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 heart attack can occur without typical symptoms. Silent heart attack is also referred to medically as silent ischemia (lack of oxygen) to the heart muscle.Symptoms can be so mild that the heart attack goes unrecognized.There may be no symptoms at all.ymptoms. Symptoms of a silent heart attack are often present but unrecognized. They can be very mild, but pinpointed with careful history taking by your physician. Episodes of mild indigestion, dizziness, weakness, sweating and sudden fatigue may be related to unrecognized heart attack.