As I walked out of the funeral home into a bright, sunny afternoon, it struck me that she could have been a case I was reading, yet another electroencephalogram (EEG) that I would sigh over and write my report on. As a neurologist, I interpret these readouts every day — diagnostic tests that measure the electricity of the brain. And for the past few years, I've been watching the results change as the opioid epidemic has taken its toll.
What the EKG is to the heart, the EEG is to the brain. Scalp electrodes translate neurological activity into waves, cerebral squiggles that show how well our brain machines are working. Rhythms in alpha, beta and delta reflect our states of mind: awake, asleep, seizing, sick or dead. A decade ago, neurologists like me would study these sketches on paper; now, as with everything, we read them on a computer. From the comfort of my office, I read studies from multiple hospitals, often miles away from the patients, and interpret the results to assist in diagnosis.
There is a certain beauty in the electricity of the brain. While awake, a waxing and waning sinusoidal rhythm predominates from the back of the brain. During sleep, faster beta rhythms called spindles appear, as well as larger complexes over the center of the brain called vertex waves. In a seizure, the brain produces an electrical storm, sharp waves or spikes that can spread to the whole cortex. The sick brain tends to slow down. The anoxic brain, gone too long without oxygen, looks different. The EEG may show a "burst-suppression" pattern — where brain cells fire in fruitless overactivity, then fade again — or only flat lines. This is the intra-cerebral silence of brain death.
Seeing this is part of the job, and neurologists' medical training instills in us a certain emotional detachment so we can look at unfortunate, but routine, results: an elderly man with the right side of his EEG slowed from a stroke, or a woman with dementia who is brain-dead after a heart attack. We are electrical beings, after all, and eventually, we run out. Still, we're also human, with brains wired for empathy, and sometimes I can't help but feel the sadness radiating through the flat lines of these EEGs. The hardest ones are the unexpected cases: A toddler with a flat rhythm after two hours in a pool. A teenager with a low voltage slowing after hanging from a light fixture in her bedroom. Luckily, these cases are rare.
But lately, thanks to America's opioid crisis, the tragedies are coming at a faster pace. In New York state, where I practice, overdose deaths involving opioids ticked up from 1,604 per 100,000 people in 2013 to 2,185 in 2015. In 2010, the rate was less than half that. The young make up a significant portion of those affected: In 2010, New York lost 858 people per 100,000 between 18 and 44 to opioid-related overdoses; by 2015, the number had risen to 1,291. In the past five years or so, I have begun to see more burst-suppression patterns and flat waves not just in the elderly but in 24-year-olds. In 19-year-olds. In 15-year-olds. I'm seeing brain death in people who haven't lived their lives yet, whose brains haven't even fully developed, brains that are literally killing themselves for drugs.
Neurologically speaking, opioids are crafty. They turn the brain's own electricity against it, rewiring connections in an endless feedback loop for more drugs. They trick the brain into a death trap, as users chase the chemical bliss from the drugs with more drugs. Acute opioid usage (that is, the high itself) translates into slowing on the EEG.Usually, such an effect is transient, carefully monitored by an anesthesiologist during surgery, for instance. But when the patient becomes the anesthesiologist, the cycle can become lethal.
Opioids suppress pain, but they can also suppress breathing. If an overdose is caught in time, Narcan can reverse the effects, taking the toxin out of the system and awakening the patient. Otherwise, the opioids overwhelm the brain's respiratory center, causing cardiac arrest. Reviving a patient may restart the heart, but if the brain has been starved of oxygen, the brain machine no longer works. This is the opioid epidemic as seen through the screen of an EEG.
How can we ever stop this, when life is painful and these drugs literally kill pain?
I'm a neurologist, not an addiction doctor. I don't pretend to have the training to treat these patients. I am just examining the brain damage after the fact, watching the waves slow down and go flat on the placid yellow of a computer screen. But even from miles away, I realize that those electrodes are attached to a scalp, to a head, to a person someone loved. A person like my colleague's daughter.
Someday, we will have an answer. Someone smarter than I am will come up with a way to short-circuit the brain back to its native and wondrous electrical state, so it won't crave the drugs that will kill it. I await that day, when I won't pull up so many young birthdays in my readings, watching waves that do not dance, witnessing only the flat lines of profound and final electro-cerebral silence.