Also known as: V-fib
Henry, the maintenance worker, suffers ventricular fibrillation and cardiac arrest after being electrocuted while trying to repair the generator. He is successfully resuscitated with a pericardial thump by Max.
Also known as: Electrical injury
Henry sustains electrical burns to his hands from electrocution while attempting to repair the generator during the power outage.
Also known as: Knife in the heart
Hugh has a penetrating injury to his right ventricle that requires emergency open-heart surgery. Reynolds performs the surgery without power, manually timing sutures to the heart's rhythm while managing significant blood loss.
Also known as: Postpartum stroke
Kira, a new mother who gave birth the day before, collapses with left-sided weakness after complaining of a headache. Diagnosed with an amniotic stroke, she undergoes an emergency catheter procedure using improvised techniques during the power outage.
Also known as: Head laceration
Burl, a prisoner from Rikers, requires an MRI scan for a head injury sustained when a guard assaulted him. He is stuck in the MRI machine during the power outage and is later released to help repair the generator.
Also known as: Foot cramp
Dr. Kapoor develops a severe foot cramp from prolonged exposure to snow and cold, requiring acupressure treatment from Dr. Hartman while they are trapped in an elevator guiding Agnes through a stroke procedure.
Also known as: Terminal cancer
Max's ongoing cancer treatment is referenced throughout the episode as Helen confronts him about his refusal to choose between his health needs and his work demands. Helen decides to transfer his care to another oncologist.