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  1. Article ; Online: Sudden Cardiac Death, Not What You Thought.

    Teodorovich, Nicholay / Mikhaylov, Evgeny N / Mitrofanova, Lubov B / Swissa, Moshe

    Cardiology

    2022  Volume 147, Issue 3, Page(s) 335–336

    MeSH term(s) Cause of Death ; Death, Sudden, Cardiac/etiology ; Humans ; Incidence ; Risk Factors
    Language English
    Publishing date 2022-03-28
    Publishing country Switzerland
    Document type Journal Article ; Comment
    ZDB-ID 80092-2
    ISSN 1421-9751 ; 0008-6312
    ISSN (online) 1421-9751
    ISSN 0008-6312
    DOI 10.1159/000524314
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: CrossU-Net: Dual-modality cross-attention U-Net for segmentation of precancerous lesions in gastric cancer.

    Wang, Jiansheng / Zhang, Benyan / Wang, Yan / Zhou, Chunhua / Vonsky, Maxim S / Mitrofanova, Lubov B / Zou, Duowu / Li, Qingli

    Computerized medical imaging and graphics : the official journal of the Computerized Medical Imaging Society

    2024  Volume 112, Page(s) 102339

    Abstract: Gastric precancerous lesions (GPL) significantly elevate the risk of gastric cancer, and precise diagnosis and timely intervention are critical for patient survival. Due to the elusive pathological features of precancerous lesions, the early detection ... ...

    Abstract Gastric precancerous lesions (GPL) significantly elevate the risk of gastric cancer, and precise diagnosis and timely intervention are critical for patient survival. Due to the elusive pathological features of precancerous lesions, the early detection rate is less than 10%, which hinders lesion localization and diagnosis. In this paper, we provide a GPL pathological dataset and propose a novel method for improving the segmentation accuracy on a limited-scale dataset, namely RGB and Hyperspectral dual-modal pathological image Cross-attention U-Net (CrossU-Net). Specifically, we present a self-supervised pre-training model for hyperspectral images to serve downstream segmentation tasks. Secondly, we design a dual-stream U-Net-based network to extract features from different modal images. To promote information exchange between spatial information in RGB images and spectral information in hyperspectral images, we customize the cross-attention mechanism between the two networks. Furthermore, we use an intermediate agent in this mechanism to improve computational efficiency. Finally, we add a distillation loss to align predicted results for both branches, improving network generalization. Experimental results show that our CrossU-Net achieves accuracy and Dice of 96.53% and 91.62%, respectively, for GPL lesion segmentation, providing a promising spectral research approach for the localization and subsequent quantitative analysis of pathological features in early diagnosis.
    MeSH term(s) Humans ; Stomach Neoplasms/diagnostic imaging ; Precancerous Conditions/diagnostic imaging ; Image Processing, Computer-Assisted
    Language English
    Publishing date 2024-01-19
    Publishing country United States
    Document type Journal Article
    ZDB-ID 639451-6
    ISSN 1879-0771 ; 0895-6111
    ISSN (online) 1879-0771
    ISSN 0895-6111
    DOI 10.1016/j.compmedimag.2024.102339
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Unsupervised domain adaptation for histopathology image segmentation with incomplete labels.

    Zhou, Huihui / Wang, Yan / Zhang, Benyan / Zhou, Chunhua / Vonsky, Maxim S / Mitrofanova, Lubov B / Zou, Duowu / Li, Qingli

    Computers in biology and medicine

    2024  Volume 171, Page(s) 108226

    Abstract: Stain variations pose a major challenge to deep learning segmentation algorithms in histopathology images. Current unsupervised domain adaptation methods show promise in improving model generalization across diverse staining appearances but demand ... ...

