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Katch L, Yeoh WY, Touzanov O, Pacheco M, Lan B, Arguelles AP. Shear Wave Ultrasound Inspection of Flaws in Silicon Wafers Using Focused Transducers. IEEE Trans Ultrason Ferroelectr Freq Control 2023; 70:1506-1515. [PMID: 37782587 DOI: 10.1109/tuffc.2023.3321254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Silicon parts can contain micrometer-sized vertical cracks that are challenging to detect. Inspection using high-frequency focused ultrasound has shown promise for detecting defects of this size and geometry. However, implementing focused ultrasound to inspect anisotropic media can prove challenging, given the directional dependence of wave propagation and subsequent focusing behavior. In this work, back surface-breaking defects at various orientations within silicon wafers (0°, 15°, and 45° relative to the [010] crystallographic axis) are experimentally inspected in an immersion tank setup. Using 100 MHz unfocused and focused shear waves, the impact of medium anisotropy on focusing and defect detection is evaluated. The scattering amplitude and defect detection sensitivity results demonstrate orientation-dependent patterns that strongly rely on the use of focused transducers. The defects along the 45° orientation reveal two-lobe scattering patterns with maximum amplitudes less than half that of the defects in the 0° orientation, which in contrast show a one-lobe scattering pattern. The experimental results are further explored using finite element (FE) modeling and ray tracing to visualize the impact of focusing on wave propagation within the silicon. Ray tracing results show that the focused beam profiles for the 45° and 0° orientations form a butterfly wing and elliptical focusing profile, respectively, which correspond directly to experimentally found scattering patterns from defects. Additionally, the FE scattering results from unfocused transducers reveal single lobe scattering for both 0° and 45° orientations, proving the varying scattering patterns to be driven by the anisotropic focusing behavior.
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Jackson M, Berry A, Montalvo SK, Dan T, Herring RA, Cederberg K, Sloan T, Pacheco M, Greer C, Kumar KA. Response-Adapted Omission of Radiotherapy in Pediatric Patients with Intermediate- and High-Risk Hodgkin Lymphoma Treated per EuroNet-PHL-C1: A Single Institution Analysis of Outcomes and Patterns of Failure. Int J Radiat Oncol Biol Phys 2023; 117:e521. [PMID: 37785624 DOI: 10.1016/j.ijrobp.2023.06.1790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) EuroNet-PHL-C1 demonstrated that 40% of intermediate- and high-risk pediatric Hodgkin lymphoma (HL) patients treated with OEPA-COPDAC chemotherapy achieved adequate response (AR) at early response assessment (ERA), and thus were able to omit radiotherapy (RT). However, patterns of failure with this treatment paradigm, and specifically, whether or not all initial sites of disease require RT for those with inadequate response (IR) at ERA is unknown. The purpose of our study is to examine outcomes and patterns of failure for those treated per EuroNet-PHL-C1 at our institution. Our hypothesis is that limiting RT to only sites of IR at ERA does not result in increased failures. MATERIALS/METHODS An IRB-approved retrospective review of all intermediate- and high-risk classical HL pediatric patients treated at our institution per EuroNet-PHL-C1 between 2015 and 2021 was performed. Patients were treated per protocol with radiation omitted for those with AR (Deauville 1-2 and >75% tumor shrinkage) at ERA (PET/CDT after 2 cycles of chemo). For those with IR who required RT, only sites of IR (Deauville 3-5) at ERA were treated using involved site radiation treatment (ISRT), instead of all initial sites of disease as on EuroNet-PHL-C1. Outcomes including overall survival (OS) and progression free survival (PFS) were calculated using Kaplan-Meier curves and patterns of failure were classified as either initial site only, new site only, or initial and new sites. RESULTS A total of 35 patients were identified, of which 33 had evaluable follow up with median follow up of 33 months. The median age at diagnosis was 14 (range, 4-18) and 48% were female. Of the 33, 7 (21%) had IR at ERA and thus required RT, while 26 (79%) were spared RT. In the group who received RT, 4/7 (57%) had initial B-symptoms and 4/7 (57%) had initial bulky disease, compared to 9/26 (35%) and 20/26 (77%), respectively, in those who did not receive RT. For our entire cohort, 2-year PFS and OS were 91% and 100%, respectively. For those who had RT, 2-year PFS was 83% compared to 92% in those who did not need RT. There was a total of 3 relapses (9%) at last follow up with 1/7 (14%) in those who had RT vs. 2/26 (8%) in those without RT. For the patient who relapsed after RT, relapse occurred both at initial and new sites. For the 2 who relapsed who did not receive RT, 1 was both in initial and new sites, while the other was initial site only. CONCLUSION At our institution, the majority of patients treated per EuroNet-PHL-C1 avoided RT with excellent outcomes. For those requiring RT, limiting RT to only sites of IR at ERA does not appear to adversely affect outcomes, though analysis is limited by the low number of failures.
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Affiliation(s)
- M Jackson
- UT Southwestern Medical Center, Dallas, TX
| | - A Berry
- UT Southwestern Medical Center, Dallas, TX
| | - S K Montalvo
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX
| | - T Dan
- University of Texas Southwestern Department of Radiation Oncology, Dallas, TX
| | | | | | - T Sloan
- UT Southwestern Medical Center, Dallas, TX
| | - M Pacheco
- St. Luke's Children's Cancer Institute, Boise, ID
| | - C Greer
- UT Southwestern Medical Center, Dallas, TX; Children's Health Dallas, Dallas, TX
| | - K A Kumar
- Department of Radiation Oncology, University of Texas Southwestern Medical Center, Dallas, TX
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Rojas C, León A, Pacheco M, Chico L, Orellana PA. Tuning the conductance of carbon rings with impurities and electric fields. RSC Adv 2023; 13:22358-22366. [PMID: 37497092 PMCID: PMC10366656 DOI: 10.1039/d3ra03297c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/05/2023] [Indexed: 07/28/2023] Open
Abstract
We explore two mechanisms to tune the electronic conductance of carbon atom rings, namely, substitutional impurities and in-plane external electric fields. First-principles calculations and a tight-binding approach are used to model the systems. Two bond configurations are studied, cumulenic and polyynic, which can be relevant depending on the number of carbon atoms in the ring. We find that both impurity substitution and electric field mechanisms allow for modifying the electronic spectrum and transport characteristics. Interestingly, cumulenic and polyynic carbon rings present a different response to these perturbations, which can also be a way to elucidate the bond nature of these structures.
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Affiliation(s)
- Carlos Rojas
- Departamento de Física, Universidad Técnica Federico Santa María Casilla 110 V Valparaíso Chile
| | - A León
- Instituto de Ciencias Básicas, Facultad de Ingeniería, Universidad Diego Portales Avda. Ejército 441 Santiago Chile
| | - M Pacheco
- Departamento de Física, Universidad Técnica Federico Santa María Casilla 110 V Valparaíso Chile
| | - Leonor Chico
- GISC, Departamento de Física de Materiales, Facultad de Ciencias Físicas, Universidad Complutense de Madrid 28040 Madrid Spain
| | - P A Orellana
- Departamento de Física, Universidad Técnica Federico Santa María Casilla 110 V Valparaíso Chile
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Lopez LA, Ochieng J, Pacheco M, Martinez L, Omar HA, Gowda M, Prasanna BM, Dhugga KS, Chaikam V. Effectiveness of R1-nj Anthocyanin Marker in the Identification of In Vivo Induced Maize Haploid Embryos. Plants (Basel) 2023; 12:2314. [PMID: 37375939 DOI: 10.3390/plants12122314] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 06/09/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023]
Abstract
Doubled haploid (DH) technology has become integral to maize breeding programs to expedite inbred line development and increase the efficiency of breeding operations. Unlike many other plant species that use in vitro methods, DH production in maize uses a relatively simple and efficient in vivo haploid induction method. However, it takes two complete crop cycles for DH line generation, one for haploid induction and the other one for chromosome doubling and seed production. Rescuing in vivo induced haploid embryos has the potential to reduce the time for DH line development and improve the efficiency of DH line production. However, the identification of a few haploid embryos (~10%) resulting from an induction cross from the rest of the diploid embryos is a challenge. In this study, we demonstrated that an anthocyanin marker, namely R1-nj, which is integrated into most haploid inducers, can aid in distinguishing haploid and diploid embryos. Further, we tested conditions that enhance R1-nj anthocyanin marker expression in embryos and found that light and sucrose enhance anthocyanin expression, while phosphorous deprivation in the media had no affect. Validating the use of the R1-nj marker for haploid and diploid embryo identification using a gold standard classification based on visual differences among haploids and diploids for characteristics such as seedling vigor, erectness of leaves, tassel fertility, etc., indicated that the R1-nj marker could lead to significantly high false positives, necessitating the use of additional markers for increased accuracy and reliability of haploid embryo identification.
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Affiliation(s)
- Luis Antonio Lopez
- International Maize and Wheat Improvement Center (CIMMYT), Apdo. Postal 6-64106600, Mexico 06600, Mexico
| | - John Ochieng
- International Maize and Wheat Improvement Center (CIMMYT), ICRAF Campus, UN Avenue, Nairobi P.O. Box 1041-00621, Kenya
| | - Mario Pacheco
- International Maize and Wheat Improvement Center (CIMMYT), Apdo. Postal 6-64106600, Mexico 06600, Mexico
| | - Leocadio Martinez
- International Maize and Wheat Improvement Center (CIMMYT), Apdo. Postal 6-64106600, Mexico 06600, Mexico
| | - Hamilton Amoshe Omar
- International Maize and Wheat Improvement Center (CIMMYT), ICRAF Campus, UN Avenue, Nairobi P.O. Box 1041-00621, Kenya
| | - Manje Gowda
- International Maize and Wheat Improvement Center (CIMMYT), ICRAF Campus, UN Avenue, Nairobi P.O. Box 1041-00621, Kenya
| | - Boddupalli M Prasanna
- International Maize and Wheat Improvement Center (CIMMYT), ICRAF Campus, UN Avenue, Nairobi P.O. Box 1041-00621, Kenya
| | - Kanwarpal S Dhugga
- International Maize and Wheat Improvement Center (CIMMYT), Apdo. Postal 6-64106600, Mexico 06600, Mexico
| | - Vijay Chaikam
- International Maize and Wheat Improvement Center (CIMMYT), ICRAF Campus, UN Avenue, Nairobi P.O. Box 1041-00621, Kenya
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Ahmed H, Files M, Saarela K, Morray B, Shivaram G, Greene C, Choi C, Mauchley D, McMullan D, Bohuta L, Hong B, Albers E, Kemna M, Rubio A, Law Y, Reed R, Friedland-Little J, Pacheco M, Hsu E. Initial Experience with a Decision Tree to Assess the Need for Concurrent Liver Transplantat in Fontan Patients Undergoing Heart Transplant. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
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6
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Dikec J, Pacheco M, Lavaud M, Winckler P, Perrier-Cornet JM. Uptake of UVc induced photoproducts of dipicolinic acid by Bacillus subtilis spores - Effects on the germination and UVc resistance of the spores. J Photochem Photobiol B 2022; 236:112569. [PMID: 36152351 DOI: 10.1016/j.jphotobiol.2022.112569] [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: 07/29/2022] [Revised: 09/05/2022] [Accepted: 09/14/2022] [Indexed: 06/16/2023]
Abstract
Dipicolinic acid (DPA) is a specific molecule of bacterial spores which is essential to their resistance to various stresses such as ultraviolet (UV) exposure and to their germination. DPA has a particular photochemistry that remains imperfectly understood. In particular, due to its ability to absorb UVc radiation, it is likely to form in vitro a wide variety of photoproducts (DPAp) of which only about ten have been recently identified. The photochemical reactions resulting in DPAp, especially those inside the spores, are still poorly understood. Only one of these DPAp, which probably acts as a photosensitizer of DNA upon exposure to UVc, has been identified as having an impact on spores. However, as UVc is required to form DPAp, it is difficult to decouple the overall effect of UVc exposure from the possible effects of DPAp alone. In this study, DPAp were artificially introduced into the spores of the FB122 mutant strain of Bacillus subtilis, one that does not produce DPA. These experiments revealed that some DPAp may play a positive role for the spore. These benefits are visible in an improvement in spore germination rate and kinetics, as well as in an increase in their resistance to UVc exposure.
