Andrzej Wittczak

Mr. Andrzej Wittczak

orcid

Research Focus & Metrics

Academic Career Length

7Years (2020-Present)

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

Representative Publications

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Journal Article
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RFRafał Frankowski
Rafał Frankowski
MKMateusz Kobierecki
Mateusz Kobierecki
AWAndrzej Wittczak
Andrzej Wittczak
Monika Różycka-KosmalskaMonika Różycka-Kosmalska
Monika Różycka-Kosmalska
TPTadeusz Pietras
Tadeusz Pietras
Marcin KosmalskiMarcin Kosmalski
Marcin Kosmalski
The prevalence of metabolic-related disorders, such as non-alcoholic fatty liver disease (NAFLD) and type 2 diabetes mellitus (DM2), has been increasing. Therefore, developing improved methods for the prevention, treatment, and detection of these two conditions is also necessary. In this study, our primary focus was on examining the role of chronic inflammation as a potential link in the pathogenesis of these diseases and their interconnections. A comprehensive search of the PubMed database using keywords such as “non-alcoholic fatty liver disease”, “type 2 diabetes mellitus”, “chronic inflammation”, “pathogenesis”, and “progression” yielded 177 relevant papers for our analysis. The findings of our study revealed intricate relationships between the pathogenesis of NAFLD and DM2, emphasizing the crucial role of inflammatory processes. These connections involve various molecular functions, including altered signaling pathways, patterns of gene methylation, the expression of related peptides, and up- and downregulation of several genes. Our study is a foundational platform for future research into the intricate relationship between NAFLD and DM2, allowing for a better understanding of the underlying mechanisms and the potential for introducing new treatment standards.

30 September 2023 in Biomedicines
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AWAndrzej Wittczak
Andrzej Wittczak
MŚMaciej Ślot
Maciej Ślot
Agata Bielecka-DabrowaAgata Bielecka-Dabrowa
Agata Bielecka-Dabrowa
Heart failure (HF) is a leading cause of morbidity and mortality and a major public health problem. Both overhydration and dehydration are non-physiological states of the body that can adversely affect human health. Congestion and residual congestion are common in patients hospitalized for HF and are associated with poor prognosis and high rates of rehospitalization. However, the clinical problem of dehydration is also prevalent in healthcare and community settings and is associated with increased morbidity and mortality. This article provides a comprehensive review of the issue of congestion and dehydration in HF, including HF guidelines, possible causes of dehydration in HF, confirmed and potential new diagnostic methods. In particular, a full database search on the relationship between dehydration and HF was performed and all available evidence in the literature was reviewed. The novel hypothesis of chronic subclinical hypohydration as a modifiable risk factor for HF is also discussed. It is concluded that maintaining euvolemia is the cornerstone of HF management. Physicians have to find a balance between decongestion therapy and the risk of dehydration.

9 June 2023 in Archives of Medical Science
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Agata Bielecka-DabrowaAgata Bielecka-Dabrowa
Agata Bielecka-Dabrowa
Maciej BanachMaciej Banach
Maciej Banach
AWAndrzej Wittczak
Andrzej Wittczak
Arrigo CiceroArrigo Cicero
Arrigo Cicero
AKAmani Kallel
Amani Kallel
Stephan Von HaehlingStephan Von Haehling
Stephan Von Haehling
Muscle wasting is one of the main causes for exercise intolerance and ventilatory inefficiency in patients with heart failure and a strong predictor of frailty and reduced survival. The prevalence of sarcopenia is at least 20% in patients with heart failure. Patients with heart failure often have...

