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 silent heart attack is a heart attack that has few, if any, symptoms. You may have never had any symptoms to warn you that you've developed a heart problem, such as chest pain or shortness of breath.Some people later recall their silent heart attack was mistaken for indigestion, nausea, muscle pain or a bad case of the flu.The risk factors for a silent heart attack are the same as those for a heart attack with symptoms. The risk factors include: 1  Smoking or chewing tobacco.2  Family history of heart disease. 3  Age. 4  High cholesterol. 5  High blood pressure. 6  Diabetes. 7  Lack of exercise.ome people later recall their silent heart attack was mistaken for indigestion, nausea, muscle pain or a bad case of the flu. The risk factors for a silent heart attack are the same as those for a heart attack with symptoms. The risk factors include: 1  Smoking or chewing tobacco.