Publications by authors named "Algirdas Tamosiunas"

Contralateral A1 and AComA aplasia/hypoplasia are critically important in distal ICA T occlusion as the protective collateral blood supply from the circle of Willis via the anterior communicating artery is compromised. Although the terms aplasia/hypoplasia are used broadly in the literature, the need for concrete measurements and data on their clinical significance is apparent. Features of the individual anatomy of the circle of Willis may determine patient outcomes.

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Background: Acute embolic ischemic stroke poses a significant healthcare challenge. Histological clot features' variability among patients with acute ischemic stroke treated by mechanical thrombectomy has potential implications for determining treatment and etiology. This study investigated the clot histological feature differences among patients who experienced cardioembolic stroke and embolic stroke of undetermined source with different left atrial appendage (LAA) morphologies.

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Many quantitative imaging modalities are available that quantify chronic liver disease, although only a few of them are included in clinical guidelines. Many more imaging options are still competing to find their place in the area of diagnosing chronic liver disease. We report our first prospective single-center study evaluating different imaging modalities that stratify viral hepatitis-associated liver fibrosis in a treatment-naïve patient group.

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-Chronic viral hepatitis B and C infections are one of the leading causes of chronic liver impairment, resulting in liver fibrosis and liver cirrhosis. An early diagnosis with accurate liver fibrosis staging leads to a proper diagnosis, thus tailoring correct treatment. Both invasive and noninvasive techniques are used in the diagnosis and staging of chronic liver impairment.

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The aim of the study was to evaluate the diagnostic utility of specific miRNAs in the preoperative assessment of thyroid nodules. One hundred and sixty thyroid fine needle aspiration biopsy (FNAB) samples with suspected thyroid carcinoma were collected. To detect the levels of miRNA expression in FNAB, next generation small RNA sequencing was performed in 60 samples.

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Pretreatment with intravenous thrombolysis (IVT) is still recommended in all eligible acute ischemic stroke patients with large-vessel occlusion before mechanical thrombectomy (MTE). However, the added value and safety of bridging therapy versus direct MTE remains controversial. We aimed at evaluating the influence of r-tPA dose level in patients with middle cerebral artery (MCA) occlusion treated with MTE.

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The objective of this study was to assess the value of a whole-body bone scintigraphy using 99m technetium labelled-methyl diphosphonate (99mTc-MDP) for the diagnosis and the assessment of grades of muscle damage after prolonged acute or chronic obstruction of the main arteries in lower extremities. : Fifty consecutive patients were selected for the study. The patients' condition had not improved after primary peripheral arterial reconstruction operation or limb amputation and after conservative treatment.

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Objectives: The aim of this study was to simulate low dose paediatric head CT images with different noise levels corresponding to various tube current time product values and assess simulated image suitability in non-syndromic craniosynostosis diagnostics.

Method: 29 paediatric patients who underwent head CT examinations for cranial deformity were enrolled in the study. The low dose CT images, corresponding to 120 kV and 120 mAs, 100 mAs, 80 mAs, 50 mAs and 13 mAs settings, were synthesised by adding noise to original data.

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Introduction: Bosniak introduced a classification of renal cysts based on imaging characteristics. Cystic renal changes are categorized determining their risk of malignancy and further management. However, defining the malignancy of category III lesions still remains a challenge and our aim was to evaluate the features of malignancy in computed tomography within this category.

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Objective: In cardiac magnetic resonance imaging (CMR), incidental pathological findings are frequently found outside the investigated cardiovascular system. Some of these findings might have clinical implications. The aim of this study was to determine the prevalence of incidental extracardiac findings (ECF) in CMR and their clinical significance.

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Aims: After the sequence of Symplicity HTN trials, the impact of the procedure on lowering blood pressure (BP) and cardiovascular risk is still debatable. We present initial results of the multimodal pilot study that aimed at carefully selecting proper patients and investigating the effects of RASD on cardiac morphology and central haemodynamic parameters in 15 patients with resistant arterial hypertension prior and 6 months after RASD.

