37 research outputs found
Exercise-induced left septal fascicular block: an expression of severe myocardial ischemia
The electrocardiogram (ECG) criteria for the left septal fascicular block (LSFB) are not universally accepted and many other denominations can be seen in literature: focal septal block, septal focal block, left septal fascicular block, left anterior septal block, septal fascicular conduction disorder of the left branch, left septal Purkinje network block, left septal subdivision block of the left bundle branch, anterior conduction delay, left median hemiblock, left medial subdivision block of the left bundle branch, middle fascicle block, block of the anteromedial division of the left bundle branch of His, and anteromedial divisional block. During exercise stress test, fascicular blocks (left anterior and posterior) seem to indicate severe coronary artery narrowing of left main coronary or proximal left anterior descending artery disease1 and transient exercise-induced left septal fascicular block has been reported a few times2,3.
54-year-old male, with a history of essential arterial systemic hypertension, primary hyperlipidemia and six-month typical chest pain during exercise (Class II â Canadian Cardiovascular Society) underwent an exercise stress test. During the exercise stress test, ECG demonstrated abrupt prominent anterior forces, an increase in R wave amplitude from V1 to V4, extreme left axis deviation and minor ST segment depression in DII, DIII and aVF (Figure 1). The post-exercise period showed progressive return of the QRS axis in both frontal and horizontal planes and the ST depression worsened by 1 mm. Coronary angiogram (Figure 2A) showed a critical proximal left anterior descending artery lesion. An exercise stress test done three months after coronary artery bypass surgery grafting was normal (Figure 2B)
The genetic diversity of wild rescuegrass is associated with precipitation levels
The genus Bromus belongs to the family Poaceae, contains 3 over 160 annual and perennial species of grasses [...]Fil: Cuyeu, Romina. Instituto Nacional de TecnologĂa Agropecuaria. Centro Nacional de Investigaciones Agropecuarias. Centro de InvestigaciĂłn de Ciencias Veterinarias y AgronĂłmicas. Instituto de GenĂ©tica; ArgentinaFil: Pagano, Elba Maria. Instituto Nacional de TecnologĂa Agropecuaria. Centro Nacional de Investigaciones Agropecuarias. Centro de InvestigaciĂłn de Ciencias Veterinarias y AgronĂłmicas. Instituto de GenĂ©tica; ArgentinaFil: Rosso, Beatriz Elena. Instituto Nacional de TecnologĂa Agropecuaria; ArgentinaFil: Soto, Gabriela Cynthia. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Instituto de Investigaciones en IngenierĂa GenĂ©tica y BiologĂa Molecular; ArgentinaFil: Ayub, Nicolas Daniel. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentina. Instituto Nacional de TecnologĂa Agropecuaria. Centro Nacional de Investigaciones Agropecuarias. Centro de InvestigaciĂłn de Ciencias Veterinarias y AgronĂłmicas. Instituto de GenĂ©tica; Argentin
Genetic diversity in a world germplasm collection of tall fescue
Festuca arundinacea Schreb., commonly known as tall fescue, is a major forage crop in temperate regions. Recently, a molecular analysis of different accessions of a world germplasm collection of tall fescue has demonstrated that it contains different species from the genus Festuca and allowed their rapid classification into the three major morphotypes (Continental, Mediterranean and Rhizomatous). In this study, we explored the genetic diversity of 161 accessions of Festuca species from 29 countries, including 28 accessions of INTA (Argentina), by analyzing 15 polymorphic SSR markers by capillary electrophoresis. These molecular markers allowed us to detect a total of 214 alleles. The number of alleles per locus varied between 5 and 24, and the values of polymorphic information content ranged from 0.627 to 0.840. In addition, the accessions analyzed by flow cytometry showed different ploidy levels (diploid, tetraploid, hexaploid and octaploid), placing in evidence that the world germplasm collection consisted of multiple species, as previously suggested. Interestingly, almost all accessions of INTA germplasm collection were true hexaploid tall fescue, belonging to two eco-geographic races (Continental and Mediterranean). Finally, the data presented revealed an ample genetic diversity of tall fescue showing the importance of preserving the INTA collection for future breeding programsFil: Cuyeu, Alba Romina. Instituto Nacional de TecnologĂa Agropecuaria (INTA). Instituto de GenĂ©tica "Ewald A. Favret"; ArgentinaFil: Rosso, Beatriz Susana. Instituto Nacional de TecnologĂa Agropecuaria (INTA). EstaciĂłn Experimental Agropecuaria Pergamino; ArgentinaFil: Pagano, Elba Maria. Instituto Nacional de TecnologĂa Agropecuaria (INTA). Instituto de GenĂ©tica "Ewald A. Favret"; ArgentinaFil: Soto, Gabriela. Instituto Nacional de TecnologĂa Agropecuaria (INTA). Instituto de GenĂ©tica "Ewald A. Favret"; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Fox, Ana Romina. Instituto Nacional de TecnologĂa Agropecuaria (INTA). Instituto de GenĂ©tica "Ewald A. Favret"; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Ayub, NicolĂĄs Daniel. Instituto Nacional de TecnologĂa Agropecuaria (INTA). Instituto de GenĂ©tica "Ewald A. Favret"; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentin
