BANGKOK, Dec 19 (Reuters) - The eldest child of Thai King Maha Vajiralongkorn is in a stable condition "at a certain level", with doctors using medication and equipment to support her lung, heart and kidney functions after she suffered a heart problem, the palace said on Monday.
The princess was taken ill and lost consciousness on Wednesday while preparing her dogs for a competition in northeastern Nakhon Ratchasima province, the palace said.
Princess Bajrakitiyabha is one of three children of King Vajiralongkorn who have formal titles, making her eligible for the throne under a palace succession law and the country's constitution.
In its statement, the palace said her "condition is stable at a certain level" and her heartbeat was being controlled by medicine, but her heart contraction was still weak.
The princess was born on Dec. 7, 1978 as the daughter of the king and his first wife, Princess Soamsawali.