dr. sanjay gupta.he right side of the heart pumps blood to your lungs while the left side pumps it back to your body. it's the critical center of life in our bodies but it's also vulnerable to disease. in the united states, the american heart association says heart disease impacts someone every 42 seconds. in the middle east, it's the leading cause of death. that's why the focus on treating patients with heart disease is top priority. for surgeons in abu dhabi a robot is lending a helping hand. >> reporter: this doctor dedicates much of his life to treating the human heart. >> i knew i wanted to be a heart surgeon, because in heart surgery we seem excellence every day. and we're always pushing ourselves to advance the field of heart disease and heart care and heart surgery. >> reporter: the doctor is the chief of cardiovascular surgery at the cleveland clinic in abu dhabi. a region where heart health is an increasing concern. cardiovascular disease accounts for 30% of deaths in the uae, and 45% of deat

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dr. sanjay gupta. habits can become so engrained we often don't realize we're even doing them. you can thank your brain for that, specifically the basil ga ganglia. once a task becomes second nature brain essentially shuts down. out of all the habits we have eating is probably one of the most retune. you may not impact how much your environment is having an your eating habits. does this look familiar? the tv is on. you're engrossed in a show and you have snacks in your hand. before you know it, all the chips are gone. in this age of binge watching, research shows that mindless eating is on the rise. >> habits become so automatic to some extent that our environment ends up facilitating a good habit and ends up facilitating a bad habit. >> this group of college students is actually part a study. it's all the brainchild of a professor, researcher, author. he's dedicated much of his career to observing our eating habits. >> if you take the time to control your environment, how much of an impact can that have on mindless eating? >> we suspect, based on our research, simply controlli

dr. sanjay gupta joins us. understand the initial rules, in the awful days, the height of the epidemic. but there's testing now, straight people who had sex in the last 12 months can give all the blood they want. >> the original rules were a lifetime ban, and in december last year, not that long ago said they're going to make it 12 months. it doesn't follow logic. >> is it tested? >> it is tested regardless of the donor. it doesn't make a lot of sense. and i'm point out after a tragedy like this happens, a lot of people give blood, they had enough blood at a place like this to take care of the tremendous need, but that's not typical. typically not enough people give blood. only 10% donate at any given time. this can be a significant deal. >> is this something the fda, they changed that policy to make it 12 months, now they can give blood. from a medical standpoint, doesn't make sense. >> it doesn't make sense. i think you heard from the scientist there and hearing from people at the broad institute in massachus

dr. sanjay gupta. >> it's almost like time stopped. there were still things back on tv playing.s blinking, drinks, checks about to be paid, food half eaton. that's not even thinking about the bodies on the ground. when you actually see everybody lying down in one place or their final positions, you can feel it. >> in addition to police, fire, ems, there is always nothing team that responds to tragedies, like dr. joshua stephanie. >> when i heard the number 11 or 12, from one shooting, i said, that's a lot. our normal staff can handle it. as the morning went on, more texts and more calls, i realized the scope of the disaster or the event. numbers were starting to come in, 20 at the nightclub, 30 at the nightclub. >> for all of the victims, figure out cause and manner of death. that's his job. surprisingly, the answers aren't always obvious. >> law enforcement can recreate what happened. we need to get the projectiles. >> you can't say for sure, a metal jacket. a hollow tip. all for one. >> not from the fragments we recovered. >> dr. stephanie is still piecing together the fragmen

dr. sanjay gupta. the sheriff saying that lane graves' body was found intact and there will be an autopsy. does it say anything to you that the body was found intact? >> well, you heard the sheriff say that the cause of death was drowning which is what you would expect but they want to see if there is water within the lungs, things like that. so that's going to be identification that has been made. that's typically. but first the job of a medical examiner and now the autopsy is going to answer some of those questions. also, any marks on the body will help identify which particular alligator as well. that's information that the medical examiner can help provide to the wildlife folks to try and identify the particular alligator. cause and manner of death is something that they are going to spend time and should have a conclusive answer about. >> dr. sanjay gupta, thank you so much. let's bring back dino ferri, an expert on the behavior of reptiles. did you hear anything notable, anything that surprised y