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Affiliation(s)
- J Dikec
- UMR Procédés Alimentaires et Microbiologiques, L'Institut Agro Dijon, Université de Bourgogne Franche-Comté, 1, Esplanade Erasme, 21000 Dijon, France
| | - M Pacheco
- UMR Procédés Alimentaires et Microbiologiques, L'Institut Agro Dijon, Université de Bourgogne Franche-Comté, 1, Esplanade Erasme, 21000 Dijon, France
| | - M Lavaud
- UMR Procédés Alimentaires et Microbiologiques, L'Institut Agro Dijon, Université de Bourgogne Franche-Comté, 1, Esplanade Erasme, 21000 Dijon, France; Dimacell Imaging Facility, L'Institut Agro Dijon, Université de Bourgogne Franche-Comté, 1 Esplanade Erasme, 21000 Dijon, France
| | - P Winckler
- UMR Procédés Alimentaires et Microbiologiques, L'Institut Agro Dijon, Université de Bourgogne Franche-Comté, 1, Esplanade Erasme, 21000 Dijon, France; Dimacell Imaging Facility, L'Institut Agro Dijon, Université de Bourgogne Franche-Comté, 1 Esplanade Erasme, 21000 Dijon, France
| | - J M Perrier-Cornet
- UMR Procédés Alimentaires et Microbiologiques, L'Institut Agro Dijon, Université de Bourgogne Franche-Comté, 1, Esplanade Erasme, 21000 Dijon, France; Dimacell Imaging Facility, L'Institut Agro Dijon, Université de Bourgogne Franche-Comté, 1 Esplanade Erasme, 21000 Dijon, France.
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7
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Barradas M, Duarte F, Coutinho Dos Santos I, Resendes De Oliveira L, Serena C, Xavier Fontes A, Viveiros Monteiro A, Machado C, Dourado R, Santos E, Pelicano N, Pacheco M, Tavares A, Martins D. Physical activity and heart failure: a forgotten indicator. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Low physical activity may be associated with comorbidities, sedentary lifestyle or clinical worsening in heart failure (HF) patients. Cardiovascular implantable electronic devices (CIEDs) detect and analyse physical activity data that is often integrated in multifactorial algorithms for predicting HF decompensations, but its potential is probably underestimated.
Purpose
We hypothesized that low physical-activity levels, obtained from remote monitoring of CIEDs, help predict clinical outcomes in HF patients, independently from multifactorial algorithms.
Methods
We retrospectively evaluated consecutive patients with HF and CIEDs through clinical assessments and remote monitoring (two monitoring systems were used). Low activity was defined as <1 hour/day of physical activity and two groups of patients were defined: patients with low activity alerts (group 1) and patients without low activity alerts (group 2). Primary outcome was defined as death by all causes and secondary outcome as HF hospitalizations and sustained ventricular tachycardia (VT) or ventricular fibrillation (VF) episodes.
Results
From 121 patients with RPM, physical activity data was obtained in 104 (85,9%). Mean age was 63,98±12,44 years, 70,2% were males and follow-up was 59,19±38,491 months. Fifty-four (51,9%) had implantable cardiac resynchronization therapy (CRT) defibrillator (CRT-D), 46 (44,2%) transvenous implantable cardioverter defibrillator (ICD), and 4 (3,8%) CRT pacemaker (CRT-P). The aetiology was idiopathic in 42,5% and ischemic in 40,2%. Mean left ventricular ejection fraction was 34,08±11,40% and mean physical activity duration was 2,25±1,84 hours/day. Forty-eight (53,7%) had low activity alerts (group 1) and 56 (46,3%) had no low activity alerts (group 2). In group 1 mean period of low activity was 52,978±15,75 days/year. Patients from group 1 were older (p=0,001), had more oncological disease (p=0,041) and peripheral artery disease (p=0,028). Three deaths occurred in total, all in group 1 (p=0,039) and HF hospitalizations were more frequent in group 1 (1,68±2,59 vs 0,69±1,32, p=0,005). Low activity burden was also associated with atrial fibrillation burden (r=0,473, p<0,05) and number of episodes of VT or VF (r=0,267, p=0,007). A decrease of 50% or more in mean duration of physical activity, but above 1 hour/day, was associated with increase HF hospitalizations (1,83±2,13 vs 1,05±1,95, p=0,006).
Conclusion
Low physical activity data obtained from CIEDs was associated with HF hospitalizations, arrhythmic events and death by all causes, independently of multifactorial algorithms. A decrease in basal activity even above alert threshold, was associated with HF hospitalizations and may be an even earlier sign of HF decompensations.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- M Barradas
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - F Duarte
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | | | | | - C Serena
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | | | | | - C Machado
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - R Dourado
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - E Santos
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - A Tavares
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - D Martins
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
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8
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Barradas M, Duarte F, Coutinho Dos Santos I, Resendes De Oliveira L, Serena C, Xavier Fontes A, Viveiros Monteiro A, Machado C, Dourado R, Santos E, Pelicano N, Pacheco M, Tavares A, Martins D. Lower rate limit in cardiac resynchronization therapy defibrillators. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
There is few data about programmed lower rate limit (LRL) in real world heart failure (HF) patients with cardiac resynchronization therapy–defibrillators (CRT-Ds) and its influence in clinical outcomes. Heart rate score (HRS) is the percentage of all atrial-paced and sensed events in the single tallest 10 beats/min device histogram bin and may indicate impaired heart rate variability.
Purpose
We hypothesized that higher LRL programming is associated with worse clinical outcomes as arrhythmic events and HF decompensations in chronic HF patients with CRT-Ds.
Methods
LRL was evaluated and HRS was calculated from remote monitoring in 126 HF patients with CRT-D. Primary outcome was defined as HF hospitalizations and related admissions to the emergency department and secondary outcome as number of device therapies, sustained ventricular tachycardia (VT) and ventricular fibrillation (VF).
Results
Mean age was 69,03±10,39 years, 81 (64,3%) were males and mean follow-up was 53,72±46,13 months. Mean left ventricular ejection fraction was 30,31±8,33% and 29 (23,0%) were in NYHA III–IV. HF aetiology was idiopathic in 39 (43,3%), ischemic in 32 (25,4%) and alcoholic cardiomyopathy in 8 (6,3%). Thirty-seven (29,4%) patients had atrial fibrillation and 33 (26,2%) coronary disease. LRL ranged from to 40 to 80 bpm and mean LRL was 52,64±9,64 and mean HRS 49,60±23,17%. Programmed LRL was higher in women (p=0,014), patients with atrial fibrillation (AF) (p=0,012) and coronary disease (p=0,015). Higher LRL correlated with HF hospitalizations and related admissions to the emergency department (ED) (r=0,541, p=0,001), VT or VF episodes (r=0,337, p=0,005) and CRT-D number of therapies (r=0,342, p=0,004) and higher HRS (r=0,547, p<0,05).
Conclusion
Higher LRL programming was associated with higher HRS, HF decompensations with hospitalization or admission to the emergency department, VT or VF episodes and CRT-D therapies in a real world population. More studies are required but lower LRL may be preferred in HF patients.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- M Barradas
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - F Duarte
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | | | | | - C Serena
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | | | | | - C Machado
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - R Dourado
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - E Santos
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - A Tavares
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - D Martins
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
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Barradas M, Duarte F, Coutinho Dos Santos I, Resendes De Oliveira L, Serena C, Xavier Fontes A, Viveiros Monteiro A, Machado C, Dourado R, Santos E, Pelicano N, Pacheco M, Tavares A, Martins D. Biventricular or left univentricular pacing in heart failure patients: is there a better strategy. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Cardiac resynchronization therapy (CRT) is a cornerstone in treatment of heart failure (HF) with reduced left ventricular ejection fraction (LVEF) and ventricular dyssynchrony. Biventricular (BiV) pacing is often the preferred method and corrects electrical and mechanical dyssynchrony but Left ventricular (LV) preferential pacing is may preserve conduction via the right bundle branch, preventing deleterious effects from right ventricular. The evidence is sparse and there is doubts whether which programming strategy is better.
Purpose
We hypothesized that BiV is non-inferior to preferential LV pacing in HF patients with reduced LVEF and CRT devices in cardiovascular death and HF hospitalizations.
Methods
We retrospectively evaluated 147 patients with HF patients with reduced LVEF and CRT devices. Two groups were defined: LV pacing (group 1) and BiV pacing (group 2). Primary outcome was defined as cardiovascular death and secondary outcome as HF hospitalizations and NYHA class after CRT.
Results
Mean age was 70,26±10,6 years, 68,1% were males and follow-up was 52,22±44,51 months. One hundred and twenty six (85,7%) patients had implantable cardiac resynchronization therapy (CRT) defibrillator (CRT-D) and 21 (14,3%) CRT pacemaker (CRT-P). Mean LVEF was 31,1±8,5% and mean QRS duration before CRT implantation was 149,5±48,6 ms. Thirty-nine (36,4%) patients were in NYHA III–IV. HF aetiology was idiopathic in 51 (47,2%), ischemic in 36 (33,3%) and alcoholic cardiomyopathy in 9 (8,3%). Forty-five (40,5%) patients had atrial fibrillation and 37 (35,6%) coronary disease. Patients in group 2 were more frequently males than group 1 patients (46 (78,0%) vs 32 (56,1%) respectively, p=0,012). There were no differences in regard to age, LVEF, HF aetiology or other comorbidities between groups. In 57 (49,1%) CRT was programming in preferential LV pacing and 50 (50,9%) in BiV pacing. There were 2 deaths in group 1 and 3 in group 2 (OR 0.80, 95% CI 0.27–2.40). There were 0,98±3,17 hospitalizations per patient and there were no differences in HF hospitalizations between groups (OR 1.01, 95% CI 0.92–1.18) or NYHA after 6 months of CRT (p=0,364).
Conclusion
BiV pacing was not inferior to LV-only pacing in regard to cardiovascular death, HF hospitalizations and NYHA class improvement. There was no clear advantage for one pacing strategy over the other but more studies are still required.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- M Barradas
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - F Duarte
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | | | | | - C Serena
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | | | | | - C Machado
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - R Dourado
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - E Santos
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - A Tavares
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - D Martins
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
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10
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Barradas M, Duarte F, Coutinho Dos Santos I, Resendes De Oliveira L, Serena C, Xavier Fontes A, Viveiros Monteiro A, Machado C, Dourado R, Santos E, Pelicano N, Pacheco M, Tavares A, Martins D. Suboptimal coronary flow after PCI in STEMI patients: clinical implications and predictors. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Even in experienced angioplasty centers, percutaneous coronary intervention (PCI) in the acute setting of ST-elevation myocardial infarctions (STEMI) is associated with a low, but still significant rate of suboptimal coronary flow. Identification of its clinical impact and potential modifiable risk factors is important.
Purpose
To evaluate the clinical impact of suboptimal coronary flow after PCI in STEMI patients and to access potential predictors of suboptimal coronary flow.
Methods
We retrospectively evaluated 103 hospitalized patients with acute STEMI who were admitted to our center between 2018 and 2019 and underwent PCI. Coronary flow was accessed using the Thrombolysis in myocardial infarction (TIMI) Flow Grading System. Patients were divided into suboptimal patency of the culprit-vessel, defined as TIMI flow ≤2 (group 1, n=8 (7,8%)) and optimal patency of the culprit-vessel defined as TIMI flow 3 (group 2, n=95 (92,2%)). Glomerular filtration rate (GFR) was calculated using the Modification of Diet in Renal Disease (MDRD) formula.
Results
Mean age 58,15±12,6 years and 85,4% were males. Seventy-eight patients (75,7%) had history of smoking, 45 (43,7%) dyslipidemia, 20 (19,4%) previous acute coronary syndrome, 18 (17,5%) diabetes, 17 (15,5%) were obese and 4 (3,9%) had chronic kidney disease. The revascularization strategy was primary PCI in 55 (54,4%) patients and fibrinolytic therapy with facilitated PCI in 48 (46,6%) patients. Infarct-related artery was the left anterior descending artery in 45 (45,5%) and multivessel disease was present in 38 (38,0%). Angiographic no-reflow after PCI was 3,0%. Intrahospital cardiovascular death occurred in 4 (3,9%) patients and was significantly associated with suboptimal flow (p=0,036) and there was no association with stent thrombosis. Predictors of suboptimal flow were higher blood urea nitrogen, creatinine and GFR at hospital admission (p=0,017 and p=0,012), peak creatinine (p=0,012) and stent length (p=0,038). Suboptimal flow was associated with higher Zwolle score (p=0,010) and ischemic Paris score (p=0,036).