    Abstract Stain variations pose a major challenge to deep learning segmentation algorithms in histopathology images. Current unsupervised domain adaptation methods show promise in improving model generalization across diverse staining appearances but demand abundant accurately labeled source domain data. This paper assumes a novel scenario, namely, unsupervised domain adaptation based segmentation task with incompletely labeled source data. This paper propose a Stain-Adaptive Segmentation Network with Incomplete Labels (SASN-IL). Specifically, the algorithm consists of two stages. The first stage is an incomplete label correction stage, involving reliable model selection and label correction to rectify false-negative regions in incomplete labels. The second stage is the unsupervised domain adaptation stage, achieving segmentation on the target domain. In this stage, we introduce an adaptive stain transformation module, which adjusts the degree of transformation based on segmentation performance. We evaluate our method on a gastric cancer dataset, demonstrating significant improvements, with a 10.01% increase in Dice coefficient compared to the baseline and competitive performance relative to existing methods.
    MeSH term(s) Humans ; Algorithms ; Staining and Labeling ; Stomach Neoplasms ; Image Processing, Computer-Assisted
    Language English
    Publishing date 2024-02-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 127557-4
    ISSN 1879-0534 ; 0010-4825
    ISSN (online) 1879-0534
    ISSN 0010-4825
    DOI 10.1016/j.compbiomed.2024.108226
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  4. Article: EUS-FNA biopsy of parathyroid gland.

    Solonitsyn, Evgeny G / Danilov, Ivan N / Poddymova, Anna V / Ivaniha, Elena V / Mitrofanova, Lubov B

    Endoscopic ultrasound

    2021  Volume 10, Issue 4, Page(s) 315–316

    Language English
    Publishing date 2021-03-05
    Publishing country China
    Document type Letter
    ZDB-ID 2998317-4
    ISSN 2226-7190 ; 2303-9027
    ISSN (online) 2226-7190
    ISSN 2303-9027
    DOI 10.4103/EUS-D-20-00215
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Laser renal denervation: A comprehensive evaluation of microstructural renal artery lesions.

    Vakhrushev, Aleksandr D / Condori Leandro, Heber Ivan / Goncharova, Natalia S / Korobchenko, Lev E / Mitrofanova, Lubov B / Makarov, Igor A / Andreeva, Elizaveta M / Lebedev, Dmitry S / Mikhaylov, Evgeny N

    Anatomical record (Hoboken, N.J. : 2007)

    2022  Volume 306, Issue 9, Page(s) 2378–2387

    Abstract: Renal artery denervation (RDN) has been proposed for resistant arterial hypertension. Beyond conventional radiofrequency (RF) ablation, there are emerging RDN technologies, including laser catheter ablation. We aimed at evaluamting the local effects of ... ...

    Abstract Renal artery denervation (RDN) has been proposed for resistant arterial hypertension. Beyond conventional radiofrequency (RF) ablation, there are emerging RDN technologies, including laser catheter ablation. We aimed at evaluamting the local effects of laser ablation on the renal artery and perivascular nerve injury in comparison with radiofrequency ablation. Thirteen pigs (mean weight 36.7 ± 4.7 kg, age 3 months) were divided into three groups: (1) laser ablation in normotensive pigs (LA; n = 3), (2) bipolar RF ablation in normotensive pigs (RF; n = 7), and (3) a sham group (SHAM; n = 3). Transcatheter laser and RF ablations were performed under general anesthesia. After euthanasia, pathology and immunohistochemical studies were performed. Artery wall and perivascular nerve lesions were found in the LA and RF groups. A lower rate of intimal microdissections was evaluated after laser ablation when compared with RF ablation (0 vs. 1.5 [1;2.75] per artery; p < .05). There was a numerical prevalence of nerves with tyrosine hydroxylase expression loss after laser RDN when compared with RF ablation (16.7 [4; 18] vs. 9.1 [0;18] per specimen). Laser ablation is noninferior to RF ablation regarding perivascular nerve injury and is associated with less intimal layer damage.
    MeSH term(s) Swine ; Animals ; Renal Artery/surgery ; Sympathectomy ; Kidney/metabolism ; Hypertension ; Lasers ; Denervation
    Language English
    Publishing date 2022-09-29
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2269667-2
    ISSN 1932-8494 ; 1932-8486
    ISSN (online) 1932-8494
    ISSN 1932-8486
    DOI 10.1002/ar.25068
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Telocytes in the human sinoatrial node.

    Mitrofanova, Lubov B / Gorshkov, Andrey N / Konovalov, Petr V / Krylova, Julia S

    Journal of cellular and molecular medicine

    2017  Volume 22, Issue 1, Page(s) 521–532

    Abstract: The sinoatrial node (SAN) is composed mostly of pacemaker, transitional and Purkinje-like cells. Pacemaker cells, especially in the centre of the SAN, are surrounded by dense fibrous tissue and do not have any contact with transitional cells. We ... ...

