A ton of refrigeration (TR), also called a refrigeration ton (RT), is a unit of power used in some countries (especially in North America) to describe the heat-extraction capacity of refrigeration and air conditioning equipment.
A brain (cerebral) aneurysm is a bulging, weak area in the wall of an artery that supplies blood to the brain. In most cases, a brain aneurysm causes no symptoms and goes unnoticed. In rare cases, the brain aneurysm ruptures, releasing blood into the skull and causing a stroke. High blood pressure. 2  The risk of subarachnoid hemorrhage is greater in people who have a history of high blood pressure. 3  Smoking. 4  In addition to being a cause of high blood pressure, the use of cigarettes may greatly increase the chances of a brain aneurysm rupturing.
A brain aneurysm occurs when a weak spot in your brainâs arterial wall bulges and fills with blood. It may also be called an intracranial (skull) aneurysm or a cerebral (brain) aneurysm. A brain aneurysm is a potentially life-threatening condition that can affect a person at any age. If a brain aneurysm bursts, itâs an emergency situation that can result in a stroke, brain damage, and even death if not treated immediately.