Conclusion
Failure to achieve optimal culprit-vessel patency after PCI in STEMI patients, although infrequent, is associated with increased hospital cardiovascular death. Longer stents could be and important modified risk factor. Renal dysfunction is an important comorbidity that should be promptly identified and could be partially improved with medical treatment.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- M Barradas
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - F Duarte
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | | | | | - C Serena
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | | | | | - C Machado
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - R Dourado
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - E Santos
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - A Tavares
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - D Martins
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
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11
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Marçal R, Pacheco M, Guilherme S. Unveiling the nexus between parental exposure to toxicants and heritable spermiotoxicity - Is life history a shield or a shadow? Environ Toxicol Pharmacol 2022; 95:103955. [PMID: 35970510 DOI: 10.1016/j.etap.2022.103955] [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: 03/29/2022] [Revised: 08/03/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
The knowledge on parental experiences is critical to predict how organisms react to environmental challenges. So, the DNA integrity of Procambarus clarkii spermatozoa exposed ex vivo to the herbicide penoxsulam (Px) or ethyl methanesulfonate (EMS; model genotoxicant) was assessed with and without the influence of in vivo parental exposure to the same agents. The parental exposure alone did not affect the DNA of unexposed spermatozoa. However, the history of Px exposure increased the vulnerability to oxidative lesions in Px-exposed offspring. Otherwise, parental exposure to EMS allowed the development of protection mechanisms expressed when F1 was also exposed to EMS, unveiling life history as a shield. The parental exposure to a different agent adverse and decisively affected Px spermiotoxic potential, pointing out life history as a shadow to progeny. Given the complexity of the aquatic contamination scenarios, involving mixtures, the spermiotoxicity of Px to wild P. clarkii populations emerged as probable.
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Affiliation(s)
- R Marçal
- Centre for Environmental and Marine Studies (CESAM), Department of Biology University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal.
| | - M Pacheco
- Centre for Environmental and Marine Studies (CESAM), Department of Biology University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - S Guilherme
- Centre for Environmental and Marine Studies (CESAM), Department of Biology University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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12
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Duarte F, Coutinho I, Barradas MI, Oliveira L, Serena C, Fontes A, Monteiro A, Machado C, Santos E, Pelicano N, Pacheco M, Tavares A, Martins D. Acute ST-elevation myocardial infarction: are men and women particular cases of STEMI ? Eur J Cardiovasc Nurs 2022. [DOI: 10.1093/eurjcn/zvac060.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background
ST-segment elevation myocardial infarction (STEMI) has high levels of morbidity and mortality. Multiple risk factors may contribute to clinical outcomes and some studies demonstrate gender-related differences in baseline characteristics and in-hospital management.
Purpose
To access the difference in clinical characteristics and prognostic outcomes between men and women who were admitted in our Cardiac Intensive Care Unit with STEMI diagnosis.
Methods
We retrospectively analyzed 121 non-consecutive patients with STEMI during a mean follow-up period 135 ± 31 weeks.
We accessed baseline characteristics and time course of events (symptom onset-to-door admission; time to first EKG; time to fibrinolytic therapy; door-to-cath lab time and time from fibrinolytic therapy to PCI (for patients transferred from another centers).
Primary endpoint (PE) was a composite of in-hospital cardiovascular death, arrhythmic events or STEMI evolution in Killip-Kimbal III or IV.
Secondary endpoint (SE) was in-hospital major bleeding events, considered intracerebral hemorrhage, cases of hemodynamic compromise or requiring a blood transfusion.
Tertiary endpoint (TE) included admissions to the emergency department or hospitalization by heart failure decompensation, acute or chronic coronary syndromes and all-cause mortality.
Results
Of the 121 patients, 102 were male (84.3%) and 19 (15.7%) female. The mean age was 58.3 ± 12.7 years and women had a superior mean age (69.8 ± 12.2 years) vs. Men mean age 56 ± 11.6 years.
Hypertension was more prevalent in women (84.2% vs. 47.1%, respectively; p 0.003) and also diabetes – 36.8% of women had type 2 diabetes (vs 10.8% of men) and 5.3% of these female patients requires insulin therapy (vs 2% of men; p 0.021).
According to Charlson Comorbidity Index (CCI), women had a higher disease burden with 73.7% of them included into the moderate or severe group of mortality risk, compared to 42.2% of men (p 0.014).
Conversely, less women smoke (31.6% vs. 82.2%; p <0.001) and less frequently chest pain was the onset symptom (78.9% vs. 95.1%; p 0.04).
Time since symptom onset to door admission was estimated on 510 ± 1149 minutes and the mean women delay was superior (557 ± 858 minutes).
Regarding to in-hospital hemorrhagic events (secondary endpoint), female patients had a statistically significant higher risk (22.2% vs. 7.1%, p 0.045), independently of hypertension, diabetes or anticoagulant therapy (r=0.249; ANOVA p-value < 0.005), but it was associated with higher CCI (p 0.033). No other gender differences in outcomes or survival function were observed.
Conclusion
Our study demonstrates gender-related differences among patients with STEMI. Indeed, women were older, had more clinical cardiovascular risk factors and tend to delay hospital admission after symptoms onset. Secondary endpoint was statistically more frequent in women, but no other differences in outcomes were observed.
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Affiliation(s)
- F Duarte
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - I Coutinho
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - M I Barradas
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - L Oliveira
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - C Serena
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - A Fontes
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - A Monteiro
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - C Machado
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - E Santos
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - A Tavares
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
| | - D Martins
- Hospital Divino Espirito Santo , Ponta Delgada , Portugal
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13
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Rojas C, León A, Pacheco M, Chico L, Orellana PA. Transport signatures of few-atom carbon rings. Phys Chem Chem Phys 2022; 24:15973-15981. [PMID: 35730548 DOI: 10.1039/d2cp01308h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We study the electronic transport through an all-carbon quantum ring side-coupled to a quantum wire. We employ both first-principles calculations and a tight-binding approach; the latter allows for the derivation of analytical expressions for the conductance and density of states, which facilitates the interpretation of the transport characteristics. Two bond models are employed: either all the hoppings are equal (cumulenic ring) or they have alternating bonds (polyynic ring). Assuming cumulenic bonds, if the number of atoms in the carbon ring is a multiple of four, it produces an antiresonant peak in the conductance at the Fermi level. This effect disappears for the polyynic configuration, i.e., when the hoppings in the carbon rings are alternating. Additionally, a gap opens at the Fermi energy in the polyynic rings, yielding distinct transport signatures for the two bond configurations. Comparison to first-principles calculations shows an excellent agreement on the changes of the conductance due to the carbon ring. We propose such transport measurements as a way to elucidate the character of the bonds in these novel carbon nanostructures.
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Affiliation(s)
- Carlos Rojas
- Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110 V, Valparaíso, Chile.
| | - A León
- Instituto de Ciencias Básicas, Facultad de Ingeniería, Universidad Diego Portales, Avda. Ejército 441, Santiago, Chile
| | - M Pacheco
- Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110 V, Valparaíso, Chile.
| | - Leonor Chico
- Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110 V, Valparaíso, Chile. .,GISC, Departamento de Física de Materiales, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - P A Orellana
- Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110 V, Valparaíso, Chile.
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14
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Pacheco P, Pacheco M, Molini-Avejonas D. Assessment of stress and anxiety during the COVID-19 pandemic in caregivers of children with ASD. Eur Psychiatry 2022. [PMCID: PMC9564259 DOI: 10.1192/j.eurpsy.2022.712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Introduction
An infectious disease such as COVID-19 can have a great impact on mental health due to the fear of contracting it as well as the social isolation itself due to the containment measures. Such events are considered stressors, as they can be perceived as threatening or challenging, and can have cumulative effects that are harmful to mental health. Along with this scenario, anxiety can occur in association with stress, and it is defined as extreme concern and somatic symptoms that generate tension, hindering the proper functioning and development of basic life functions. In people with Autism Spectrum Disorder (ASD) and their families, such events can occur more intensely, as changing routine and adapting to different activities are usually challenging. The study examined stress, anxiety and coping strategies during the pandemic.
Objectives
To analyze stressful events, anxiety and coping strategies in caregivers of children and adolescents with ASD and typical development.
Methods
Forty caregivers of children and adolescents with ASD and 40 of typically developing participated in the study. The assessment instruments used were: 1. RSQ COVID-19; 2. Semi-structured interview; 3. State–Trait Anxiety Inventory for Adults. For statistical analysis, analysis of variance (ANOVA) or chi-square were used.
Results
Caregivers of children and adolescents with ASD showed greater stress and anxiety, in addition to using less adaptive coping strategies.
Conclusions
There is a great need to welcome families of children and adolescents with ASD, helping to develop coping or coping strategies.
Disclosure
No significant relationships.
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15
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Carvalhais A, Oliveira IB, Oliveira H, Oliveira CCV, Ferrão L, Cabrita E, Asturiano JF, Guilherme S, Pacheco M, Mieiro CL. Ex vivo exposure to titanium dioxide and silver nanoparticles mildly affect sperm of gilthead seabream (Sparus aurata) - A multiparameter spermiotoxicity approach. Mar Pollut Bull 2022; 177:113487. [PMID: 35245769 DOI: 10.1016/j.marpolbul.2022.113487] [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: 01/07/2022] [Revised: 02/17/2022] [Accepted: 02/20/2022] [Indexed: 06/14/2023]
Abstract
Nanoparticles (NP) are potentially reprotoxic, which may compromise the success of populations. However, the reprotoxicity of NP is still scarcely addressed in marine fish. Therefore, we evaluated the impacts of environmentally relevant and supra environmental concentrations of titanium dioxide (TiO2: 10 to 10,000 μg·L-1) and silver NP (Ag: 0.25 to 250 μg·L-1) on the sperm of gilthead seabream (Sparus aurata). We performed short-term direct exposures (ex vivo) and evaluated sperm motility, head morphometry, mitochondrial function, antioxidant responses and DNA integrity. No alteration in sperm motility (except for supra environmental Ag NP concentration), head morphometry, mitochondrial function, and DNA integrity occurred. However, depletion of all antioxidants occurred after exposure to TiO2 NP, whereas SOD decreased after exposure to Ag NP (lowest and intermediate concentration). Considering our results, the decrease in antioxidants did not indicate vulnerability towards oxidative stress. TiO2 NP and Ag NP induced low spermiotoxicity, without proven relevant ecological impacts.
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Affiliation(s)
- A Carvalhais
- CESAM and Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - I B Oliveira
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, 4450-208 Matosinhos, Portugal.
| | - H Oliveira
- CESAM and Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - C C V Oliveira
- Centre of Marine Sciences (CCMAR), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - L Ferrão
- Centre of Marine Sciences (CCMAR), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal; Grupo de Acuicultura y Biodiversidad, Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, Spain
| | - E Cabrita
- Centre of Marine Sciences (CCMAR), University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - J F Asturiano
- Grupo de Acuicultura y Biodiversidad, Instituto de Ciencia y Tecnología Animal, Universitat Politècnica de València, Spain
| | - S Guilherme
- CESAM and Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - M Pacheco
- CESAM and Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - C L Mieiro
- CESAM and Department of Biology, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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16
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Wen Z, Juliana P, Dhugga HS, Pacheco M, Martínez UI, Aguilar A, Ibba MI, Govindan V, Singh RP, Dhugga KS. Genome-Wide Association Study of Phytic Acid in Wheat Grain Unravels Markers for Improving Biofortification. Front Plant Sci 2022; 13:830147. [PMID: 35242157 PMCID: PMC8886111 DOI: 10.3389/fpls.2022.830147] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 01/10/2022] [Indexed: 06/07/2023]
Abstract
Biofortification of cereal grains offers a lasting solution to combat micronutrient deficiency in developing countries where it poses developmental risks to children. Breeding efforts thus far have been directed toward increasing the grain concentrations of iron (Fe) and zinc (Zn) ions. Phytic acid (PA) chelates these metal ions, reducing their bioavailability in the digestive tract. We present a high-throughput assay for quantification of PA and its application in screening a breeding population. After extraction in 96-well megatiter plates, PA content was determined from the phosphate released after treatment with a commercially available phytase enzyme. In a set of 330 breeding lines of wheat grown in the field over 3 years as part of a HarvestPlus breeding program for high grain Fe and Zn, our assay unraveled variation for PA that ranged from 0.90 to 1.72% with a mean of 1.24%. PA content was not associated with grain yield. High yielding lines were further screened for low molar PA/Fe and PA/Zn ratios for increased metal ion bioavailability, demonstrating the utility of our assay. Genome-wide association study revealed 21 genetic associations, six of which were consistent across years. Five of these associations mapped to chromosomes 1A, 2A, 2D, 5A, and 7D. Additivity over four of these haplotypes accounted for an ∼10% reduction in PA. Our study demonstrates it is possible to scale up assays to directly select for low grain PA in forward breeding programs.