    Abstract The sinoatrial node (SAN) is composed mostly of pacemaker, transitional and Purkinje-like cells. Pacemaker cells, especially in the centre of the SAN, are surrounded by dense fibrous tissue and do not have any contact with transitional cells. We hypothesize that the SAN contains telocytes that have contacts with pacemaker cells and contractile myocardium. Immunohistochemistry using antibodies against HCN4 and antibody combinations against CD34 and HCN4 was carried out on 12 specimens. Confocal laser scanning microscopy (CLSM) with two mixtures of primary antibodies, namely CD34/S100 and vimentin/S100, was performed in three cases. In two cases, CLSM was carried out with CD117 antibody. Specimens for electron microscopy and immunocytochemistry with HCN4 immunogold labelling were taken from another three patients. In our study, we found cells with the immunophenotype of telocytes in the SAN. There were twice as many of these cells in the centre of the SAN as in the periphery (20.3 ± 4.8 versus 10.8 ± 4.4 per high-power field). They had close contact with pacemaker cells and contractile cardiomyocytes and expressed HCN4. The ultrastructural characteristics of these cells are identical to those of telocytes observed earlier in other organs. Our study provides evidence that telocytes are present in the SAN.
    MeSH term(s) Adult ; Aged ; Extracellular Vesicles/metabolism ; Extracellular Vesicles/ultrastructure ; Female ; Humans ; Male ; Middle Aged ; Sinoatrial Node/cytology ; Sinoatrial Node/ultrastructure ; Telocytes/cytology ; Telocytes/ultrastructure
    Language English
    Publishing date 2017-11-17
    Publishing country England
    Document type Journal Article
    ZDB-ID 2074559-X
    ISSN 1582-4934 ; 1582-4934 ; 1582-1838
    ISSN (online) 1582-4934
    ISSN 1582-4934 ; 1582-1838
    DOI 10.1111/jcmm.13340
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  7. Article ; Online: Extended Renal Artery Denervation Is Associated with Artery Wall Lesions and Acute Systemic and Pulmonary Hemodynamic Changes: A Sham-Controlled Experimental Study.

    Vakhrushev, Aleksandr D / Condori Leandro, Heber Ivan / Goncharova, Natalia S / Korobchenko, Lev E / Mitrofanova, Lubov B / Lebedev, Dmitry S / Mikhaylov, Evgeny N

    Cardiovascular therapeutics

    2020  Volume 2020, Page(s) 8859663

    Abstract: Objectives: We sought to assess acute changes in systemic and pulmonary hemodynamics and microscopic artery lesions following extended renal artery denervation (RDN).: Background: RDN has been proposed to reduce sympathetic nervous system ... ...

    Abstract Objectives: We sought to assess acute changes in systemic and pulmonary hemodynamics and microscopic artery lesions following extended renal artery denervation (RDN).
    Background: RDN has been proposed to reduce sympathetic nervous system hyperactivation. Although the effects of RDN on systemic circulation and overall sympathetic activity have been studied, data on the impact of RDN on pulmonary hemodynamics is lacking.
    Methods: The study comprised 13 normotensive Landrace pigs. After randomization, 7 animals were allocated to the group of bilateral RDN and 6 animals to the group of a sham procedure (SHAM). Hemodynamic measures, cannulation, and balloon-based occlusion of the renal arteries were performed in both groups. In the RDN group, radiofrequency ablation was performed in all available arteries and their segments. An autopsy study of the renal arteries was carried out in both groups.
    Results: The analysis was performed on 12 pigs (6 in either group) since pulmonary thromboembolism occurred in one case. A statistically significant drop in the mean diastolic pulmonary artery pressure (PAP) was detected in the RDN group when compared with the SHAM group (change by 13.0 ± 4.4 and 10.0 ± 3.0 mmHg, correspondingly;
    Conclusions: Extensive RDN leads to a rapid and significant decrease in PAP. In the majority of cases, RDN is associated with an acute lowering of systolic blood pressure and PVR. Extended RDN is associated with artery wall lesions and thrombus formation underdiagnosed by angiography.
    MeSH term(s) Animals ; Arterial Pressure ; Catheter Ablation/adverse effects ; Hemodynamics ; Pulmonary Artery/physiopathology ; Renal Artery/innervation ; Renal Artery/pathology ; Renal Artery/physiopathology ; Sus scrofa ; Sympathectomy/adverse effects ; Thrombosis/etiology ; Thrombosis/pathology ; Thrombosis/physiopathology ; Vascular Resistance
    Language English
    Publishing date 2020-10-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 2428378-2
    ISSN 1755-5922 ; 1755-5914
    ISSN (online) 1755-5922
    ISSN 1755-5914
    DOI 10.1155/2020/8859663
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: An Ovine Model for Percutaneous Pulmonary Artery Laser Denervation: Perivascular Innervation and Ablation Lesion Characteristics.

