Recently Published Articles
Skeletal Muscle Calcium Channel Mutation R528G: Enhanced Channel Inactivation and Omega-Current at Hyperpolarization Contribute to Hypokalemic Periodic Paralysis.
Abstract:
Autosomal dominant inherited hypokalemic periodic paralysis (HypoPP) is caused by S4 voltage sensor mutations in skeletal muscle CaV1.1 calcium or NaV1.4 sodium channels. In the present study, a small German family with the known CaV1.1-R528G is described. The phenotype consists of short and infrequent episodes of limb weakness with ictal respiratory and cardiac involvement. There is incomplete penetrance in women, and acetazolamide is beneficial in two patients also taking daily potassium. Expression of the mutation in the GLT mouse muscle cell line revealed accelerated kinetics of inactivation by twofold, a left-shift of the steady-state inactivation curve by 13mV and a reduced recovery from fast inactivation by up to 39%. These changes suggest a stabilization of the inactivated state. Additional significant slowing of activation may support a second open state with differing ion selectivity or decreased activation of calcium-act...
Influence of Light Source and Photopolymerization Distance on Composite Resin Microhardness
Abstract:
The present study evaluated
Earworms and Hallucinations
Abstract:
There is a growing scientific interest in the phenomenon of earworms, which are melodies that are heard and re-heard despite the absence of an external stimulus. The aim of this paper is to determine whether understanding earworms can shed light on mechanisms underlying auditory hallucinations in psychosis. Method: Using recent data sources, this report briefly reviews what is most relevant about musical hallucinations and earworms. Musical hallucinations, like hallucinated voices, are more prevalent in women. In the elderly, they are often associated with hearing impairment. They are most distressing when they first begin, with the degree of distress inversely proportional to the extent to which the...
Evaluation of Crest Guideline Validity for Diagnosis of Non-Facial Cellulites
Abstract:
Cellulitis is an acute, spreading pyogenic inflammation of the dermis and subcutaneous tissue, usually complicating a wound, ulcer, or dermatosis. Inappropriate diagnosis of cellulitis is a problem and would need prospective rather than retrospective studies to quantify the extent. There is one national guideline for the management of patients with cellulitis. The aim of this study is to determine the validity of Crest guideline in the patients with non-facial cellulitis. This prospective cohort study was conducted on all Adult patients with cellulites who were admitted at Resole-Akram and Sina emergency department between November 2013 and January 2014. Based on admission duration, the patients were randomly divided into two groups including primary and secondary outcome, <24-hours or >24-hours admission, respectively. Out of 89 admitted patients, 55% were hospitalized over 24 hours and 20% of them had significant systemic symptoms. The most patients (n= 42...
A Potential New Technique to Estimate the Origins of Focal Atrial Tachycardias from 12-Lead Electrocardiograms
Abstract:
This brief report presents a potential new technique for locating the sites of origin of focal atrial tachycardias from standard 12-lead electrocardiograms. Estimated P wave vector coordinates are derived from leads I, aVF, V1 and V2, and mapped to a three dimensional coordinate system in space. A simple graphical method is used to find the back projection of the P wave vector onto the surface of atrial muscle to estimate the most likely site of origin of the tachycardia. Graphical back projection correctly identified foci of atrial tachycardias in 19 of 19 cases described in the most complete available published study.
Evidence that N-acetylaspartylglutamate is the Astrocyte-Targeted Neurovascular Coupling Agent that Regulates Slow Tonic Control of Brain Blood Flow
Abstract:
N-acetylaspartylglutamate (NAAG) is the highest concentration dipeptide present in brain. It is found primarily in neurons but its function is unclear. NAAG is synthesized by neurons from N-acetylaspartate and glutamate (Glu), maintained at mM concentrations and is released non-synaptically to extracellular fluid (ECF). NAAG is a non-excitatory form of Glu, and is targeted to the metabotropic group II Glu receptor 3 (mGluR3) on the surface of astrocytes. After docking with the receptor, Glu is released by the action of NAAG peptidase. Previously, it was shown for the first time that an NAAG-peptidase inhibitor reduced global cerebral blood flow (CBF) in mouse brain but did not affect their physical performance. Recently, it has been demonstrated that there are two separate systems involved in neurovascular coupling by astrocytes, one is a rapid focal phasic response providing energy for stimulation-induced neuronal activity, and the other a slower global tonic res...
Application of a Cardiac Septal Occluder in a Patient Affected by Enteroatmospheric Fistula
Abstract:
Enteroatmospheric fistula is a challenging and emerging clinical situation, mainly related to “open abdomen” technique in damage control surgery for trauma and in case of multiple laparotomies. We report the case of a 61-year-old male patient, affected by rectal carcinoma, submitted to standard surgical treatment and gradually evolving in persistent proximal jejunal fistula. The positioning of a cardiac septal occluder (Amplatzer®) was associated with immediate and late favourable effects. The procedure was conducted “bed-side” and turned out to be easy and safe.
Obesity in Schizophrenia
Abstract:
Over the last three decades, an epidemic of obesity has markedly affected patients suffering from mental illnesses such as schizophrenia. Antipsychotic medications used to treat schizophrenia are considered as major culprits. The aim of this review is to first consider risk factors, to then outline negative sequelae of obesity for this population, and finally to address timing and content of recommended clinical interventions. Medical databases were searched with the terms “”weight,” “obesity,” and “schizophrenia.” Selection of articles was guided by date of publication; recent papers are preferentially cited. The main findings were that, in addition to antipsychotic medications, socio-economics, lifestyle, immune factors, and circadian rhythms also contribute to obesity risk. A barrier to effective health promotion within psychiatry has been the concern that fears about gaining weight might stop individuals with schizophrenia from taking needed anti...
Pulmonary Hypertension in an Elderly HIV-infected Veteran Population
Abstract:
Pulmonary hypertension may occur as a co-morbid disease in HIV. We examined the characteristics of our HIV infected veterans with pulmonary hypertension and compared them with a control group of HIV infected patients without pulmonary hypertension. Among our cohort, patients were diagnosed with pulmonary hypertension at a mean age of 49.8 y ± 11.0y. This diagnosis came about 8.1y ± 6.7y after the diagnosis of HIV. Our pulmonary hypertension patients lived for about 3.4 ± 3.0y after their pulmonary hypertension diagnosis. The presence of pulmonary hypertension in HIV infection confers an increased risk of mortality. Mortality in our pulmonary hypertension cohort was 73%.
Allergic Angioedema and Urticaria After Ingestion of Organic Tea
Abstract:
Allergic angioedema of the airways is a potentially life-threatening condition. The allergen can be difficult to identify. Treatment in the acute phase comprises of antihistamines, steroids, adrenaline and in severe cases prophylactic intubation. Allergic angioedema can be encountered in all medical specialties including odontology. It can develop fast and emergency treatment is lifesaving. Knowledge of symptoms and emergency treatment is important. We present a case of a 33-year-old female physician who in a matter of hours developed first an atypical urticarial eruption followed by angioedema of the upper airways. She was treated with antihistamines, as she refused other treatments due to lactation. The patient also refused further investigations, however she has not had any further episodes after discontinuing the ingestion of organic tea. Allergic reactions are unpredictable and have a large variety of triggers. The most likely tr...