If not, you typically don't. For this, a general rule of thumb is that brain cells begin to die after approximately 4-6 minutes of no blood-flow. After around 10 minutes, those cells will cease functioning, and be effectively dead. That said, there are some exceptions to that rule.
https://gizmodo.com/how-long-does-your-heart-have-to-stop-for-before-you-ca-1457981280
Plaques can grow large enough to significantly reduce the blood's flow through an artery. But most of the damage occurs when a plaque becomes fragile and ruptures. Plaques that rupture cause blood clots to form that can block blood flow or break off and travel to another part of the body. This is called an embolism. If a blood clot blocks a blood vessel that feeds the heart, it causes a heart attack. If a blood clot blocks a blood vessel that feeds the brain, it causes a stroke.
http://www.heart.org/HEARTORG/Conditions/HeartAttack/PreventionTreatmentofHeartAttack/Aspirin-and-Heart-Disease_UCM_321714_Article.jsp
With this in mind, let's take a quick look at some of the most common things to consider when trying to resuscitate someone, and how long you would try to revive them in those situations. The first, and most important thing to consider is the point of trying to revive the heart in the first place- that's to supply the body, and most importantly brain cells, with adequate blood flow.
https://gizmodo.com/how-long-does-your-heart-have-to-stop-for-before-you-ca-1457981280
By the time baby is three or four days old, your blood flow should start to become more watery and pinkish in color. By 8-10 days after delivery, your blood flow should be mostly yellowish-white in color. If your flow had subsided but it becomes bright red and heavy again, it could be your body’s way of telling you that you are overdoing it.
http://cindyandjana.com/vaginal-birth-recovery-top-10-answers-you-need-to-know/
Here are the answers to the top 10 questions women ask after a vaginal birth. (We answer the top questions after a C-section in this post.) 1) How long will I bleed? Blood flow can last for up to 6 weeks after baby’s birth but for most women, it will subside sooner. For the first few days after baby’s birth, your blood flow will be bright red and about as heavy as your menstrual period.
http://cindyandjana.com/vaginal-birth-recovery-top-10-answers-you-need-to-know/
Most Popular Reads. 1  Vaginal Birth Recovery: Top 10 Answers You Need To Know. 2  Top 10 Things That Can Freak You Out When You Have a Newborn Baby. 3  Bleeding After Birth: What’s Normal and What’s Not. 4  How to Breastfeed: Getting a Deep Latch. 5  How to Wake a Sleepy Baby to Feed. 6  How to Avoid Nipple Confusion for the Breastfed Baby.
http://cindyandjana.com/vaginal-birth-recovery-top-10-answers-you-need-to-know/
No blood flow would have been getting to the brain and thus after around 10 minutes, it would be futile in most cases. Unless of course you were going to attempt the resuscitation for the purposes of providing organ donation, then maybe.
https://gizmodo.com/how-long-does-your-heart-have-to-stop-for-before-you-ca-1457981280
The question of how long someone's heart would have to be stopped for before you can safely say that regardless of what you do, you're not going to be able to revive them is avery tricky question. It's not as simple as saying after 10 or even 20 minutes there's no hope.
https://gizmodo.com/how-long-does-your-heart-have-to-stop-for-before-you-ca-1457981280
Because aspirin thins the blood, it can cause several complications. Talk to your doctor if any of these situations apply to you. You should not take aspirin if you: Most heart attacks and strokes occur when the blood supply to a part of your heart muscle or brain is blocked.
http://www.heart.org/HEARTORG/Conditions/HeartAttack/PreventionTreatmentofHeartAttack/Aspirin-and-Heart-Disease_UCM_321714_Article.jsp
Cindy and Jana are Registered Nurses and International Board Certified Lactation Consultants who have assisted over 20,000 families. 1  Download their free ebook: 5 Crucial Ways to Prepare for Breastfeeding. 2  Sign up for their free mini breastfeeding course: Getting Ready to Breastfeed.
http://cindyandjana.com/vaginal-birth-recovery-top-10-answers-you-need-to-know/
how long can it take for blood flow to stop after baby
Blood flow can last for up to 6 weeks after baby’s birth but for most women, it will subside sooner.