    Condori Leandro, Heber Ivan / Koshevaya, Elena G / Mitrofanova, Lubov B / Vakhrushev, Aleksandr D / Goncharova, Natalia S / Korobchenko, Lev E / Andreeva, Elizaveta M / Lebedev, Dmitry S / Mikhaylov, Evgeny N

    International journal of molecular sciences

    2021  Volume 22, Issue 16

    Abstract: Background: Pulmonary artery denervation (PADN) is an evolving interventional procedure capable to reduce pulmonary artery (PA) pressure. We aimed to compare PA nerve distribution in different specimens and assess the feasibility of an ovine model for a ...

    Abstract Background: Pulmonary artery denervation (PADN) is an evolving interventional procedure capable to reduce pulmonary artery (PA) pressure. We aimed to compare PA nerve distribution in different specimens and assess the feasibility of an ovine model for a denervation procedure and evaluate the acute changes induced by laser energy.
    Methods: The experiment was divided into two phases: (1) the analysis of PA nerve distribution in sheep, pigs, and humans using histological and immunochemical methods; (2) fiberoptic PADN in sheep and postmortem laser lesion characteristics.
    Results: PA nerve density and distribution in sheep differ from humans, although pigs and sheep share similar characteristics, nerve fibers are observed in the media layer, adventitia, and perivascular tissue in sheep. Necrosis of the intima and focal hemorrhages within the media, adventitia, and perivascular adipose tissue were evidenced post laser PADN. Among the identified lesions, 40% reached adventitia and could be classified as effective for PADN. The use of 20 W ablation energy was safer and 30 W-ablation led to collateral organ damage.
    Conclusions: An ovine model is suitable for PADN procedures; however, nerve distribution in the PA bifurcation and main branches differ from human PA innervation. Laser ablation can be safely used for PADN procedures.
    MeSH term(s) Aged ; Animals ; Denervation ; Disease Models, Animal ; Feasibility Studies ; Female ; Humans ; Hypertension, Pulmonary/surgery ; Laser Therapy/methods ; Middle Aged ; Pulmonary Artery/innervation ; Pulmonary Artery/surgery ; Radiation Dosage ; Sheep ; Swine
    Language English
    Publishing date 2021-08-16
    Publishing country Switzerland
    Document type Comparative Study ; Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms22168788
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  9. Article ; Online: Histological evidence of inflammatory reaction associated with fibrosis in the atrial and ventricular walls in a case-control study of patients with history of atrial fibrillation.

    Mitrofanova, Lubov B / Orshanskaya, Victoria / Ho, Siew Yen / Platonov, Pyotr G

    Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology

    2016  Volume 18, Issue suppl 4, Page(s) iv156–iv162

    Abstract: Aims: Chronic inflammation in the atrial myocardium was shown to play an important role in the development of atrial fibrosis in patients with atrial fibrillation (AF). However, it is not clear to what extent atrial inflammatory reaction associated with ...

