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Electric conductors in heart ventricles
The bundle branches, or Tawara branches, transmit cardiac action potentials (electrical signals) from the bundle of His to Purkinje fibers in heart ventricles
Bundle_branches
Restriction of electrical impulse flow in the heart's bundle branches
A bundle branch block is a partial or complete interruption in the flow of electrical impulses in either of the bundle branches of the heart's electrical
Bundle_branch_block
Collection of heart muscle cells
ventricles) to the point of the apex of the fascicular branches via the bundle branches. The fascicular branches then lead to the Purkinje fibers, which provide
Bundle_of_His
Heart block in the right ventricle
right bundle branch block (RBBB) is a heart block in the right bundle branch of the electrical conduction system. During a right bundle branch block,
Right_bundle_branch_block
Medical condition
Left bundle branch block (LBBB) is a conduction abnormality in the heart that can be seen on an electrocardiogram (ECG). In this condition, activation
Left_bundle_branch_block
Aspect of heart function
right atrium to the atrioventricular node, along the bundle of His, and through the bundle branches to Purkinje fibers in the walls of the ventricles. The
Cardiac_conduction_system
Disorder of heart rhythm
the SA nodes, then to the bundle of His and then via the bundle branches to the point of the apex of the fascicular branches. Blockages are therefore classified
Heart_block
Muscle band in the right ventricle of the heart
as the heart twists during development, develops into the His bundle, bundle branches, atrioventricular rings, and the moderator band. It is possible
Moderator_band
Study of heart functions
right bundle branches. The left bundle branch has two fascicles. The left bundle branch supplies the left ventricle, and the right bundle branch the right
Cardiac_physiology
Network of cells that facilitate rhythmic heart contraction
ventricles known as the atrioventricular junction. The Bundle of His transmits signals to the bundle branches, which send them on to the Purkinje fibers. These
Natural_pacemaker
Arteries transporting blood to heart muscle
body. The coronary arteries wrap around the entire heart. The two main branches are the left coronary artery and right coronary artery. The arteries can
Coronary_arteries
Anatomical cardiac structure
heart's conduction system, Bachmann's bundle (also called the Bachmann bundle or the interatrial band) is a branch of the anterior internodal tract that
Bachmann's_bundle
Medical condition
tachycardia-dependent bundle branch block is a defect in the conduction system of the heart, and is distinct from typical bundle branch blocks due to its
Tachycardia-dependent bundle branch block
Tachycardia-dependent_bundle_branch_block
Heart rate below the normal range
right branch, each destined for a different ventricle. Finally, these bundle branches terminate in the small Purkinje fibers that innervate myocardial tissue
Bradycardia
Examination of the heart's electrical activity
the bundle of His and bundle branches. After the Bundle of His, the conduction system splits into the left bundle branch and the right bundle branch. Both
Electrocardiography
Medical condition
impulses along the Bundle of His or one of the bundle branches. As the Bundle of His divides into the right and left bundle branches, a block of the electrical
Lev's_disease
Abnormal heart rhythm due to faulty electrical connections in the heart
at the AV node, the stimulus travels through the bundle of His to the left and right bundle branches and then to the Purkinje fibers and the endocardium
Wolff–Parkinson–White syndrome
Wolff–Parkinson–White_syndrome
Circulation of blood in the blood vessels of the heart muscle (myocardium)
trunk. Along the way it gives rise to numerous smaller branches that interconnect with the branches of the posterior interventricular artery, forming anastomoses
Coronary_circulation
Fibers in the wall of the heart
Purkinje fibers carry the contraction impulse from both the left and right bundle branch to the myocardium of the ventricles. This causes the muscle tissue of
Purkinje_fibers
Double-walled sac containing the heart and roots of the great vessels
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Pericardium
Organ found in humans and other animals
atrioventricular node only. The signal then travels along the bundle of His to left and right bundle branches through to the ventricles of the heart. In the ventricles
Heart
Valve in the human heart between the left ventricle and the aorta
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Aortic_valve
Inelastic cords of fibrous connective tissue connecting papillary muscles to heart valves
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Chordae_tendineae