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17
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Duarte F, Barradas MI, Barradas MI, Oliveira L, Oliveira L, Serena C, Serena C, Fontes A, Fontes A, Monteiro A, Monteiro A, Machado C, Machado C, Dourado R, Dourado R, Santos E, Santos E, Pelicano N, Pelicano N, Pacheco M, Pacheco M, Tavares A, Tavares A, Martins D, Martins D. Risk scores in predicting adverse events after an acute coronary syndrome. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehab849.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Introduction
ST-segment elevation myocardial infarction (STEMI) is a serious event that usually occur in patients with cardiovascular risk factors and is associated with great morbidity and mortality.
PARIS ischemic risk score and TIMI score were validated to evaluate ischemic risk in STEMI patients who underwent percutaneous coronary intervention (PCI) and to estimate mortality, respectively.
Despite these specific purposes, the usefulness of these scores in predicting adverse cardiovascular events (ACE) is unknown.
Objectives
To assess the prognostic value of PARIS and TIMI scores for cardiovascular events, coronary ischemic events and mortality in patients after STEMI.
Methods
Retrospective single center cohort study enrolled 103 patients with STEMI diagnosis between 2018 and 2019, during a mean follow-up period 30.30 ± 6.46 months and patients were included regardless of the reperfusion strategy.
Primary endpoint (PE) was a composite of acute coronary events (ACE), admissions to the emergency department by heart failure (HF) decompensation or chronic coronary syndrome and HF hospitalization. Secondary endpoint (SE) was ACE. Cardiovascular and non-cardiovascular death was determined.
PARIS ischemic risk score was calculated and patients were stratified into low (0-2), intermediate (3-4) or high (≥ 5) ischemic risk categories. TIMI score was also assessed.
Results
Out of 103 patients with STEMI diagnosis, the median age was 58.15 ± 12.6 years and 85,4% were male. Fifty-seven patients (55.3%) had hypertension, 45 (43.7%) dyslipidemia, 18 (17.5%) diabetes, 17 (15.5%) were obese and seventy-eight patients (75.7%) had history of smoking. Twenty (19.4%) patients had a previous acute coronary syndrome and 15 underwent PCI.
Twenty-five (24.3%) patients were included in low PARIS ischemic risk category, 53 (51.5%) in intermediate risk and 20 (19.4%) in high risk category.
PE occurred in 16 patient (15.5%) and SE in 7 patients (6.8%).
Eight patients died during the follow-up period (7.8%), 4 of cardiovascular causes (50%), 3 of non-cardiovascular causes (37.5%) and 1 of unknown cause.
PARIS ischemic risk score showed prognostic value for PE, with an area under the curve (AUC) of 0.65, 95% confidence interval (CI) 0.506-0.806 and p-value 0.039.
PARIS score also had predictive value for SE (AUC 0.816, 95% CI 0.604-1.000; p 0.004) as well as TIMI score (AUC 0.738, 95% CI 0.560 – 0.917; p 0.032).
Both scores showed a good prognostic value in evaluating all-cause mortality, with a slightly better predictive value for TIMI score (AUC 0.91, 95% CI 0.802 – 1.00) when compared to PARIS score (AUC 0.84, 95% CI 0.685 – 0.987).
Conclusion
This study revealed that PARIS and TIMI scores have a good discriminatory power to predict prognosis in STEMI patients. According to our study results, these scores could be an interesting tool to determine the likelihood of fatal and non-fatal outcomes, including ACS.
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Affiliation(s)
- F Duarte
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - M I Barradas
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - M I Barradas
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - L Oliveira
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - L Oliveira
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Serena
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Serena
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Fontes
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Fontes
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Monteiro
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Monteiro
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Machado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Machado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - R Dourado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - R Dourado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - E Santos
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - E Santos
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Tavares
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Tavares
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - D Martins
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - D Martins
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
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18
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Duarte F, Barradas MI, Oliveira L, Serena C, Fontes A, Monteiro A, Machado C, Dourado R, Santos E, Pelicano N, Pacheco M, Tavares A, Martins D. Hemorrhagic risk scores in hospitalized patients with acute coronary syndrome: can they (only) predict bleeding events? Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehab849.082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Introduction
Acute coronary syndrome (ACS) is a life-threatening condition and its therapeutic approach increases the risk of important bleeding events which are associated with a worse prognosis. Along with hemorrhagic events, a drop on hemoglobin level not related to bleeding or the development of anemia could have a negative impact on prognosis.
Both CRUSADE and PARIS bleeding risk scores are used to evaluate and to stratify the risk of major bleeding in ACS. However their actual predictive value has been questioned and validity of these scores in predicting in-hospital mortality (IHM) is not established.
Objectives
To evaluate the actual prognostic value of CRUSADE and PARIS bleeding scores in ACS patients during their hospitalization stay.
Methods
Retrospective single center cohort study including 103 hospitalized patients after an acute ST-segment elevation myocardial infarction (STEMI) regardless of its reperfusion strategy.
In-hospital major hemorrhagic events (IHMHE), considered intracerebral hemorrhage, those resulting in hemodynamic compromise or requiring a blood transfusion, were assessed. Data on hemoglobin levels (HL) at hospital admission and at the time of hospital discharge were also collected and a composite endpoint (CE) of IHMHE and a drop in HL ≥ 3g/dL were elaborated.
Both scores were calculated for each patient, its predictive value and their impact on IHM were determined.
Results
Out of 103 patients enrolled, the median age was 58.15 ± 12.6 years and 85.4% were male.
Two IHMHE occurred, twenty patients (19.4%) had anemia at the time of hospital discharge and 16 of these patients (15.5%) were not anemic at the time of hospital admission. Nine (8.7%) patients had a drop in their HL of at least 3g/dL.
The five bleeding risk categories defined by CRUSADE investigators were used, with 48 (46.6%) patients in the very low risk category, 9 (8.7%) and 6 (5.8%) in the high and very high risk category, respectively.
Hospitalization length stay was 5.6 ± 4.1 days with an overall in-hospital mortality (IHM) of 5.8%.
Receiver operating characteristic curve (ROC) analysis showed that CRUSADE score had an excellent discriminatory power for the CE (AUC 0.927, 95% CI 0.854-1.000) and the PARIS score had an acceptable discriminatory value (AUC 0.775, 95% CI 0.616-0.935).
Both CRUSADE and PARIS bleeding scores also had prognostic value in evaluating IHM (AUC 0.929, 95% CI 0.856-1.000 and AUC 0.788, 95% CI 0.634-0.942, respectively).
No specific and independent predictors of IHMHE were found, neither related to individual characteristics nor to therapeutic approach.
Conclusion
The presenting study showed that CRUSADE and PARIS scores still have discriminatory power to assess CE and to assess IHM in ACS patients. Their addition to stratification tools could be of interest.
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Affiliation(s)
- F Duarte
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - M I Barradas
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - L Oliveira
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Serena
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Fontes
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Monteiro
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Machado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - R Dourado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - E Santos
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Tavares
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - D Martins
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
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Pacheco M, González-Platas J, Julve M, Lloret F, Kremer C, Cuevas A. Crystal structure and magnetic properties of 3,5-pyridinedicarboxylate-bridged Re(II)M(II) heterodinuclear complexes (M = Cu, Ni and Co). Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Barradas Da Silva M, Duarte F, Oliveira L, Serena C, Fontes A, Monteiro A, Machado C, Dourado R, Santos E, Pelicano N, Pacheco M, Tavares A, Martins D. STEMI treatment in remote areas – challenges of the only interventional angioplasty center located in an archipelago. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
In remote islands lack of specialized medical facilities, long distance transfer and emergency medical system organization remains a challenge and fibrinolysis is necessary to achieve revascularization in optimal timing in ST-elevation myocardial infarction (STEMI) patients. Our angioplasty center is the only one located in an archipelago composed of nine islands, six of which do not have hospital facilities and only have small family health care units.
Purpose
To evaluate the reality and outcomes of our interventional angioplasty center and compare cardiovascular outcomes between STEMI patients from the main island and remote islands.
Methods
We retrospectively evaluated 103 patients with STEMI admitted to our center between 2018 and 2019. Patients from the main island where the center is located underwent primary percutaneous coronary intervention (PCI) (group 1, n=55) and patients from remote islands underwent fibrinolytic therapy followed by transference to our center with facilitated or rescue PCI (group 2, n=48). A subanalysis of the far remote islands without hospital facilities was also performed. Primary outcome was defined as cardiovascular death or re-infarction at two years and secondary outcome as intrahospital haemorrhagic complications.
Results
Mean age was 58,15±12,6 years, 85,4% were males and follow up period was 30,30±6,46 months. Seventy-eight patients (75,7%) had history of smoking, 45 (43,7%) dyslipidemia, 20 (19,4%) previous acute coronary syndrome, 18 (17,5%) diabetes and 17 (15,5%) were obese. Troponin I peak was 117,42±129,06 ug/L and 14 (13,6%) were in Killip Class III/IV. Infarct-related artery was the left anterior descending artery in 45 (45,5%) and multivessel disease was present in 38 (38,0%). In group 1 reperfusion after PCI was obtained in 91,5%. In group 2, 73,5% met criteria for reperfusion after fibrinolysis and 23,6% after rescue PCI. Mean time from fibrinolysis to PCI was 558±349 minutes. Rates of successful revascularization did not differ between groups, as well as complete patency of the culprit-vessel defined as thrombolysis in myocardial infarction (TIMI) flow 3 (91,5% vs. 97,2% and 90,0% vs. 93,0% respectively for group 1 and 2). Cardiovascular death at two years occurred in 4 (3,9%) patients and re-infarction in 11 (10,7%) and were similar between groups (3 (5,5%) vs. 1 (2,1%) and 8 (14,5%) vs. 3 (6,3%) respectively) as well as haemorrhagic complications (1 (1,8%) vs. 5 (10,4%) respectively). Nineteen (18,4%) patients were from far remote islands without hospital facilities and when comparing these patients with the others there was also no difference in primary outcome.
Conclusion
Even in remote islands, an organized STEMI network with attempted fibrinolytic treatment and coordinated transference of patients for facilitated or rescue PCI can provide successful revascularization with cardiovascular outcomes similar to those submitted to primary PCI.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
| | - F Duarte
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - L Oliveira
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Serena
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Fontes
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Monteiro
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Machado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - R Dourado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - E Santos
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Tavares
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - D Martins
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
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Duarte F, Barradas M, Oliveira L, Serena C, Dourado R, Fontes A, Monteiro A, Machado C, Santos E, Pelicano N, Tavares A, Pacheco M, Martins D. New York Heart Association class change on heart failure patients with implantable devices: does it matters? Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Chronic heart failure (CHF) is a pathology with high prevalence and an important cause of morbidity and mortality. Benefits of implantable devices have been demonstrated in selected groups of patients with benefits on symptoms and heart failure hospitalization.
Purpose
To determine the clinical impact of New York Heart Association class change (NYHA) in patients with CHF and Cardiac Implantable Electric Devices (CIEDs).
Methods
We retrospectively enrolled 178 consecutive patients with CHF and CIEDs between November 2003 and January 2021, during a follow-up period of 51±43,9 months. Patients demographic characteristic and NYHA class change impact on occurrence of arrhythmic events, heart failure hospitalization (HFH) or long-term admission in an emergency department were assessed. Patients with NYHA class change were considered responders to therapy.
