A professional who performs diagnostic tests of cardiovascular and pulmonary systems of patients to aid physician in diagnosis and treatment of heart, lung, and blood vessel disorders. Responsibilities include:

• Prepares patient for test and explains procedures to obtain cooperation and reassure patient.
• Conducts electrocardiogram, phonocardiogram, echocardiogram, stress testing, and other tests to aid in diagnosis of cardiovascular system, using variety of specialized electronic test equipment, recording devices, and laboratory instruments.
• Conducts tests of pulmonary system to aid physician in diagnosis of pulmonary disorders, using spirometer and other respiratory testing equipment.
• Operates multichannel physiologic monitor, as part of cardiac catheterization team, to measure and record functions of cardiovascular and pulmonary systems of patient during cardiac catheterization.
• Alerts physician to instrument readings outside normal ranges during cardiac catheterization procedures.
• Provides test results to physician.