Her right foot scuffed the asphalt instead of pushing off. Her stride faltered into a violent, uncoordinated stutter-step. There was no cry of pain, no clutching at a cramped calf or a twisted ankle. Her knees simply buckled beneath her as if her bones had turned to water.
Even more alarming to Adrian’s trained eye was the manner of her fall: as she pitched forward toward the hard blacktop, her arms did not extend in front of her. The human parachute reflex—the hardwired evolutionary instinct to throw out one’s hands to protect the skull and face during a fall—was completely absent. That meant she was already unconscious before her knees hit the ground.
She struck the pavement hard, her left shoulder and the side of her face absorbing the brunt of the impact with a sickening, dull thud that made a nearby pigeon bolt into the canopy. She slid a few inches on the rough macadam and lay completely still, face down, her bright blue form sprawled diagonally across the right lane of the running trail.
Adrian’s brain shifted gears in less than half a second. The jazz music, the warmth of the spring morning, the fatigue in his calves—all of it evaporated, replaced by the ice-cold, hyper-focused clarity of the trauma bay.
He yanked both earbuds out of his ears, letting them drop into his shorts pocket, and sprinted the remaining twenty feet. He dropped to his knees beside her left side on the hard asphalt, ignoring the immediate scrape of gravel against his bare kneecaps.
"Ma'am!" Adrian called out, his voice loud, resonant, and authoritative—the clinical command voice designed to penetrate an altered state of consciousness.
No movement. A small scrape on her left cheekbone was beginning to bead with bright red capillary blood, and her eyes were half-closed, unfocused and glassy.
Supporting her cervical spine with one hand on the back of her neck and the other bracing her shoulder, Adrian executed a smooth, practiced log-roll, turning her onto her back in one fluid motion so she was flat on the firm surface of the trail. He tapped her collarbone firmly with two fingers.
"Ma'am, can you hear me? Open your eyes if you can hear me!"
Nothing. Her head lolled limply to the side. Her skin, which had been flushed pink from exertion moments ago, was already draining of color, taking on an ominous, waxy pallor around the lips—the unmistakable onset of central cyanosis.
Adrian placed his index and middle fingers firmly into the groove of her neck, just lateral to the trachea, searching for the carotid pulse while simultaneously leaning his head down, placing his ear inches from her mouth and nose while his eyes sighted down the plane of her torso to watch her chest.
One. Two. Three. Four. Five. Six.
No rise and fall of the ribcage. No warm breath against his cheek. Once—just once—her jaw gave a brief, spasmodic twitch, an involuntary gasp known clinically as agonal breathing, a brainstem reflex that laypeople often mistook for real respiration, but which Adrian knew was the dying firing of oxygen-starved neurons.
Beneath his fingers, her carotid artery was completely silent. No thump. No flutter. Not even a thready fibrillation.
Sudden cardiac arrest. Out-of-hospital. Unwitnessed until the moment of syncope, likely ventricular fibrillation or pulseless ventricular tachycardia triggered by an underlying arrhythmia or an acute coronary occlusion.
The clock inside Adrian’s head started ticking with deafening volume. At zero to four minutes without cerebral perfusion, brain damage is unlikely if circulation is restored. At four to six minutes, brain damage becomes possible. At six to ten minutes, permanent neurological devastation is probable. Past ten minutes without CPR, survival drops toward zero.
He didn't have a crash cart. He didn't have epinephrine, amiodarone, an endotracheal tube, or a cardiac monitor. What he had were his two hands and the hard asphalt beneath her back.
Adrian shifted his knees closer to her torso, squaring his shoulders directly above her sternum to maximize mechanical leverage. He placed the heel of his right hand squarely on the lower half of her breastbone, right in the center of her chest, and interlocked the fingers of his left hand on top, pulling his fingers up slightly so only the heel of his palm made contact. Locking his elbows straight, he used the weight of his upper body to drive straight down.
Crack.
A faint, sharp pop of costal cartilage separating from the sternum registered against his palm—a sound that horrified amateurs, but which told an ER doctor he was achieving the necessary two-to-two-point-four inches of compression depth required to squeeze the heart.
"One, two, three, four, five, six, seven..." Adrian counted out loud, his voice steady and projecting clearly so he could maintain a strict cadence of one hundred and ten compressions per minute—the exact tempo to keep coronary perfusion pressure up without preventing the heart chambers from refilling on the recoil.
Allowing full chest recoil between each press, he drove down again and again. By compression fifteen, a small semicircle of joggers and walkers had ground to a halt ten feet away, their hands flying to their mouths in shock at the sight of the motionless woman on the pavement.
Without breaking his rhythm or bending his elbows, Adrian snapped his head up and locked eyes with a tall man in a neon yellow windbreaker who was staring in frozen disbelief. In emergency medicine, you never yell "Somebody call 911" into a crowd—diffusion of responsibility ensures that everyone assumes someone else is doing it. You point, you assign, and you command.
"You! In the yellow jacket!" Adrian barked over his counting. "...twenty-one, twenty-two—pull out your phone and call 911 right now! Tell the dispatcher we have an unresponsive adult female in full cardiac arrest on the Riverside Park main loop, two-mile marker near the east maple grove! Tell them CPR is in progress and we need an ALS ambulance and an AED immediately!"
The man in the yellow jacket blinked, jolted out of his stupor by the sheer authority in Adrian’s voice, and fumbled his iPhone out of his armband. "Got it! Calling now!"
"...twenty-eight, twenty-nine, thirty!"
Adrian paused compressions for less than two seconds. Using the head-tilt, chin-lift maneuver to open her airway and clear the tongue from the back of her pharynx, he pinched her nostrils shut with his thumb and forefinger, created a tight seal over her mouth, and delivered two controlled rescue breaths, watching out of the corner of his eye to confirm a visible rise of her chest wall after each one. One second per breath. No hyperventilation.