A nightmarish string of medical errors left a Long Island baby dead, and her grieving parents were falsely accused of abuse, according to a lawsuit. Sara Keenan, 35, had breastfed baby Lana and put her down for a nap on Jan. 3, 2014. About an hour later, the dad, Padraig Keenan, 37, found the 3-month-old in her crib, choking on her own vomit, they claim. Miraculously, a houseguest who works as an EMT quickly revived the baby, who began to breathe again. The parents then called 911, unknowingly igniting a chain reaction of medical missteps that doomed their tiny daughter, according to their suit. Emergency medical technicians from Exchange Ambulances of the Islips failed to intubate the infant, give oxygen, or even protect her from frigid temperatures as they carried her to an ambulance parked four doors away, according to court papers filed last week. Instead of taking the child to pediatric intensive care units at nearby Good Samaritan or Stony Brook hospitals, th...