Genetic diversity in a world germplasm collection of tall fescue
Festuca arundinacea Schreb., commonly known as tall fescue, is a major forage crop in temperate regions. Recently, a molecular analysis of different accessions of a world germplasm collection of tall fescue has demonstrated that it contains different species from the genus Festuca and allowed their rapid classification into the three major morphotypes (Continental, Mediterranean and Rhizomatous). In this study, we explored the genetic diversity of 161 accessions of Festuca species from 29 countries, including 28 accessions of INTA (Argentina), by analyzing 15 polymorphic SSR markers by capillary electrophoresis. These molecular markers allowed us to detect a total of 214 alleles. The number of alleles per locus varied between 5 and 24, and the values of polymorphic information content ranged from 0.627 to 0.840. In addition, the accessions analyzed by flow cytometry showed different ploidy levels (diploid, tetraploid, hexaploid and octaploid), placing in evidence that the world germplasm collection consisted of multiple species, as previously suggested. Interestingly, almost all accessions of INTA germplasm collection were true hexaploid tall fescue, belonging to two eco-geographic races (Continental and Mediterranean). Finally, the data presented revealed an ample genetic diversity of tall fescue showing the importance of preserving the INTA collection for future breeding programs.Fil: Cuyeu, Romina. Instituto Nacional de TecnologĂa Agropecuaria. Centro Nacional de Investigaciones Agropecuarias. Centro de InvestigaciĂłn de Ciencias Veterinarias y AgronĂłmicas. Instituto de GenĂ©tica; ArgentinaFil: Rosso, Beatriz Elena. Instituto Nacional de TecnologĂa Agropecuaria. Centro Regional Buenos Aires Norte. EstaciĂłn Experimental Agropecuaria Pergamino; ArgentinaFil: Pagano, Elba Maria. Instituto Nacional de TecnologĂa Agropecuaria. Centro Nacional de Investigaciones Agropecuarias. Centro de InvestigaciĂłn de Ciencias Veterinarias y AgronĂłmicas. Instituto de GenĂ©tica; ArgentinaFil: Soto, Gabriela Cynthia. Instituto Nacional de TecnologĂa Agropecuaria. Centro Nacional de Investigaciones Agropecuarias. Centro de InvestigaciĂłn de Ciencias Veterinarias y AgronĂłmicas. Instituto de GenĂ©tica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Fox, Ana Romina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Instituto de Investigaciones en IngenierĂa GenĂ©tica y BiologĂa Molecular; ArgentinaFil: Ayub, Nicolas Daniel. Instituto Nacional de TecnologĂa Agropecuaria. Centro Nacional de Investigaciones Agropecuarias. Centro de InvestigaciĂłn de Ciencias Veterinarias y AgronĂłmicas. Instituto de GenĂ©tica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentin
Escore eletrocardiogrĂĄfico: aplicação em ergometria para avaliação do precondicionamento isquĂȘmico
Compendio de patologĂa tiroidea
La glĂĄndula tiroides constituye un foco de atenciĂłn permanente para los profesionales de la salud, y sus patologĂas cuentan entre las mĂĄs frecuentes del ser humano, acompañåndolo desde antes del nacimiento y hasta la mĂĄs avanzada edad. Esto lleva a que, desde todas las disciplinas mĂ©dicas, en algĂșn momento, se dirija la mirada hacia este pequeño Ăłrgano, y a que sea ademĂĄs un permanente material de investigaciĂłn cientĂfica. De mĂĄs estĂĄ decir, entonces, que es un contenido omnipresente en el arsenal de conocimientos mĂ©dicos, y componente ineludible en la currĂcula de la enseñanza de la Medicina. Con esta convicciĂłn, los docentes del Instituto de PatologĂa de la Tiroides, de la Facultad de Ciencias MĂ©dicas de la Universidad Nacional de Cuyo, desde años atrĂĄs, pretenden confeccionar un texto que sintetice actualizadamente los conocimientos al respecto.
Se presenta ahora la quinta edición, un modesto aporte, dirigido con prioridad a los estudiantes de la Carrera de Medicina de la Facultad. Se identifica que han sido de interés y utilidad en ediciones anteriores para médicos generalistas y de distintas especialidades.
