Hello, I am currently in the process of drafting my med school admissions essay and was wondering if anyone could help me edit it, and perhaps tweak the essay and give me some suggestions to add and things to change, etc, so that i can bring out the full essence of my writing and win-over the affection of a cold-hearted med-school admissions official. Also, i do not have a solid ending and don't know what to write for a solid concluding paragraph. MY essay is posted below:

He staggered over the table, arms jammed against the surface, drew hungrily for air, and promptly collapsed into unconsciousness in the grip of cardiac arrest. Nobody, not me, nor my friends, were ready when Ali, an overweight acquaintance of mine, suffered a heart attack at dinner. For a few seconds, we did nothing. Seconds turned into eternities as we stared at our friend dead on the table, nonresponsive, left without any possible recourse to save his life.
By the grace of some deity, a doctor at a nearby table immediately responded and administered CPR to Ali. He was resuscitated in a few minutes. The EMTs said it was a miracle; CPR alone only revives a tiny fraction of its recipients. After he was revived and thanks was given to the doctor who saved his life, I was struck with one of the greatest bouts of depression I have ever had to face in my life.
How could I, the son of a neurologist, not have the ability to save the life of a person dying right in front of me? Helplessness is watching your friend die right in front of you as you panic and pray to every God out there for some help. If that doctor wasn’t there that fateful night, I would have had to identify Ali at the morgue. I had always trotted through life, taking it for granted, viewing it as an unstoppable and unbreakable force which would never be sapped-out of anyone close to me. How wrong I was…
It was on that night that I made a promise to myself that never again would I stand aside, lost for words, as those around me had the life sapped out of them.
I promptly enrolled in a CPR course in the hope that if I were ever in a similar situation, I would have the power to save a life. After learning CPR, I began to develop an interest in the field of Medicine, the science of maintaining and protecting life. As the years passed by, I became deeply intrigued in the study of medicine and I promised myself that I would become a physician so that I could do everything I could to protect and shelter people from the cold maw of death.
Doctors are the guardians of life. Whenever our bodies malfunction and need to be repaired, doctors are always there to fix what’s wrong and get things working as they should. Without these guardians of humanity, our species would surely perish from the face of the Earth as untreated infections turn into death sentences, and repairable malfunctions such as syphilis and appendicitis kill us from the inside-out. If it weren’t for these modern-day saints, the average life expectancy would be in the 30’s and we would descend into the days of the stone age.
In the Burnett Medical Scholars program I plan to dedicate every cubic centimeter of my being to the study of medicine; saving lives. I hope to use the program to further my knowledge of medicine and, one day, become worthy of holding the title of doctor, protector and savior of life. Humanity walks a fragile line between the world of the living and the abyss of the dead, with only modern medicine to protect mankind from plummeting into that abyss.
I never want to be that helpless bystander again. When death comes before his time is due, i'll face him head-on, stethoscope in hand, and stymie his foul deed.