbed energy increased in orchids in the deciduous forest, while F v/F m and nocturnal acidification (ΔH(+)) decreased, clearly as a response to excessive light and drought. Concentrations of XC pigments were higher than those in orchids with similar leaf shape in semi-deciduous forest. There, only Encyclia nematocaulon and Lophiaris oerstedii showed somewhat reduced F v/F m. No changes in ΔH(+) and F v/F m were detected in Cohniella ascendens throughout the year. This species, which commonly grows in forests with less open canopies, showed leaf tilting that diminished light interception. Light conditions in the uppermost parts of the canopy probably limit the distribution of epiphytic orchids and the retention of zeaxanthin can help to cope with light and drought stress in these forests during the dry season.
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Affiliation(s)
- Edilia de la Rosa-Manzano
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, A. C., Calle 43 Núm. 130, Colonia Chuburná de Hidalgo, 97200, Mérida, Yucatán, Mexico
- Instituto de Ecología Aplicada, Universidad Autónoma de Tamaulipas, Av. División del Golfo Núm. 356, Colonia Libertad, 87091, Ciudad Victoria, Tamaulipas, Mexico
| | - José Luis Andrade
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, A. C., Calle 43 Núm. 130, Colonia Chuburná de Hidalgo, 97200, Mérida, Yucatán, Mexico.
| | - Ernesto García-Mendoza
- Departamento de Oceanografía Biológica, Centro de Investigación Científica y de Educación Superior de Ensenada, Km. 107 Carretera Tijuana-Ensenada, 22860, Ensenada, Baja California, Mexico
| | - Gerhard Zotz
- Functional Ecology Group, Institute of Biology and Environmental Sciences, University of Oldenburg, Box 2503, 26111, Oldenburg, Germany
| | - Casandra Reyes-García
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, A. C., Calle 43 Núm. 130, Colonia Chuburná de Hidalgo, 97200, Mérida, Yucatán, Mexico
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10
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Leal GN, Silva KF, Lianza AC, Giacomin MF, Andrade JL, Kozu K, Bonfá E, Silva CA. Subclinical left ventricular dysfunction in childhood-onset systemic lupus erythematosus: a two-dimensional speckle-tracking echocardiographic study. Scand J Rheumatol 2015; 45:202-9. [DOI: 10.3109/03009742.2015.1063686] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- GN Leal
- Department of Radiology, Children’s Institute, Hospital das Clínicas, São Paulo University Medical School
| | - KF Silva
- Department of Radiology, Children’s Institute, Hospital das Clínicas, São Paulo University Medical School
| | - AC Lianza
- Department of Radiology, Children’s Institute, Hospital das Clínicas, São Paulo University Medical School
| | - MF Giacomin
- Rheumatology Unit, Children’s Institute, Hospital das Clínicas, Faculty of Medicine, University of São Paulo
| | - JL Andrade
- Institute of Radiology, Hospital das Clínicas, São Paulo University Medical School
| | - K Kozu
- Rheumatology Unit, Children’s Institute, Hospital das Clínicas, Faculty of Medicine, University of São Paulo
| | - E Bonfá
- Department of Rheumatology, Faculty of Medicine, University of São Paulo, São Paulo, Brazil
| | - CA Silva
- Rheumatology Unit, Children’s Institute, Hospital das Clínicas, Faculty of Medicine, University of São Paulo
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11
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Yang X, Cushman JC, Borland AM, Edwards EJ, Wullschleger SD, Tuskan GA, Owen NA, Griffiths H, Smith JAC, De Paoli HC, Weston DJ, Cottingham R, Hartwell J, Davis SC, Silvera K, Ming R, Schlauch K, Abraham P, Stewart JR, Guo HB, Albion R, Ha J, Lim SD, Wone BWM, Yim WC, Garcia T, Mayer JA, Petereit J, Nair SS, Casey E, Hettich RL, Ceusters J, Ranjan P, Palla KJ, Yin H, Reyes-García C, Andrade JL, Freschi L, Beltrán JD, Dever LV, Boxall SF, Waller J, Davies J, Bupphada P, Kadu N, Winter K, Sage RF, Aguilar CN, Schmutz J, Jenkins J, Holtum JAM. A roadmap for research on crassulacean acid metabolism (CAM) to enhance sustainable food and bioenergy production in a hotter, drier world. New Phytol 2015; 207:491-504. [PMID: 26153373 DOI: 10.1111/nph.13393] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Crassulacean acid metabolism (CAM) is a specialized mode of photosynthesis that features nocturnal CO2 uptake, facilitates increased water-use efficiency (WUE), and enables CAM plants to inhabit water-limited environments such as semi-arid deserts or seasonally dry forests. Human population growth and global climate change now present challenges for agricultural production systems to increase food, feed, forage, fiber, and fuel production. One approach to meet these challenges is to increase reliance on CAM crops, such as Agave and Opuntia, for biomass production on semi-arid, abandoned, marginal, or degraded agricultural lands. Major research efforts are now underway to assess the productivity of CAM crop species and to harness the WUE of CAM by engineering this pathway into existing food, feed, and bioenergy crops. An improved understanding of CAM has potential for high returns on research investment. To exploit the potential of CAM crops and CAM bioengineering, it will be necessary to elucidate the evolution, genomic features, and regulatory mechanisms of CAM. Field trials and predictive models will be required to assess the productivity of CAM crops, while new synthetic biology approaches need to be developed for CAM engineering. Infrastructure will be needed for CAM model systems, field trials, mutant collections, and data management.
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Affiliation(s)
- Xiaohan Yang
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6407, USA
| | - John C Cushman
- Department of Biochemistry and Molecular Biology, University of Nevada, MS330, Reno, NV, 89557-0330, USA
| | - Anne M Borland
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6407, USA
- School of Biology, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Erika J Edwards
- Department of Ecology and Evolutionary Biology, Brown University, Box G-W, Providence, RI, 02912, USA
| | - Stan D Wullschleger
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6301, USA
| | - Gerald A Tuskan
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6407, USA
| | - Nick A Owen
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, UK
| | - Howard Griffiths
- Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, UK
| | - J Andrew C Smith
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
| | - Henrique C De Paoli
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6407, USA
| | - David J Weston
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6407, USA
| | - Robert Cottingham
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6407, USA
| | - James Hartwell
- Department of Plant Sciences, Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Sarah C Davis
- Voinovich School of Leadership and Public Affairs and Department of Environmental and Plant Biology, Ohio University, Athens, OH, 45701, USA
| | - Katia Silvera
- Smithsonian Tropical Research Institute, PO Box 0843-03092, Balboa, Ancon, Republic of Panama
| | - Ray Ming
- Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
- FAFU and UIUC-SIB Joint Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Karen Schlauch
- Nevada Center for Bioinformatics, University of Nevada, MS330, Reno, NV, 89557-0330, USA
| | - Paul Abraham
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - J Ryan Stewart
- Department of Plant and Wildlife Sciences, Brigham Young University, 4105 Life Sciences Building, Provo, UT, 84602, USA
| | - Hao-Bo Guo
- Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, Knoxville, TN, 37996, USA
| | - Rebecca Albion
- Department of Biochemistry and Molecular Biology, University of Nevada, MS330, Reno, NV, 89557-0330, USA
| | - Jungmin Ha
- Department of Biochemistry and Molecular Biology, University of Nevada, MS330, Reno, NV, 89557-0330, USA
| | - Sung Don Lim
- Department of Biochemistry and Molecular Biology, University of Nevada, MS330, Reno, NV, 89557-0330, USA
| | - Bernard W M Wone
- Department of Biochemistry and Molecular Biology, University of Nevada, MS330, Reno, NV, 89557-0330, USA
| | - Won Cheol Yim
- Department of Biochemistry and Molecular Biology, University of Nevada, MS330, Reno, NV, 89557-0330, USA
| | - Travis Garcia
