this post was submitted on 29 Dec 2023
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As a critical care nurse, the miraculous CPR recoveries are such a horrible disservice to our patients and their families. CPR is not two minutes of some light exercise and then the person wakes up and is ok forever.
It's 20-30 mins of intense, brutal, scary, undignified activity followed by best case scenario, we put you in the ICU, deliberately make you hypothermic for a day or two, and hope you wake up. That increases your chances of surviving the incident to a whopping 64%.
Surviving to discharge and having a meaningful recovery is a whole other ballgame, and depends a lot on the condition you were in when you had cardiac arrest in the first place. Your elderly grandpa with cancer, sepsis, bad kidneys, etc. is probably not going to go home. Your middle-aged wife who came in because she was having a heart attack actually stands a good chance.
Movies like to show people shocking a flatlined patient who just pops up and walks away when in reality presenting fully flatlined means you're 2-3 times less likely to be resuscitated at all.
I'm happy to leave some leeway in fictionalized depictions of medical care for the sake of story progression. But the complete ignorance currently common in fictional resuscitation scenarios feeds a really malignant sort of magical thinking that keeps us torturing elderly people. I'd really appreciate less of that in my job.
I heard that Defibrillators too don't work on stopped hearts - only weak pulses, and if you're hit with one you're not standing up instantly even if you wanted to. It's days maybe weeks of recovery
Can anyone confirm?
Yes, a stopped heart shows up as a flat line with no activity on an EKG. We don't shock people when their hearts have completely stopped because it doesn't do anything and can actually damage the heart. Defibrillators are named that because they're intended to shock a heart that is in a chaotic electric rhythm called fibrillation where the heart is just kind of shivering instead of beating fully.
If a person has flatlined, you can do CPR and administer epinephrine, and if you're extremely lucky get their heart to start fibrillating so a shock might have a chance of being effective at restoring a normal heart beat. This is why someone whose heart has stopped completely is 2-3 times less likely to survive CPR than a person experiencing fibrillation.
Thanks for the helpful info! Didn't know about fibrillation so this was very educational. I previously assumed that defibrillators were for flatlined hearts 😳
Great reply there already, I just want to add that a timely defibrillator shock can have the patient go from unconscious without a pulse to alert and talking very quickly, provided that the time between the start of the shockable rhythm and the shock is relatively small.
Nowadays we have AED devices in many public places that any bystander could attach to a patient receiving CPR, the machine will analyse the rhythm and deliver a shock if needed.
From what I understood, defibrillators basically stop the heart, letting it restart on its own in a proper rhythm.
You are correct, and we actually also use them on people who are not actively dead, but are having a bad heart rhythm that is causing intolerable symptoms.
The shocking dead people to resuscitate them thing, the part that everyone is familiar with, is when the ventricles of someone's heart have started quivering in a chaotic rhythm called ventricular fibrillation or vfib. If someone is experiencing vfib, they're actually dead because vfib invariably degrades into full stop flatline very quickly. Shocking someone in vfib briefly stops their heart in hopes that it will reboot itself into a rhythm that is compatible with life.
But the right atrium can also fall into fibrillation. You've heard about this on TV (if you're in the US); we call that afib. Afib is compatible with life, because the ventricles are the main part of the pump and can continue to beat even if the right atrium goes a little haywire. But often that beating isn't very effective and people will experience low blood pressure and shortness of breath. And the right atrium isn't clearing blood out of itself effectively in afib, which can cause the blood to clot in the heart and lead to a stroke if a piece of clot breaks off.
So, you may be thinking to yourself, wait, ventricular fibrillation we use a defibrillator, so what about atrial fibrillation, and that is correct, we can use a defibrillator to shock someone in afib, reboot their heart, and hope they go back into a normal, more effective rhythm. (We do mildly sedate people before doing that lol.) Sometimes that works, sometimes we have to just control afib with meds and we have to keep them on blood thinners to prevent a clot in the heart.
And lastly, there's a more complicated heart rhythm called Supraventricular Tachycardia or SVT that sometimes also responds to being shocked. We try a couple of other treatments first for SVT, but shocking can work. And again, people are mildly sedated for that.
As a CPR/first aid instructor I'd be happy if we could just get a few good CPR depictions. Hard surface, proper compressions WITH counting out loud, maybe do an ABC assessment to begin with... And if we for once could get compressions on a bare chest, that'd be great.
Not looking for an instructional video when watching Reacher. Realism is OK, and people not knowing CPR is unfortunately real, but maybe medical dramas could get it right.
Learned a lot there. Thanks!