Enlargement of the heart muscle
cause electrical conduction problems. Specifically affected are the bundle branches that conduct impulses through the interventricular septum and into
Hypertrophic_cardiomyopathy
Medical condition
the bundle branches that carry electrical signals from the atrioventricular node to the ventricles. The three fascicles are one in the right bundle branch
Trifascicular_block
Medical condition
conduction, the impulse would travel across the bundle of His (AV bundle), down the bundle branches, and into the Purkinje fibers. This would depolarize
Sinoatrial_block
Valve in the heart connecting the left atrium and left ventricle
tissue that thickens the spongiosa layer of the cusp and separates collagen bundles in the fibrosa. This weakens the cusps and adjacent tissue, resulting in
Mitral_valve
Heart ventricle muscles
the University of Michigan Health System} — "Right atrioventricular bundle branch, anterior view" Definition of Papillary muscle MedicineNet Search Results
Papillary_muscle
Dense structure of connective tissue within the heart
autonomic/electrical influence until bordering the bundle of His which further governs autonomic flow to the bundle branches of the ventricles. Understood as such
Cardiac_skeleton
Bundle of skeletal muscle fibers
splits into three bundle branches: the right fascicular branch, left anterior fascicular branch, and left posterior fascicular branch. Myositis may cause
Muscle_fascicle
Group of cells in the wall of the heart
system (SA node labeled 1) Schematic representation of the atrioventricular bundle Cardiac pacemaker Cardiology Heart block Sinus bradycardia Sinus tachycardia
Sinoatrial_node
Muscular columns found in the heart
trabecular fibres forms the moderator band which carries the right branch of the bundle of His. The trabeculae carneae also serve a function similar to that
Trabeculae_carneae
Medical condition
bundle branch block (LBBB). It occurs as a result of a conduction block in the left anterior fascicle, one of the offshoots of the left bundle branch
Left anterior fascicular block
Left_anterior_fascicular_block
Serous fluid within the pericardial cavity of the heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Pericardial_fluid
Wall of tissue separating atria of human heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Interatrial_septum
Electrical conducting structure in the heart
(October 1972). "Arterial blood supply of the atrioventricular node and main bundle". British Heart Journal. 34 (10): 1045–1051. doi:10.1136/hrt.34.10.1045
Atrioventricular_node
Feature of chordate cardiac anatomy
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Infundibulum_(heart)
One-way valve present between right auricle and right ventricle
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Tricuspid_valve
Condition involving an enlarged, ineffective heart
sometimes intraventricular conduction defects and low voltage. When left bundle-branch block (LBBB) is accompanied by right axis deviation (RAD), the rare
Dilated_cardiomyopathy
Heart condition
an age-related physiologic change. Conduction defects such as left bundle branch block or left anterior fascicular block can cause LAD on the ECG. Pre-excitation
Left_axis_deviation
when a bundle branch temporarily blocks due to being refractory, and conduction from the other bundle branch conceals into the blocked branch retrograde
Concealed_conduction
Part of the human heart
supplied mainly by the left circumflex coronary artery, and its small branches. The oblique vein of the left atrium is partly responsible for venous drainage;
Atrium_(heart)
Muscular ridge within the heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Crista_supraventricularis
Ligaments of the sternum and pericardium
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Sternopericardial_ligaments
Muscular tissue of heart in vertebrates
relatively slow rate between the cells. Specialized conductive cells in the bundle of His, and the Purkinje fibers are larger in diameter and conduct signals
Cardiac_muscle
Heart rate exceeding normal resting rate
complex rhythm. However, it may show wide QRS complexes on the ECG if a bundle branch block is present. At high rates, the QRS complex may also become wide
Tachycardia
Chamber of the heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Ventricle_(heart)
Wall of tissue separating ventricles of human heart
interventricular artery, which is a septal branch of the left anterior descending artery, which is a branch of left coronary artery. The muscular part
Interventricular_septum
Semilunar valve of the heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Pulmonary_valve
Innermost layer of tissue lining the chambers of the heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Endocardium
Space of the pericardium