- Department of Biochemistry and Molecular Biology, University of Nevada, MS330, Reno, NV, 89557-0330, USA
| | - Jesse A Mayer
- Department of Biochemistry and Molecular Biology, University of Nevada, MS330, Reno, NV, 89557-0330, USA
| | - Juli Petereit
- Nevada Center for Bioinformatics, University of Nevada, MS330, Reno, NV, 89557-0330, USA
| | - Sujithkumar S Nair
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6301, USA
| | - Erin Casey
- School of Biology, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK
| | - Robert L Hettich
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Johan Ceusters
- Department of M²S, Faculty of Engineering Technology, TC Bioengineering Technology, KU Leuven, Campus Geel, Kleinhoefstraat 4, B-2440, Geel, Belgium
| | - Priya Ranjan
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6407, USA
| | - Kaitlin J Palla
- Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831-6407, USA
| | - Hengfu Yin
- Key Laboratory of Forest Genetics and Breeding, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Fuyang, 311400, China
| | - Casandra Reyes-García
- Centro de Investigación Científica de Yucatán, Calle 43 No. 130, Colonia Chuburná de Hidalgo, CP 97200, Mérida, México
| | - José Luis Andrade
- Centro de Investigación Científica de Yucatán, Calle 43 No. 130, Colonia Chuburná de Hidalgo, CP 97200, Mérida, México
| | - Luciano Freschi
- Department of Botany, University of São Paulo, São Paulo, 05508-090, Brazil
| | - Juan D Beltrán
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
| | - Louisa V Dever
- Department of Plant Sciences, Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Susanna F Boxall
- Department of Plant Sciences, Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Jade Waller
- Department of Plant Sciences, Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Jack Davies
- Department of Plant Sciences, Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Phaitun Bupphada
- Department of Plant Sciences, Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Nirja Kadu
- Department of Plant Sciences, Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Klaus Winter
- Smithsonian Tropical Research Institute, PO Box 0843-03092, Balboa, Ancon, Republic of Panama
| | - Rowan F Sage
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, M5S3B2, Canada
| | - Cristobal N Aguilar
- Department of Food Research, School of Chemistry, Universidad Autónoma de Coahuila, Saltillo, México
| | - Jeremy Schmutz
- HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL, 35801, USA
- US Department of Energy Joint Genome Institute, 2800 Mitchell Drive, Walnut Creek, CA, 94598, USA
| | - Jerry Jenkins
- HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL, 35801, USA
| | - Joseph A M Holtum
- College of Marine and Environmental Sciences, James Cook University, Townsville, 4811, QLD, Australia
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12
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Leal GN, Silva KF, França CMP, Lianza AC, Andrade JL, Campos LMA, Bonfá E, Silva CA. Subclinical right ventricle systolic dysfunction in childhood-onset systemic lupus erythematosus: insights from two-dimensional speckle-tracking echocardiography. Lupus 2014; 24:613-20. [DOI: 10.1177/0961203314563135] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 11/15/2014] [Indexed: 01/07/2023]
Abstract
Objective The objective of this article is to evaluate right ventricle strain imaging by two-dimensional speckle-tracking (2DST) in childhood-onset systemic lupus erythematosus (c-SLE). Methods Thirty-five c-SLE patients with no signs or symptoms of heart failure and 33 healthy volunteers were evaluated by standard echocardiogram and 2DST. Conventional parameters included tricuspid annular plane systolic excursion (TAPSE), RV tissue-Doppler-derived Tei index and systolic pulmonary artery pressure. Global peak longitudinal systolic strain (PLSS) and strain rate (PLSSR) of RV were obtained by 2DST. Demographic/clinical features, SLEDAI-2K/SLICC/ACR-DI and treatment were also assessed. Results The median current age was similar in patients and controls (14.75 vs. 14.88 years, p = 0.62). RV PLSS was significantly reduced in c-SLE (−24.5 ± 5.09 vs. −27.62 ± 3.02%, p = 0.003). Similar findings were observed after excluding patients with pulmonary hypertension (−24.62 ± 4.87% vs. −27.62 ± 3.02%, p = 0.0041). RV PLSS was positively correlated with TAPSE ( r = +0.49, p = 0.0027) and negatively correlated with Tei index ( r = −0.34, p = 0.04) in c-SLE. RV PLSSR was not different comparing patients and controls (−0.65 s−1 ± 0.47 vs. −1.87 ± 0.49 s−1, p = 0.07). Further analysis of c-SLE patients revealed higher frequencies of neuropsychiatric manifestations (39% vs. 0%, p = 0.007) and antiphospholipid antibodies (55% vs. 18%, p = 0.035) in those with RV PLSS ≤ −23.7% vs >−23.7%. No differences were evidenced in demographic data, disease activity/damage or treatments ( p > 0.05). Conclusions The present study, using a new and more sensitive technique, revealed subclinical RV systolic dysfunction in c-SLE patients that may have future prognostic implications. The novel association of asymptomatic RV dysfunction with neuropsychiatric manifestations and antiphospholipid antibodies may suggest common physiopathological pathways.
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Affiliation(s)
- G N Leal
- Radiology Unit, Instituto da Criança, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - K F Silva
- Radiology Unit, Instituto da Criança, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - C M P França
- Pediatric Rheumatology Unit, Instituto da Criança, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - A C Lianza
- Radiology Unit, Instituto da Criança, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - J L Andrade
- Department of Radiology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - L M A Campos
- Pediatric Rheumatology Unit, Instituto da Criança, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - E Bonfá
- Department of Rheumatology, Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
| | - C A Silva
- Pediatric Rheumatology Unit, Instituto da Criança, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo, Brazil
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13
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Ricalde MF, Andrade JL, Durán R, Dupuy JM, Simá JL, Us-Santamaría R, Santiago LS. Environmental regulation of carbon isotope composition and crassulacean acid metabolism in three plant communities along a water availability gradient. Oecologia 2010; 164:871-80. [PMID: 20652592 PMCID: PMC2981738 DOI: 10.1007/s00442-010-1724-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2009] [Accepted: 07/04/2010] [Indexed: 10/27/2022]
Abstract
Expression of crassulacean acid metabolism (CAM) is characterized by extreme variability within and between taxa and its sensitivity to environmental variation. In this study, we determined seasonal fluctuations in CAM photosynthesis with measurements of nocturnal tissue acidification and carbon isotopic composition (δ(13)C) of bulk tissue and extracted sugars in three plant communities along a precipitation gradient (500, 700, and 1,000 mm year(-1)) on the Yucatan Peninsula. We also related the degree of CAM to light habitat and relative abundance of species in the three sites. For all species, the greatest tissue acid accumulation occurred during the rainy season. In the 500 mm site, tissue acidification was greater for the species growing at 30% of daily total photon flux density (PFD) than species growing at 80% PFD. Whereas in the two wetter sites, the species growing at 80% total PFD had greater tissue acidification. All species had values of bulk tissue δ(13)C less negative than -20‰, indicating strong CAM activity. The bulk tissue δ(13)C values in plants from the 500 mm site were 2‰ less negative than in plants from the wetter sites, and the only species growing in the three communities, Acanthocereus tetragonus (Cactaceae), showed a significant negative relationship between both bulk tissue and sugar δ(13)C values and annual rainfall, consistent with greater CO(2) assimilation through the CAM pathway with decreasing water availability. Overall, variation in the use of CAM photosynthesis was related to water and light availability and CAM appeared to be more ecologically important in the tropical dry forests than in the coastal dune.
