bundle of His

(hĭs)

The bundle of cardiac muscle fibers that conducts the electrical impulses that regulate the heartbeat, from the atrioventricular node in the right atrium to the septum between the ventricles and then to the left and right ventricles. Also called atrioventricular bundle.

[After Wilhelm His, Jr. (1863-1934), Swiss physician.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

a′trioventric′ular bun`dle

a bundle of conducting muscle fibers in the heart leading from the atrioventricular node to the ventricles. Also called bundle of His.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

bundle of His - a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract

atrioventricular bundle, atrioventricular trunk, truncus atrioventricularis

cardiac muscle, heart muscle - the muscle tissue of the heart; adapted to continued rhythmic contraction

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References in periodicals archive

Gated myocardial perfusion SPECT asynchrony measurements in patients with left bundle branch block.

VISUAL QUANTIFICATION OF ADENOSINE STRESS INDUCED TC-99M MIBI MYOCARDIAL PERFUSION SPECT IN LEFT BUNDLE BRANCH BLOCK AND IT'S COMPARISON WITH CORONARY ANGIOGRAPHY

We found it was very common that in KSS, conduction defects were aggravating and not constant, as seen in most of our patients who gradually deteriorated from bundle branch blockages to complete AVBs.

Clinical and Brain Magnetic Resonance Imaging Features in a Cohort of Chinese Patients with Kearns-Sayre Syndrome

* Limited effect on the bundle branches: bundle branch block or intraventricular conduction delay are rare features of toxicity.

Digoxin therapy in the modern management of cardiovascular disease: an unusual but serious complication

Patients with a preoperative history of AF, moderate or significant organic valvular heart disease, left or right incomplete or complete bundle branch block, antiarrhythmic use, duration of QRS [greater than or equal to] 120 msn and patients with permanent pacemakers were excluded from the study.

Fragmented QRS may predict postoperative atrial fibrillation in patients undergoing isolated coronary artery bypass graft surgery/Fragmente QRS izole koroner arter baypass greftleme operasyonu geciren hastalarda postoperatif atriyal fibrilasyon gelisimini ongorebilir

Left bundle branch block (LBBB), on the other hand, is more frequently associated with heart disease due to hypertension or coronary artery blockages.

Ask the doctors

ST-segment ([greater than or equal to] 1 mm) and T-wave changes such as inversions secondary to strain or old injury or conduction abnormalities such as bundle branch blocks and prolonged QT interval may obscure exercise treadmill testing findings.

Stress tests: how to make a calculated choice: spare your patients unnecessary stress testing by determining their pretest probability for CAD

But since a significant percentage of these patients also have bundle branch block, now we also have an electrical therapy.

Preserving the rhythm of life: leading heart experts call for broader use of implantable defibrillator technology that is improving and saving the lives of heart attack survivors

The ECG before the study showed severe intracardiac conduction with right bundle branch block that was not present at admission.

Complex management of electrical storm in a patient with non-ischemic dilated cardiomyopathy

Procedural success was based on three criteria: 1) class improvement in NYHA class, 2) [greater than or equal to] 5 % improvement in ejection fraction (EF) and 3) conversion of Left bundle branch block (LBBB) into normal QRS complexes.

PROCEDURAL SUCCESS RATE OF CARDIAC RESYNCHRONIZATION THERAPY AND DEFIBRILLATOR IMPLANTATION IN HEART FAILURE PATIENTS

His cardiac enzymes were not elevated and electrocardiogram (EKG) showed normal sinus rhythm at a rate of 62 bpm with borderline AV conduction delay and right bundle branch block (RBBB) pattern (Figure 1).

Ticagrelor Associated Heart Block: The Need for Close and Continued Monitoring

The mortality rate associated with uncomplicated infarctions is less than 20%, but the mortality rate when some form of bundle branch block is present may be as high as 60%.

Study of prognosis of atrioventricular blocks versus intraventricular blocks in acute myocardial infarction

DIAGNOSIS: Multifocal atrial tachycardia; right bundle branch block.

Irregularly irregular cardiac rhythm in an 87-year-old woman