Pericardiocentesis is a procedure that uses a needle to remove fluid from the pericardial sac, the tissue that surrounds the heart.
Pericardial tap; Percutaneous pericardiocentesis
How the test is performed
The procedure is usually done in an intensive care unit's procedure room or even at the bedside.
A health care provider will put an IV into your arm in case fluids or medicines need to be given through a vein. For example, medication may be given if you have slowing of the heartbeat or a drop in blood pressure during the procedure.
The health care provider will clean an area just below the breastbone and apply a local numbing medication (anesthetic). The doctor will insert a needle and guide it into the pericardial sac. Echocardiography is used to help position the needle and monitor fluid drainage, although electrocardiographic (ECG) leads may also be used to help with positioning.
Once the needle has reached the correct area, it is removed and replaced with a tube called a catheter. Fluid drains through this catheter into containers. Usually, the pericardial catheter is left in place so draining may continue for several hours.
Surgical pericardiocentesis may be necessary in difficult cases. In this procedure, the fluid is drained through a more invasive procedure that may require anesthesia.
How to prepare for the test
You may not be able to eat or drink for 6 hours before the test. You must sign a consent form.
How the test will feel
You may feel pressure as the needle enters. Some people have chest pain, which may require pain medication.
Why the test is performed
This test may be done to remove and examine fluid that is pressing on the heart. It is usually done to evaluate the cause of a chronic or recurrent pericardial effusion.
It may also be done to treat cardiac tamponade.
There is normally a small amount of clear, straw-colored fluid in the pericardial space.
What abnormal results mean
Abnormal findings may indicate the cause of pericardial fluid accumulation, such as:
What the risks are
- Collapsed lung
- Heart attack
- Infection (pericarditis)
- Irregular heartbeats (arrhythmias)
- Puncture of the heart muscle, coronary artery, lung, liver, or stomach
- Pneumopericardium (air in the pericardial sac)
LeWinter MM. Pericardial diseases. In: Libby P, Bonow RO, Mann DL, Zipes DP, eds. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 8th ed. St. Louis, Mo: WB Saunders; 2007:chap 70.
Reviewed By: Issam Mikati, MD, Associate Professor of Medicine, Feinberg School of Medicine, Director, Northwestern Clinic Echocardiography Lab, Northwestern University, Chicago, IL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.