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Affiliation(s)
- M. Fernanda Ricalde
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, A. C., Calle 43 # 130, Col. Chuburná de Hidalgo, 97200 Mérida, Yucatán Mexico
| | - José Luis Andrade
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, A. C., Calle 43 # 130, Col. Chuburná de Hidalgo, 97200 Mérida, Yucatán Mexico
| | - Rafael Durán
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, A. C., Calle 43 # 130, Col. Chuburná de Hidalgo, 97200 Mérida, Yucatán Mexico
| | - Juan Manuel Dupuy
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, A. C., Calle 43 # 130, Col. Chuburná de Hidalgo, 97200 Mérida, Yucatán Mexico
| | - J. Luis Simá
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, A. C., Calle 43 # 130, Col. Chuburná de Hidalgo, 97200 Mérida, Yucatán Mexico
| | - Roberth Us-Santamaría
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, A. C., Calle 43 # 130, Col. Chuburná de Hidalgo, 97200 Mérida, Yucatán Mexico
| | - Louis S. Santiago
- Department of Botany and Plant Sciences, University of California, 2150 Batchelor Hall, Riverside, CA 92521 USA
- Facility for Isotope Ratio Mass Spectrometry (FIRMS), Center for Conservation Biology, University of California, Riverside, CA 92521 USA
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González-Salvatierra C, Luis Andrade J, Escalante-Erosa F, García-Sosa K, Manuel Peña-Rodríguez L. Antioxidant content in two CAM bromeliad species as a response to seasonal light changes in a tropical dry deciduous forest. J Plant Physiol 2010; 167:792-799. [PMID: 20097444 DOI: 10.1016/j.jplph.2010.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2009] [Revised: 01/06/2010] [Accepted: 01/06/2010] [Indexed: 05/28/2023]
Abstract
Plants have evolved photoprotective mechanisms to limit photodamage; one of these mechanisms involves the biosynthesis of antioxidant metabolites to neutralize reactive oxygen species generated when plants are exposed to excess light. However, it is known that exposure of plants to conditions of extreme water stress and high light intensity results in their enhanced susceptibility to over-excitation of photosystem II and to photooxidative stress. In this investigation we used the 2,2-diphenyl-1-picrylhydrazyl reduction assay to conduct a broad survey of the effect of water availability and light exposure conditions on the antioxidant activity of the leaf extracts of two bromeliad species showing crassulacean acid metabolism. One of these was an epiphyte, Tillandsia brachycaulos, and the other a terrestrial species, Bromelia karatas. Both species were found growing wild in the tropical dry deciduous forest of Dzibilchaltún National Park, México. The microenvironment of T. brachycaulos and B. karatas experiences significant diurnal and seasonal light variations as well as changes in temperature and water availability. The results obtained showed that, for both bromeliads, increases in antioxidant activity occurred during the dry season, as a consequence of water stress and higher light conditions. Additionally, in T. brachycaulos there was a clear correlation between high light intensity conditions and the content of anthocyanins which accumulated below the leaf epidermis. This result suggests that the role of these pigments is as photoprotective screens in the leaves. The red coloration below the leaf epidermis of B. karatas was not due to anthocyanins but to other unidentified pigments.
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Affiliation(s)
- Claudia González-Salvatierra
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, Calle 43 No. 130, Col. Chuburná, Mérida, Yucatán 97200, México
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15
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Affiliation(s)
| | - José Luis Andrade
- Unidad de Recursos Naturales, Centro de Investigación Científica de Yucatán, Mérida, Yucatán, México
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16
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Cervera JC, Andrade JL, Graham EA, Durán R, Jackson PC, Simá JL. Photosynthesis and Optimal Light Microhabitats for a Rare Cactus, Mammillaria gaumeri, in Two Tropical Ecosystems. Biotropica 2007. [DOI: 10.1111/j.1744-7429.2007.00311.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Vieira MLC, Grinberg M, Pomerantzeff PMA, Andrade JL, Mansur AJ. Repeated echocardiographic examinations of patients with suspected infective endocarditis. Heart 2004; 90:1020-4. [PMID: 15310690 PMCID: PMC1768449 DOI: 10.1136/hrt.2003.025585] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
OBJECTIVE To study the diagnostic contribution of repeated transthoracic (TTE) and transoesophageal echocardiography (TOE) among patients with suspected infective endocarditis. METHODS 262 patients with 266 episodes of suspected infective endocarditis were referred for TTE and TOE over three years in a 423 bed university cardiology hospital. Patients were a mean (SD) of 47.6 (17.9) years old. 139 (52.3%) episodes occurred in men and 127 (47.7%) in women. The diagnostic information obtained from repeated TTE and TOE examinations was evaluated relative to the diagnosis of endocarditis. RESULTS TTE examinations were repeated in 192 (72.2%) and TOE examinations were repeated in 49 (18.4%) of 266 episodes. A mean of 2.4 TTE and 1.2 TOE examinations were performed for each episode of suspected endocarditis. The second and third TTEs added diagnostic information in 34 (26.7%) and the second and third TOEs added diagnostic information in 25 (19.7%) of 127 episodes with definite endocarditis. After the third TTE or TOE no additional diagnostic information was obtained. CONCLUSIONS The diagnostic contribution of repeated TTE or TOE for the diagnosis of endocarditis decreased as the number of repetitions increased. In this setting, the data do not substantiate more than three TTE or TOE examinations as an efficient strategy to increase the diagnostic yield for all but selected patients with suspected endocarditis.
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Affiliation(s)
- M L C Vieira
- Heart Institute (InCor), University of São Paulo Medical School, Brazil.
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18
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Abstract
This article describes the culture of epithelial cells from anterior and posterior midgut regions of adult Dendroctonus valens. Culture conditions were established, and cell adherence was improved by means of a new technique that allowed the cells to grow between two glass coverslips. Cytoplasmic projections occur as anterior midgut cells grow to confluence; these projections were not observed in cells of the posterior midgut. The optimal culture medium for the maintenance of these epithelial cells was Roswell Park Memorial Institute 1640 medium at 25 degrees C. Cells in Grace's medium died in 24 h. Cultures did not require CO(2) atmosphere, but culture development was favored by the microaerophilic environment and the dark conditions in which the cells were grown, between the coverslips.
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Affiliation(s)
- L Sánchez
- Departamento de Zoología, Escuela Nacional de Ciencias Biológicas-IPN, Prol. de Carpio y Plan de Ayala s/n, C.P. 11340, México D.F., México
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19
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Andrade JL, Schlaad SW, Koury Junior A, Van Bellen B. Prevalence of lower limb occlusive vascular disease in outclinic diabetic patients. INT ANGIOL 2004; 23:134-8. [PMID: 15507890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
AIM The aim of this study was to determine the prevalence and risk factors for peripheral occlusive vascular disease (POVD) in subjects with diabetes mellitus (DM) in Brazil. METHODS We evaluated 236 diabetic individuals, in spontaneous demand, representing 471 legs. POVD was assessed by the ankle brachial index (ABI). RESULTS The mean age was 62.1 years (range 22-89 years), 52% were male, 93.2% type II DM and the mean time to diagnosis was 7.9 years (range 0-37 years). Sixty percent were hypertensives. In 61% at least one pulse was diminished or absent. The prevalence of ischemia was 18% (ABI<0.9) while 22% had an ABI compatible with high grade arterial calcification (ABI>1.3). Overall less than 1/3 of the cases had the vascular exam that could be considered normal. The ABI was lower in subjects with pulse deficit (p<0.001), and a normal pulse had a negative predictive value for ischemia of more than 90%. Subjects with normal pulses were younger and had a decreased diabetes duration (p<0.001 and p<0.05, respectively). An increase in the duration of the diabetes was associated with a progressive decrease in the ABI (p<0.01). Female gender and hypertension were associated with a reduced ABI (p<0.01 and p<0.05, respectively). CONCLUSION There is a high prevalence of POVD in diabetic individuals. The disease is associated with hypertension and female gender and gets worse with increasing duration of the diabetes.
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Affiliation(s)
- J L Andrade
- Division of Vascular Surgery, Beneficência Portuguesa Hospital, São Paulo, Brazil
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20
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Dourado PMM, Tsutsui JM, Mathias W, Andrade JL, da Luz PL, Chagas ACP. Evaluation of stunned and infarcted canine myocardium by real time myocardial contrast echocardiography. Braz J Med Biol Res 2003; 36:1501-9. [PMID: 14576906 DOI: 10.1590/s0100-879x2003001100009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Differentiation between stunned and infarcted myocardium in the setting of acute ischemia is challenging. Real time myocardial contrast echocardiography allows the simultaneous assessment of myocardial perfusion and function. In the present study we evaluated infarcted and stunned myocardium in an experimental model using real time myocardial contrast echocardiography. Sixteen dogs underwent 180 min of coronary occlusion followed by reperfusion (infarct model) and seven other dogs were submitted to 20 min of coronary occlusion followed by reperfusion (stunned model). Wall motion abnormality and perfusional myocardial defect areas were measured by planimetry. Risk and infarct areas were determined by tissue staining. In the infarct model, the wall motion abnormality area during coronary occlusion (5.52 1.14 cm(2) ) was larger than the perfusional myocardial defect area (3.71 1.45 cm (2); P < 0.001). Reperfusion resulted in maintenance of wall motion abnormality (5.45 1.41 cm (2); P = 0.43 versus occlusion) and reduction of perfusional myocardial defect (1.51 1.29 cm (2); P = 0.004 versus occlusion). Infarct size determined by contrast echocardiography correlated with tissue staining (r = 0.71; P = 0.002). In the stunned model, the wall motion abnormality area was 5.49 0.68 cm (2) during occlusion and remained 5.1 0.63 cm (2) after reperfusion (P = 0.07). Perfusional defect area was 2.43 0.79 cm (2) during occlusion and was reduced to 0.2 0.53 cm(2) after reperfusion (P = 0.04). 2,3,5-Triphenyl tetrazolium chloride staining confirmed the absence of necrotic myocardium in all dogs in the stunned model. Real time myocardial contrast echocardiography is a noninvasive technique capable of distinguishing between stunned and infarcted myocardium after acute ischemia.
