Irmgardt A. Wellmann

Dr. Irmgardt A. Wellmann

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Research Focus & Metrics

Academic Career Length

11Years (2016-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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9 January 2025 in Global Heart
Verified
Journal Article
Open access
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ARAndres Rosende
Andres Rosende
CRCesar Romero
Cesar Romero
DDDonald J. DiPette
Donald J. DiPette
JBJeffrey Brettler
Jeffrey Brettler
PSPatrick Van der Stuyft
Patrick Van der Stuyft
POPedro Ordunez
Pedro Ordunez
Background: HEARTS in the Americas is the regional adaptation of the WHO Global HEARTS Initiative, aimed at helping countries enhance hypertension and cardiovascular disease (CVD) risk management in primary care settings. Its core implementation tool, the HEARTS Clinical Pathway, has been adopted by 28 countries. To improve the care of hypertension, diabetes, and chronic kidney disease (CKD), HEARTS 2.0 was developed as a three-phase process to integrate evidence-based interventions into a unified care pathway, ensuring consistency across fragmented guidelines. This paper focuses on Phase 1, highlighting targeted interventions to improve and update the HEARTS Clinical Pathway. Methods: First, the coordinating group defined the project’s scope, objectives, principles, methodological framework, and tools. Second, international experts from different disciplines proposed interventions to enhance the HEARTS Clinical Pathway. Third, the coordinating group harmonized these proposals into unique interventions. Fourth, experts appraised the appropriateness of the proposed interventions on a 1-to-9 scale using the adapted RAND/UCLA Appropriateness Method. Finally, interventions with a median score above 6 were deemed appropriate and selected as candidates to enhance the HEARTS Clinical Pathway. Results: Building on the existing HEARTS Clinical Pathway, 45 unique interventions were selected, including community-based screening, early detection and management of risk factors, lower blood pressure thresholds for diagnosing hypertension in high-CVD-risk patients, reinforcement of single-pill combination therapy, inclusion of sodium-glucose cotransporter-2 inhibitors for patients with diabetes, CKD, or heart failure, expanded roles for non-physician health workers in team-based care, and strengthened clinical documentation, monitoring, and evaluation. Conclusion: HEARTS 2.0 Phase 1 identifies key interventions to integrate and improve hypertension and cardiovascular-kidney-metabolic care within primary care, enabling their seamless incorporation into a unified and effective clinical pathway. This process will inform an update to the HEARTS Clinical Pathway, optimizing resources, reducing care fragmentation, improving care delivery, and advancing health equity, thereby supporting global efforts to combat the leading causes of death and disability.

18 August 2020 in Frontiers in Immunology
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Journal Article
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IWIrmgardt A. Wellmann
Irmgardt A. Wellmann
HIHiochelson Najibe Santos Ibiapina
Hiochelson Najibe Santos Ibiapina
JSJacqueline Almeida Gonçalves Sachett
Jacqueline Almeida Gonçalves Sachett
MSMarco Aurélio Sartim
Marco Aurélio Sartim
ISIran Mendonça Silva
Iran Mendonça Silva
ACAllyson Guimarães Costa
Allyson Guimarães Costa
Snakebites are considered a major public health problem worldwide. In the Amazon region of Brazil, the snake Bothrops atrox (B. atrox) is responsible for 90% of the bites. These bites may cause local and systemic signs from acute inflammatory reaction and hemostatic changes, and present common hemorrhagic disorders. These alterations occur due the action of hemostatically active and immunogenic toxins which are capable of triggering a wide range of hemostatic and inflammatory events. However, the crosstalk between coagulation disorders and inflammatory reaction still has gaps in snakebites. Thus, the goal of this study was to describe the relationship between the consumption of fibrinogen and the profile of inflammatory molecules (chemokines and cytokines) in evenomations by B. atrox snakebites. A prospective study was carried out with individuals who had suffered B. atrox snakebites and presented different levels of fibrinogen consumption (normal fibrinogen [NF] and hypofibrinogenemia [HF]). Seventeen patients with NF and 55 patients with HF were eligible for the study, in addition to 50 healthy controls (CG). The molecules CXCL-8, CCL-5, CXCL-9, CCL-2, CXCL-10, IL-6, TNF, IL-2, IL-10, IFN-γ, IL-4, and IL-17A were quantified in plasma using the CBA technique at three different times (pre-antivenom therapy [T0], 24 h [T1], and 48 h [T2] after antivenom therapy). The profile of the circulating inflammatory response is different between the groups studied, with HF patients having higher concentrations of CCL-5 and lower IFN-γ. In addition, antivenom therapy seems to have a positive effect, leading to a profile of circulating inflammatory response similar in quantification of T1 and T2 on both groups. Furthermore, these results suggest that a number of interactions of CXCL-8, CXCL-9, CCL-2, IL-6, and IFN-γ in HF patients are directly affected by fibrinogen levels, which may be related to the inflammatory response and coagulation mutual relationship induced by B. atrox venom. The present study is the first report on inflammation-coagulation crosstalk involving snakebite patients and supports the better understanding of envenomation's pathophysiology mechanisms and guides in the search for novel biomarkers and prospective therapies.