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Pericardial_sinus
Groove separating the heart's ventricles
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Posterior interventricular sulcus
Posterior_interventricular_sulcus
Medical condition
years old, in the absence of a right bundle branch block (RBBB) Ventricular tachycardia with a left bundle branch block (LBBB) morphology, with superior
Arrhythmogenic_cardiomyopathy
Abnormally fast rhythm of the heart's ventricles
supraventricular tachycardias with aberrant conduction from a pre-existing bundle branch block are commonly misdiagnosed as ventricular tachycardia. Other rarer
Ventricular_tachycardia
Changes in electrocardiogram waveforms
waves. It is commonly associated with conduction abnormalities, such as bundle branch blocks, early repolarization. It is also associated with cardiac resynchronization
Notching in electrocardiography
Notching_in_electrocardiography
Medical diagnostic method
myocardial infarction or a "heart attack") in the presence of a left bundle branch block (LBBB) or a ventricular paced rhythm. Myocardial infarction (MI)
Sgarbossa's_criteria
Muscular ridges found in the heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Pectinate_muscles
Anatomical structure
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Valve_of_inferior_vena_cava
Anatomical feature of the human heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Right atrioventricular orifice
Right_atrioventricular_orifice
Conduction abnormality in the heart
Bifascicular block is characterized by right bundle branch block with left anterior fascicular block, or right bundle branch block with left posterior fascicular
Bifascicular_block
Medical condition
each heartbeat. This is unusual because the SA node, AV node, bundle of His, bundle branches, and Purkinje fibers are the structures that have pacemaking
Wandering_atrial_pacemaker
Congenital heart defect
amplitude QRS complexes in the right precordial leads atypical right bundle branch block T wave inversion in V1-V4 and Q waves in V1-V4 and II, III and
Ebstein's_anomaly
Anatomical feature of the human heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Aortic_orifice
Anatomical feature of the heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Crista_terminalis
Anatomic dilation in the left heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Aortic_sinus
Medical condition
sinus syndrome Heart block: Sinoatrial AV 1° 2° 3° Intraventricular Bundle branch block Right Left Left anterior fascicle Left posterior fascicle Bifascicular
Uremic_pericarditis
Blood clot within the heart's blood vessels
sinus syndrome Heart block: Sinoatrial AV 1° 2° 3° Intraventricular Bundle branch block Right Left Left anterior fascicle Left posterior fascicle Bifascicular
Coronary_thrombosis
Medical condition
by a long R-R interval. This short QRS complex typically has a right bundle branch block morphology and represents an aberrantly conducted complex that
Ashman_phenomenon
Feature of the right atrium in the human heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Fossa_ovalis_(heart)
Digital storefront company selling video games and e-books
Humble Bundle, Inc. is a digital storefront for video games, which grew out of its original offering of Humble Bundles, collections of games sold at a
Humble_Bundle
Area of the heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Terminal_sulcus_(heart)
Interruption of cardiac blood supply
on an electrocardiogram (ECG), such as ST segment changes, new left bundle branch block, or pathologic Q waves Changes in the motion of the heart wall
Myocardial_infarction
breast augmentation BBB blood–brain barrier BBB L left bundle branch block BBB R right bundle branch block BBPS Boston Bowel Preparation Scale BBT basal
List of medical abbreviations: B
List_of_medical_abbreviations:_B
Medical condition
follow-up and monitoring of the ECG, especially if there is a comorbid bundle branch block. If there is a need for treatment of an unrelated condition, care
First-degree atrioventricular block
First-degree_atrioventricular_block
Wall of the heart chambers
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Atrioventricular_septum
Failure of the heart to provide sufficient blood flow throughout the body
especially problematic in people with left bundle branch block (blockage of one of the two primary conducting fiber bundles that originate at the base of the heart
Heart_failure
Medical condition
posterior fascicle of the left bundle branch. They produce QRS complexes of relatively short durations with a right bundle branch block pattern. Tachycardias
Right_axis_deviation
Organ system for circulating blood in animals
sacral arteries. Branches to the sides of the aorta will form the definitive renal, suprarenal and gonadal arteries. Finally, branches at the front of
