92,009 research outputs found
The Role of Ivabradine in the Management of Angina Pectoris
Stable angina pectoris affects 2–4 % of the population in Western countries and entails an annual risk of death and nonfatal myocardial infarction of 1–2 % and 3 %, respectively. Heart rate (HR) is linearly related to myocardial oxygen consumption and coronary blood flow, both at rest and during stress. HR reduction is a key target for the prevention of ischemia/angina and is an important mechanism of action of drugs which are recommended as first line therapy for the treatment of angina in clinical guidelines. However, many patients are often unable to tolerate the doses of beta blocker or non-dihydropyridine calcium antagonists required to achieve the desired symptom control. The selective pacemaker current inhibitor ivabradine was developed as a drug for the management of patients with angina pectoris, through its ability to reduce HR specifically. The available data suggest that ivabradine is a well-tolerated and effective anti-anginal agent and it is recommended as a second-line agent for relief of angina in guidelines. However, recent clinical trials of ivabradine have failed to show prognostic benefit and have raised potential concerns about safety. This article will review the available evidence base for the current role of ivabradine in the management of patients with symptomatic angina pectoris in the context of stable coronary artery disease
Uso de microondas no controle do caruncho do feijão caupi, Acanthoscelides obtectus, e a sua ação sobre as propriedades alimentícias desses grãos.
Uso de microrganismos isolados de solos de insetos infectados, no controle de pragas de grãos armazenados.
Spontaneous CP violation in the 3-3-1 model with right-handed neutrinos
We implement the mechanism of spontaneous CP violation in the 3-3-1 model
with right-handed neutrinos and recognize their sources of CP violation. Our
main result is that the mechanism works already in the minimal version of the
model and new sources of CP violation emerges as an effect of new physics at
energies higher than the electroweak scale.Comment: Major changes in the quark sector, electronic dipole moment of the
neutron was evaluated, accepted for publication in the physical review
Going green: does it depend on education, gender, or income?
Sustainable development entails meeting our present needs without compromising the ability of future generations to meet their needs. This requires us to treat economic, social and environmental aspects in an integrated way, but little is known about the nature of individual preferences towards the trade-offs involved in this effort. For the first time, we study individual preferences towards the environment, social wellbeing, and financial wellbeing using a survey of over 1400 households in the Netherlands. Using nonparametric, parametric, and matching methods, we find that gender and education are important factors for sustainability rather than income levels. Moreover results indicate that educated females put the greatest value on going green whilst being socially minded.Sustainability, financial wellbeing, heterogenous preferences
Neutrino Mixing and the Minimal 3-3-1 Model
In the minimal 3-3-1 model charged leptons come in a non-diagonal basis.
Moreover the Yukawa interactions of the model lead to a non-hermitian charged
lepton mass matrix. In other words, the minimal 3-3-1 model presents a very
complex lepton mixing. In view of this we check rigorously if the possible
textures of the lepton mass matrices allowed by the minimal 3-3-1 model can
lead or not to the neutrino mixing required by the recent experiments in
neutrino oscillation.Comment: two references add, minor chages, accepted for publication in MPL
- …