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Affiliation(s)
- P M M Dourado
- Instituto do Coraço, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brasil.
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21
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Abstract
Tropical moist forests are notable for their richness in tree species. The presence of such a diverse tree flora presents potential problems for scaling up estimates of water use from individual trees to entire stands and for drawing generalizations about physiological regulation of water use in tropical trees. We measured sapwood area or sap flow, or both, in 27 co-occurring canopy species in a Panamanian forest to determine the extent to which relationships between tree size, sapwood area and sap flow were species-specific, or whether they were constrained by universal functional relationships between tree size, conducting xylem area, and water use. For the 24 species in which active xylem area was estimated over a range of size classes, diameter at breast height (DBH) accounted for 98% of the variation in sapwood area and 67% of the variation in sapwood depth when data for all species were combined. The DBH alone also accounted for > or = 90% of the variation in both maximum and total daily sap flux density in the outermost 2 cm of sapwood for all species taken together. Maximum sap flux density measured near the base of the tree occurred at about 1,400 h in the largest trees and 1,130 h in the smallest trees studied, and DBH accounted for 93% of the variation in the time of day at which maximum sap flow occurred. The shared relationship between tree size and time of maximum sap flow at the base of the tree suggests that a common relationship between diurnal stem water storage capacity and tree size existed. These results are consistent with a recent hypothesis that allometric scaling of plant vascular systems, and therefore water use, is universal.
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Affiliation(s)
- F C Meinzer
- Hawaii Agriculture Research Center, Aiea 96701, USA
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22
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Moisés VA, Ferreira RL, Nozawa E, Kanashiro RM, Campos O, Andrade JL, Carvalho AC, Tucci PJ. Structural and functional characteristics of rat hearts with and without myocardial infarct. Initial experience with Doppler echocardiography. Arq Bras Cardiol 2000; 75:125-36. [PMID: 10983029 DOI: 10.1590/s0066-782x2000000800005] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVE To assess by Doppler echocardiography the structural and functional alterations of rat heart with surgical induced extensive myocardial infarction. METHODS Five weeks after surgical ligature of the left coronary artery, 38 Wistar-EPM rats of both sexes, 10 of them with extensive infarction, undergone anatomical and functional evaluation by Doppler echocardiography and then euthanized for anatomopathological analysis. RESULTS Echocardiography was 100% sensible and specific to anatomopathological confirmed extensive miocardial infarction. Extensive infarction lead to dilatation of left ventricle (diastolic diameter: 0.89 cm vs.0.64 cm; systolic: 0. 72 cm vs. 0.33 cm) and left atrium (0.55 cm vs. 0.33 cm); thinning of left ventricular anterior wall (systolic: 0.14 cm vs. 0.23 cm, diastolic: 0.11 cm vs. 0.14 cm); increased mitral E/ A wave relation (6.45 vs. 1.95). Signals of increased end diastolic ventricle pressure, B point in mitral valve tracing in 62.5% and signs of pulmonary hypertension straightening of pulmonary valve (90%) and notching of pulmonary systolic flow (60%) were observed in animals with extensive infarction. CONCLUSION Doppler echocardiography has a high sensitivity and specificity for detection of chronic extensive infarction. Extensive infarction caused dilatation of left cardiac chambers and showed in Doppler signals of increased end diastolic left ventricular pressure and pulmonary artery pressure.
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Affiliation(s)
- V A Moisés
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, 04023-900, Brazil
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23
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Rivera IR, Gomes L, Moisés VA, Silva CC, Andrade JL, Carvalho AC. Multiple arterial anomalies in the newborn infant. Echocardiographic and angiographic diagnosis. Arq Bras Cardiol 2000; 75:137-44. [PMID: 10983030 DOI: 10.1590/s0066-782x2000000800006] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Multiple arterial anomalies characterized by tortuosity and rolling of the pulmonary arteries and aorta were diagnosed on echocardiography in an asymptomatic newborn infant with a phenotype suggesting Ehlers-Danlos syndrome. These changes were later confirmed on angiography, which also showed peripheral vascular abnormalities. The electrocardiogram showed a probable hemiblock of the left anterosuperior branch, and the chest x-ray showed an excavated pulmonary trunk with normal pulmonary flow.
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Affiliation(s)
- I R Rivera
- Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil
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Rivera IR, Moises VA, Silva CC, Andrade JL, Carvalho AC. Association of pulmonary atresia with intact ventricular septum and aortic valve stenosis. Prenatal diagnosis. Arq Bras Cardiol 2000; 74:447-52. [PMID: 10951836 DOI: 10.1590/s0066-782x2000000500006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
A rare association of pulmonary atresia with an intact septum was diagnosed through echocardiography in a fetus 32 weeks of gestational age. The diagnosis was later confirmed by echocardiography of the newborn infant and further on autopsy. The aortic valve was bicuspid with a pressure gradient of 81 mmHg, and the right ventricle was hypoplastic, as were the pulmonary trunk and arteries, and the blood flow was totally dependent on the ductus arteriosus.
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Affiliation(s)
- I R Rivera
- Universidade Federal de São Paulo-Escola Paulista de Medicine, Brazil
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25
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Hilário MO, Andrade JL, Gasparian AB, Carvalho AC, Andrade CT, Len CA. The value of echocardiography in the diagnosis and followup of rheumatic carditis in children and adolescents: a 2 year prospective study. J Rheumatol 2000; 27:1082-6. [PMID: 10782841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
OBJECTIVE To evaluate echocardiographic/Doppler findings in patients with rheumatic fever whether or not clinical manifestations of carditis were present, and the followup of these findings 24 months after the acute phase. METHODS Twenty-two patients with rheumatic fever (13 boys, 9 girls, mean age 11.0 years) were evaluated at baseline (at diagnosis) and after 3 and 6 mo of disease. Eighteen patients were reevaluated 24 mo later. The assessment included physical and cardiac examination, electrocardiogram, chest radiography, and color ECHO/Doppler performed blindly by different investigators. The control group included 15 healthy children. RESULTS We observed clinical carditis in 8 patients (36.4%): Group 1, all with ECHO abnormalities. We observed no clinical cardiac manifestations in 14 patients (Group 2), but 5 (35.7%) had positive ECHO/Doppler abnormalities that persisted at least 6 mo in followup assessments. Mitral and aortic were the most frequently involved valves. In Group 1 we observed normalization of the ECHO/Doppler in 3 patients, improvement in 2, no change in 2, and worsening in one. Twelve of 14 patients without clinical carditis were reevaluated, including the 5 patients with ECHO/Doppler abnormalities during the initial evaluations; normalization or improvement was observed in 2 patients, no change in 2, and worsening in one. We observed no ECHO/Doppler abnormalities in the control group. CONCLUSION This blind prospective study suggests the existence of asymptomatic carditis in some patients with rheumatic fever and the role ECHO/Doppler investigation could play in diagnosis and followup.
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Affiliation(s)
- M O Hilário
- Department of Pediatrics, Universidade Federal de São Paulo, Brazil.