14 January 2025 in Journal of Clinical Medicine
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AWAndrzej Wittczak
Andrzej Wittczak
AMAnna Mazurek-Kula
Anna Mazurek-Kula
Maciej BanachMaciej Banach
Maciej Banach
GPGrzegorz Piotrowski
Grzegorz Piotrowski
Agata Bielecka-DabrowaAgata Bielecka-Dabrowa
Agata Bielecka-Dabrowa
The Fontan operation has become the primary palliative treatment for patients with a functionally univentricular heart. The population of patients with Fontan circulation is constantly growing and aging. As the number of Fontan patients surviving into adulthood increases, there is a clear need for research on how best to follow these patients and manage their complications. Monitoring blood biomarkers is a promising method for the non-invasive assessment of the Fontan circulation. In this article, we provide a comprehensive review of the available evidence on this topic. The following biomarkers were included: natriuretic peptides, red blood cell distribution width (RDW), cystatin C, high-sensitivity C-reactive protein, vitamin D, parathyroid hormone, von Willebrand factor, carbohydrate antigen 125, lipoproteins, hepatocyte growth factor, troponins, ST2 protein, galectin-3, adrenomedullin, endothelin-1, components of the renin–angiotensin–aldosterone system, norepinephrine, interleukin 6, tumor necrosis factor α, and uric acid. We did not find strong enough data to propose evidence-based recommendations. Nevertheless, significantly elevated levels of brain natriuretic peptide (BNP)/N-terminal prohormone of BNP (NT-proBNP) are most likely associated with the failure of the Fontan circulation. The use of the RDW is also promising. Several biomarkers appear to be useful in certain clinical presentations. Certainly, robust longitudinal, preferably multicenter, prospective studies are needed to determine the sensitivity, specificity, evidence-based cut-off values and overall predictive value of different biomarkers in monitoring Fontan physiology.

1 March 2021 in Journal of Multidisciplinary Healthcare
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Agata Bielecka-DabrowaAgata Bielecka-Dabrowa
Agata Bielecka-Dabrowa
PGPaulina Gąsiorek
Paulina Gąsiorek
AWAndrzej Wittczak
Andrzej Wittczak
ASAgata M. Sakowicz
Agata M. Sakowicz
Ibadete BytyçiIbadete Bytyçi
Ibadete Bytyçi
Maciej BanachMaciej Banach
Maciej Banach
Objective: Identification of echocardiographic, hemodynamic and biochemical predictors of unfavorable prognosis after embolic strokes of undetermined etiology (ESUS) in patients at age < 65. Patients and Methods: Out of 520 ischemic stroke patients we selected 64 diagnosed with ESUS and additional 36 without stroke but with similar risk profile. All patients underwent echocardiography, non-invasive assessment of hemodynamic parameters using SphygmoCor tonometer and measurements of selected biomarkers. Follow-up time was 12 months. Results: Nine percent of patients died, and recurrent ischemic stroke occurred in 9% of patients only in the ESUS group. Atrial fibrillation (AF) occurred in 10% of patients and the ESUS group had a significantly poorer outcome of AF in the first 2 months after hospitalization. The outcome of re-hospitalization was 28% in the ESUS group and 17% in the control group. In the multivariate analysis mean early diastolic (E’) mitral annular velocity (OR 0.75, 95% CI: 0.6– 0.94; p=0.01) was significantly associated with cardiovascular hospitalizations. The only independent predictor of recurrent stroke was the ratio of peak velocity of early diastolic transmitral flow to peak velocity of early diastolic mitral annular motion (E/E’) (OR 0.75, 95% CI: 0.6– 0.94; p=0.01). E/E’ was independently associated with composite endpoint (death, hospitalization and recurrent stroke) (OR 1.90, 95% CI 1.1– 3.2, p=0.01). Conclusion: The indices of diastolic dysfunction are significantly associated with unfavorable prognosis after ESUS. There is a robust role for outpatient cardiac monitoring especially during the first 2 months after ESUS to detect potential AF.

3 May 2023 in Clinical Case Reports
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AWAndrzej Wittczak
Andrzej Wittczak
PDPaweł Dryżek
Paweł Dryżek
MMMarek Maciejewski
Marek Maciejewski
AKAnna Kula‐Mazurek
Anna Kula‐Mazurek
TMTomasz Moszura
Tomasz Moszura
Agata Bielecka-DabrowaAgata Bielecka-Dabrowa
Agata Bielecka-Dabrowa
We report the case of a successful complex percutaneous intervention in a patient with Fontan circulation and severe heart failure. The patient presented with cyanosis; Fontan conduit stenosis was detected, and the fenestration was patent. The complex interventional procedure allowed for a long‐term stabilization of the patient's condition.