About 90% of people who suffer a heart attack survive if they arrive at the hospital alive.  Many heart attack fatalities occur because victims fail to receive swift medical attention, and their failure to do so is often caused by their own hesitation to act. If you feel any of the above symptoms, don't try to wait them out. Call 9-1-1 (or your country's equivalent emergency telephone number) to get help immediately.  While it's true that the symptoms could be harmless if you are indeed suffering a heart attack your life depends on getting medical attention as quickly as possible. Don't be afraid of being embarrassed or wasting the doctors' or paramedics' time – they will understand. Emergency medical personnel can begin treatment as soon as they arrive, so calling for emergency assistance is the fastest way to get help during a heart attack. Don’t drive yourself to the hospital. If medical personnel can’t reach you in good time, or if there are no other emergency options, have a family member, friend or neighbor drive you to the closest emergency room. If you're around family or out in public when you believe you may suffering from a heart attack, let people know. If your situation worsens, your life may depend on someone giving you CPR, and you're more likely to get effective help if people know what's going on.  If you're on the road, stop the car and flag down a passing motorist, or call 9-1-1 and wait if you are somewhere where paramedics can quickly reach you. If you're on an airplane, notify a flight attendant immediately. Commercial airlines carry medication on board that may be helpful, and the flight attendant can also find out if there's a doctor on the plane and perform CPR if necessary. Pilots are also required to detour to the nearest airport if a passenger is having a heart attack. If you cannot get to medical attention quickly, try to remain calm and do as little as possible. Sit down, rest and wait for emergency medical services to arrive. Exertion can strain your heart and can worsen the...

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Write a summary of the previous text in Vietnamese:
Nhanh chóng tìm đến trung tâm chăm sóc y tế. Thông báo rằng bạn đang lên cơn đau tim. Hạn chế sự hoạt động. Nếu được, hãy uống một viên aspirin hay nitroglycerin (theo chỉ dẫn định trước của bác sĩ).