When Windy Manzardo first noticed her irregular heart palpitations, she knew what to do. It was November 2021 during her shift as a cardiac nurse at Kootenai Health when something didn’t feel right.

Concord, N.H. — Andy Hoang eagerly began her first nursing job this year in New Hampshire, with a desire to specialize in cardiac care. She was excited about attending a November practice session on ...