BACK TOTOP Browse A-ZSearchBrowse A-ZABCDEFGHIJKLMNOPQRSTUVWXYZ0-9 E-mail FormEmail ResultsName:Email address:Recipients Name:Recipients address:Message: Print-FriendlyBookmarksbookmarks-menuHis bundle electrographyHis bundle electrogram; HBE; His bundle recording; Electrogram - His bundle; Arrhythmia - His; Heart block - HisHis bundle electrography is a test that measures electrical activity in a part of the heart that carries the signals that control the time between heartbeats (contractions). How the Test is Performed The bundle of His is a group of fibers that carry electrical impulses through the center of the heart. If these signals are blocked, you will have problems with your heartbeat.No audio descriptionWith audio descriptionRelated video goes here for no-HTML5 browsersRelated video goes here for no-HTML5 browsersThe His bundle electrography is part of an electrophysiology study (EPS). An intravenous catheter (IV line) is inserted into your arm so that you can be given medicines during the test.ElectrophysiologyIntracardiac electrophysiology study (EPS) is a test to look at how well the heart's electrical signals are working. It is used to evaluate abnormal...ImageRead Article Now Book Mark Article IntravenousIntravenous means "within a vein. " Most often it refers to giving medicines or fluids through a needle or tube inserted into a vein. This allows th...Read Article Now Book Mark Article Electrocardiogram (ECG) leads are placed on your arms and legs. Your arm, neck, or groin will be cleaned and numbed with a local anesthetic. After the area is numb, the cardiologist makes a small cut in a vein and inserts a thin tube called a catheter inside.ElectrocardiogramAn electrocardiogram (ECG) is a test that records the electrical activity of the heart.ImageRead Article Now Book Mark Article The catheter is carefully moved through the vein up into the heart. An x-ray method called fluoroscopy helps guide the doctor to the right place. During the test, you are watched for any abnormal heartbeats (arrhythmias). The catheter has a sensor on the end, which is used to measure the electrical activity of the bundle of His.x-rayX-rays are a type of electromagnetic radiation, just like visible light. An x-ray machine sends individual x-ray waves through the body. The images...ImageRead Article Now Book Mark Article ArrhythmiasAn arrhythmia is a disorder of the heart rate (pulse) or heart rhythm. The heart can beat too fast (tachycardia), too slow (bradycardia), or irregul...ImageRead Article Now Book Mark Article How to Prepare for the Test You will be told not to eat or drink anything for 6 to 8 hours before the test. The test will be done in a hospital. Some people may need to check into the hospital the night before the test. Otherwise, you will check in the morning of the test. Although the test may take some time, most people do not need to stay in the hospital overnight.Your health care provider will explain the procedure and its risks. You must sign a consent form before the test starts.About half an hour before the procedure, you will be given a mild sedative to help you relax. You will wear a hospital gown. The procedure may last from 1 to several hours. How the Test will Feel You are awake during the test. You may feel some discomfort when the IV is placed into your arm, and some pressure at the site when the catheter is inserted. Why the Test is Performed This test may be done to:Determine if you need a pacemaker or other treatment Diagnose arrhythmias Find the specific location where electrical signals through the heart are blocked Normal Results The time it takes for the electrical signals to travel through the bundle of His is normal. What Abnormal Results Mean A pacemaker may be needed if the test results are abnormal. Risks Risks of the procedure include:Arrhythmias Cardiac tamponade Cardiac tamponadeCardiac tamponade is pressure on the heart that occurs when blood or fluid builds up in the space between the heart muscle and the outer covering sac...ImageRead Article Now Book Mark Article Embolism from blood clots at the tip of the catheter Embolism from blood clots at the tip of...Blood clots are clumps that occur when blood hardens from a liquid to a solid. A blood clot that forms inside one of your veins or arteries is calle...ImageRead Article Now Book Mark Article Heart attack Hemorrhage Infection Injury to the vein or artery Low blood pressure StrokeStrokeA stroke occurs when blood flow to a part of the brain stops. A stroke is sometimes called a "brain attack. " If blood flow is cut off for longer th...ImageRead Article Now Book Mark Article Open ReferencesReferencesIssa ZF, Miller JM, Zipes DP. Atrioventricular conduction abnormalities. In: Issa ZF, Miller JM, Zipes DP, eds. Clinical Arrhythmology and Electrophysiology. 