Results
Out of 178 patients enrolled in this study, sixty-seven (37,6%) had a reduction ≥1 in NYHA functional class and in this group, 61 patients (91,0%) had a cardiac resynchronization therapy (CRT) and 9% had an implantable cardioverter defibrillator. Mean age 68±11,3 years, 44 (65,7%) patients were male, 33 (49,2%) were in NYHA class II, 30 (44,8%) NYHA class III and 4 (6%) NYHA class IV. Mean QRS width 129,9±63,1 ms before CIEDs. Fifty-eight patients (86,6%) had an improvement in one NYHA functional class and 9 patients (13,4%) in two NYHA functional class.
Fourty NYHA responders patients (59,7%) had paroxistic or permanent atrial fibrillation and 31,9% had an epicardial coronary artery disease, that was a negative predictor of NYHA response (p=0,012).
A total of 35 (19,7%) enrolled patients experience non-sustained ventricular tachycardia (NSVT) and 74,3% were non-responders (p=0,019).
There was fifteen and twenty HFH at 2 and 5 years of follow-up, respectively, and we observed that an improvement in NYHA class was associated with a reduction in HFH at 2 years of follow-up (p=0,043; OR 0,029, 95% CI 0,050–1,06) and 5 years of follow-up (p 0,027, OR 0,252; 95% CI 0,069 – 0,915). Emergency department (ED) admission related to HF decompensations was significantly reduced at 2 years of follow-up (p=0,035, OR 0,22, 95% CI 0,048 – 1,0) and at 5 years of follow-up (p=0,001, OR 0,15, 95% CI 0,044 – 0,55).
There was no difference on cardiovascular or all-cause mortality.
Conclusion
CHF patients with CIEDs and improving on NYHA class have less NSVT episodes, HFH and HF decompensations with ED admission, both at 2 and 5 years of follow-up.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- F Duarte
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - M.I Barradas
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - L Oliveira
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Serena
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - R Dourado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Fontes
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Monteiro
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Machado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - E Santos
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Tavares
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - D Martins
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
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Barradas Da Silva M, Duarte F, Oliveira L, Serena C, Fontes A, Monteiro A, Machado C, Dourado R, Santos E, Pelicano N, Pacheco M, Tavares A, Martins D. Non-sustained ventricular tachycardia on remote patient monitoring in heart failure patients. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Non-sustained ventricular tachycardia (NSVT) is commonly found in patients with structural heart disease and was historically obtained from registers of external ambulatory monitoring. The advent of remote patient monitoring (RPM) in Cardiac implantable electronic devices (CIEDs) has made it possible to detect asymptomatic NSVT in Heart Failure (HF) patients more frequently, but its impact in real world is uncertain.
Purpose
To determine the clinical impact of NSVT detection in RPM in ischemic and non-ischemic chronic heart failure patients with reduced ejection fraction (HFrEF) and CIEDs.
Methods
We retrospectively enrolled 121 consecutive patients with HFrEF, CIEDs and RPM. Patients were evaluated through routine episodic CIEDs interrogation, routine clinical evaluations and continuous monitoring data obtained from CIEDs and transmitted remotely to the care team and divided into NSVT positive (Group 1) and negative groups (Group 2). Primary endpoint was admissions to the emergency department by HF decompensation and secondary endpoint was the occurrence of arrhythmic events. A sub-analysis of non-ischemic HF was also performed.
Results
NSVT was detected in 78 (72,2%) patients. The mean number of episodes of NSVT was 611,68±3271,25 during the follow-up period or 2,445±16,688 in 24 hours. Mean age was 62,40±13,218 years, 71,9% were males and mean follow-up period was 56,30±39,37 months. Fifty-eight patients (47,9%) had transvenous implantable cardioverter defibrillator (ICD), 48 (39,7%) implantable cardiac resynchronization therapy (CRT) defibrillator (CRT-D), 14 (11,6%) subcutaneous ICD (S-ICD) and 1 (0,8%) CRT pacemaker (CRT-P). Medium left ventricular ejection fraction (LVEF) was 34,70±12,53%, 25 (23,14%) were in NYHA III-IV and 46 (39,0%) were ischemic (29 (37,7%) in Group 1 and 11 (37,9%) in Group 2). NSVT was associated with the occurrence of sustained ventricular tachycardia (VT) (1,88±0,186episodes of VT in group 1 and 0,03±0,186 in group 2, p=0,012), ventricular fibrillation (VF) (1,44±5,325 episodes of VT in group 1 and 0,03±0,186 in group 2, p=0,011) and admissions to the emergency department by HF decompensation at 5 years (r=0,310, p=0,011). A sub-analysis in non-ischemic HF patients also showed correlation between NSVT and VT (r=0,602, p<0,05) and admissions to the emergency department by HF decompensation at 5 years (r=0,382, p=0,014).
Conclusions
On remote patient monitoring with CIEDs, NSVT in HF patients was associated with arrhythmic events and may serve as a predictor for HF decompensations.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
| | - F Duarte
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - L Oliveira
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Serena
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Fontes
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Monteiro
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Machado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - R Dourado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - E Santos
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Tavares
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - D Martins
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
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Barradas Da Silva M, Duarte F, Oliveira L, Serena C, Fontes A, Monteiro A, Machado C, Dourado R, Santos E, Pelicano N, Pacheco M, Tavares A, Martins D. Prognostic significance of non-sustained ventricular tachycardia on stored electrograms of heart failure patients with cardiovascular implantable electronic devices. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
Non-sustained ventricular tachycardia (NSVT) is commonly found in patients with structural heart disease and was historically obtained from registers of external ambulatory monitoring. The advent of Cardiac implantable electronic devices (CIEDs) has made it possible to detect asymptomatic NSVT in Heart Failure (HF) patients more frequently, but its true impact in real world is uncertain, and often does not lead to a change in clinical intervention.
Purpose
To determine the prognostic significance of NSVT detection on stored electrograms of CIEDs in HF patients with systolic left ventricle dysfunction.
Methods
We retrospectively enrolled 132 consecutive HF patients (mean age 67,5±11,1 years, males 72,0%) with systolic left ventricle dysfunction and CIEDs (biventricular pacemakers with or without cardiac defibrillators). Patients were evaluated through CIEDs interrogation and clinical evaluations and divided into NSVT positive (Group 1) and negative groups (Group 2). Mean follow-up period was 62,8±7,1 months.
Results
NSVT was detected in 51 (38,6%) patients. 70 (53,0%) had implantable cardiac resynchronization therapy (CRT) defibrillator (CRT-D), 37 (28,0%) transvenous implantable cardioverter defibrillator (ICD), 13 (9,8%) CRT pacemaker (CRT-P) and 12 (9,1%) subcutaneous ICD (S-ICD). Medium left ventricular ejection fraction (LVEF) was 31,1±7,9%, 20,6% were in NYHA III-IV and 47,0% were ischemic (49% Group 1 and 45,7% Group 2, p=0,708). Dyslipidemia was more prevalent in Group 2 (p=0,042). In total 11 (8,3%) patients died, 2 (1,5%) from sudden cardiac death and 5 (3,8%) from cardiovascular death. NSVT was associated with CIEDs treatments (hazard ratio [HR]2,52; 95% confidence interval [CI]1,2–5,1; p=0,001), ventricular fibrillation (VF) (HR: 3,71, 95% CI: 1,19–11,58; p=0,018), sustained ventricular tachycardia (VT) (HR: 9,06, 95% CI: 2,82–29,12; p<0,05) and composite outcome of VT, VF, HF re-admissions and related admissions to emergency department (ED) and death by all causes (HR: 2,52; 95% CI: 1,20–5,10; p=0,011). NSVT at 1 year was associated with HF readmissions at 1 year (p=0,004).
Conclusions
On extended monitoring possible with CIEDs, NSVT in HF patients was associated with a worse prognosis and may serve as a predictor of significant arrhythmic events, HF hospitalizations and mortality. These findings enhances the importance of remote monitoring and optimization of therapeutic modalities in these patients along with a close supervision.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
| | - F Duarte
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - L Oliveira
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Serena
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Fontes
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Monteiro
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Machado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - R Dourado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - E Santos
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Tavares
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - D Martins
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
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Pacheco M, Alvarez N, Cuevas A, Romerosa A, Lloret F, Kremer C. Crystal structure and magnetic study of the complex salt [RuCp(PTA) 2-μ-CN-1κ C:2κ N-RuCp(PTA) 2][Re(NO)Br 4(EtOH) 0.5(MeOH) 0.5]. Acta Crystallogr E Crystallogr Commun 2021; 77:749-754. [PMID: 34513024 PMCID: PMC8382050 DOI: 10.1107/s2056989021006381] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 06/18/2021] [Indexed: 12/27/2022]
Abstract
A new RuII-ReII complex salt, μ-cyanido-κ2 C:N-bis-[(η5-cyclo-penta-dien-yl)bis(3,5,7-tri-aza-phosphaadamantane-κP)ruthenium(II)] tetra-bromido-(ethanol/methanol-κO)nitrosylrhenate(II), [Ru(CN)(C5H5)2(C6H12N3P)4][ReBr4(NO)(CH4O)0.5(C2H6O)0.5] or [RuCp(PTA)2-μ-CN-1κC:2κ2 N-RuCp(PTA)2][Re(NO)Br4(EtOH)0.5(MeOH)0.5] (PTA = 3,5,7-tri-aza-phosphaadaman-tane) was obtained and characterized by single-crystal X-ray diffraction, elemental analysis and infrared spectroscopy. The title salt was obtained by liquid-liquid diffusion of methanol/DMSO solutions of (NBu4)[Re(NO)Br4(EtOH)] and [(PTA)2CpRu-μ-CN-1κC:2κ2 N-RuCp(PTA)2](CF3SO3). The RuII and ReII independent moieties correspond to a binuclear and mononuclear complex ion, respectively. A deep geometrical parameter analysis was performed, and no significant differences were found with earlier reports containing similar mol-ecules. The magnetic properties were investigated in the temperature range 2.0-300 K, and the complex behaves as a quasi-magnetically isolated spin doublet with weak anti-ferromagnetic inter-actions.
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Affiliation(s)
- Mario Pacheco
- Area Quimica Inorganica, Facultad de Quimica, Universidad de la República, 11800, Montevideo, Uruguay
| | - Natalia Alvarez
- Area Quimica Inorganica, Facultad de Quimica, Universidad de la República, 11800, Montevideo, Uruguay
| | - Alicia Cuevas
- Area Quimica Inorganica, Facultad de Quimica, Universidad de la República, 11800, Montevideo, Uruguay
| | - Antonio Romerosa
- Area de Quimica Inorganica-CIESOL, Universidad de Almeria, 04120 Almeria, Spain
| | - Francesc Lloret
- Instituto de Ciencia Molecular, Universidad de Valencia, C/ Catedratico Jose, Beltran 2, 46980 Paterna, Valencia, Spain
| | - Carlos Kremer
- Area Quimica Inorganica, Facultad de Quimica, Universidad de la República, 11800, Montevideo, Uruguay
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Pacheco P, Pacheco M, Molini-Avejonas D, Mota-Loss A. Adolescents with cleft lip and palate (CLP): Stressful events and coping. Eur Psychiatry 2021. [PMCID: PMC9479787 DOI: 10.1192/j.eurpsy.2021.1936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
IntroductionIndividuals with CLP may present communication disorders, velopharyngeal dysfunction, dento-occlusal changes and hearing losses. Adolescents with CLP usually show greater impairment of communication. Such characteristics combined with the malformed face can impact psychosocial functioning and increase the risk of psychological difficulties. Life-stressing experiences from CLP to life events typical of adolescence, may threaten the well-being of the adolescent, and are linked to mental health and behavioral problems.ObjectivesTo verify the coping of adolescents with CLP through a descriptive cross - sectional study.MethodsFifteen adolescents with CLP participated in the study. To evaluate them it was used the Coping scale (Lees, 2007), for the verification of coping in the families proposed by Motivational Theory of Coping. The analysis of the coping of adolescents with CLP considered two adverse contexts, namely “birth with fissure” and “have your secret told by a friend ”.ResultsIn relation to the evaluation of the psychological needs of relationship, competence and autonomy faced the “birth with fissure” indicates that teens with fissures do not perceive this stressor as a threat to their basic psychological needs.ConclusionsThe adolescents with CLP who participated in the study feel more interested (perception of the challenge) in dealing with the stressor relative to the fissure than in dealing with the betrayal of a friend, who reveals a secret of his to other people.DisclosureNo significant relationships.
