Transcatheter aortic valve replacement (TAVR) has become a treatment alternative for patients with severe aortic stenosis. As broadened indications and increasing clinical demand, the population referred for TAVR will become much more heterogeneous and anatomically challenging. Herein, we report an 88-year-old man with severe aortic stenosis and huge aortic annulus (annular area 831.8 mm2) successfully treated with overexpansion of a 29 mm Edwards SAPIEN 3 transcatheter heart valve.

Hydraulic drive unit (HDU) is a typical actuator, but the characteristic of input delay hinders the application of many advanced control methods in HDU. Firstly, in this paper, a mathematical model of HDU with input delay is established and the parameters are identified. Then, aiming at the input delay problem in HDU, a Smith estimated compensation model predictive control (SECMPC) strategy is proposed. On the one hand, the input delay state equation is employed to be a mathematical pattern for the state observation and predictive model. However, the combination between model predictive control (MPC) and Smith estimated compensation (SEC) is realized, the system state at k+d (d is the time delay coefficient) time is estimated in advance at k time to compensate the delay of the state. And then the prediction model based on input delay state equation is used for model prediction and rolling optimization. Thus the delay system which is unstable is promoted to a stable system without delay, and the effectiveness of SECMPC is proved with the HDU experiment and simulation. The SECMPC have some guiding significance for the control of systems with input delay.

Key points - 3D exoscopy is an emerging visualisation technique designed to improve ergonomics and image quality during surgeries. - We present a novel application of the VITOM® 3D exoscope in cochlear implantation (IDEAL Stage 2a prospective case series). - The system enabled high-quality visualisation during both posterior tympanotomy and electrode insertion. - Both the chief surgeon and the staff members rated the ergonomics of the system highly. - 3D exoscopy is a useful alternative to conventional microscopy, but the two techniques remain to be directly compared in larger studies.

Background:-This time last year in 2020 India was under lockdown phase, many theories about India's surprisingly low rates of Sars-CoV-2 infection included variety of factors including hot weather, natural immunity, heard immunity, robust health system, highly qualified doctors and the country's high proportion of young people; some also attributed it to the country's harsh lockdown. India was doing so well that in megacities like Mumbai and Delhi, officials had begun dismantling temporary COVID-19 facilities. Comparing it to current scenario in April 2021, cases and deaths are soaring. The shortage of beds and space is so acute that people are dying in car parks and other places while waiting to be admitted in hospitals. Daily rates are currently over 300,000, the world's highest-ever daily infection rate. i

A 48-year-old woman, considered as a close contact of her husband who was diagnosed with COVID-19. She was clinically diagnosed with COVID-19-related pneumonia because of a positive antibody test. Her BALF contained an elevated lymphocyte fraction, which might explain why steroids are effective against COVID-19-related pneumonia.

Torsion of the ovary is a common gynaecological surgery emergency. It is important to distinguish torsion of ovary from torsion of ovarian cyst as their sequelae and management are different as seen in the lower salvage rate of the former. A history of previous episodes may suggest spontaneously resolving torsion.

Systemic lupus erythematosus (SLE) is a multisystem disease with a complex etiology which manifests in a multitude of manners. We present a case of lupus nephritis in a patient who developed complications of immunosuppressive treatment with eventual resolution of her nephritis following cure of her Nocardia brain abscess