3rd ed. Philadelphia, PA: Elsevier; 2019:chap 9.Curtis AB, Tomaselli GF. Approach to the patient with cardiac arrhythmias. In: Libby P, Bonow RO, Mann DL, Tomaselli GF, Bhatt DL, Solomon SD, eds. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 12th ed. Philadelphia, PA: Elsevier; 2022:chap 61.AllVideoImagesTogCardiac conduction systemAnimation No audio descriptionWith audio descriptionRelated video goes here for no-HTML5 browsersRelated video goes here for no-HTML5 browsersCardiac conduction system - Animation A network of specialized muscle cells is found in the heart's walls. These muscle cells send signals to the rest of the heart muscle causing a contraction. This group of muscle cells is called the cardiac conduction system. The main parts of the system are the SA node, AV node, bundle of HIS, bundle branches, and Purkinje fibers. Let's follow a signal through the contraction process. The SA node starts the sequence by causing the atrial muscles to contract. That's why doctors sometimes call it the anatomical pacemaker. Next, the signal travels to the AV node, through the bundle of HIS, down the bundle branches, and through the Purkinje fibers, causing the ventricles to contract. This signal creates an electrical current that can be seen on a graph called an electrocardiogram, or EKG. Doctors use an EKG to see how well the cardiac conduction system works. Any changes on the EKG can mean serious problems.ECG - illustration The electrocardiogram (ECG) is used extensively in the diagnosis of heart disease, from congenital heart disease in infants to myocardial infarction and myocarditis in adults. Several different types of electrocardiogram exist.ECGillustrationCardiac conduction systemAnimation No audio descriptionWith audio descriptionRelated video goes here for no-HTML5 browsersRelated video goes here for no-HTML5 browsersCardiac conduction system - Animation A network of specialized muscle cells is found in the heart's walls. These muscle cells send signals to the rest of the heart muscle causing a contraction. This group of muscle cells is called the cardiac conduction system. The main parts of the system are the SA node, AV node, bundle of HIS, bundle branches, and Purkinje fibers. Let's follow a signal through the contraction process. The SA node starts the sequence by causing the atrial muscles to contract. That's why doctors sometimes call it the anatomical pacemaker. Next, the signal travels to the AV node, through the bundle of HIS, down the bundle branches, and through the Purkinje fibers, causing the ventricles to contract. This signal creates an electrical current that can be seen on a graph called an electrocardiogram, or EKG. Doctors use an EKG to see how well the cardiac conduction system works. Any changes on the EKG can mean serious problems.ECG - illustration The electrocardiogram (ECG) is used extensively in the diagnosis of heart disease, from congenital heart disease in infants to myocardial infarction and myocarditis in adults. Several different types of electrocardiogram exist.ECGillustration Tests for His bundle electrography His bundle electrographyRelated Information Arrhythmias(Condition)Heart attack(Condition)Heart attack and acute coronary syndrome - InDepth(In-Depth) Review Date: 5/8/2022 Reviewed By: Michael A. Chen, MD, PhD, Associate Professor of Medicine, Division of Cardiology, Harborview Medical Center, University of Washington Medical School, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. 