The origins of the Mass Rapid Transit (MRT) are derived from a forecast by city planners in 1967 which stated the need for a rail-based urban transport system by 1992.he lines are built by the Land Transport Authority, a statutory board of the Government of Singapore, which allocates operating concessions to the profit-based corporations, SMRT Corporation and SBS Transit. These operators also run bus and taxi services, thus facilitating full integration of public transport services.
A silent heart attack is a heart attack that happens without causing noticeable symptomsâor at least, without causing symptoms so severe that the victim cannot ignore them. Most of us tend to think about a myocardial infarction (heart attack) as a pretty dramatic eventâand most of the time, it is.
A lacunar infarct is a type of silent stroke, which means it may not produce any outside symptoms.In many cases, patients are unaware when they suffer a lacunar stroke. Despite not causing any symptoms, this type of stroke still damages the brain and puts the patient at risk of major stroke attacks in future.he most common cause of a lacunar infarct is high blood pressure. Causes. The primary cause of a silent stroke is thrombosis, which is a blockage of an artery in the brain caused by a clot.