    Abstract Aims: Chronic inflammation in the atrial myocardium was shown to play an important role in the development of atrial fibrosis in patients with atrial fibrillation (AF). However, it is not clear to what extent atrial inflammatory reaction associated with AF extends on the ventricular myocardium. Our aim was to assess the extent of fibrosis and lymphomononuclear infiltration in human ventricular myocardium and explore its association with AF.
    Methods and results: Medical records from consecutive autopsies were checked for presence of AF. Heart specimens from 30 patients died from cardiovascular causes (64 ± 12 years, 17 men) were collected in three equal groups: no AF, paroxysmal AF, and permanent AF. Tissue samples were taken from the Bachmann's bundle, crista terminalis, posterior left atrium, left ventricle and right ventricle free walls and stained with Masson's trichrome for analysis of fibrosis extent. Immunohistochemistry was performed using antibodies against CD3- and CD45-antigens and quantified as number of antigen-positive cells per 1 mm
    Conclusion: Histological signs of chronic inflammation affecting ventricular myocardium are strongly associated with AF and demonstrate significant correlation with fibrosis extent that cannot be explained by cardiovascular comorbidities otherwise.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Atrial Fibrillation/pathology ; Atrial Fibrillation/physiopathology ; Autopsy ; Biomarkers/analysis ; Biopsy ; CD3 Complex/analysis ; Case-Control Studies ; Female ; Fibrosis ; Heart Atria/chemistry ; Heart Atria/pathology ; Heart Atria/physiopathology ; Heart Ventricles/chemistry ; Heart Ventricles/pathology ; Heart Ventricles/physiopathology ; Humans ; Immunohistochemistry ; Leukocyte Common Antigens/analysis ; Male ; Middle Aged ; Myocarditis/pathology ; Myocarditis/physiopathology ; Prognosis ; Ventricular Function, Left ; Ventricular Function, Right ; Ventricular Remodeling
    Chemical Substances Biomarkers ; CD3 Complex ; Leukocyte Common Antigens (EC 3.1.3.48) ; PTPRC protein, human (EC 3.1.3.48)
    Language English
    Publishing date 2016-12
    Publishing country England
    Document type Journal Article
    ZDB-ID 1449879-0
    ISSN 1532-2092 ; 1099-5129
    ISSN (online) 1532-2092
    ISSN 1099-5129
    DOI 10.1093/europace/euw361
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  10. Article ; Online: Pulmonary and Systemic Hemodynamics following Multielectrode Radiofrequency Catheter Renal Denervation in Acutely Induced Pulmonary Arterial Hypertension in Swine.

    Vakhrushev, Aleksandr D / Сondori Leonardo, Heber Ivan / Goncharova, Natalia S / Korobchenko, Lev E / Mitrofanova, Lubov B / Andreeva, Elizaveta M / Koshevaya, Elena G / Lebedev, Dmitry S / Mikhaylov, Evgeny N

    BioMed research international

    2021  Volume 2021, Page(s) 4248111

    Abstract: Objective: We aimed to assess the effects of renal denervation (RDN) on systemic and pulmonary hemodynamics in a swine model of thromboxane A2- (TXA2-) induced pulmonary arterial hypertension (PAH).: Methods: The study protocol comprised two PAH ... ...

    Abstract Objective: We aimed to assess the effects of renal denervation (RDN) on systemic and pulmonary hemodynamics in a swine model of thromboxane A2- (TXA2-) induced pulmonary arterial hypertension (PAH).
    Methods: The study protocol comprised two PAH inductions with a target mean pulmonary artery pressure (PAP) of 40 mmHg at baseline and following either the RDN or sham procedure. Ten Landrace pigs underwent the first PAH induction; then, nine animals were randomly allocated in 1 : 1 ratio to RDN or sham procedure; the second PAH induction was performed in eight animals (one animal died of pulmonary embolism during the first PAH induction, and one animal died after RDN). In the RDN group, ablation was performed in all available renal arteries, and balloon inflation within artery branches was performed in controls. An autopsy study of the renal arteries was performed.
    Results: At baseline, the target mean PAP was achieved in all animals with 25.0 [20.1; 25.2] mcg of TXA2. The second PAH induction required the same mean TXA2 dose and infusion time. There was no statistically significant difference in the mean PAP at second PAH induction between the groups (39.0 ± 5.3 vs. 39.75 ± 0.5 mmHg,
    Conclusions: According to our results, RDN does not result in significant acute pulmonary or systemic hemodynamic changes in the TXA2-induced PAH model. The potential chronic effects of RDN on PAH require further research.
    MeSH term(s) Animals ; Arterial Pressure ; Blood Pressure/drug effects ; Catheter Ablation/methods ; Catheters ; Denervation/methods ; Familial Primary Pulmonary Hypertension/pathology ; Hemodynamics/physiology ; Hypertension/physiopathology ; Kidney/physiopathology ; Pulmonary Arterial Hypertension/metabolism ; Pulmonary Arterial Hypertension/pathology ; Renal Artery/pathology ; Swine ; Sympathectomy/methods
    Language English
    Publishing date 2021-11-02
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2698540-8
    ISSN 2314-6141 ; 2314-6133
    ISSN (online) 2314-6141
    ISSN 2314-6133
    DOI 10.1155/2021/4248111
    Database MEDical Literature Analysis and Retrieval System OnLINE

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