Background: Standard dose seasonal influenza vaccines often produce modest immunogenic responses in adults ≥65 years old. MF59 is intended to elicit a greater magnitude and increased breadth of immune response. Objective: To determine the effectiveness of seasonal MF59-adjuvanted trivalent/quadrivalent influenza vaccine (aTIV/aQIV) relative to no vaccination or vaccination with standard or high dose egg-based influenza vaccines among people ≥65 years old. Methods: Cochrane methodological standards and PRISMA-P guidelines were followed. Real-world evidence from non-interventional studies published in peer reviewed journals and grey literature from 1997 through to July 15, 2020, including cluster-randomized trials, were eligible. Two reviewers independently extracted data and risk of bias was assessed using the ROBINS-I tool. Results: Twenty-one studies conducted during the 2006/07-2019/20 influenza seasons were included in the qualitative review; 16 in the meta-analyses. Meta-analysis of test-negative studies found that aTIV reduced medical encounters due to lab-confirmed influenza with pooled estimates of 40.7% (95% CI: 21.9, 54.9; I2=0%) for general practitioner visits and 58.5% (40.7, 70.9; I2=52.9%) for hospitalized patients. The pooled estimate of VE from case-control studies was 51.3% (39.1, 61.1; I2=0%) against influenza- or pneumonia-related hospitalization. The pooled estimates for the relative VE of aTIV for the prevention of influenza related medical encounters were 13.9% (4.2, 23.5; I2=95.9%) compared with TIV, 13.7% (3.1, 24.2; I2=98.8%) compared with QIV, and 2.8% (-2.9, 8.5; I2=94.5%) compared with HD TIV. Conclusions: Among adults ≥65 years aTIV demonstrated significant absolute VE, improved relative VE compared to non-adjuvanted standard-dose TIV/QIV, and comparable relative VE to high-dose TIV.

Background: Data directly comparing trends in the use of different oral anticoagulants (OACs) among patients with atrial fibrillation (AF) from different countries are limited. We addressed this using a large-scale network cohort study in the United States (US), Belgium, France, Germany and United Kingdom (UK). Methods: We used nine databases (claims or electronic health records) that had been converted into the Observational Medical Outcomes Partnership Common Data Model with analysis performed using open-source analytical tools. We identified adults with AF and a first OAC prescription, either vitamin K antagonist (VKA) or direct oral anticoagulant (DOAC) from 2010–2017. We described time-trends in use, continuation and switching. Results: In 2010, 87.5%–99.8% of patients started on a VKA. By 2017, the majority started on a DOAC: 87.0% (US), 88.3% (Belgium), 93.1% (France), 88.4% (Germany), 86.1%–86.7% (UK). In the UK, DOACs became the most common starting OAC in 2015, 2–3 years later than elsewhere. Apixaban was the most common starting OAC by 2017: 50.2%–57.8% (US), 31.4% (Belgium), 45.9% (France), 39.5% (Germany), 49.8%– 50.5% (UK), followed by rivaroxaban; 24.8%–32.5% (US), 25.7% (Belgium), 38.4% (France), 24.9% (Germany), 30.2%– 31.2% (UK). Long-term treatment was less common in the US than in Europe, especially the UK. A minority of patients switched from their index OAC, both in the short- and long-term. Conclusions: From 2010–2017, VKA use had significantly declined and DOAC use had significantly increased in the US and Europe; apixaban was the most prescribed OAC in 2017 followed by rivaroxaban.

Development of severe hyponatremia after carotid endarterectomy procedure is rare. Several pathophysiological mechanisms related to the carotid endarterectomy procedure may infer an increased risk of developing this complication in specific populations.

This report describes a case of 45 years old male patient who tested positive for COVID-19 presented to the emergency department on March 2021 complaining of fever, cough, runny nose, and shortness of breath. The patient denied any history of nausea or diarrhea who has eventually developed favipiravir-induced nephrotoxicity.

Tension pneumomediastinum (TPM) is a rare but potentially fatal clinical entity. This leads to leakage of air into the mediastinal cavity and increased pressure on thoracic vessels, respiratory tract, and the heart. We report a series of five cases of COVID-19 complicating into acute respiratory distress syndrome and developing TPM.

