Loading...
*  Congenital heart defect
A number of classification systems exist for congenital heart defects. In 2000 the International Congenital Heart Surgery ... in the electrical conduction of the heart and TBX5 is related to the Holt-Oram syndrome which includes electrical conduction ... Congenital heart defects are known by a number of names including congenital heart anomaly, congenital heart disease, heart ... A congenital heart defect (CHD), also known as a congenital heart anomaly or congenital heart disease, is a problem in the ...
*  Dilated cardiomyopathy
Complications can include heart failure, heart valve disease, or an irregular heartbeat. Causes include genetics, alcohol, ... via activation of the sympathetic nervous system and the renin-angiotensin system. These responses initially compensate for ... Artificial pacemakers may be used in patients with intraventricular conduction delay, and implantable cardioverter- ... Pieske B (2004). "Reverse remodeling in heart failure - fact or fiction?". Eur Heart J Suppl. 6: D66-78. doi:10.1016/j.ehjsup. ...
*  PRKAG2
Gollob MH, Green MS, Tang AS, Roberts R (2002). "PRKAG2 cardiac syndrome: familial ventricular preexcitation, conduction system ... 2001). "Molecular cloning, genomic organization, and mapping of PRKAG2, a heart abundant gamma2 subunit of 5'-AMP-activated ... progressive conduction system disease and cardiac hypertrophy. Alternate transcriptional splice variants, encoding different ...
*  Bundle of His
Disorders affecting the cardiomyocytes that make up the electrical conduction system of the heart are called heart blocks. ... The bundle of His is an important part of the electrical conduction system of the heart, as it transmits impulses from the ... As part of the electrical conduction system of the heart, it transmits the electrical impulses from the AV node (located ... The ventricular conduction system comprises the bundle branches and the Purkinje networks. It takes about 0.03-0.04 seconds for ...
*  Karel Frederik Wenckebach
Wenckebach is credited for describing the median bundle of the heart's conductive system that connects the sinoatrial node to ... In 1899 he provided a description of irregular pulses due to partial blockage of atrioventricular conduction, creating a ... "The connecting pathways between the sinus node and A-V node and between the right and the left atrium in the human heart". ... American Heart Journal. 66 (4): 498-508. doi:10.1016/0002-8703(63)90382-X. Mendoza-Davila, Natalia; Varon Joseph (Nov 2008). " ...
*  Heart block
... in the electrical conduction system of the heart. Despite the severe-sounding name, heart block may often cause no symptoms at ... complete heart block) Infra-Hisian block is that of the distal conduction system. Types of infra-Hisian block include: Type 2 ... Following the path of the electrical signals, the places where conduction can be blocked give rise to different kinds of heart ... SA blocks rarely give severe symptoms, because even if an individual had complete block at this level of the conduction system ...
*  Sinoatrial node
... that travels through the heart via the electrical conduction system (see figure 1) causing it to contract. In a healthy heart, ... Heart; conduction system (SA node labeled 1) Schematic representation of the atrioventricular bundle Cardiac pacemaker ... Anatomy figure: 20:06-01 at Human Anatomy Online, SUNY Downstate Medical Center - "The conduction system of the heart." Diagram ... Heart rate depends on the rate at which the sinoatrial node produces action potentials. At rest, heart rate is between 60 and ...
*  Electrical conduction system of the heart
... a pacemaker may be surgically inserted into the conduction system. "Your Heart's Electrical System". National Heart, Lung, and ... The conduction system consists of specialised heart muscle cells, and is situated within the myocardium. There is a skeleton of ... Dysfunction of the conduction system can cause irregular, fast, or slow heart rhythms. Electrical signals arising in the SA ... The electrical conduction system of the heart transmits signals generated usually by the sinoatrial node to cause contraction ...