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26
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Rivera IR, Moises VA, Tebexreni AS, Silva CC, Andrade JL, Campos Filho O, Carvalho AC. Right coronary artery fistula with congestive heart failure in the neonate. Doppler echocardiographic diagnosis and closure with detachable balloon. Arq Bras Cardiol 2000; 74:243-52. [PMID: 10951827 DOI: 10.1590/s0066-782x2000000300006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We report here a case of coronary artery fistula in a neonate with clinical signs of heart failure. The electrocardiogram showed signs of left ventricular hypertrophy and diffuse alterations in ventricular repolarization. Chest X-ray showed an enlargement of the cardiac silhouette with an increase in pulmonary flow. After echocardiographic diagnosis and angiographic confirmation, closure of the fistulous trajectory was performed with a detachable balloon with an early and late successful outcome.
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Affiliation(s)
- I R Rivera
- Universidade Federal de São Paulo-Escola Paulista de Medicina, Brazil
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27
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Mathias W, Arruda A, Santos FC, Arruda AL, Mattos E, Osório A, Campos O, Gil M, Andrade JL, Carvalho AC. Safety of dobutamine-atropine stress echocardiography: A prospective experience of 4,033 consecutive studies. J Am Soc Echocardiogr 1999; 12:785-91. [PMID: 10511646 DOI: 10.1016/s0894-7317(99)70182-3] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Dobutamine-atropine stress echocardiography (DASE) is an established method and has been shown to be accurate for the detection of coronary artery disease. Still, there are few large clinical studies that analyze the safety of DASE in general or the safety of performing it on an ambulatory basis. Most studies use a target heart rate as the primary end point regardless of whether asymptomatic ischemia occurs. Such studies have shown a serious cardiac event rate of approximately 0.3%. We prospectively studied 4,033 consecutive patients on an ambulatory basis and in the hospital with the use of DASE from July 1991 to December 1998. All tests were performed by an experienced physician, and all clinical and DASE data were stored in a large database organized at the beginning of the study. Dobutamine was infused in scalar doses of 5, 10, 20, 30, and 40 microg/kg per minute in 3-minute stages. Development of a new wall motion abnormality, achievement of 85% of target heart, and end of the DASE infusion protocol were used as an end point. If 85% of the target heart rate was not achieved, atropine was infused up to 1 mg in the absence of myocardial ischemia, which was used in 1,280 studies. There were 3,645 diagnostic tests, and 388 (10%) were found to be nondiagnostic. This result was due to poor image quality in 115 (3%), end of protocol in negative-submaximal examinations in 124 (3%), and limiting side effects in 149 (4%). Thirty-seven percent of the tests showed positive results for myocardial ischemia. Major test-related cardiac complications occurred in 10 (0.25%) patients and included 1 ventricular fibrillation, 1 case of myocardial infarction, and 8 cases of sustained ventricular tachycardia. Atropine poisoning was observed in 5 (0.12%) patients. No deaths occurred as a direct or indirect consequence of DASE. We conclude that dobutamine-atropine stress echocardiography is a reasonably safe method for detection of coronary artery disease in the hospital or in an ambulatory basis. The use of new wall motion abnormality as 1 of the end points may prevent further ischemia-related complications.
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Affiliation(s)
- W Mathias
- Echocardiography Laboratories of Paulista School of Medicine (UNIFESP) and Exata Diagnostics, São Paulo, Brazil.
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28
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Clearwater MJ, Meinzer FC, Andrade JL, Goldstein G, Holbrook NM. Potential errors in measurement of nonuniform sap flow using heat dissipation probes. Tree Physiol 1999; 19:681-687. [PMID: 12651324 DOI: 10.1093/treephys/19.10.681] [Citation(s) in RCA: 111] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The empirical calibration of Granier-type heat dissipation sap flow probes that relate temperature difference (DeltaT) to sap velocity (v) was reevaluated in stems of three tropical tree species. The original calibration was confirmed when the entire heated probe was in contact with conducting xylem, but mean v was underestimated when part of the probe was in contact with nonconducting xylem or bark. Analysis of the effects of nonuniform sap velocity profiles on heat dissipation estimates showed that errors increased as v and the proportion of the probe in nonconducting wood increased. If half of a 20-mm probe is in sapwood with a v of 0.15 mm s(-1) and the other half is in nonconducting wood, then mean v for the whole probe can be underestimated by as much as 50%. A correction was developed that can be used if the proportion of the probe in nonconducting wood is known. Even with the entire heated probe in contact with conducting xylem, v would be underestimated when radial velocity gradients are present. In this case, the error would be smaller except when velocity gradients are very steep, as can occur in species with ring-porous wood anatomy. Errors occur because the relationship between DeltaT and v is nonlinear. Mean DeltaT along the probe is therefore not a measure of mean v, and users of heat dissipation probes should not assume that v is integrated along the length of the probe. The same type of error can occur when DeltaT is averaged through time while v is changing, but the error is small unless there are sudden, step changes between zero and high sap velocity. It is recommended that relatively short probes (20 mm or less) be used and that probes longer than the depth of conducting sapwood be avoided. Multiple probes inserted to a range of depths should be used in situations where steep gradients in v are expected. If these conditions are met, heat dissipation probes remain useful and widely applicable for measuring sap flow in woody stems.
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Affiliation(s)
- Michael J. Clearwater
- Hawaii Agriculture Research Center, 99-193 Aiea Heights Drive, Suite 300, Aiea, HI 96701, USA
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Abstract
Considering that nitric oxide (NO) may be involved in anti-tumoral and anti-parasite lectin effects, in this report we investigated whether lectin induces NO production. Lectins from Canavalia brasiliensis, Dioclea grandiflora, Pisum arvense (PAA), and concanavalin A induced murine peritoneal cells to produce NO in vitro. PAA induced similar levels to that obtained with lipopolysaccharide plus interferon-gamma. NO production by adherent cells was significantly lower than that of unfractionated cells, suggesting a combination of lectin stimuli directly on macrophages and via lymphocyte stimulation. Ex vivo experiments showed that cells stimulated in vivo could maintain NO production in vitro without further stimuli. NO synthesis blockage in vivo can significantly increase cell numbers in draining lymph nodes after lectin injection compared to unblocked controls, suggesting an in vivo association of lectin stimuli and NO production. Taken together these data show that lectins can induce NO production both in vitro and in vivo.
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Affiliation(s)
- J L Andrade
- Laboratório de Imuno-regulação e Microbiologia (LIMI) Centro de Pesquisas Gonçalo Moniz, Fundação Oswaldo Cruz (FIOCRUZ), Bahia, 40.295-001 SSA, Brazil
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Meinzer FC, Andrade JL, Goldstein G, Holbrook NM, Cavelier J, Wright SJ. Partitioning of soil water among canopy trees in a seasonally dry tropical forest. Oecologia 1999; 121:293-301. [PMID: 28308316 DOI: 10.1007/s004420050931] [Citation(s) in RCA: 222] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Little is known about partitioning of soil water resources in species-rich, seasonally dry tropical forests. We assessed spatial and temporal patterns of soil water utilization in several canopy tree species on Barro Colorado Island, Panama, during the 1997 dry season. Stable hydrogen isotope composition (δD) of xylem and soil water, soil volumetric water content (θv), and sap flow were measured concurrently. Evaporative fractionation near the soil surface caused soil water δD to decrease from about -15‰ at 0.1 m to -50 to -55‰ at 1.2 m depth. Groundwater sampled at the sources of nearby springs during this period yielded an average δD value of -60‰. θv increased sharply and nearly linearly with depth to 0.7 m, then increased more slowly between 0.7 and 1.05 m. Based on xylem δD values, water uptake in some individual plants appeared to be restricted largely to the upper 20 cm of the soil profile where θv dropped below 20% during the dry season. In contrast, other individuals appeared to have access to water at depths greater than 1 m where θv remained above 45% throughout the dry season. The depths of water sources for trees with intermediate xylem δD values were less certain because variation in soil water δD between 20 and 70 cm was relatively small. Xylem water δD was also strongly dependent on tree size (diameter at breast height), with smaller trees appearing to preferentially tap deeper sources of soil water than larger trees. This relationship appeared to be species independent. Trees able to exploit progressively deeper sources of soil water during the dry season, as indicated by increasingly negative xylem δD values, were also able to maintain constant or even increase rates of water use. Seasonal courses of water use and soil water partitioning were associated with leaf phenology. Species with the smallest seasonal variability in leaf fall were also able to tap increasingly deep sources of soil water as the dry season progressed. Comparison of xylem, soil, and groundwater δD values thus pointed to spatial and temporal partitioning of water resources among several tropical forest canopy tree species during the dry season.
