Patients could be diagnosed and treated faster, as more tests now need to be performed within an eight-week waiting period.
Cardiovascular disease is the biggest cause of death in Wales 9,000 deaths a year
Currently, only those who wait for stress tests and an echocardiogram need to be seen within eight weeks.
But a review found that patients requiring other tests such as blood pressure monitoring need to be seen and treated earlier
According to the Welsh Government report on progress in the treatment of heart disease, around 375,000 people in Wales live with this disease in Wales ̵
As of April 1, eight more tests will be conducted for suspected patients. Heart disease is added to the goal of waiting.
Heart disease is caused when the coronary arteries become tight due to a gradual accumulation of fatty substances.
This may mean that not enough oxygen-rich blood comes through and can lead to a heart attack.
- Almost 200,000 women in Wales live with heart disease
- Prematurity deaths from coronary heart disease reduced by 70%  The new tests were reported as "shadow reports" between April 2017 and December 2017, and during that time were more than eight Weeks reduced from 33% to 17%.
Health Minister Vaughan Gething said the move meant "possibly very sick patients" will be diagnosed and treated earlier.
Dr. Jonathan Goodfellow, President of the Welsh Cardiovascular Society, said: "People with heart disease symptoms need access to fast and effective diagnosis and treatment."
"Providing appropriate imaging and diagnostics in local settings allows patients to conduct a minimum of investigation, which is necessary to get an accurate diagnosis. "