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Pacheco P, Pacheco M, Marinho D, Oliveira T, Marques A, Souza K, Franco E, Maia J, Silva L, Molini-Avejonas D. Impacts of social distancing during the covid19 pandemic on the development of children with autism in Brazil. Eur Psychiatry 2021. [PMCID: PMC9528258 DOI: 10.1192/j.eurpsy.2021.704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Introduction
COVID-19 is a respiratory disease and its main symptoms are fever, dry cough and difficulty breathing. It spread to several countries, which led the World Health Organization to decree, on March 11, 2020, a pandemic state that deeply affected Brazil. Due to the impossibility of leaving the house, the routine of children with autism was changed. Children in Autism Spectrum Disorder (ASD) have a qualitative deficit in social interaction. Clinical and daily observations reinforce several scientific studies that defend the importance of maintaining a routine as stable as possible for people with ASD, without this stability they may become emotionally disorganized, feel discomfort or even irritability.ObjectivesInvestigate the impact caused by social distancing on the development of children and adolescents with autism.MethodsAn online questionnaire based on the DIR/Floortime basic map of emotional functional capacity development was distributed in Brazil from April to May, 2020. The results were analyzed using SPSS software.ResultsResults obtained from 122 questionnaires showed that after 30 days of quarantine 20% of children no longer had the characteristic of being able to remain calm and organized for at least 2 minutes; 11% no longer initiates interactions with their parents; 27% demonstrated more protests and anger than before the social distancing; 18% demonstrated more emotions such as anger, fear and intimacy, 28% began to understand their limits and 12% of the children are using greater facial expression during the social distancing.ConclusionsThis study brings results that can help to understand the processes in a child with autism.
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Pacheco P, Pacheco M, Molini-Avejonas D. Study of 18 months of follow up dir floortime intervention in preschool children with autism spectrum disorder (ASD). Eur Psychiatry 2021. [PMCID: PMC9475800 DOI: 10.1192/j.eurpsy.2021.1346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Introduction Children in Autism Spectrum Disorder (ASD) have a qualitative deficit in social interaction. The DIR/Floortime (Stanley Greenspan and Serena Wieder) is based on the Child’s Functional Development, Individual Differences and Relationships (D for development, I for individuality or individual differences and R for relationship), aiming at building the foundations for social, emotional and intellectual skills of children. Objectives To determine the results of 18 months DIR/Floortime™ parent training for an additional benefit in encouraging children with ASD climbing the developmental “ladder”. Methods The participants are 15 children with ASD aged between 2 and 6 years-old. The follow-up occurs in two private DIR Floortime Model service centers in Brazil. Protocols: Functional Emotional Assessment Scale – FEAS and Functional Emotional Developmental Questionnaire – FEDQ. The participants were followed-up one on one every four months. Results At the first month of assessment the children showed lack of self regulation, social interaction and engagement with their parents in a symbolic, sensory and motor play setting. At the following evaluations, they showed increase of social interaction and engagement in the same play setting. Besides the high affect of the parents during the play time promoted a two way purpose communication and behavioral organization. Conclusions Children showed a good development of functional and emotional capacities during the study period, demonstrating the effectiveness of the DIR/Floortime model in the intervention.
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Bravo S, Pacheco M, Nuñez V, Correa JD, Chico L. Two-dimensional Weyl points and nodal lines in pentagonal materials and their optical response. Nanoscale 2021; 13:6117-6128. [PMID: 33885603 DOI: 10.1039/d1nr00064k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Two-dimensional pentagonal structures based on the Cairo tiling are the basis of a family of layered materials with appealing physical properties. In this work we present a theoretical study of the symmetry-based electronic and optical properties of these pentagonal materials. We provide a complete classification of the space groups that support pentagonal structures for binary and ternary systems. By means of first-principles calculations, the electronic band structures and the local spin textures in momentum space are analyzed for four examples of these materials, namely, PdSeTe, PdSeS, InP5 and GeBi2, all of which are dynamically stable. Our results show that pentagonal structures can be realized in chiral and achiral lattices with Weyl nodes pinned at high-symmetry points and nodal lines along the Brillouin zone boundary; these degeneracies are protected by the combined action of crystalline and time-reversal symmetries. Additionally, we computed the linear and nonlinear optical features of the proposed pentagonal materials and discuss some particular features such as the shift current, which shows an enhancement due to the presence of nodal lines and points, and their possible applications.
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Affiliation(s)
- Sergio Bravo
- Departamento de Física, Universidad Técnica Federico Santa María, Valparaíso, Chile
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González I A, Pacheco M, Calle AM, Siqueira EC, Orellana PA. Dicke and Fano-Andreev reflections in a triple quantum-dot system. Sci Rep 2021; 11:3941. [PMID: 33594199 PMCID: PMC7887278 DOI: 10.1038/s41598-021-83407-6] [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] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 01/29/2021] [Indexed: 11/08/2022] Open
Abstract
This article studies quantum interference effects and their influence on the electronic transport through a parallel triple quantum-dot system coupled to normal and superconducting leads in the linear response and non-equilibrium regime. We model the system by a triple impurity Anderson Hamiltonian including the Coulomb intra-dot correlations in all quantum-dots. Using the non-equilibrium Green's function formalism, we calculate the Andreev conductance and the transmittance for energies within the superconductor gap. Our results show that the Andreev reflection spectra, both in the presence and absence of Coulomb interaction, reveal Fano and Dicke-like resonances in analogy to the Fano and Dicke effects in atomic physics. As one of the main results, we obtain that the charge shows abrupt changes due to the Dicke effect.
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Affiliation(s)
- A González I
- Departamento de Física, Universidad Técnica Federico Santa María, 110 V, Valparaíso, Casilla, Chile.
| | - M Pacheco
- Departamento de Física, Universidad Técnica Federico Santa María, 110 V, Valparaíso, Casilla, Chile
| | - A M Calle
- Departamento de Física, Universidad Técnica Federico Santa María, 110 V, Valparaíso, Casilla, Chile
| | - E C Siqueira
- Departamento Acadêmico de Física, Universidade Tecnológica Federal do Paraná, Curitiba, Brazil
| | - P A Orellana
- Departamento de Física, Universidad Técnica Federico Santa María, 110 V, Valparaíso, Casilla, Chile.
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Marçal R, Pacheco M, Guilherme S. DNA of crayfish spermatozoa as a target of waterborne pesticides - An ex vivo approach as a tool to short-term spermiotoxicity screening. J Hazard Mater 2020; 400:123300. [PMID: 32947705 DOI: 10.1016/j.jhazmat.2020.123300] [Citation(s) in RCA: 12] [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: 02/27/2020] [Revised: 06/18/2020] [Accepted: 06/22/2020] [Indexed: 05/12/2023]
Abstract
The spermiotoxic properties of aquatic contaminants might be the cause of low fertilization rate and decreased prolificacy, affecting the success of the impacted populations. The genotoxic potential of pesticides in spermatozoa as an undesirable effect on non-target organisms, namely aquatic invertebrates with external fertilization, emerges as a key question in ecogenotoxicological research. Thus, this study aimed to clarify if DNA integrity of red swamp crayfish (Procambarus clarkii) spermatozoa is affected by waterborne pesticides at environmentally relevant concentrations. By adopting an ex vivo approach, six pesticides were addressed in a short-term assay: herbicides glyphosate (9 and 90 μg L-1) and penoxsulam (2.3 and 23 μg L-1); insecticides dimethoate (2.4 and 24 μg L-1) and imidacloprid (13.1 and 131 μg L-1); fungicides pyrimethanil (2.2 and 22 μg L-1) and imazalil (16 and 160 μg L-1). Genotoxicity was observed in higher concentrations of glyphosate, penoxsulam, dimethoate, pyrimethanil, and imazalil. Imidacloprid was the only pesticide that did not cause non-specific DNA damage, although displaying pro-oxidant properties. Overall, the present study demonstrated the suitability of the ex vivo approach on spermiotoxicity screening, highlighting the potential ecological impact of pesticides on non-target species, such as P. clarkii, compromising sperm DNA integrity and, subsequently, the population success.
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Affiliation(s)
- R Marçal
- Centre for Environmental and Marine Studies (CESAM), Department of Biology University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal.
| | - M Pacheco
- Centre for Environmental and Marine Studies (CESAM), Department of Biology University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - S Guilherme
- Centre for Environmental and Marine Studies (CESAM), Department of Biology University of Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
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31
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Mieiro CL, Martins M, da Silva M, Coelho JP, Lopes CB, da Silva AA, Alves J, Pereira E, Pardal M, Costa MH, Pacheco M. Advances on assessing nanotoxicity in marine fish - the pros and cons of combining an ex vivo approach and histopathological analysis in gills. Aquat Toxicol 2019; 217:105322. [PMID: 31639587 DOI: 10.1016/j.aquatox.2019.105322] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 07/30/2019] [Revised: 09/30/2019] [Accepted: 09/30/2019] [Indexed: 06/10/2023]
Abstract
The need to overcome logistic and ethical limitations of in vivo nanotoxicity evaluation in marine organisms is essential, mostly when dealing with fish. It is well established that medium/solvent conditions affect dispersion and agglomeration of nanoparticles (NPs), which represents a constraint towards a solid and realistic toxicity appraisal. In this way the pros and cons of an ex vivo approach, using a simplified exposure medium (seawater) and addressing gills histopathology, were explored. The nanotoxic potential of environmentally realistic concentrations of titanium dioxide NPs (TiO2 NPs) was also assessed, disclosing the morpho-functional effects on the gills and the possible uptake/elimination processes. Excised gills of the Senegalese sole (Solea senegalensis) were directly exposed in artificial seawater to 20 and 200 μg L-1 TiO2 NPs, for 2 h and 4 h. Semi-quantitative and quantitative histological analyses were applied. The normal morphology of the gill's epithelia was only slightly altered in the control, reflecting protective mechanisms against the artificiality of the experimental conditions, which, together with the absence of differences in the global histopathological index (Ih), corroborated that the gill's morpho-functional features were not compromised, thereby validating the proposed ex vivo approach. TiO2 NPs induced moderate severity and dissemination of histopathological lesions. After 2 h, a series of compensatory mechanisms occurred in NP treatments, implying an efficient response of the innate defense system (increasing number of goblet cells) and effective osmoregulatory ability (chloride cells proliferation). After 4 h, gills revealed signs of recovery (normalization of the number of chloride and goblet cells; similar Ih), highlighting the tissue viability and effective elimination and/or neutralization of NPs. The uptake of the TiO2 NPs seemed to be favored by the higher particle sizes. Overall, the proposed approach emerged as a high-throughput, reliable, accurate and ethically commendable methodology for nanotoxicity assessment in marine fish.
