RESUMEN
Creativity, transforming imaginative thinking into reality, is a mental imagery simulation in essence. It can be incorporeal, concerns sophisticated and/or substantial thinking, and involves objects. In the present study, a mental imagery task consisting of creating a scene using familiar (FA) or abstract (AB) physical or virtual objects in real (RMI) and augmented reality (VMI) environments, and an execution task involving effectively creating a scene in augmented reality (VE), were utilised. The beta and gamma neural oscillations of healthy participants were recorded via a 32 channel wireless 10/20 international EGG system. In real and augmented environments and for both the mental imagery and execution tasks, the participants displayed a similar cortico-cortical neural signature essentially based on synchronous vs asynchronous beta and gamma oscillatory activities between anterior (i.e. frontal) and posterior (i.e. parietal, occipito-parietal and occipito-temporal) areas bilaterally. The findings revealed a transient synchronised neural architecture that appears to be consistent with the hypothesis according to which, creativity, because of its inherent complexity, cannot be confined to a single brain area but engages various interconnected networks.
RESUMEN
The acute hemodynamic effects of intravenous amiodarone (Cordarone injectable; Labaz) were studied during cardiac catheterization in 16 male patients with coronary artery disease (age range, 38-64 years; mean, 53 years). Amiodarone was administered as a bolus at a dosage of 5 mg/kg bodyweight over a 1-min period. Measurements were made 5, 10, and 15 min thereafter. The drug had little effect on heart rate, aortic pressure, cardiac index, and vascular resistances. There were small and nonsignificant increases in left ventricular end-diastolic pressure and end-diastolic volume. The ejection fraction decreased slightly and not significantly. In addition to some increases in pulmonary wedge, pulmonary artery, and right atrial pressures, the significant findings were a 15% decrease in maximal dP/dt and a 12% decrease in left ventricular work. These changes point to a slight negative inotropic effect of amiodarone.
Asunto(s)
Amiodarona/farmacología , Benzofuranos/farmacología , Enfermedad Coronaria/fisiopatología , Hemodinámica/efectos de los fármacos , Adulto , Amiodarona/administración & dosificación , Presión Sanguínea/efectos de los fármacos , Frecuencia Cardíaca/efectos de los fármacos , Humanos , Inyecciones Intravenosas , Masculino , Persona de Mediana EdadRESUMEN
This study shows that peripheral venous flow detected by Doppler ultrasound becomes synchronously pulsatile with heart beats as soon as central venous pressure (CVP) is above 7 mm Hg. CVP was above 7 mm Hg in 13 among 46 patients. Clinical signs of right heart failure were detectable in only 7 of these 13 patients (sensitivity 54%), whereas peripheral venous flow was pulsatile in 12 of them (sensitivity 92%). In 4 patients with a normal CVP, peripheral venous flow was also pulsatile; all of them suffered from valvular heart disease with left ventricle ejection fraction below 60% in 3 of them. The detection of a pulsative peripheral venous blood flow constitutes an early sign of right heart failure, more sensitive than clinical evaluation, and probably even more than CVP.
Asunto(s)
Insuficiencia Cardíaca/diagnóstico , Reología , Ultrasonografía , Presión Venosa Central , Femenino , Vena Femoral , Humanos , Masculino , Persona de Mediana Edad , Contracción Miocárdica , Pulso ArterialRESUMEN
A diastolic gradient across the mitral valve is generally indicative of mitral valve stenosis. In the present study, echocardiography was used to demonstrate two less common causes of left ventricular inflow obstruction: one patient had a fibromuscular membrane beneath the valve, the other a large vegetation attached to the posterior leaflet of the mitral valve. Echocardiography proved to be the optimal imaging technique in each case.
Asunto(s)
Ecocardiografía/métodos , Válvula Mitral/fisiopatología , Síndrome de Noonan/diagnóstico , Adulto , Válvula Aórtica/patología , Diástole , Endocarditis Bacteriana/complicaciones , Femenino , Enfermedades de las Válvulas Cardíacas/diagnóstico , Enfermedades de las Válvulas Cardíacas/fisiopatología , Humanos , Masculino , Persona de Mediana Edad , Válvula Mitral/patología , Pronóstico , Infecciones Estreptocócicas/complicacionesRESUMEN
The study examines attitudes of family practice residents toward social work collaboration in their practices. Residents valued social work services highly, and almost three-fourths want a social worker in practice with them. Residents valued the broad range of services offered by social workers, and over half could see no disadvantages to such collaboration.