Circulatory_system
Flap of tissue that prevent backflow of blood around the heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Heart_valve
Medical diagnosis
seen in conditions that delay RV emptying (pulmonic stenosis, right bundle branch block). Delay in RV emptying causes delayed pulmonic sound (regardless
Split_S2
Heart disorder in which the cardiac ventricles activate too early
to the ventricle by this tract faster than via normal atrioventricular/bundle of His system, and the ventricles are depolarized (excited) before (pre-)
Pre-excitation_syndrome
Variant of asystole
sinus syndrome Heart block: Sinoatrial AV 1° 2° 3° Intraventricular Bundle branch block Right Left Left anterior fascicle Left posterior fascicle Bifascicular
Agonal_heart_rhythm
Groove separating the heart's ventricles
at the notch of cardiac apex. It contains the anterior interventricular branch of the left coronary artery, and great cardiac vein. Morton, David A. (2019)
Anterior interventricular sulcus
Anterior_interventricular_sulcus
Medical condition
nodes, the electrical signal travels through Bundle of His and divides into the right bundle and left bundle, which are located within the interventricular
Atrioventricular_block
Medical condition
conduction via the His-Purkinje system, resulting in right or left bundle branch block (RBBB or LBBB), syncope, and occasionally sudden cardiac death
Progressive cardiac conduction defect
Progressive_cardiac_conduction_defect
Electrocardiogram waveform representing ventricular contraction in the heart
causes "widened" QRS complexes, sometimes called cardiac aberrancy. In bundle branch block, there can be an abnormal second upward deflection within the
QRS_complex
Fold in the interior lining of the right atrium of the heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Valve_of_coronary_sinus
Groove on the surface of the heart that separates the atria from the ventricles
sulcus contains the coronary sinus. The right coronary artery, circumflex branch of left coronary artery, and small cardiac vein all travel along parts of
Coronary_sulcus
Group of medical conditions characterized by irregular heartbeat
pumping chambers). The impulse then spreads through both ventricles via the bundle of His and the Purkinje fibers causing a synchronized contraction of the
Arrhythmia
Abnormal growths in the heart associated with endocarditis
sinus syndrome Heart block: Sinoatrial AV 1° 2° 3° Intraventricular Bundle branch block Right Left Left anterior fascicle Left posterior fascicle Bifascicular
Vegetation_(pathology)
Medical condition
sinus syndrome Heart block: Sinoatrial AV 1° 2° 3° Intraventricular Bundle branch block Right Left Left anterior fascicle Left posterior fascicle Bifascicular
Carditis
Rapid quivering of the ventricles of the heart
syndrome, changes may be found in the resting ECG with evidence of right bundle branch block (RBBB) and ST elevation in the chest leads V1–V3, with an underlying
Ventricular_fibrillation
Hematoma usually associated with traumatic brain injury
sinus syndrome Heart block: Sinoatrial AV 1° 2° 3° Intraventricular Bundle branch block Right Left Left anterior fascicle Left posterior fascicle Bifascicular
Subdural_hematoma
Medical condition
sinus syndrome Heart block: Sinoatrial AV 1° 2° 3° Intraventricular Bundle branch block Right Left Left anterior fascicle Left posterior fascicle Bifascicular
De_Winter_syndrome
Autoimmune disease resulting in uncontrollable jerking motions
sinus syndrome Heart block: Sinoatrial AV 1° 2° 3° Intraventricular Bundle branch block Right Left Left anterior fascicle Left posterior fascicle Bifascicular
Sydenham's_chorea
clinical laboratory) LABA long-acting beta agonist LABBB left anterior bundle branch block Lac laceration lactate LAD left anterior descending (a coronary
List of medical abbreviations: L
List_of_medical_abbreviations:_L
Part of the heart
Conduction system cardiac pacemaker SA node Bachmann's bundle AV node bundle of His bundle branches Purkinje fibers Pericardial cavity Pericardial sinus
Right_border_of_heart
Controlled vocabulary for use in cytology and histology
Histologica: International Terms for Human Cytology and Histology, Book/CD-ROM Bundle. Hagerstown, MD: Lippincott Williams & Wilkins. 2008. ISBN 978-0-7817-7537-3
Terminologia_Histologica
Dysfunction of the heart muscles due to insufficient blood flow
changes indicating acute heart damage include: ST elevation, new left bundle branch block and ST depression amongst others. The absence of ECG changes does
Acute_coronary_syndrome
Depression of the ST segment on an electrocardiogram
hypertrophy Intraventricular conduction abnormalities (e.g., right or left bundle branch block, WPW, etc.) Hypothermia Tachycardia Reciprocal ST elevation Mitral
ST_depression
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