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Affiliation(s)
- C L Mieiro
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal; Centre for Functional Ecology - CFE, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal.
| | - M Martins
- MARE & Department of Environmental Sciences, Faculty of Sciences and Technology, University Nova of Lisbon, 2829-516 Caparica, Portugal; UCIBIO, REQUIMTE, Department of Chemistry, Faculty of Sciences and Technology, University Nova of Lisbon, 2829-516 Caparica, Portugal
| | - M da Silva
- MARE & Department of Environmental Sciences, Faculty of Sciences and Technology, University Nova of Lisbon, 2829-516 Caparica, Portugal
| | - J P Coelho
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - C B Lopes
- Department of Chemistry & CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
| | - A Alves da Silva
- Centre for Functional Ecology - CFE, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - J Alves
- Centre for Functional Ecology - CFE, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - E Pereira
- Department of Chemistry & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - M Pardal
- Centre for Functional Ecology - CFE, Department of Life Sciences, University of Coimbra, Calçada Martim de Freitas, 3000-456 Coimbra, Portugal
| | - M H Costa
- MARE & Department of Environmental Sciences, Faculty of Sciences and Technology, University Nova of Lisbon, 2829-516 Caparica, Portugal
| | - M Pacheco
- Department of Biology & CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
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32
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Johnson-Mallard V, Jones R, Coffman M, Gauda J, Deming K, Pacheco M, Campbell J. The Robert Wood Johnson Nurse Faculty Scholars Diversity and Inclusion Research. Health Equity 2019; 3:297-303. [PMID: 31289788 PMCID: PMC6608697 DOI: 10.1089/heq.2019.0026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Purpose: The purpose of this research is to deepen the understanding of DEI training and show how scholars across the nation incorporated DEI leadership into academic roles. Faculty and administrators' experiential experience in diversity, equity, and inclusion (DEI) plays a role in the success or failure of DEI training. DEI training at institutes of higher learning should include metrics that examine our bias for invisible and overt support for DEI. Methods: Robert Wood Johnson Foundation Nurse Faculty Scholars (RWJFNFS) were surveyed by The Gauda Group at Grayling. Data were collected from a diverse group of scholars across the nation. An online survey followed by an in-depth phone interview was used to assess participants' roles as leaders in academic nursing, challenges faced by scholars in addressing DEI, and perceived values of undertaking DEI activities. Results: Major themes emerged from the findings. The themes included championing for DEI comes with a personal and professional risk. Greater success was noted when DEI was supported by leadership and included in institutional strategic planning. Conclusion: DEI is important and necessitates commitment from all levels of leadership, faculty, and strategic planning initiatives. DEI training fills an important role and subsidizes leadership effectiveness as it relates to DEI.
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Affiliation(s)
| | - Randy Jones
- University of Virginia School of Nursing, Charlottesville, Virginia
| | - Maren Coffman
- University of North Carolina, School of Nursing, Charlotte, North Carolina
| | | | - Katie Deming
- Urban Institute, Washington, District of Columbia
| | - Mario Pacheco
- Christus St. Vincent Health System, Pojoaque, New Mexico
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Dourado R, Goncalves G, Tavares A, Fontes A, Pacheco M, Melo F, Machado C, Santos E, Ferreira S, Pelicano N, Almeida C, Serena C, Oliveira L, Martins D. P270Cardiac computed tomography after invasive coronary angiography without revascularization. Eur Heart J Cardiovasc Imaging 2019. [DOI: 10.1093/ehjci/jez148.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- R Dourado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - G Goncalves
- Hospital Divino Espirito Santo, USISM, Ponta Delgada, Portugal
| | - A Tavares
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - A Fontes
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - M Pacheco
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - F Melo
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Machado
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - E Santos
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - S Ferreira
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - N Pelicano
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Almeida
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - C Serena
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - L Oliveira
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
| | - D Martins
- Hospital Divino Espirito Santo, Ponta Delgada, Portugal
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Guilherme S, Crespo R, Azevedo D, Marques A, Santos MA, Serradeiro R, Pacheco M. DNA and chromosomal damage in Senegalese sole (Solea senegalensis) as side effects of ozone-based water treatment - Contribution to optimization of fish-farming practices. Comp Biochem Physiol C Toxicol Pharmacol 2019; 219:68-76. [PMID: 30771494 DOI: 10.1016/j.cbpc.2019.02.001] [Citation(s) in RCA: 2] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 01/31/2019] [Accepted: 02/01/2019] [Indexed: 10/27/2022]
Abstract
The progressive growth of aquaculture implicates a dependence on large water amounts, which are submitted to disinfection processes, namely ozonation. Considering the importance of genomic integrity, it is critical to improve the knowledge on ozone-related genotoxic hazard to organisms reared in recirculating aquaculture systems (RAS) applying ozonation. Therefore, genetic damage induced by ozone exposure in the Senegalese sole (Solea senegalensis) was assessed, combining the comet and the erythrocytic nuclear abnormalities (ENA) assays, reflecting different damage levels, i.e. DNA and chromosomal damage, respectively. Fish were subjected to a daily 6-h ozone (0.15 mg L-1) exposure, repeated for 3 consecutive days, simulating a short-term event of overozonation. To assess the temporal impact of the previous event, the progression of damage was evaluated 7 days later, following transference to ozone-free water or to 0.07 mg L-1 ozone, a routinely adopted level in RAS. Both endpoints pointed to the ozone genotoxic potential, displaying DNA oxidation as a possible mechanism of damage. Overall, the present findings pointed out the genotoxic hazard of ozone to fish, highlighting the importance of these types of studies and contributing to improve aquaculture practices, namely in RAS systems. These early genotoxic signals may be a prelude to negative repercussions on fish health, which may affect the aquaculture productivity. The present findings recommend precautions in relation to accidental or intentional overozonation in fish-farming, even when short-term events are considered. The strategies to mitigate the impact of ozonation in S. senegalensis may include a dietary extra supplementation of antioxidants (regularly, or punctually in cases of overozonation).
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Affiliation(s)
- S Guilherme
- Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - R Crespo
- Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
| | - D Azevedo
- Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
| | - A Marques
- Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
| | - M A Santos
- Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
| | - R Serradeiro
- Riasearch, Rua do Farol, N° 131, Torrão do Lameiro, 3880-394 Ovar, Portugal
| | - M Pacheco
- Department of Biology and CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
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35
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Queirós L, Pereira JL, Gonçalves FJ, Pacheco M, Aschner M, Pereira P. Caenorhabditis elegans as a tool for environmental risk assessment: emerging and promising applications for a "nobelized worm". Crit Rev Toxicol 2019; 49:411-429. [PMID: 31268799 PMCID: PMC6823147 DOI: 10.1080/10408444.2019.1626801] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 05/25/2019] [Accepted: 05/30/2019] [Indexed: 02/08/2023]
Abstract
Caenorhabditis elegans has been an invaluable model organism in research fields such as developmental biology and neurobiology. Neurotoxicity is one of the subfields greatly profiting from the C. elegans model within biomedical context, while the corresponding potential of the organism applied to environmental studies is relevant but has been largely underexplored. Within the biomedical scope, the implication of metals and organic chemicals with pesticide activity (hereinafter designated as pesticides) in the etiology of several neurodegenerative diseases has been extensively investigated using this nematode as a primary model organism. Additionally, as a well-known experimental model bearing high sensitivity to different contaminants and representing important functional levels in soil and aquatic ecosystems, C. elegans has high potential to be extensively integrated within Environmental Risk Assessment (ERA) routines. In spite of the recognition of some regulatory agencies, this actual step has yet to be made. The purpose of this review is to discuss the major advantages supporting the inclusion of C. elegans in lower tiers of ERA. Special emphasis was given to its sensitivity to metals and pesticides, which is similar to that of other model organisms commonly used in ERA (e.g. Daphnia magna and Eisenia sp.), and to the large array of endpoints that can be tested with the species, both concerning the aquatic and the soil compartments. The inclusion of C. elegans testing may hence represent a relevant advance in ERA, providing ecologically relevant insights toward improvement of the regulatory capacity for establishing appropriate environmental protection benchmarks.
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Affiliation(s)
- L. Queirós
- Department of Biology and CESAM, University of Aveiro, Aveiro, Portugal
| | - J. L. Pereira
- Department of Biology and CESAM, University of Aveiro, Aveiro, Portugal
| | - F. J.M. Gonçalves
- Department of Biology and CESAM, University of Aveiro, Aveiro, Portugal
| | - M. Pacheco
- Department of Biology and CESAM, University of Aveiro, Aveiro, Portugal
| | - M. Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY, USA
| | - P. Pereira
- Department of Biology and CESAM, University of Aveiro, Aveiro, Portugal
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Pape TB, Rosenow J, Herrold A, Livengood S, Kletzel S, Guernon A, Mallinson T, Bhaumik D, Pacheco M, Patil V, Parrish T, Conneely M. ReEnabling ConsciOus behaViors by Engaging dopamineRgic pathwaYs (RECOVERY). Brain Stimul 2019. [DOI: 10.1016/j.brs.2018.12.849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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Alhadas H, Valadares S, Souza C, Rocha L, Pacheco M, Silva B, Costa D, Mantovani H. PSX-18 Inclusion of physically effective fiber from forage on whole corn based diets for beef cattle and its effects on the intake and digestibilities of dry matter, starch and neutral detergent fiber. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- H Alhadas
- Federal University of Vicosa, Viçosa, Brazil
| | - S Valadares
- Universidade Federal de Vicosa, Viçosa, Brazil
| | - C Souza
- Federal University of Vicosa, Viçosa, Brazil
| | - L Rocha
- Federal University of Vicosa, Viçosa, Brazil
| | - M Pacheco
- Federal University of Vicosa, Viçosa, Brazil
| | - B Silva
- Federal University of Vicosa, Viçosa, Brazil
| | - D Costa
- Federal University of Vicosa, Viçosa, Brazil
| | - H Mantovani
- Federal University of Vicosa, Viçosa, Brazil
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Pacheco M, Jurado-Sánchez B, Escarpa A. Sensitive Monitoring of Enterobacterial Contamination of Food Using Self-Propelled Janus Microsensors. Anal Chem 2018; 90:2912-2917. [PMID: 29376315 DOI: 10.1021/acs.analchem.7b05209] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Food poisoning caused by bacteria is a major cause of disease and death worldwide. Herein we describe the use of Janus micromotors as mobile sensors for the detection of toxins released by enterobacteria as indicators of food contamination. The micromotors are prepared by a Pickering emulsion approach and rely on the simultaneous encapsulation of platinum nanoparticles for enhanced bubble-propulsion and receptor-functionalized quantum dots (QDs) for selective binding with the 3-deoxy-d-manno-oct-2-ulosonic acid target in the endotoxin molecule. Lipopolysaccharides (LPS) from Salmonella enterica were used as target endotoxins, which upon interaction with the QDs induce a rapid quenching of the native fluorescence of the micromotors in a concentration-dependent manner. The micromotor assay can readily detect concentrations as low as 0.07 ng mL-1 of endotoxin, which is far below the level considered toxic to humans (275 μg mL-1). Micromotors have been successfully applied for the detection of Salmonella toxin in food samples in 15 min compared with several hours required by the existing Gold Standard method. Such ultrafast and reliable approach holds considerable promise for food contamination screening while awaiting the results of bacterial cultures in a myriad of food safety and security defense applications.
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Affiliation(s)
- M Pacheco
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala , Alcala de Henares E-28871, Madrid, Spain
| | - B Jurado-Sánchez
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala , Alcala de Henares E-28871, Madrid, Spain.,Chemical Research Institute "Andrés M. del Río", University of Alcala , Alcala de Henares E-28871, Madrid, Spain
| | - A Escarpa
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, University of Alcala , Alcala de Henares E-28871, Madrid, Spain.,Chemical Research Institute "Andrés M. del Río", University of Alcala , Alcala de Henares E-28871, Madrid, Spain
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39
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Castro D, Mieiro CL, Coelho JP, Guilherme S, Marques A, Santos MA, Duarte AC, Pereira E, Pacheco M. Addressing the impact of mercury estuarine contamination in the European eel (Anguilla anguilla L., 1758) - An early diagnosis in glass eel stage based on erythrocytic nuclear morphology. Mar Pollut Bull 2018; 127:733-742. [PMID: 29475718 DOI: 10.1016/j.marpolbul.2017.12.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 09/11/2017] [Revised: 12/01/2017] [Accepted: 12/11/2017] [Indexed: 06/08/2023]
Abstract
The decline of the European eel (Anguilla anguilla L., 1758) population throughout Europe has been partially attributed to pollution. As glass eel estuarine migration may represent a considerable threat, the impact of mercury (Hg) contamination at this stage was evaluated through an in situ experiment (7days). Total Hg (tHg) bioaccumulation was evaluated concomitantly with erythrocytic nuclear morphology alterations: erythrocytic nuclear abnormalities assay (ENA), frequency of immature erythrocytes (IE) and the erythrocytic maturity index (EMI). The ENA results suggested a genotoxic pressure at the most contaminated sites, in line with the tHg increase. The EMI data, together with IE frequency, showed that fish exposed to high levels of Hg exhibited alterations of haematological dynamics, translated into an erythropoiesis increment. Despite the presence of these compensatory mechanisms, the present findings suggest a harmful impact of Hg on genome integrity at this early development stage, potentially affecting eels' condition and ultimately the population sustainability.
