Analysis of gyrobianisotropic media effect on the input impedance, field distribution and mutual coupling of a printed dipole antenna.

In this paper, we present an analytical study for the investigation of the effects of the magnetoelectric elements of a reciprocal and nonreciprocal bianisotropic grounded substrate on the input impedance, resonant length of a dipole antenna as well as on the mutual coupling between two element printed dipole array in three configuration geometries: broadside, collinear and echelon printed on the same material. This study examines also the effect of the considered bianisotropic medium on the electric and magnetic field distributions that has been less addressed in the literature for antenna structures. Computations are based on the numerical resolution, using the spectral method of moments, of the integral equation developed through the mathematical derivation of the appropriate spectral Green's functions of the studied dipole configuration.

Electrocardiograms Revealing Epsilon Waves Following Use of Hormone Supplements in Young Cardiac Arrest Patient.

An underlying cardiomyopathy should be suspected in young patients presenting with ventricular arrhythmias and sudden cardiac arrest. Electrocardiograms revealing epsilon waves are associated with many serious conditions such as arrhythmogenic right ventricular cardiomyopathy, posterior myocardial infarction, right ventricular infarction, infiltration disease, sarcoidosis, Brugada Syndrome, Tetralogy of Fallot, and hypothermia. This case report features epsilon waves in a young cardiac arrest patient suspected of having an unrecognized cardiomyopathy that resulted in a fatal arrhythmia in the setting of exogenous bovine thyroid hormone and steroid use.

Incidence of Atrioventricular Block After Valve Replacement in Carcinoid Heart Disease.

Background: Carcinoid heart disease (CaHD) is a rare condition that has a high impact on the morbidity and mortality of its patients. Once heart failure symptoms develop in the patient with CaHD, cardiac valve surgery is often the only effective treatment. Although atrioventricular block (AVB) is a known postoperative complication of the valve surgery, the incidence of AVB in this population has not been well described.

The Antimalarial Chloroquine Reduces the Burden of Persistent Atrial Fibrillation.

In clinical practice, reducing the burden of persistent atrial fibrillation by pharmacological means is challenging. We explored if blocking the background and the acetylcholine-activated inward rectifier potassium currents (I and I) could be antiarrhythmic in persistent atrial fibrillation. We thus tested the hypothesis that blocking I and I with chloroquine decreases the burden of persistent atrial fibrillation.

Surgical Treatment of an Isolated Metastatic Myocardial Neuroendocrine Tumor.

We describe a patient diagnosed with a neuroendocrine tumor of the small intestine metastatic to the heart who underwent successful cardiac metastasectomy. The tumor was located on the right ventricle free wall, obstructing the right ventricular outflow tract. There was no valvular involvement.