*  Homeobox protein Nkx-2.5
The gene has been show to play a role in the heart's conduction system, postnatally. NKX2-5 is also involved in the intrinsic ... Mutations in tinman result in loss of heart formation in the embryo, suggesting that tinman is essential for Drosophila heart ... and maintenance of AV conduction. Mutations in expression are associated with congenital heart disease (CHD) and related ... and HAND2 transcription factors to direct heart looping during early heart development. NKX2.5 in vertebrates is equivalent to ...
*  Ectopic beat
... s often remain undetected and occur as part of minor errors in the heart conduction system. They are rarely ... is a disturbance of the cardiac rhythm frequently related to the electrical conduction system of the heart, in which beats ... or from finer branches of the electric transduction system, cause additional beats of the heart. Some medications may worsen ... Some patients describe this experience as a 'flip' or a 'jolt' in the chest, or a 'heart hiccups', while others report dropped ...
*  Das Reizleitungssystem des Säugetierherzens
Electrical conduction system of the heart Silverman, M. E. (13 June 2006). "Why Does the Heart Beat?: The Discovery of the ... He credited Tawara for connecting the bundle with the Purkinje fibers and for declaring it the heart's conduction system. ... Das Reizleitungssystem des Säugetierherzens (English: "The Conduction System of the Mammalian Heart") is a scientific monograph ... "The Conduction System of the Mammalian Heart") was published in 1906. The most important discoveries are listed below: The ...
*  Purkinje fibers
... allow the heart's conduction system to create synchronized contractions of its ventricles, and are, therefore, ... Heart rate is governed by many influences from the autonomic nervous system. The Purkinje fibers do not have any known role in ... Anatomy photo: Circulatory/heart/purkinje/purkinje1 - Comparative Organology at University of California, Davis - "Mammal heart ... This causes the muscle tissue of the ventricles to contract and generate force to eject blood out of the heart, either to the ...
*  Coronary circulation
... and the heart conduction system. Normally, one or more marginal arteries arise from the right coronary artery inferior to the ... The anatomy of the veins of the heart is very variable, but generally it is formed by the following veins: heart veins that go ... The anastomoses in the heart are very small. Therefore, this ability is somewhat restricted in the heart so a coronary artery ... Heart veins that go directly to the right atrium: the anterior cardiac veins, the smallest cardiac veins (Thebesian veins). The ...
*  Bachmann's bundle
In the heart's conduction system, Bachmann's bundle (also called the Bachmann bundle or the interatrial tract) is a branch of ... It is therefore considered to be part of the "atrial conduction system" of the heart. In 1916, Jean George Bachmann conducted ... Atrial automaticity foci are within the atrial conduction system. The concentration of converging conduction tracts near the ... the other three conduction tracts that constitute the atrial conduction system are known as the anterior, middle, and posterior ...
*  Ankylosing spondylitis
... aortic valve insufficiency or disturbances of the heart's electrical conduction system. Lung involvement is characterized by ... Organs commonly affected by AS, other than the axial spine and other joints, are the heart, lungs, eyes, colon, and kidneys. ... pulmonary disease and heart valve disease may lead suspicion away from other juvenile spondyloarthropathies. The Schober's test ...
*  Heart
... traveling through the atrioventricular node and along the conduction system of the heart. The heart receives blood low in ... In a healthy heart blood flows one way through the heart due to heart valves, which prevent backflow. The heart is enclosed in ... Heart illustration with circulatory system From the heart to the body Arteries that contain deoxygenated blood, from the heart ... The pacemaker cells make up 1% of cells and form the conduction system of the heart. They are generally much smaller than the ...
*  Lyme disease
The disease may adversely impact the heart's electrical conduction system and can cause abnormal heart rhythms such as ... Days to weeks following the tick bite, the spirochetes spread via the bloodstream to joints, heart, nervous system, and distant ... peripheral nervous system, and central nervous system. Many of the signs and symptoms of Lyme disease are a consequence of the ... Heart J. 70 (1): 15-16. doi:10.1136/hrt.70.1.15. PMC 1025222 . PMID 8037992. Guy EC, Bateman DE, Martyn CN, Heckels JE, Lawton ...
