The EMT should suspect abdominal aortic aneurism. It is a condition where the lower part of the aorta is enlarged. The aorta is the main blood vessel that is supplying blood to the whole body. It runs from the heart to the abdomen. The cause for developing this is not certain, however, it is associated with tabacco use, high blood pressure, atherosclerosis, infection and genetic factors.
Your answer would be depressants. Such as alcohol.
Pros of using email messages is no one knows your number. By knowing your number then they have access to your area code and can eventually find out where you are located. A con of using email messages you cannot call someone and hear their voice.