There were 2740 positions for cardiac technologists in Texas in 2006, and there are expected to be 3920 positions in 2016. The average cardiac sonographer salary in Texas is $51,380, according to the BLS.This figure is just a bit higher than the national average of $49,730. An expected 120 new job openings for cardiac sonographers each year in Texas is expected due to the projected growth.ccording to the Bureau of Labor Statistics, a 24% increase is expected in this type of diagnostic medical position between the years 2006 and 2016. However, according to the Texas Workforce Commission, job growth in the cardiac sonography field is expected to be an astounding 43% during the same time period.