Methods And Results: The multimodal (applanation tonometry, echocardiography and cardiac magnetic resonance (CMR)) study findings have shown a significant BP decrease (190/112 ± 23/12 to 153/91 ± 18/11 mm Hg, P < 0.

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We report a case of preoperative incidental finding in a 34-year-old man with a significant aortic insufficiency. Preoperative chest x-ray was suspicious for arteriovenous malformation in the right lung. Chest CT angiography discovered an anomalous course of the left superior pulmonary vein crossing the mediastinum to the contralateral hemithorax, joining the right superior pulmonary vein before entering the right inferior pulmonary vein and forming a common trunk of right inferior pulmonary vein.

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Objective: Through the study of preserved human remains, it is now known that atherosclerosis, commonly thought to be a modern disease, also existed in historic and prehistoric periods. To date, however, little evidence of atherosclerosis has been reported in samples of tissues from spontaneously mummified bodies that are often found in European crypts and churches.

Methods: Within the framework of the Lithuanian Mummy Project, whole-body computed tomographic scans of seven spontaneous mummies from a crypt in Vilnius were obtained and assessed for indications of atherosclerosis.

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Unlabelled: Our goal was to assess the natural fate of iron overload (IO) following transfusions of packed red blood cells (PRBCs) in children treated for cancer and nonmalignant disorders according to the intensity level of their treatment. Sixty-six children were followed up from February 2010 to March 2013. The transfusion burden was compared between three treatment intensity groups assigned according to the Intensity of Treatment Rating Scale 3.

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Amyloidosis is a rare condition characterized by the deposition of abnormal protein filaments into the extracellular tissue. Only 16 cases of true primary idiopathic amyloidosis localized in the nose and the paranasal sinuses have previously been reported. We present a case of localized amyloidosis involving the sinonasal cavities and the nose in a 53-year-old woman.

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Background And Objective: In this study, we have sought for differences between cardiovascular magnetic resonance patterns of acute myocarditis and acute myocardial infarction.

Material And Methods: A prospective analysis of 110 consecutive patients was performed. The presence, precise location, and pattern of late gadolinium enhancement (LGE) by cardiovascular magnetic resonance were investigated.

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We reported a case of 68-year-old man, with a previous history of hypertension. Patient was admitted to our institution for evaluation of a severe, constant, tearing anterior chest pain radiated to the neck with suspicion of acute aortic dissection. A multidetector computed tomography scan of thorax and abdomen demonstrated a dissection starting from the middle part of aortic arch and extending downward to the descending aorta till the middle part of the thoracic aorta.

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Background: This study sought to prospectively and directly compare three cardiovascular magnetic resonance (CMR) viability parameters: inotropic reserve (IR) during low-dose dobutamine (LDD) administration, late gadolinium enhancement transmurality (LGE) and thickness of the non-contrast-enhanced myocardial rim surrounding the scar (RIM). These parameters were examined to evaluate their value as predictors of segmental left ventricular (LV) functional recovery in patients with LV systolic dysfunction undergoing surgical or percutaneous revascularisation. The second goal of the study was to determine the optimal LDD-CMR- and LGE-CMR-based predictor of significant (≥ 5%) LVEF improvement 6 months after revascularisation.

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Chronic ischemic left ventricular dysfunction is present in number of clinical syndromes in which myocardial revascularization results in an improvement of left ventricular function, patients' functional class, and their survival. Coronary arteriography is of limited value in diagnosis of viability. Noninvasive testing, traditionally nuclear imaging, stress echocardiography and (stress) electrocardiography have been the clinical mainstays for assessing myocardial viability as well as to detect myocardial ischemia.

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We report a mildly symptomatic 12-year-old boy with a very rare congenital anomaly-isolated unilateral pulmonary vein atresia. Diagnosis was made using CT angiography and its role in diagnosis is discussed.

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