Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community


    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Heart Disease Health Center

Font Size

Pericardial Drainage

Pericardial drainage (pericardiocentesis) is done to find the cause of fluid buildup around the heart and to relieve pressure on the heart. The tissue sac that surrounds the heart is called the pericardium. It protects the heart and parts of the major blood vessels connected to the heart. Normally, there is a small amount of fluid between this sac and the heart. This fluid surrounds and helps cushion the heart. It helps reduce friction between the heart and other structures in the chest when the heart beats.

Some diseases cause fluid to collect within the pericardium. This fluid collection is called pericardial effusion. Excess fluid camera.gif can prevent normal filling of the heart, which can reduce the heart's ability to pump blood (cardiac tamponade).

Pericardial drainage may be done to find the cause of a pericardial effusion. During this test, a needle is inserted into the chest and into the pericardium to remove a sample of the fluid. The fluid is sent to a laboratory where it is measured and checked for blood, microorganisms (such as bacteria, fungi, or viruses), white blood cells, sugar (glucose), and cancer cells. In some cases, the pericardial fluid may be checked for other substances (such as carcinoembryonic antigen, or CEA).

Pericardial drainage may also be done to help relieve pressure on the heart. It is sometimes done in an emergency if a serious injury has occurred, such as a gunshot or stab wound to the chest or a massive heart attack. In these circumstances, blood or fluid can build up very rapidly in the pericardium. An emergency pericardial drainage can be done to remove the blood or excess pericardial fluid surrounding the heart.

Why It Is Done

Pericardial drainage is done to:

  • Relieve pressure on the heart.
  • Find the cause of pericardial effusion.
  • Remove blood or excess fluid after a heart attack or a serious injury, such as a gunshot or stab wound.

How To Prepare

Tell your doctor if you:

1 | 2 | 3 | 4 | 5

WebMD Medical Reference from Healthwise

Last Updated: March 12, 2014
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

Today on WebMD

x-ray of human heart
A visual guide.
atrial fibrillation
Symptoms and causes.
heart rate graph
10 things to never do.
heart rate
Get the facts.
empty football helmet
red wine
eating blueberries
Simple Steps to Lower Cholesterol
Inside A Heart Attack
Omega 3 Sources
Salt Shockers
lowering blood pressure