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Affiliation(s)
- F C Meinzer
- Hawaii Agriculture Research Center, 99-193 Aiea Heights Drive, Suite 300 Aiea, HI 96701 USA e-mail: Tel.: +1-808-4865357 Fax: +1-808-4865020, , , , , , US
| | - José Luis Andrade
- Hawaii Agriculture Research Center, 99-193 Aiea Heights Drive, Suite 300 Aiea, HI 96701 USA e-mail: Tel.: +1-808-4865357 Fax: +1-808-4865020, , , , , , US
| | - Guillermo Goldstein
- Department of Botany, University of Hawaii, 3190 Maile Way, Honolulu, HI 96822, USA, , , , , , US
| | - N Michele Holbrook
- Biological Laboratories, Harvard University, Cambridge, MA 02138, USA, , , , , , US
| | - Jaime Cavelier
- Departamento de Ciencias Biológicas, Universidad de los Andes, Bogotá, Colombia, , , , , , CO
| | - S Joseph Wright
- Smithsonian Tropical Research Institute, Apartado 2072, Balboa, Ancón, Republic of Panamá, , , ,
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Moisés VA, Mesquita CB, Campos O, Andrade JL, Bocanegra J, Andrade JC, Buffolo E, Carvalho AC. Importance of intraoperative transesophageal echocardiography during coronary artery surgery without cardiopulmonary bypass. J Am Soc Echocardiogr 1998; 11:1139-44. [PMID: 9923994 DOI: 10.1016/s0894-7317(98)80009-6] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The goal of this study was to assess left ventricular segmental wall motion (SWM) abnormalities during coronary artery bypass grafting (CABG) without cardiopulmonary bypass (CPB), and its impact on the immediate postoperative outcome. Transesophageal echocardiography was used intraoperatively in 27 patients (mean age 57 years) who had CABG without CPB. Images obtained with a 5-MHz biplane transesophageal echocardiographic probe in the transgastric and transesophageal planes were recorded before, during, and after 48 coronary artery clampings for saphenous vein or internal mammary artery anastomosis. Transthoracic echocardiography was performed 1 day before surgery and on the seventh postoperative day. During the 48 coronary artery clampings, 31 (64%) new SWM abnormalities were found. At the time of chest closure, complete recovery occurred in 16 (50%) segments, partial recovery in 10 (33%), and no recovery in 5 (17%). On the seventh postoperative day the new SWM abnormalities persisted in all 5 segments without recovery at the end of the surgery and in 2 of 10 (20%)segments with partial recovery (group 1). Group 1 had higher variation on the echocardiographic point score index between the beginning and end of surgery, higher enzymatic levels, more ST-T changes on the electrocardiogram, and more clinical problems than group 2 (patients without new SWM abnormalities on the seventh postoperative day) (P < .05). We concluded that new SWM abnormalities of the left ventricle occur during CABG without CPB as assessed by intraoperative transesophageal echocardiography. Persistence of these abnormalities at the end of surgery may be a predictor of SWM dysfunction and clinical problems in the immediate postoperative period.
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Affiliation(s)
- V A Moisés
- Division of Cardiology, Universidade Federal de São Paulo, Escola Paulista de Medicina, Brazil
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Rivera IR, Moises VA, Silva CC, Abujamra P, Andrade JL, Carvalho AC. [Right ventricle-dependent coronary circulation in pulmonary atresia with intact ventricular septum. Absence of origin of the coronary arteries from the aorta]. Arq Bras Cardiol 1998; 71:143-6. [PMID: 9816688 DOI: 10.1590/s0066-782x1998000800010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
This report describes the clinical, echocardiographic and angiographic aspects of a five-day old boy with pulmonary atresia and intact ventricular septum. Both the echocardiogram and the aortography did not show any coronary arteries arising from the aorta. Two-dimensional echocardiography was able to identify the coronary arteries originating from the right ventricle and so did the right ventricular angiogram. No retrograde flow into the aorta or pulmonary trunk was identified after opacification of the coronary arteries. As far as we know this is the first case diagnosed by echocardiography, and is a vivid example of the necessity of identifying the coronary arteries in patients with pulmonary atresia and intact ventricular septum.
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Rivera IR, Moisés VA, Silva CC, Leal SB, Maluf MA, Andrade JL, Carvalho AC. [Anomalous origin of the right pulmonary artery from the ascending aorta (Hemitruncus)]. Arq Bras Cardiol 1998; 70:341-4. [PMID: 9687640 DOI: 10.1590/s0066-782x1998000500007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The origin of the right pulmonary artery from the ascending aorta is a rare cogenital anomaly, with very few reports in the literature. We describe two cases of this rare malformation, one of them, associated with interruption of the aortic arch (type B). In both cases, the diagnosis was made by two-dimensional echocardiography, with angiographic confirmation in one of them. The origin of the right pulmonary artery was close to the aortic valve, anomaly pathogenetically distinct from the type that arises close to the innominate artery.
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Affiliation(s)
- I R Rivera
- Escola Paulista de Medicina--UNIFESP--São Paulo
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Abstract
The evaluation of left ventricular function with dobutamine stress echocardiography is described for the first time in a patient with anomalous left coronary artery from the pulmonary trunk during the preoperative and postoperative periods. This method demonstrated signs of myocardial ischemia that were not seen on the resting echocardiogram during the preoperative period and ventricular function recovery after surgical intervention.
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Affiliation(s)
- S M Leal
- Pediatric Cardiology Division, Escola Paulista de Medicina, São Paulo, Brazil
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Oliveira Filho JA, Silva AC, Lira Filho E, Luna Filho B, Covre SH, Lauro FA, Danucalov MA, Leite WA, Tuffik S, Andrade JL, de Paola AA, Martinez Filho E. [Athlete's heart in elite disabled athletes]. Arq Bras Cardiol 1997; 69:385-8. [PMID: 9609009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
PURPOSE To assess the prevalence of the athlete's, heart syndrome in elite disabled Brazilians athletes. METHODS Seventy-five athletes, age 27.8 +/- 6.7 years, 56 men, with various disabilities (47 physical, 12 visual and 16 cerebral paralysis) underwent clinical, electrocardiographic, vectorcardiographic, ergometric and echocardiographic evaluations. RESULTS Athlete's heart signs occurred in 33% of the clinical evaluations, in 55% of the electrocardiograms, in 15% of the vectorcardiograms, and in 5% of the echocardiograms. At least one of these signs was presented in 51% of the athletes. There were 2 or more abnormalities in 46% of the athletes and 4 or more signs in 12%. Exercise test was considered not ischemic in 77% of the subjects. There was right bundle branch block in 23% of the tests. CONCLUSION There were two or more athlete's heart syndrome signs in 46% of Brazilian disabled athletes.
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Arruda A, Campos Filho O, Ribeiro E, Petrizzo A, Andrade JL, Carvalho AC, Buffolo E, Martinez E, Mathias Júnior W. [Assessment of left internal thoracic artery anastomosis with left anterior descending coronary artery by Doppler echocardiography]. Arq Bras Cardiol 1997; 69:413-9. [PMID: 9609014 DOI: 10.1590/s0066-782x1997001200009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
PURPOSE To study the value of Doppler echocardiography as a tool for the evaluation of left internal thoracic artery graft (LITAG) patency in patients who underwent coronary revascularization using minimally invasive bypass surgery without extracorporeal circulation. METHODS The first 12 consecutive patients were studied after coronary artery bypass surgery using a 5 MHz Doppler transducer. Doppler signals for the systolic and diastolic flow velocities were preferably obtained in the second intercostal space. All patients underwent coronary angiography while hospitalized. RESULTS The exam was feasible in 93% of patients. Doppler flow pattern was predominantly diastolic (pattern A) in patients with patent anastomoses (6/7). In patients with occluded anastomoses (4/4) Doppler flow pattern was predominantly systolic (pattern B) (p = 0.003). CONCLUSION Internal thoracic artery flow pattern as measured by Doppler echocardiography after minimally invasive coronary artery bypass graft surgery is an accurate method for identifying LITAG patency.
