CHAPTER 1 Cardiovascular System^75
Digital Subtraction Angiography
WHY IS IT GIVEN?
Digital Subtraction Angiography (DSA) enables the physician to view arterial blood
supply to the heart using an injection of radiopaque contrast material.
HOW DOES THE TEST WORK?
The patient is injected with an intravascular contrast material containing iodine.
Images of bone and soft tissue are viewed from fluoroscopy through the use of a
computer, enabling the physician to view the cardiovascular system.
WHAT TO DO?
Before the test:- Obtain written consent from the patient once risks and benefits have been
explained. - Explain the test to the patient, emphasizing that he or she must lie still dur-
ing the test.
After the test:- Determine if there is bleeding at the injection site.
- The patient must drink 1 liter (1 quart) of fluid to aid the kidneys in excret-
ing the dye. - Monitor the patient’s vital signs to assess for changes.
Hemodynamic Monitoring
WHY IS IT GIVEN?
Hemodynamic monitoring measures cardiac output and intracardiac pressure.