State health bulletin finds nearly one in four critical heart defects in Alaska infants diagnosed late

Alaska has improved early detection of serious newborn heart defects, but rural gaps remain.

A state health bulletin found that nearly one in four confirmed critical congenital heart defects in Alaska from 2007 to 2018 were not detected until after the first 24 hours of life. Some were missed for months after hospital discharge.

The Department of Health reviewed 414 reported cases and confirmed 221. About 46% were detected before birth, while another 25% were found during newborn clinical exams. Pulse oximetry screening caught a smaller share.

The main concern is geography. Prenatal detection was lower in rural Alaska, where smaller birth volumes and limited access to advanced ultrasound screening can make early diagnosis harder. That matters because early detection gives families and providers more time to plan delivery near specialized cardiac care.

Alaska’s prenatal detection rate improved sharply over the study period, helped by better ultrasound detection and a 2014 pulse oximetry screening requirement. The bulletin recommends continued training for providers and sonographers, especially in rural areas.