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Affiliation(s)
- A Arruda
- Escola Paulista de Medicina-UNIFESP
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Abstract
We describe a seven year old girl with echocardiographic diagnosis of pulmonary artery endarteritis as a complication of a patent ductus arteriosus, confirmed at surgery. This case illustrates the necessity of complete surgical resection of the infectious source as a way to avoid other complications such as pulmonary embolism.
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Affiliation(s)
- I R Rivera
- Escola Paulista de Medicina, UNIFESP, São Paulo
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38
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Mathias Júnior W, Stella U, Baruta F, Cordovil A, Andrade JL, Carvalho AC, Ribeiro E, Duprat R, Martinez E. [Prognostic value of stress echocardiography by dobutamine combined with atropine]. Arq Bras Cardiol 1997; 69:95-9. [PMID: 9567331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
PURPOSE To determine the prognostic value of dobutamine-atropine stress echocardiography (DASE). METHODS We studied 452 consecutive patients at high risk for coronary artery disease, using DASE. They were followed during a mean period of 23 months. RESULTS There were 9 cardiac deaths and 2 acute myocardial infarctions in the group of patients with positive tests, and there were 2 myocardial infarctions and 1 cardiac death in patients with negative DASE. CONCLUSION We conclude that DASE reliably identifies patients at high risk for hard cardiac events.
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Affiliation(s)
- W Mathias Júnior
- Escola Paulista de Medicina-UNIFESP e Hospital Unicor, São Paulo
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39
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Mathias Júnior W, Stella U, Baruta F, Cordovil A, Andrade JL, Carvalho AC, Ribeiro E, Duprat R, Martinez E. [Prognostic value of stress echocardiography by dobutamine combined with atropine]. Arq Bras Cardiol 1997. [PMID: 9567331 DOI: 10.1590/s0066-782x1997000800004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
PURPOSE To determine the prognostic value of dobutamine-atropine stress echocardiography (DASE). METHODS We studied 452 consecutive patients at high risk for coronary artery disease, using DASE. They were followed during a mean period of 23 months. RESULTS There were 9 cardiac deaths and 2 acute myocardial infarctions in the group of patients with positive tests, and there were 2 myocardial infarctions and 1 cardiac death in patients with negative DASE. CONCLUSION We conclude that DASE reliably identifies patients at high risk for hard cardiac events.
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Affiliation(s)
- W Mathias Júnior
- Escola Paulista de Medicina-UNIFESP e Hospital Unicor, São Paulo
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40
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Mathias Júnior W, Beneti LP, dos Santos FC, Duprat R, Beraldo A, Gil MA, Andrade JL, Martinez E. [Safety and feasibility of dobutamine-atropine stress echocardiography]. Arq Bras Cardiol 1997; 69:31-4. [PMID: 9532813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
PURPOSE To study the safety and feasibility of dobutamine-atropine stress echocardiography (DASE) in patients with known or suspected coronary artery disease. METHODS There were 3,000 DASE that were studied in a prospective fashion. All symptoms and side effects were stored in a data base format. RESULTS Major test-related complications observed included one case of myocardial infarction, four cases of sustained ventricular tachycardia and five cases of atropine intoxication. There was no death or ventricular fibrillation as a direct or indirect consequence of the test. The infusion protocol allowed to us to examine patients using beta blockers, and led to 95% feasibility. CONCLUSION DASE is a safe and feasible method for the study of patients with suspected or known coronary artery disease.
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41
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Mathias Júnior W, Arruda AM, Benevides H, Duprat R, Andrade JL, Campos Filho O, Martinez E, Silva LA, Ribeiro E. [Diagnostic accuracy of dobutamine-atropine stress echocardiography]. Arq Bras Cardiol 1997; 68:407-13. [PMID: 9515247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
PURPOSE To analyze the diagnostic accuracy of dobutamine-atropine stress echocardiography. METHODS We studied 304 consecutive patients using dobutamine-atropine stress echocardiography who underwent coronary angiography within a month of the exam. Patients received high dobutamine doses associated or not with atropine. RESULTS The global sensitivity was 92%, specificity was 72% and diagnostic accuracy was 87%. Analyzing 120 patients with normal LV function, we found sensitivity of 85%, specificity of 79% and accuracy of 82%. CONCLUSION Dobutamine-atropine stress echocardiography is an accurate method for the detection of coronary artery disease.
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42
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Romero-Rivera I, Andrade JL, Silva CC, Andrade JC, Carvalho AC. [Partial atrioventricular septal defect associated with right atrioventricular valve Ebstein's disease]. Arq Bras Cardiol 1997; 68:367-71. [PMID: 9497527 DOI: pmid/9497527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The association of Ebstein's disease and atrioventricular septal defect is extremely rare with only 13 cases described in the literature and none in our country. We described a 15 year-old girl with echo and angiographic diagnosis confirmed by surgery. The non-identification of one of the lesions could impair planning and surgical results.
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43
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Morais PV, Mesquita C, Andrade JL, da Costa MS. Investigation of persistent colonization by Pseudomonas aeruginosa-like strains in a spring water bottling plant. Appl Environ Microbiol 1997; 63:851-6. [PMID: 9055406 PMCID: PMC168380 DOI: 10.1128/aem.63.3.851-856.1997] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Ninety-seven strains, producing a fluorescent pigment under UV light and/or a green diffusive pigment on cetrimide-naladixic acid agar, were isolated from a spring water bottling plant. These strains were presumptively identified as Pseudomonas aeruginosa, but they could not be confirmed as strains of this species nor identified by the API 20NE identification system. The isolates and reference strains were clustered by computer-assisted whole-cell protein sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The numerical analysis of the protein electrophoregrams resulted in the formation of four clusters at a similarity level of 80% and two unclustered type strains. One cluster included strains isolated during a 4-month period and reference strains of several biotypes of P. fluorescens. The remaining isolates formed another cluster with a very high similarity of level, which included two groups of strains based on biochemical characterization by the API 20NE Test System. Strains were typed by random amplified polymorphic DNA (RAPD)-PCR and two different RAPD patterns were obtained, corresponding to each biochemical profile. This persistent colonization seems to be caused by a single species present in the bottling system, with two clonal origins, not related to P. aeruginosa or to any of the other type strains tested. Partial 16S rDNA sequence of a representative strain of one cluster of isolates had a level of similarity of 99.3% with P. alcaligenes. This study shows that characteristics similar to P. aeruginosa on cetrimide-naladixic acid agar can be exhibited by several groups of fluorescent pseudomonads that do not belong to this species, clearly showing that confirmation tests must be performed before a decision regarding the water quality is made.
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Affiliation(s)
- P V Morais
- Departamento de Bioquímica, Universidade de Coimbra, Portugal.
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44
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Lima CT, Martinez E, Franken RA, Jacob JL, Oliveira WA, Ortiz J, Morcef FA, Machado FS, Del Castillo JM, Andrade JL. [Consensus SOCESP-SBC on echocardiography]. Arq Bras Cardiol 1995; 65:459-68. [PMID: 8729867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
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45
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Atik E, Barbero-Marcial M, Andrade JL, Baucia JA, Iwahashi E, Aiello V, Ebaid M. [Clinical manifestation of aortopulmonary window as mitral regurgitation caused by secondary dilatation of the valvar anulus]. Arq Bras Cardiol 1994; 63:493-5. [PMID: 7605235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Two patients with huge aortopulmonary window, both ten months-old, that showed curiously up at a clinical viewpoint, including echocardiography, as a mitral valve regurgitation with a dilated mitral ring secondary to the accentuated blood volume through it, were reported. Early signs of heart failure, accentuated systolic murmur at mitral area and overload of left heart cavities, characterized clinical impression of a congenital mitral insufficiency, in both cases. The correct diagnosis was established at operation and at necropsy study, bringing it to us the need to a more accurate analysis of the different diagnostic elements, especially in anomalies which clinical manifestations show great similarities.