*  Cardiac physiology
... unimpaired function of the heart: involving blood flow; myocardium structure; the electrical conduction system of the heart; ... as part of the cardiac conduction system. The components of the cardiac conduction system include the atrial and ventricular ... The pacemaker cells make up just (1% of cells) and form the conduction system of the heart. They are generally much smaller ... In a healthy heart, there are only two audible heart sounds, called S1 and S2. The first heart sound S1, is the sound created ...
*  Leber's hereditary optic neuropathy
... to exclude other possible causes of vision loss and important associated syndromes such as heart electrical conduction system ... experiments may in part explain the death of LHON affected retinal ganglion cells in preference to other central nervous system ... non LHON affected retinal ganglion cells produce less of the potent superoxide radical than other normal central nervous system ...
*  Pacemaker crosstalk
Pacemaker failure Electrical conduction system of the heart Yarlagadda, Chakri. "Pacemaker Malfunction". eMedicine. Retrieved ... Crosstalk is more common in unipolar systems due to larger pacing spike. Crosstalk is sometimes referred to as known crosstalk ...
*  Ectopic pacemaker
An ectopic pacemaker can reside within a part of the electrical conduction system of the heart, or within the muscle cells of ... Cardiac ectopy Clinical cardiac electrophysiology Electrical conduction system of the heart. ... In a normal heart beat rhythm, the SA node usually suppresses the ectopic pacemaker activity due to the higher impulse rate of ... Increased local parasympathetic nervous system activity Elevated sympathetic nervous system output Overstimulation from drugs ...
*  Ephaptic coupling
The electrical conduction system of the heart has been robustly established. However, newer research has been challenging some ... Ephaptic coupling is a form of communication within the nervous system and is distinct from direct communication systems like ... "Mechanisms of cardiac conduction: a history of revisions". Am. J. Physiol. Heart Circ. Physiol. 306 (5): H619-27. doi:10.1152/ ... A number of studies have shown how inhibition among neurons in the olfactory system work to fine tune integration of signals in ...
*  Cardiac pacemaker
... if the SA node is damaged or if the electrical conduction system of the heart has problems. Cardiac arrhythmias can cause heart ... The action potential generated by the SA node passes down the electrical conduction system of the heart, and depolarizes the ... Cardiac action potential Electrical conduction system of the heart Neil A. Campbell ... [et al.] (2006). Biology : concepts & ... Further down the electrical conducting system of the heart is the Bundle of His. The left and right branches of this bundle, ...
*  Heart arrhythmia
These cells are found in the conduction system of the heart and include the SA node, AV node, Bundle of His and Purkinje fibers ... Arrhythmias are due to problems with the electrical conduction system of the heart. Arrhythmias may occur in children; however ... than the rest of the heart and, therefore, is usually responsible for setting the heart rate and initiating each heart beat. ... A heart rate that is too fast - above 100 beats per minute in adults - is called tachycardia and a heart rate that is too slow ...
*  Junctional tachycardia
It may be also be due to onset of acute coronary syndrome, heart failure, conduction system diseases with enhanced automaticity ...
*  Atrioventricular node
... or AV node is a part of the electrical conduction system of the heart that coordinates the top of the heart. It electrically ... Anatomy figure: 20:06-02 at Human Anatomy Online, SUNY Downstate Medical Center - "The conduction system of the heart." ... The cardiac conduction system (and AV node part of it) coordinates myocyte mechanical activity. A wave of excitation spreads ... This property is important because loss of the conduction system before the AV node should still result in pacing of the ...
*  Cardiac aberrancy
... is a type of aberration of the electrical conduction system of the heart. Aberration occurs when the action ... potential is conducting improperly, which can be due to: Heart block Wolff-Parkinson-White syndrome Electrocardiography. ...