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dr. sanjay gupta. habits can become so engrained we often don't realize we're even doing them.your brain for that, specifically the basil ga ganglia. once a task becomes second nature brain essentially shuts down. out of all the habits we have eating is probably one of the most retune. you may not impact how much

dr. sanjay gupta here in orlando.t inside the hospital where some of these injured are now fighting for their lives. hear what happened in the frantic moments inside the hospitals. how did they handle the influx of victims? i'm brooke baldwin. you're watching cnn's special live coverage. >>> i have friends here at pulse and orlando who suffered physically and emotionally. and now, mentally because this day is never going to be forgotten. this is a wake-up call for everyone, you know, you don't know when you see the person for the last time. >> welcome back to our special cnn coverage here of the worst terror attack in america since 9/11. i'm brooke baldwin. thank you so much for being with me here. this entire community i think is still walking through this. still very in shock. in mourning. will be for sometime to come after the shootinging inside the pulse nightclub there. if you can see the black sign over my left should. half a block away as we learn the identities of a number of victims, also learning their stori

dr. sanjay gupta spoke with him. it is rare that you hear from the medical examiner. >> he wanted to talk about this. they moved very, very quickly as you know. they want to identify the bodies, do the autopsies, out of respect for the families that are waiting. but this is a veteran medical examiner, aviation disasters, never seen anything like this. he was on the scene, i asked him to describe it. take a listen. >> almost like time stopped. there were still things, lights blinking, drinks poured, food half eaten, and that's not even thinking about the bodies on the ground and just looking around, it is like time stood still. all of a sudden everything is gone, stopped. when you see everyone down in one place or the final positions, you can feel it. >> over the years i talked to medical examiners, they're the people caring for the dead before the families and dignity is so important to them, even in placement of the bodies. >> no question. >> he talked to you about that. >> he did. he had an area where they did the

dr. sanjay gupta, talking about the hospital staff.d and recaall really pulling together. >> they worked for two days without going home. 26 operations in a few hours after the shooting occurred. also, the ems folks. we heard a lot about patients bringing themselves in. no question there was paramedics and people on the scene and you just hear from the stories, it lasted for a long time. we have covered a lot of tragedies and most of them over in a few minutes. >> most of the -- frankly, an active shooter situation, some of the fatalities in the fbi statistics, first five to six minutes. >> this was a few hours and think of the challenges for the ems folks. many of them to go in with law enforcement into areas of people hurt. and they needed to get there quickly with an active shooter situation. they were doing things as they told me like tourniquets. we use them all the time. here they were taking on a different role. only thing to do for a period of time to pull these poirnts out of that active shooter situation. using things that th

dr. sanjay gupta and his team got access in the hospital where staff have been working around the clock to> said there was a gunshot wound coming in, said there were maybe a few more, the initial report was 20 gunshot wounds coming our way. one patient came in, another patient came in, then i realized this was not a drill. >> reporter: trauma surgeon smith, cheatham, abraham operated almost nonstop since the shooting. >> up to six rooms in 90 minutes, 44 gunshot wounds, victims come in all within a space of an hour and a half, two hours. certainly exceeded anything we've ever seen before. >> reporter: 26 operations were performed in the first few hours. injuries so devastating one patient alone requiring four separate operations. 90 units of blood and counting. >> patients were being wheeled into the area, they had about a dozen people surrounding them, physicians, nurses, pharmacists, anybody that could lend a hand, they would make a determination was the patient going to survive, was the patient going to need surgery, how quickly was the operation necessary. how much blood was the patien

dr. sanjay gupta joins us now.s remarkable to realize just sort of how many people are working on people like patience and on other survivors. i mean, it takes so many people, there's so many multiple wounds at times. >> from the moments they literally entered the hospital, there's been all sorts of nurses and therapists. the psychological impact, what you're hearing is survivor's guilt combined with post traumatic stress. this can be individualized. it could be very powerful and surprising to the person who experiences it. they don't quite now how to describe it at first. even people outside of the club, people who just live in this community can also have a competitive survivor's guilt. they lived when others did not, typically in situations where people are targeted, for example, something like this versus a natural disaster, survivor's guilt is going to be more common. >> it's interesting. you and i have been in a lot of places where a lot of terrible things have happened. i often get a lot of questions from fr

dr. sanjay gupta.se and worse. what was it like for these surgeons? >> well, you know, i think they initially didn't know what really to expect. there was a doctor on call. he gets a call and says there's a couple of patients coming in initially. and that's not unusual for orlando. you might have a night where you have a couple of patients who have gunshot wounds. but then it was more and more, and at some point he had to make a decision. first of all, it's not a drill. this is real life. i need to call for backup. so he called two more surgeons. they called for three more surgeons. eventually there was at least six surgeons operating. they did 26 operations in a relatively short amount of time. so they were taking care of these patients, triaging the patients, triaging the blood. they needed to make sure they had enough blood. triaging the other resources that were necessary. so it's something that you think about. you try and practice for. but real life is always going to be a little bit different. >

