Damar Hamlin may have suffered freak ‘one-in-200 million’ injury that shuts off blood to brain

Damar Hamlin may have suffered a one-in-200 million heart injury that shut off blood to his brain and triggered a cardiac arrest, doctors say.

The Buffalo Bills safety, 24, collapsed during Monday night’s game against the Cincinnati Bengals and was administered CPR on the field.

This morning the Bills revealed Hamlin had suffered a cardiac arrest and that his heartbeat was restored on the field. He has been taken to hospital, where he remains in a critical condition.

Doctors believe the blow to the Buffalo Bills star’s chest threw his heart’s pumping mechanism out of rhythm, disrupting blood flow around his body and shutting off his brain, known as ventricular fibrillation.

But to make matters worse, experts speculate this may have happened during a very vulnerable moment in the heart’s electrical cycle, triggering a condition known as ‘commotio cordis’. 

This occurs when something makes contact with the chest wall precisely when the heart’s lower chambers start to refill with blood. The impact then causes the rapid and disorganized contraction of the heart’s lower chambers, disrupting the normal pumping of blood around the body.

This window is only 20 milliseconds long, making commotio cordis incredibly rare. Just 30 people a year suffer the injury worldwide and only around 200 cases have been reported among Americans. It has previously been noted in young baseball or hockey players who receive a blow from a baseball or hockey puck to the center of their chests.

The critical question, doctors say, is how long Hamlin’s brain went without the oxygen carried to organs by blood flow.

Brain tissue dies rapidly when deprived of oxygen, which could leave permanent injuries.  

But there is hope for Hamlin. About nine in 10 people who have cardiac arrest outside the hospital die. 

But CPR can help improve those odds. CPR can double or triple a person’s chance of survival if it is performed in the first few minutes of cardiac arrest.

Survival rates drop to three percent when resuscitation is delayed beyond three minutes, medics say. 

Dr Deepak Bhatt, a top cardiologist at Mount Sinai Heart in New York City, told DailyMail.com that Damar Hamlin had likely suffered commotio cordis.

‘The first thought that occurred to me was that it was something called commotio cordis,’ he said.

‘It really refers to the classic situation of injury to the chest.

‘This is usually in baseball when someone hits a line into the pitcher’s chest and that sudden impact can trigger abnormal heart rhythms.

‘The only way to come out of that is to deliver an electric shock and perform CPR.’

Asked why the player was able to stand up moments afterwards, he said: ‘It could be the case that for a couple of seconds there was enough blood getting to the brain.

‘When the heart stops beating we lose consciousness within a matter of seconds, those may have been the few seconds before the brain stopped getting enough blood.’

Dr Bhatt said it would be 24 to 48 hours before doctors could say how the player was, after they had completed a battery of tests.

‘People may be out cold for that long, and the heart and brain function can take a good 24 to 48 hours to recover,’ he said.

In the best case scenario, patients may be in hospital for at least a week to ten days, he said. In worse cases this will be longer.

Asked whether the player could return to the pitch in the coming months, Dr Bhatt did not rule it out but said this was a ‘much, much more complex question’.

‘[Assuming minimal damage to the player], [doctors] would want to do a lot of testing,’ he said.

‘This would include some sort of a stress test on a treadmill, with exercise under monitoring circumstances to make sure the same thing does not happen again.

‘It would not be unexpected to also do a stress test pushing them to the limits and just making sure nothing bad happens.’

Doctors that spoke to DailyMail.com emphasized that commotio cordis is an extremely rare condition.

Dr Bernard Ashby, a vascular cardiologist who previously worked at Columbia University Medical Center in New York City, said: ‘The video of Damar Hamlin from a cardiologist’s perspective resembled commotio cordis — a phenomenon that occurs when a sudden blunt impact to the chest causes cardiac arrest.

‘Timely defibrillation is life saving and prevents anoxic brain injury. I pray an AED was near.’

Dr Chris Haddock, a primary care physician at the Erlanger Health System in Georgia, agreed with the diagnosis.

He wrote on Twitter: ‘As a physician I believe Damar Hamlin was likely suffering from commotio cordis where a blow to the chest at a precise moment in the electrical cycle stops the heart.’

He added: ‘Those trying to tie this to vaccine status to project their unscientific beliefs are terrible, horrible people.’

Dr Anthony Cordillo, an emergency medicine expert in Los Angeles, California, suggested to ABC7 that the player had suffered a ventricular arrhythmia.

He told the broadcaster: ‘This is a phenomenon that as the heart is going between its beats, as that heart is depolarising and then repolarizing, if you have traumatic trauma to the chest at a very specific moment as that heart is repolarizing itself, then you can go into a lethal ventricular arrhythmia. 

‘And that looks like what happened because he was able to stand up and at that point his heart started what we call fibrillating, that’s that cardiac arrest where he collapsed back down. 

‘And they would have recognised at that point the odd pulse.’

He ruled out an injury where the aorta — a major blood vessel — was severed, because people suffering that type of injury do not get back up.

Other doctors have suggested that the violent contact may have caused a bulge in a blood vessel — medically termed an aneurysm — to burst.

It may have combined with a previously undetected heart defect to trigger a life-threatening event, among other possibilities, they added.