Es mantenido el objetivo inicial de presentar con la mayor brevedad posible los conceptos bĂĄsicos, y no esforzarse por incorporar los mĂĄs modernos, en particular los referidos a los recursos diagnĂłsticos y terapĂ©uticos, sin dejar de lado los aportes en la investigaciĂłn de la fisiopatologĂa de los diversos trastornos que nos interesan, como tampoco la experiencia recogida en los mĂĄs de cincuenta años de existencia del Instituto.Fil: Ayub, Elsa. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Berbejo Moroni, Armando. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Borremans, Carlos G.. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Brisoli, Jorge L.. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Burgos, Beatriz. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Glatstsein, Telma B. . Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Herrera, Javier. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Mesa, Rolando. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Mir, Carlos. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Misteli, Ivonne. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Notti, Alberto. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Pusiol, Eduardo. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Sherbovsky, LucĂa. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas.Fil: Zuluaga, Pedro. Universidad Nacional de Cuyo. Facultad de Ciencias MĂ©dicas
Outcomes from elective colorectal cancer surgery during the SARS-CoV-2 pandemic
This study aimed to describe the change in surgical practice and the impact of SARS-CoV-2 on mortality after surgical resection of colorectal cancer during the initial phases of the SARS-CoV-2 pandemic
The polyhydroxyalkanoate genes of a stress resistant Antarctic Pseudomonas are situated within a genomic island
Pseudomonas sp. 14-3 is an Antarctic bacterium that shows high stress resistance in association with high polyhydroxybutyrate (PHB) production. In this paper genes involved in PHB biosynthesis (phaRBAC) were found within a genomic island named pha-GI. Numerous mobile elements or proteins associated with them, such as an integrase, insertion sequences, a bacterial group II intron, a complete Type I protein secretion system and IncP plasmid-related proteins were detected among the 28 ORFs identified in this large genetic element (32.3 kb). The G + C distribution was not homogeneous, likely reflecting a mosaic structure that contains regions from diverse origins. pha-GI has strong similarities with genomic islands found in diverse Proteobacteria, including Burkholderiales species and Azotobacter vinelandii. The G + C content, phylogeny inference and codon usage analysis showed that the phaBAC cluster itself has a complex mosaic structure and indicated that the phaB and phaC genes were acquired by horizontal transfer, probably derived from Burkholderiales. These results describe for the first time a pha cluster located within a genomic island, and suggest that horizontal transfer of pha genes is a mechanism of adaptability to stress conditions such as those found in the extreme Antarctic environment.Fil: Ayub, NicolĂĄs Daniel. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de QuĂmica BiolĂłgica de la Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de QuĂmica BiolĂłgica de la Facultad de Ciencias Exactas y Naturales; ArgentinaFil: Pettinari, MarĂa Julia. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de QuĂmica BiolĂłgica de la Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de QuĂmica BiolĂłgica de la Facultad de Ciencias Exactas y Naturales; ArgentinaFil: Mendez, Beatriz Silvia. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de QuĂmica BiolĂłgica de la Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de QuĂmica BiolĂłgica de la Facultad de Ciencias Exactas y Naturales; ArgentinaFil: LĂłpez, Nancy Irene. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas. Oficina de CoordinaciĂłn Administrativa Ciudad Universitaria. Instituto de QuĂmica BiolĂłgica de la Facultad de Ciencias Exactas y Naturales. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de QuĂmica BiolĂłgica de la Facultad de Ciencias Exactas y Naturales; Argentin
Impaired polyhydroxybutyrate biosynthesis from glucose in Pseudomonas sp. 14-3 is due to a defective ÎČ-ketothiolase gene
Pseudomonas sp. 14-3 accumulates polyhydroxybutyrate (PHB) from octanoate, but not from glucose. To elucidate this unusual phenotype, genes responsible for the synthesis of PHB were cloned and analyzed. A PHB polymerase gene (phaC) was found downstream from genes coding for a ÎČ-ketothiolase (phaA), an acetoacetyl-coenzyme A reductase (phaB) and a putative transcriptional regulator (phaR). All genes were similar to pha genes from several related species, but differences were observed in the distal region of phaA. Complementation with heterologous ÎČ-ketothiolase genes from Azotobacter sp. FA8 or Pseudomonas putida GPp104 restored the capability of Pseudomonas sp. 14-3 to synthesize PHB from glucose, demonstrating that its ÎČ-ketothiolase was nonfunctional. Analysis of the genome sequences of other Pseudomonas species has revealed the existence of putative ÎČ-ketothiolase genes. The functionality of one of these thiolase genes, belonging to P. putida GPp104, was experimentally demonstrated. Pseudomonas sp. 14-3 is the first natural phaA mutant described, that despite this mutation accumulates high amounts of PHB when growing on fatty acids.Fil: Ayub, NicolĂĄs Daniel. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de QuĂmica BiolĂłgica; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Pettinari, MarĂa Julia. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de QuĂmica BiolĂłgica; ArgentinaFil: Mendez, Beatriz Silvia. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de QuĂmica BiolĂłgica; ArgentinaFil: LĂłpez, Nancy Irene. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de QuĂmica BiolĂłgica; Argentin