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dr. sanjay gupta has the hair rowing stories of survival. >> we started running -- >> you're lfistening todescribe the scene. >> i was shot three times in my leg so i had fallen down. i tried to get back up but, um, everyone started running everywhere. i got trampled over and i shattered and broke the bones in my left leg. >> unable to move, he just lays there waiting. >> all i could hear was the shotgun, one after another and people screaming, people yelling for help. >> in a cold, calculating move, the gunman seemed to zero back in on the victims. >> i hear him come back and he's shooting everyone that's already dead on the floor, making sure they're dead. >> he closes in. >> i can hear the shotguns closer and i look over and he shoots the girl next to me. and i'm just there laying down. i'm thinking i'm next, i'm dead. so i don't know how but by the glory of god, he shoots towards my head but it hits my hand. and then he shoots me again and it hits this side of my hip. i had no reaction. i was just prepared to just stay there laying down so he won't know that i'm alive. >> he's finally

dr. sanjay gupta. what struck you? we learned about the nature of the injuries. miraculous on the one hand but also exactly how they practice it on the other. >> right. and they made a lot of mention of these drills that they do and these practice routines, but they also said as you heard i'm sure, john, you can practice all you want, but nothing prepares you quite for this. it wasn't just so many patients, but again, as you mentioned, so many wounds on those patients. multiple gunshot wounds to those patients. these bullets, both large caliber and small caliber, they were making a point of this, about they tend to tumble once they get inside the body. why is that important? because where the entry wound is is where you sort of focus your energy but if the bullet starts to move around in the body, you don't know exactly where it is, what kind of damage it's caused. so a patient can appear stable one moment and then start to have significant declines. they talked about one patient who had four operations, needed 90 units of blood. again, they had 44 patients they

dr. sanjay gupta joins me now. you spoke with the doctor involved here. >> look, he's a veteran. he's seen a lot of things. he's been doing this a long time and even mass casualties, aviation disasters, natural disasters, and i asked him to describe it. how he would describe it to other people. here is what he said. >> it's almost like time stopped. there was still things, break ground tv is playing, lights blinks, drinks that had just been poured, checks about to be paid, food half eaten, and that's not even thinking about the bodies on the ground. but when you actually see everyone lying down in one place or everyone down in one place or their final positions, you can feel it. >> it was really important, john, for him to have all the bodies identified as quickly as possible, have the autopsies performed within a day after that. out of respect for the families. there's no exact protocol or sort of time line for these sort of things, but they moved very, very fast to do this. i'll share something else with you that i thought was poignant was the shooter was transported separately

dr. sanjay gupta is joining us now.ay, talk about what kind of injuries we're seeing here, how the hospitals are coping. >> reporter: well, sadly, wolf, so many hospitals around the country do training exercises nowadays for this sort of thing. i guess it's the world in which we now live. the types of injuries that we're hearing about, we have talked to people at orlando regional medical center, it's the only level 1 medical center in that area. so that's where the vast majority of patients would go and the vast majority are gunshot wounds to the trunk, meaning the chest and abdomen and also to the extremities. we did not hear of gunshot wounds to the head, for example, that came to the hospital, likely because those patients did not survive. we know, as you have been pointing out, wolf, many patients came to this one hospital, orlando regional medical center. and let me just give you a little bit of an idea, the level 1 means a trauma surgeon on call at all times with operating rooms available. they have a certain amou

dr. sanjay gupta shares their stories. >> we just grabbed each other and started running. >> reporter: you'reg moments after he was shot. >> i was shot about three times in my leg, so i had fallen down. i tried to get back up, but everyone started running everywhere. i got trampled over and i shattered and broke my bones on my left leg. >> reporter: unable to move, angel lays there waiting. >> all i could hear is the shotgun, one after another and people screaming, people yelling for help. >> reporter: in a cold calculating move, the gunman seemed to zero back in on the victims. >> i hear him come back and he's shooting everyone that's already dead on the floor making sure they are dead. >> reporter: he closes in on angel. >> i can hear the shotgun is closer and i look over and he shoots the girl next to me and i'm thinking i'm next, i'm dead. so i don't know how but by the glory of god he shoots towards my head but it hits my hand and he shoots me again and it hits the side of my hip. i had no reaction. i was just prepared to just stay there laying down so he won't know that i'm alive. >> re