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Affiliation(s)
- D Castro
- Department of Chemistry & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
| | - C L Mieiro
- Department of Biology & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - J P Coelho
- Department of Chemistry & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal; Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Rua das Bragas, 289, 4050-123 Porto, Portugal
| | - S Guilherme
- Department of Biology & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
| | - A Marques
- Department of Biology & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
| | - M A Santos
- Department of Biology & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
| | - A C Duarte
- Department of Chemistry & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
| | - E Pereira
- Department of Chemistry & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
| | - M Pacheco
- Department of Biology & CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
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Abstract
Here we present a theoretical study of the optical properties of graphene nanocones tuned by external electric and magnetic fields. We investigate the effects of the size and topology of the carbon nanostructures on the density of states and on the electro- and magneto-absorption of linearly polarized electromagnetic radiation in different nanocone geometries. We find that the electric field induces changes in the electric charge distribution mainly at the cone edges. In the infrared range the absorption coefficient shows a peculiar dependence on the electric field (magnitude and direction) and on the photon polarization for all investigated structures. Our results suggest that the electric field may be used to control the electric charge at the apex and for a selective light absorption. The presence of an axial magnetic field induces new features in the nanocone density of states due to the induced localization effects. For high fields the density of states exhibits a sequence of peaks resembling the graphene Landau spectra. The magneto-absorption spectra present a series of resonances strongly sensitive to the photon polarization opening routes for manipulation of the optical responses.
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Affiliation(s)
- P Ulloa
- Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110-V, Valparaíso, Chile
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41
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Calle AM, Pacheco M, Martins GB, Apel VM, Lara GA, Orellana PA. Fano-Andreev effect in a T-shape double quantum dot in the Kondo regime. J Phys Condens Matter 2017; 29:135301. [PMID: 28075329 DOI: 10.1088/1361-648x/aa58c1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In the present work, we investigate the electronic transport through a T-shape double quantum dot system coupled to two normal leads and to one superconducting lead. We explore the interplay between Kondo and Andreev states due to proximity effects. We find that Kondo resonance is modified by the Andreev bound states, which manifest through Fano antiresonances in the local density of states of the embedded quantum dot and normal transmission. This means that there is a correlation between Andreev bound states and Fano resonances that is robust under the influence of high electronic correlation. We have also found that the dominant couplings at the quantum dots are characterized by a crossover region that defines the range where the Fano-Kondo and the Andreev-Kondo effect prevail in each quantum dot. Likewise, we find that the interaction between Kondo and Andreev bound states has a notable influence on the Andreev transport.
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Affiliation(s)
- A M Calle
- Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110 V, Valparaíso, Chile
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Cortés N, Rosales L, Chico L, Pacheco M, Orellana PA. Enhancement of thermoelectric efficiency by quantum interference effects in trilayer silicene flakes. J Phys Condens Matter 2017; 29:015004. [PMID: 27830655 DOI: 10.1088/0953-8984/29/1/015004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In recent years, the enhancement of thermoelectric efficiencies has been accomplished in nanoscale systems by making use of quantum effects. We exploit the presence of quantum interference phenomena such as bound states in the continuum and Fano antiresonances in trilayer silicene flakes to produce sharp changes in the electronic transmission of the system. By applying symmetric gate voltages the thermoelectric properties can be tuned and, for particular flake lengths, a great enhancement of the figure of merit can be achieved. We show that the most favorable configurations are those in which the electronic transmission is dominated by the coupling of bound states to the continuum, tuned by an external gate.
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Affiliation(s)
- Natalia Cortés
- Departamento de Física, Universidad Técnica Federico Santa María, Casilla 110 V, Valparaíso, Chile
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Sánchez B, Arbós M, Pacheco M, Cerdà M, Quintana S. Análisis del primer, tercer y último ciclos de una secuencia de 2min de maniobras de resucitación cardiopulmonar sobre un maniquí. Med Intensiva 2016; 40:255-6. [DOI: 10.1016/j.medin.2015.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 09/07/2015] [Accepted: 09/15/2015] [Indexed: 12/01/2022]
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Carlton HD, Elmer JW, Li Y, Pacheco M, Goyal D, Parkinson DY, MacDowell AA. Using Synchrotron Radiation Microtomography to Investigate Multi-scale Three-dimensional Microelectronic Packages. J Vis Exp 2016. [PMID: 27167469 DOI: 10.3791/53683] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Synchrotron radiation micro-tomography (SRµT) is a non-destructive three-dimensional (3D) imaging technique that offers high flux for fast data acquisition times with high spatial resolution. In the electronics industry there is serious interest in performing failure analysis on 3D microelectronic packages, many which contain multiple levels of high-density interconnections. Often in tomography there is a trade-off between image resolution and the volume of a sample that can be imaged. This inverse relationship limits the usefulness of conventional computed tomography (CT) systems since a microelectronic package is often large in cross sectional area 100-3,600 mm(2), but has important features on the micron scale. The micro-tomography beamline at the Advanced Light Source (ALS), in Berkeley, CA USA, has a setup which is adaptable and can be tailored to a sample's properties, i.e., density, thickness, etc., with a maximum allowable cross-section of 36 x 36 mm. This setup also has the option of being either monochromatic in the energy range ~7-43 keV or operating with maximum flux in white light mode using a polychromatic beam. Presented here are details of the experimental steps taken to image an entire 16 x 16 mm system within a package, in order to obtain 3D images of the system with a spatial resolution of 8.7 µm all within a scan time of less than 3 min. Also shown are results from packages scanned in different orientations and a sectioned package for higher resolution imaging. In contrast a conventional CT system would take hours to record data with potentially poorer resolution. Indeed, the ratio of field-of-view to throughput time is much higher when using the synchrotron radiation tomography setup. The description below of the experimental setup can be implemented and adapted for use with many other multi-materials.
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Affiliation(s)
- Holly D Carlton
- Materials Engineering Division, Lawrence Livermore National Laboratory;
| | - John W Elmer
- Materials Engineering Division, Lawrence Livermore National Laboratory
| | - Yan Li
- Assembly Test and Technology Development Failure Analysis Labs, Intel Corporation
| | - Mario Pacheco
- Assembly Test and Technology Development Failure Analysis Labs, Intel Corporation
| | - Deepak Goyal
- Assembly Test and Technology Development Failure Analysis Labs, Intel Corporation
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Travassos B, Bourbousson J, Esteves PT, Marcelino R, Pacheco M, Davids K. Adaptive behaviours of attacking futsal teams to opposition defensive formations. Hum Mov Sci 2016; 47:98-105. [PMID: 26918489 DOI: 10.1016/j.humov.2016.02.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 02/08/2016] [Accepted: 02/16/2016] [Indexed: 11/19/2022]
Abstract
This study evaluated tendencies towards flexibility/stability of coordinated behaviours in international futsal teams, considered as complex collective systems, according to changes in opposition defensive formations. Six games of two international futsal teams (Spain and Portugal) were selected for Social Network Analysis to capture the coordination tendencies that emerge in the tactical behaviours of players when performing against different defensive formations. Ball trajectories in each offensive pattern of play were notated in an adjacency matrix where each entry accounted for the linkages between 12 spatial field areas. Each offensive play was coded according to the defensive formation of an opposing team (i.e. conservative or risky formation). Results revealed similar network properties between teams when competing against more risky defensive formations, while notable differences were observed against conservative defences. Effect of defensive formation of opponents on macro network properties was observed in both the Portuguese and Spanish teams. At a meso-level, only the Spanish national team exhibited notable changes, suggesting a greater level of adaptability to unfolding performance events. The observed flexibility in tactical behaviours of the Spanish team appeared to express their greater expertise levels.
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Affiliation(s)
- B Travassos
- Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal; Research Centre in Sports Sciences, Health Sciences and Human Development, CIDESD, CreativeLab Research Community, Portugal.
| | - J Bourbousson
- Sport Sciences Faculty, University of Nantes, France
| | - P T Esteves
- Research Centre in Sports Sciences, Health Sciences and Human Development, CIDESD, CreativeLab Research Community, Portugal; Polytechnic Institute of Guarda, Guarda, Portugal
| | - R Marcelino
- Research Centre in Sports Sciences, Health Sciences and Human Development, CIDESD, CreativeLab Research Community, Portugal
| | - M Pacheco
- Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal
| | - K Davids
- Centre for Sports Engineering Research, Sheffield Hallam University, UK
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Mieiro C, Coelho J, Dolbeth M, Pacheco M, Duarte A, Pardal M, Pereira M. Fish and mercury: Influence of fish fillet culinary practices on human risk. Food Control 2016. [DOI: 10.1016/j.foodcont.2015.09.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sánchez B, Algarte R, Cerdà M, Balanzó X, Giraldo JM, Pacheco M, Ferrer R, Quintana S. Agreement in the assessment of practical skills in basic CPR between observers and a CPR mannequin with a specific software. Intensive Care Med Exp 2015. [PMCID: PMC4798340 DOI: 10.1186/2197-425x-3-s1-a749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Pacheco M, Cuevas A, González-Platas J, Lloret F, Julve M, Kremer C. The crystal structure and magnetic properties of 3-pyridinecarboxylate-bridged Re(II)M(II) complexes (M = Cu, Ni, Co and Mn). Dalton Trans 2015; 44:11636-48. [PMID: 26042855 DOI: 10.1039/c5dt01321f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The novel Re(II) complex NBu4[Re(NO)Br4(Hnic)] (1) and the heterodinuclear compounds [Re(NO)Br4(μ-nic)Ni(dmphen)2]·½CH3CN (2), [Re(NO)Br4(μ-nic)Co(dmphen)2]·½MeOH (3), [Re(NO)Br4(μ-nic)Mn(dmphen)(H2O)2]·dmphen (4), [Re(NO)Br4(μ-nic)Cu(bipy)2] (5) [Re(NO)Br4(μ-nic)Cu(dmphen)2] (5') (NBu4(+) = tetra-n-butylammonium cation, Hnic = 3-pyridinecarboxylic acid, dmphen = 2,9-dimethyl-1,10-phenanthroline, bipy = 2,2'-bipyridine) have been prepared and the structures of 1-5 determined using single crystal X-ray diffraction. The structure of 1 consists of [Re(NO)Br4(Hnic)](-) anions and NBu4(+) cations. Each Re(II) is six-coordinate with four bromide ligands, a linear nitrosyl group and a nitrogen atom from the Hnic molecule, in a distorted octahedral surrounding. The structures of 2-5 are made up of discrete heterodinuclear Re(II)M(II) units where the fully deprotonated [Re(NO)Br4(nic)](2-) entity acts as a didentate ligand through the carboxylate group towards the [Ni(dmphen)2](2+) (2), [Co(dmphen)2](2+) (3), [Mn(dmphen)(H2O)2](2+) (4) and [Cu(bipy)2](2+) (5) fragments, the Re-M separation across the nic bridge being 7.8736(8) (2), 7.9632(10) (3), 7.7600(6) (4) and 8.2148(7) Å (5). The environment of the Re(II) ion in 2-5 is the same as 1 that in and all M(II) are six-coordinate in highly distorted octahedral surroundings, the main source of the distortion being due to the reduced bite of the chelating carboxylate. The magnetic properties of 1-5' were investigated in the temperature range 1.9-300 K. 1 behaves as a quasi-magnetically isolated spin doublet with very weak antiferromagnetic interactions through space Br···Br contacts. Its magnetic susceptibility data were successfully modeled through a deep analysis of the influence of the ligand field, spin-orbit coupling, tetragonal distortion and covalence effects as variable parameters. Compounds 2-5' exhibit weak antiferromagnetic interactions. The intramolecular exchange pathway in this family being discarded because of the symmetry of magnetic orbitals of the Re(II) ion (d(xy)) precludes any spin delocalization on the bridging nic orbitals, the observed magnetic interactions are most likely mediated by π-π type interactions between the peripheral ligands which occur in them. Only in the case of 4, short through space Br···Br contacts of ca. 4.03 Å (values larger than 5.5 Å in 2, 3 and 5) could be involved in the exchange coupling.
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Affiliation(s)
- Mario Pacheco
- Cátedra de Química Inorgánica, Departamento Estrella Campos, Facultad de Química, Universidad de la República, Avda. General Flores 2124, Montevideo, Uruguay
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Pacheco M, Sciani J, Morais K, Andrade S, Chudzinski‐Tavassi AM. Dynein Activity Induced by a Kunitz‐type Molecule Acting on the Proteasome. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.lb196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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