12 May 2025 in Revista Panamericana de Salud Pública
Verified
Journal Article
Open access
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VIVilma Irazola
Vilma Irazola
CPCarolina Prado
Carolina Prado
ARAndres Rosende
Andres Rosende
DFDavid Flood
David Flood
RTRoss Tsuyuki
Ross Tsuyuki
POPedro Ordunez
Pedro Ordunez
Cardiovascular diseases remain the leading cause of premature morbidity and mortality globally, with hypertension as their main modifiable risk factor. In Latin America and the Caribbean, hypertension affects more than 30% of adults, yet control rates remain alarmingly low. The HEARTS in the Americas Initiative, led by the Pan American Health Organization, promotes a model of team-based care to enhance risk management for hypertension and cardiovascular diseases within primary health care. Team-based care leverages the skills of diverse health professionals, including nurses, pharmacists and community health workers, to optimize resource allocation, task-sharing and care delivery. Evidence underscores the effectiveness of team-based care in improving blood pressure control, reducing hospitalizations and enhancing quality of life through strategies such as periodic follow up and medication titration. Despite its benefits, implementing team-based care faces cultural and systemic barriers. This special report outlines a policy framework to scale team-based care across the Region of the Americas, ensuring equitable access to high-quality, cost-effective prevention and care for cardiovascular diseases.

9 January 2025 in Global Heart
Verified
Journal Article
Open access
PDF file
IWIrmgardt A. Wellmann
Irmgardt A. Wellmann
LALuis Fernando Ayala
Luis Fernando Ayala
TVTaryn M. Valley
Taryn M. Valley
VIVilma Irazola
Vilma Irazola
MHMark D Huffman
Mark D Huffman
DFDavid Flood
David Flood
Background: The World Health Organization HEARTS Technical Package is a widely implemented global initiative to improve the primary care management of cardiovascular disease risk factors. The study’s objective is to report outcomes from a pilot implementation trial of integrated hypertension and diabetes management based on the HEARTS model in Guatemala. Methods: We conducted a single-arm pilot implementation trial over six months from October 2023 to May 2024 in 11 Guatemalan Ministry of Health primary care facilities in two districts. The pilot evaluated a package of five HEARTS-aligned implementation strategies to improve the pharmacological treatment of hypertension and diabetes. The primary outcomes were feasibility and acceptability, measured through 20 structured interviews with Ministry of Health employees and by examining enrolment and retention data. Secondary outcomes included a suite of implementation and clinical outcomes, including treatment rates. When baseline data were available, we analyzed secondary outcomes as the net change from baseline or using an interrupted time series approach. Results: The study enrolled 964 patients, of whom 58.8% had hypertension only, 30.4% had diabetes only, and 10.8% had both conditions. Surveys on feasibility and acceptability among Ministry of Health staff had a median score of 5.0 (IQR: 5.0 to 5.0) and 5.0 (IQR range: 4.8 to 5.0), respectively, exceeding the prespecified benchmark of ≥3.5. Both districts achieved the prespecified benchmark of enrolling ≥25 hypertension patients and ≥25 diabetes patients. Only 36% of patients attended a follow-up visit within three months, lower than the prespecified benchmark of ≥75%. Monthly treatment rates during the pilot increased by 22.3 (95% CI: 16.2 to 28.4; P < 0.001) and 3.5 (95% CI: –1.6 to 8.7; P = 0.17) patients per month for hypertension and diabetes, respectively. Conclusions: Implementation of an integrated hypertension and diabetes model based on HEARTS was generally feasible and acceptable in the Ministry of Health in Guatemala. Findings can refine national scale-up in Guatemala and inform HEARTS implementation projects in other settings.