dr. sanjay gupta with this week's "turning points." >> i had doubts in myself to join "dancing with the starsent ahead and just failed in the first week, that means people would view deaf people as people that can't dance. >> but he didn't fail. he won. >> i'm a model, an actor and an activist. i was raised in a family that was completely deaf. two brothers. parents. grandparents. great grandparents. it is genetic so i really consider myself very fortunate. my whole family knows sign language. i went to the only university in the whole world for the deaf. my goal was to become a math teacher. >> "switched and birth" and "america's next top model" both found me. >> being on a reality show wasn't easy. >> i had to live with the models. i couldn't really communicate with anybody. just remained optimistic. i was like i'm going to win this show. >> and he did. demarco's next goal, to help other deaf people gain access to american sign language. >> there are 70 million deaf people in this world and only 2% of them have access to sign language. to deaf kids, they should always find the ability in a

dr. sanjay gupta who joins me. what did you learn? >> he found about this the same way many people did. morning is when he first heard about this and eventually went down to the scene. it's important for the medical examiner and the law enforcement to be there. he told me it was really important for him to basically be able to identify these bodies by monday afternoon, several bodies. it was important to have the autopsies completed by tuesday afternoon. so they worked really fast. when you hear about a state of emergency being declared, part of the reason it's declared is for the medical examiner's office to get assist. >> speed is important for the families? >> yes. he lives in the community and he was touched by this. it's different from mass casualties from natural disasters or airplanes. these were families who pretty much lived in this area. one thing he told me that i thought was very respectful and interesting was that there are several buildings over there. 49, the victims, all were cared for in one building. they had their autopsies and identification in one building, the shoo

dr. sanjay gupta about that, and we await a press conference from the hospital. of the victims they treated are expected to people. we'll be right back. when cigarette cravings hit, all i can think about is getting relief. only nicorette mini has a patented fast-dissolving formula. it starts to relieve sudden cravings fast. i never know when i'll need relief. that's why i only choose nicorette mini. >>> good morning, i'm carol costello, live in orlando, florida. just behind me is the scene of the deadliest terror attack since 9/11. >> i'm erin burnett, live at the hospital. a source of in spr ratispiratio heroically reacting to a scene in the midst of war, carol. >> let's get to the investigation. investigators in orlando are piecing together the dark and disturbing past of the man behind the worst u.s. terror attacks, since 9/11. witnesses say he was a frequent visitor to the same gay nightclub where he killed 49 people, one club goer estimated he was there twice a month for the last three years. the l.a. times is reporting that the shooter reached out to a man

dr. sanjay gupta. >> it's almost like time stopped.re about to be paid. and that's not even thinking about the bodies on the ground. but when you actually see everyone lying down in one place or went down in one place or their final positions, you can feel it. >> reporter: there's always another team that responds to tragedies. the medical examiner's, like this doctor speaking about this for the first time. >> when i heard the number of 11 or 12 people deceased at the hospital from one shooting, that's a lot. but our normal staff can handle it. as the morning went on and i got more texts and calls, then he realized the disaster of the -- the scope of the disaster. >> reporter: for all of the victims, figure out cause and manner of death. that's his job. surprisingly, the answers are not always obvious. >> so law enforcement can recreate what happened. we need to get the projectile. we need to tell them the entry patterns, you can't say for sure, full metal tip, hallow -- >> not from the fragment right there. >> reporter: he's piecing t

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dr. sanjay gupta has his emotional story. >> we just grabbed each other.ning. >> reporter: you're listening to 26-year-old angel colon describe the horrifying seconds before he is shot by the gunman sunday morning inside pulse nightclub in orlando. >> i was shot about three times in my leg. so i had fallen down. i tried to get back up, but everyone started running everywhere. i got trampled over, and i shattered and broke my bones on my left leg. >> reporter: unable to move, angel just lays there, waiting. >> all i could hear was the shotgun, one after another, and people screaming, people yelling for help. >> reporter: in a cold, calculating move, the gunman seemed to zero back in on the victims. >> i hear him come back, and he's shooting everyone that's already dead on the floor, making sure they're dead. >> reporter: he closes in on angel. >> i can hear the shotguns closer, and i look over, and he shoots the girl next to me. and i'm just there laying down. i'm thinking i'm next. i'm dead. so i don't know how, but by the glory of god, he shoots towards m