Aims: The purpose of this study was to examine cardiac structure and function in lowlanders at high altitude(HA) to investigate short-term adaptation and long-term cardiac remodeling. Methods: In total of 301 healthy subjects included in this study, short-term exposed (STE) and acclimatized lowlanders (AL) at HA, native Tibetans(NT) and sea level residents(SLR) were comprised of 75,77,69 and 80 participants, respectively. Standard echocardiography was performed on all groups, subjects at HA were examined after return to sea level in <24 hours. Results: SBP and HR did not increase significantly after short-term exposure to HA in STE, but increased after long-term exposure in AL, which could be detected even after returning to the plain. Exposure to HA enlarged right heart, widened pulmonary artery and reduced left ventricular(LV) diastolic function in lowlanders. The degree of diastolic dysfunction was more obvious in AL. LV wall thickness increased even after short-term exposure to HA in lowlanders. Ejection fraction did not change significantly in STE, but decreased in AL. Conclusions: Exposure to HA could enlarged the right heart and decrease the diastolic function of LV in lowlanders. The LV systolic function was preserved after short-term HA exposure, but decreased after long-term HA exposure.

Background: Chemokines are important mediators in immune cell recruitment, contributing to allergy development. However, extensive studies of chemokines in the circulation in relation to the presence and development of allergic diseases remain scarce. Our aim was to investigate associations of circulating allergy-related chemokines with development of asthma and sensitisation cross-sectionally and longitudinally in a population-based cohort. Methods: The chemokines CCL17, CCL22, CXCL10, CXCL11 and CCL18 were measured in plasma samples from children in the Manchester Asthma and Allergy Study. Samples were available from cord blood at birth (n=376), age 1 (n=195) and 8 years (n=334). Cross-sectional and longitudinal association analyses were performed in relation to asthma and allergic sensitisation, as well as allergic phenotype clusters previously derived using machine learning in the same study population. Results: In children with asthma and/or allergic sensitisation, CCL18 levels were consistently elevated at ages 1 and/or 8 years. In a longitudinal model including information on asthma from 4 time-points (ages 5, 8, 11 and 16 years), we observed a significant association between increasing CCL18 levels at age 1 and a higher risk of asthma from early school age to adolescence (OR=2.9, 95% CI 1.1-7.6, p=0.028). We observed similar associations in longitudinal models for allergic sensitisation. Asthma later in life was preceded by increased CXCL10 levels after birth, and decreased CXCL11 levels at birth. Conclusion: Elevated CCL18 levels throughout childhood precede the development of asthma and allergic sensitisation. The Th1-associated chemokines CXCL10 and CXCL11 also associated with development of both outcomes, with differential temporal effects.

Background: The optimal ablation strategy for persistent atrial fibrillation (PsAF) remains to be defined. We sought to compare very long-term outcomes between linear ablation and electrogram (EGM)-guided ablation for PsAF. Methods: In a retrospective analysis, long-term arrhythmia-free survival compared between two propensity-score matched cohorts, one with pulmonary vein isolation (PVI) and linear ablation including roof/mitral isthmus line (LINE-group, n=52) and one with PVI and EGM-guided ablation (EGM-group; n=52). Results: Overall, 99% of patients underwent successful PVI. Complete block following linear ablation was achieved for 94% of roof lines and 81% of mitral lines (both lines blocked in 75%). AF termination by EGM-guided ablation was accomplished in 40% of patients. Non-PV foci were targeted in 7 (13%) in the LINE-group and 5 (10%) patients in the EGM-group (p=0.76). During 100±28 months of follow-up, linear ablation was associated with superior arrhythmia-free survival after the initial and last procedure (1.8±0.9 procedures) compared with EGM-group (Logrank test: P=0.0001 and P=0.045, respectively). In multivariable analysis, longer AF duration and EGM-guided ablation remained as independent predictors of AAs recurrence. Conclusions: Linear ablation is a more effective complementary technique to PVI than EGM-guided ablation for PsAF ablation.