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Affiliation(s)
- E Atik
- Instituto do Coração do Hospital das Clínicas, FMUSP e Hospital Sírio Libanês
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46
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Campos O, Andrade JL, Bocanegra J, Ambrose JA, Carvalho AC, Harada K, Martinez EE. Physiologic multivalvular regurgitation during pregnancy: a longitudinal Doppler echocardiographic study. Int J Cardiol 1993; 40:265-72. [PMID: 8225661 DOI: 10.1016/0167-5273(93)90010-e] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Valvular function, assessed by Doppler technique, has not been extensively investigated during normal pregnancy. To prospectively study this feature, 18 normal pregnant women were followed during their pregnancies and puerperium, with serial clinical and pulsed-continuous Doppler echocardiographic examinations. In four gestational periods and the puerperium, we analysed: (a) ventricular and atrial dimensions, as well as valve annular diameters; (b) prevalence and characteristics of trivial valvular regurgitations. During pregnancy, slight but significant increases of the four cardiac chamber dimensions and valve annular diameters were observed, except for the aortic ring. The prevalence of physiologic valvular regurgitation in early pregnancy (mitral, 0%; tricuspid, 38.9%; pulmonary, 22.2%; aortic, 0%), was similar to a control group of 18 healthy non-pregnant women. As pregnancy evolved, there was a progressive and significant increase of multivalvular regurgitation, maximal at full-term (mitral, 27.8%; tricuspid, 94.4%; pulmonary, 94.4%, P < 0.05 vs. early pregnancy). Aortic regurgitation was not detected in any stage of pregnancy. In the puerperium, mitral regurgitation resolved, but tricuspid and pulmonary regurgitation were still significantly prevalent (83.3% and 66.7%, respectively, P < 0.05 vs. early pregnancy). It is concluded that physiologic multivalvular regurgitation is frequent in pregnancy, mainly involving right-sided valves in late gestational periods, occasionally persisting in the early puerperium. Chamber enlargement, valve annular dilatation, and increased prevalence of trivial valve regurgitation are time-related events during normal pregnancy, resulting from a reversible cardiac remodeling process induced by physiologic volume overload. These aspects should be considered for a correct interpretation of Doppler echocardiographic findings in pregnant women with suspected heart disease.
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Affiliation(s)
- O Campos
- Division of Cardiology, Escola Paulista de Medicina, Sao Paulo, Brazil
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47
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Andrade JL, Leal SM, Campos Filho O, Carvalho AC, Tebexreni AS, Lima VC. Contrast echocardiography during cardiac catheterization in patients with congenital heart diseases. Cathet Cardiovasc Diagn 1993; 29:117-21. [PMID: 8348595 DOI: 10.1002/ccd.1810290206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Contrast echocardiography performed during cardiac catheterization has mostly been limited to a few published case reports. We studied 37 patients with congenital heart disease to assess the capability of the method to diagnose cardiac shunts and valve regurgitation. Injections of 5% dextrose in water through an angiographic catheter were made to evaluate septal integrity and valve competence compared with conventional contrast angiography. An overall sensitivity of 93% and specificity of 78% were found. In four cases of atrial septal defect and seven of mitral regurgitation, the sensitivity was 100%. It was slightly lower for eleven cases of ventricular septal defect (91%) and four of patent ductus arteriosus (75%). When assessing aortic, tricuspid and pulmonary valve competence, the method proved to be more sensitive than conventional angiography to detect mild regurgitation. Contrast echocardiography is a sensitive and safe technique that may be used in association with conventional angiography reducing the need for radiographic contrast and ionizing radiation time.
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Affiliation(s)
- J L Andrade
- Pediatric Cardiology Division, Escola Paulista de Medicina, São Paulo, Brasil
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48
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Moisés VA, Vieira Filho JP, Andrade JL, Leão LE, Martinez Filho EE. [Submitral left ventricular aneurysm in a Brazilian Indian]. Arq Bras Cardiol 1993; 60:343-5. [PMID: 8311752] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Subvalvar left ventricular aneurysm is a rare disease of unknown etiology, that has been described most often in black Africans. A case of Brazilian indian with heart failure and a murmur of mitral regurgitation is reported. The chest x-ray showed a mild bulge in the left cardiac border and two-dimensional echocardiography demonstrated submitral left ventricular aneurysm, confirmed by left ventricular angiography. Surgical treatment consisted of resection of the aneurysm and mitral valvuloplasty. A perforation of the aneurysm, undetected neither by two-dimensional echocardiography nor by angiography was found at surgery.
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Campos Filho O, Andrade JL, Carvalho AC, Luna Filho B, Pfeferman A, Arroyo JB, Leão LE, Martínez Filho EE. [Assessment of pulmonary arterial pressure in adults with Doppler echocardiography]. Rev Port Cardiol 1993; 12:241-7. [PMID: 8512716 DOI: pmid/8512716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
PURPOSE To assess the role of pulsed Doppler echocardiography (PDE) in the indirect assessment of pulmonary artery (PA) pressure (P), analysing the pulmonary velocity blood flow curves (PVBFC) profile. PATIENTS AND METHODS Sixty-one adults with several kinds of heart disease were submitted to heart catheterization to obtain PAP (systolic, diastolic, mean), and other hemodynamic variables. A PDE examination was performed in all to obtain the PVBFC at the level of the pulmonic annulus. Qualitative features of the curve were analysed (morphological pattern, presence of pulmonic regurgitation) as well as quantitative data (acceleration time = AT, right ventricle ejection time = RVET index, AT/RVET index AT corrected for heart rate = ATC), which were compared to the invasive measurements. RESULTS An abnormal rapid acceleration of the PVBFC, with triangular configuration, was noted in patient with pulmonary hypertension (PH), in contrast to the dome-like shape of the PVBFC in normal PAP. Pulmonary regurgitation was more frequent (p < 0.05) in patients with severe PH (mean PAP > or = 40 mmHg), comparing with patients with PAP < 40 mmHg. Inverse linear correlations were observed between AT and mean PAP, particularly when sinus rhythm was present (r = 0.89; p < 0.05) excluding patients with atrial fibrillation (19 cases). CONCLUSION PDE is an useful and noninvasive method for indirect evaluation of PAP in adults, especially during stable sinus rhythm, in heart rate range from 60 to 115 bpm.
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Martinez EE, Barros TL, Santos DV, Carvalho AC, de Paola AA, Andrade JL, Angellini J, Lima VC, Roberti RR, Portugal OP. Cardiopulmonary exercise testing early after catheter-balloon mitral valvuloplasty in patients with mitral stenosis. Int J Cardiol 1992; 37:7-13. [PMID: 1428291 DOI: 10.1016/0167-5273(92)90126-n] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Seven female patients (age 27 to 53 yr) with significant mitral stenosis performed continuous, incremental, maximal treadmill exercise tests the day before and within 3-5 days after catheter-balloon valvuloplasty. Mitral valve area determined by the echo-Doppler method increased from 0.9 +/- 0.3 cm2 to 1.9 +/- 0.7 cm2 (p < 0.02). Mean left atrial pressure was reduced from 24 +/- 8 to 13 +/- 7 mmHg (p < 0.01) and mean pulmonary artery pressure from 36 +/- 13 to 28 +/- 10 mmHg (p < 0.02) with a non-significant increase in cardiac output from 3.6 +/- 1.2 to 4.0 +/- 1.7 l/min. After catheter-balloon valvuloplasty all patients reached a higher maximal workload during exercise, and mean value of oxygen consumption and pulmonary ventilation were significantly lower in submaximal workloads. The calculated ventilatory equivalent for oxygen was significantly reduced in submaximal and in maximal workloads after catheter-balloon valvuloplasty. Peak oxygen consumption and the ventilatory anaerobic threshold were not changed after catheter-balloon valvuloplasty (pre 15.59 +/- 2.72 vs post 16.90 +/- 3.44 and pre 12.10 +/- 2.55 vs post 12.62 +/- 2.71 ml/kg/min, respectively). We concluded that after catheter-balloon valvuloplasty the cost of breathing was reduced and the oxygen consumed was more effectively utilized during exercise. Increases in peak oxygen consumption and in ventilatory anaerobic threshold would require circulatory and metabolic adaptations in response to increased physical activity and were not observed when cardiopulmonary tests were performed early after catheter-balloon valvuloplasty.
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Affiliation(s)
- E E Martinez
- Division of Cardiology, Escola Paulista de Medicina, Sao Paulo, Brazil
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