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His bundle electrographyHis bundle electrogram; HBE; His bundle recording; Electrogram - His bundle; Arrhythmia - His; Heart block - HisHis bundle electrography is a test that measures electrical activity in a part of the heart that carries the signals that control the time between heartbeats (contractions). How the Test is Performed The bundle of His is a group of fibers that carry electrical impulses through the center of the heart. If these signals are blocked, you will have problems with your heartbeat.No audio descriptionWith audio descriptionRelated video goes here for no-HTML5 browsersRelated video goes here for no-HTML5 browsersThe His bundle electrography is part of an electrophysiology study (EPS). An intravenous catheter (IV line) is inserted into your arm so that you can be given medicines during the test.ElectrophysiologyIntracardiac electrophysiology study (EPS) is a test to look at how well the heart's electrical signals are working. It is used to evaluate abnormal...ImageRead Article Now Book Mark Article IntravenousIntravenous means "within a vein. " Most often it refers to giving medicines or fluids through a needle or tube inserted into a vein. This allows th...Read Article Now Book Mark Article Electrocardiogram (ECG) leads are placed on your arms and legs. Your arm, neck, or groin will be cleaned and numbed with a local anesthetic. After the area is numb, the cardiologist makes a small cut in a vein and inserts a thin tube called a catheter inside.ElectrocardiogramAn electrocardiogram (ECG) is a test that records the electrical activity of the heart.ImageRead Article Now Book Mark Article The catheter is carefully moved through the vein up into the heart. An x-ray method called fluoroscopy helps guide the doctor to the right place. During the test, you are watched for any abnormal heartbeats (arrhythmias). The catheter has a sensor on the end, which is used to measure the electrical activity of the bundle of His.x-rayX-rays are a type of electromagnetic radiation, just like visible light. An x-ray machine sends individual x-ray waves through the body. The images...ImageRead Article Now Book Mark Article ArrhythmiasAn arrhythmia is a disorder of the heart rate (pulse) or heart rhythm. The heart can beat too fast (tachycardia), too slow (bradycardia), or irregul...ImageRead Article Now Book Mark Article How to Prepare for the Test You will be told not to eat or drink anything for 6 to 8 hours before the test. The test will be done in a hospital. Some people may need to check into the hospital the night before the test. Otherwise, you will check in the morning of the test. Although the test may take some time, most people do not need to stay in the hospital overnight.Your health care provider will explain the procedure and its risks. You must sign a consent form before the test starts.About half an hour before the procedure, you will be given a mild sedative to help you relax. You will wear a hospital gown. The procedure may last from 1 to several hours. How the Test will Feel You are awake during the test. You may feel some discomfort when the IV is placed into your arm, and some pressure at the site when the catheter is inserted. Why the Test is Performed This test may be done to:Determine if you need a pacemaker or other treatment Diagnose arrhythmias Find the specific location where electrical signals through the heart are blocked Normal Results The time it takes for the electrical signals to travel through the bundle of His is normal. What Abnormal Results Mean A pacemaker may be needed if the test results are abnormal. Risks Risks of the procedure include:Arrhythmias Cardiac tamponade Cardiac tamponadeCardiac tamponade is pressure on the heart that occurs when blood or fluid builds up in the space between the heart muscle and the outer covering sac...ImageRead Article Now Book Mark Article Embolism from blood clots at the tip of the catheter Embolism from blood clots at the tip of...Blood clots are clumps that occur when blood hardens from a liquid to a solid. A blood clot that forms inside one of your veins or arteries is calle...ImageRead Article Now Book Mark Article Heart attack Hemorrhage Infection Injury to the vein or artery Low blood pressure StrokeStrokeA stroke occurs when blood flow to a part of the brain stops. A stroke is sometimes called a "brain attack. " If blood flow is cut off for longer th...ImageRead Article Now Book Mark Article Open ReferencesReferencesIssa ZF, Miller JM, Zipes DP. Atrioventricular conduction abnormalities. In: Issa ZF, Miller JM, Zipes DP, eds. Clinical Arrhythmology and Electrophysiology. 3rd ed. Philadelphia, PA: Elsevier; 2019:chap 9.Curtis AB, Tomaselli GF. Approach to the patient with cardiac arrhythmias. In: Libby P, Bonow RO, Mann DL, Tomaselli GF, Bhatt DL, Solomon SD, eds. Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine. 12th ed. Philadelphia, PA: Elsevier; 2022:chap 61.