4 March 2023 in Toxins
Verified
Journal Article
Open access
PDF file
KCKerolaine Fonseca Coelho
Kerolaine Fonseca Coelho
JNJuliana Costa Ferreira Neves
Juliana Costa Ferreira Neves
HIHiochelson Najibe Santos Ibiapina
Hiochelson Najibe Santos Ibiapina
FMFábio Magalhães-Gama
Fábio Magalhães-Gama
FBFabiane Bianca Albuquerque Barbosa
Fabiane Bianca Albuquerque Barbosa
ACAllyson Guimarães Costa
Allyson Guimarães Costa
Bothrops atrox envenomations are common in the Brazilian Amazon. The venom of B. atrox is highly inflammatory, which results in severe local complications, including the formation of blisters. Moreover, there is little information on the immune mechanisms associated with this condition. Thus, a longitudinal study was carried out to characterize the profile of the cell populations and soluble immunological mediators in the peripheral blood and blisters in B. atrox patients s according to their clinical manifestations (mild and severe). A similar response in both B. atrox patient groups (MILD and SEV) was observed, with an increase in inflammatory monocytes, NKT, and T and B cells, as well as CCL2, CCL5, CXCL9, CXCL10, IL-1β and IL-10, when compared with the group of healthy blood donors. After the administration of antivenom, the participation of patrolling monocytes and IL-10 in the MILD group was observed. In the SEV group, the participation of B cells was observed, with high levels of CCL2 and IL-6. In the blister exudate, a hyperinflammatory profile was observed. In conclusion, we revealed the involvement of cell populations and soluble mediators in the immune response to B. atrox envenomation at the local and peripheral level, which is related to the onset and extent of the inflammation/clinical manifestation.

1 July 2020 in The American Journal of Tropical Medicine and Hygiene
Verified
Journal Article
Closed access
RFRafael Fernandez-Botran
Rafael Fernandez-Botran
IWIrmgardt A. Wellmann
Irmgardt A. Wellmann
CUClas Une
Clas Une
EMEricka Méndez-Chacón
Ericka Méndez-Chacón
ERElisa Hernández de Rodas
Elisa Hernández de Rodas
CTCarmen I. Villagrán de Tercero
Carmen I. Villagrán de Tercero
Infection by Helicobacter pylori is a major risk factor for gastric cancer (GC), the second leading cause of cancer-related death worldwide. Although biomarkers such as pepsinogens (PGs) and soluble urokinase plasminogen activator receptor (suPAR) may have diagnostic and/or prognostic value in patients with GC, their levels may be affected by H. pylori infection. The aim of this study was to investigate the association of the presence of antibodies to H. pylori and cytotoxin-associated gene A (CagA) with plasma levels of PGs and suPAR in a cohort of Guatemalan GC patients and controls. To this end, levels of suPAR, Pepsinogens I and II (PGI and PGII), and antibodies to H. pylori and CagA toxin were determined by ELISA in plasma samples from 67 GC patients and 136 matched healthy controls. Seropositivity for CagA was significantly higher in patients with GC than in controls. Pepsinogens II and suPAR levels were higher and PGI/PGII ratios were lower in GC patients than in controls. There was a significant association of H. pylori seropositivity status with increased levels of PGII and lower PGI/PGII ratios, particularly in the control (non-GC) population. The levels of suPAR were not significantly affected by H. pylori or CagA seropositivity status. These results suggest that the seropositivity status for H. pylori and CagA need to be taken into account during the GC diagnostic process.