A specialist in cardiac electrophysiology is known as a cardiac electrophysiologist, or (more commonly) simply an electrophysiologist. Cardiac electrophysiology is considered a subspecialty of cardiology in most countries and usually requires two or more years of fellowship training beyond a general cardiology fellowship.
PHOTOS: William and Kate's childhood pictures. But as with her first pregnancy, Duchess Kate is suffering from hyperemesis gravidarum, a very acute morning sickness, which required an in-patient stay at King Edward VII's Hospital during her pregnancy with Prince George. So far with this pregnancy, however, the Duchess is being treated at home.
Kate looked remarkably fresh as she posed for cameras just 12 hours after being admitted to St Mary's Hospital and 10 hours after giving birth. Prince William was present for his daughter's birth as he was when the couple's first child, Prince George, was born in July 2013. Kate, a mother for the second time in two years, looks lovingly at her new bundle of joy while Prince William puts a protective arm around her.