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.
Symptoms of a silent heart attack. âJust like the name implies, a silent heart attack is a heart attack that has either no symptoms or minimal symptoms or unrecognized symptoms,â says Deborah Ekery, M.D., a clinical cardiologist at Heart Hospital of Austin and with Austin Heart in Austin, TX.ilent Heart Attack: Symptoms, Risks. by Kate Silver. A heart attack does not always have obvious symptoms, such as pain in your chest, shortness of breath and cold sweats.