Washington, Nov 11 : Bypass surgery in children with less complex heart defects doesn’t lead to low IQ levels, say researchers from the Children''s Hospital of Philadelphia.

The study involving 41 patients, aged five to 18 showed that the use of cardiopulmonary bypass does not cause short-term neurological problems in children and teenagers after surgery.

OSA is a potentially serious sleep disorder in which breathing repeatedly stops and starts during sleep and it occurs when throat muscles relax and block the airway.

A large number of studies have identified OSA as an independent risk factor for the development of several medical conditions, like high blood pressure, which are related to impairments or alterations in a person''s vascular (circulatory) system.

And eyes, with their own complex and sensitive vascular system, can sometimes signal and be affected by systemic vascular problems.

London, November 11 : An Indian-origin researcher in America says that tube-like carbon nano-particles can be used to explode cancer.

Balaji Panchapakesan at the University of Delaware, Newark, proposes the idea of filling carbon nanotubes with water before injecting them into a tumour.

He says that zapping the cancerous area with laser light at a later stage will cause the water to boil, and the tremendous pressure by the heating will trigger the "nanobombs" to burst apart, thereby killing nearby cells.

Washington, Nov 11 : Doctors may one day be able to use stem cells taken from umbilical cord blood to build new heart valves for babies born with heart defects, say researchers.

Washington, Nov 11 : A new study by researchers at Ohio University has revealed that obesity raises levels of the hormone leptin, which can be a big threat to the cardiovascular system.

Leptin, a peptide hormone produced by fat cells, helps regulate body weight by acting on the hypothalamus to suppress appetite and burn stored fat.

However, an excess of fat in the body can produce too much of the hormone, which, in turn, can lower levels of bioavailable nitric oxide.

Washington, November 11: A beating heart may produce enough energy to power pacemakers and defibrillators implanted in cardiac patients, according to a new study.

Dr. Paul Roberts, a Consultant Electrophysiologist at Southampton University Hospital in the UK, revealed that a microgenerator powered by heartbeats was found to produce almost 17 per cent of the electricity needed to run an artificial pacemaker during an experiment.