Introduction: Congenital Junctional Ectopic Tachycardia (JET) is a rare tachyarrhythmia that remains difficult to manage with suboptimal control in the majority of cases. Methods: Here, we report the successful use of Ivabradine in combination with Flecainide for the therapy of congenital JET resistant to multiple antiarrhythmic agents. Results: This new drug combination was effective in completely suppressing JET . Conclusion: Ivabradine in combination with Flecainide may be considered a new therapeutic strategy of congenital JET with satisfactory efficacy/tolerability ratio in patients resistant to conventional drug combinations.

fibromatoses (Desmoid-type) tumour is rare benign fibrous tumours account approximately for 0.03% of all neoplasms. The Pancreas origin of this tumour is even more rarely reported subset with around 5% only. We aim to report the success in cure a rare and the largest pancreatic desmoid-type

The novel coronavirus SARS-COV-2 or COVID-19 was first discovered in Wuhan, China in late December 2019 and soon became a global pandemic. The virus causes flu-like symptoms and is potentially lethal. The rapid spread of the virus leaves the world in total paralysis and has devastating effects on the health, economic, and social levels of most countries. No treatment has been approved yet and the world really needs a precise and urgent medication. Certainly, the developing of a new specific drug for COVID-19 would take a longer time than expected but it is hoped that this task will be completed sooner than later; therefore recent studies have prioritized testing previously FDA-approved drugs for other indications and whether they have significant effects on COVID-19 or not. In this study, we discuss recent applications, protocols, and the outcomes of these drugs as advised by healthcare institutions and providers, as well as to conduct a literature review.

Kaposi sarcoma (KS) is an angioproliferative disorder. While KS of the head and neck is common in HIV-positives, it’s rare in HIV-negatives. Our case and the past 24 reported cases of ear KS reviewed here, highlight the importance of considering KS in the differential diagnosis of ear lesions in HIV-negatives.

The sternum is an exceptional localization for Diffuse Large B Cells Lymphoma. A Case of a man with a sternal mass that mimics a sarcoma on the CT scan. Needle biopsy was not contributive. Surgical resection was indicated because of a local progression. Histopathological examination concluded to a primary DLBCL

There are few reports on pregnancy and childbirth of HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP) patients. We present a woman who diagnosed with HAM/TSP and used a wheelchair in daily life. She had no neurological impairments and no obstetrical complications during her three courses of pregnancy and childbirth.

A female presented with segmental vitiligo on right Ophthalmic(V1) nerve distribution followed by hemifacial atrophy on right mandibular(V3) nerve distribution which stabilized after treatment with chloroquine and betamethasone pulse. Both dermatoses have younger onset, rapid progression followed by stabilization and dermatomal distribution suggests a possible common aetiological link.

Chemical meningitis is a rare, noninfectious complication of intrathecal manipulation. The common complaint of back pain may result in the need for neurosurgical procedures or placement of intrathecal pain pumps, which may give rise to this complication.

Introduction:Congenital lobar emphysema (CLE) is a rare developmental lung malformation that involves the hyperaeration of one or more lung lobes due to partial obstruction and occurs at a rate of 1/20,000–30,000 live births.Here,we aimed to retrospectively examine the clinical, radiological, and bronchoscopy findings of patients with CLE who were diagnosed and treated with surgical or conservative approaches in our clinic to compare our results with those in the literature. Method:We examined the clinical, and radiological data and FB findings of the patients with CLE aged 0–18 years at our center between 2013 and 2020.We also examined the symptoms and findings recorded during the patients’ follow-up. Results:.The median age of 20 patients with CLE at diagnosis was 3.2 years (range, 1 day–17 years).Respiratory distress and mediastinal shift were more prominent in the patients who underwent surgery than the patients who were followed up conservatively and diagnosed at an early age (p = 0.001, p = 0.049, p = 0.001, respectively). Discussion: In line with studies in the literature, the pulmonary symptoms and CLE-related imaging findings in our study regressed during the conservative follow-up.We recommend clinicians consider performing a detailed anamnesis for patients with unresolved respiratory symptoms and unilateral or bilateral increased ventilation,along with appropriate imaging tests and examinations, and should consider CLE in the diagnosis.