A cardiovascular sonographer uses ultrasound machines to help doctors diagnose a patient with a heart condition. In this career, you use specialized ultrasound equipment that takes a sonographic image of the patient’s heart. The results can help doctors diagnose and treat a variety of heart and blood conditions. As a cardiovascular sonographer, you typically work with patients for a short period of time to perform the ultrasound. Your job duties include preparing patients for the exam, preparing the ultrasound equipment, and then performing the ultrasound scan on the patient.