Heart cardiac conduction atrioventricular node. Medical search. Frequent questions

Beta-blockers can be used to slow the heart rate in patients with arrhythmias such as atrial flutter and/or atrial fibrillation [1]. (escardio.org)
Arrhythmias and conduction disorders are described as radiation-induced complications of thoracic irradiations [ 5 ]. (allenpress.com)
With the development of cardiac conduction system delineation atlases [ 6 ], evaluating the relationship between conduction disorders or arrhythmias and conduction substructure exposure has become possible. (allenpress.com)
By following these tips, you can help to keep your AV node healthy and prevent heart arrhythmias. (medicaldeviceregistry.com)
A thorough comprehension of AV node function enhances our understanding of heart physiology and the basis for various arrhythmias. (medicaldeviceregistry.com)
Digoxin is a cardiac glycoside that has been used for many years in the treatment of heart failure and arrhythmias. (pharmacologymentor.com)
While its primary indication is for the treatment of heart failure, it also has antiarrhythmic properties that make it useful in managing certain types of cardiac arrhythmias , particularly atrial fibrillation and atrial flutter. (pharmacologymentor.com)
Arrhythmias and conduction disorders are caused by abnormalities in the generation or conduction of these electrical impulses or both. (msdmanuals.com)
Particularly in disease states, such as postinfarction myocardium, anisotropic conduction and spatial inhomogeneity of refractoriness may be implicated in the genesis of re-entrant, or even focal, arrhythmias. (radcliffe-group-non-prod.com)
Unravelling the mysteries of anisotropic conduction may also provide further insights into arrhythmias apparently unrelated to structural heart disease, such as atrioventricular nodal re-entry tachycardia and its enigmatic circuit. (radcliffe-group-non-prod.com)
The lower cell density in any of the cardiac nodes, especially in P cells of sinus node, can decrease electrical conduction within the nodes and in the internodal tracts, which would reflect the presence of cardiac arrhythmias derived from poor conduction, even in morphologically normal hearts. (unab.edu.co)
If there is disease of either the conduction system or the heart muscle itself, arrhythmias may result. (nymetrodisability.com)
Ventricular arrhythmias arising from the ventricular walls of the heart are a common cause of sudden death in people with coronary artery disease, accounting for several hundred thousand deaths yearly. (nymetrodisability.com)
Individuals with scar tissue from prior heart attacks are susceptible to abnormal electrical activation of the heart and resulting ventricular arrhythmias. (nymetrodisability.com)
ECGs are essential because of their relatively low cost and their non-invasive procedures in the initial assessment of heart conditions like ischemic heart disease and arrhythmias. (aedsuperstore.com)
Wynnewood, PA - Early experiences with an ambulatory electrocardiographic monitoring system have shown the device to be effective at detecting cardiac arrhythmias in patients with and without symptoms. (medscape.com)
Cite this: Ambulatory ECG monitoring effective at detecting wide range of cardiac arrhythmias - Medscape - Mar 24, 2005. (medscape.com)

Autopsy examination revealed diffuse inflammation within his heart muscle (myocardium), and particularly in the hearts unique cardiac impulse conduction system (around the sinoatrial and atrioventricular nodes). (andrewbostom.org)
Cholinesterase inhibitors, including ADLARITY, may have vagotonic effects on the sinoatrial and atrioventricular nodes. (adlarityhcp.com)

Severe bradycardia: Greater than first degree heart block, or sick sinus syndrome without a pacemaker. (nih.gov)
If, during treatment, heart rate decreases below 50 beats per minute (bpm) at rest or the patient experiences symptoms related to bradycardia such as dizziness, fatigue or hypotension, the dose must be titrated downward including the lowest dose of 2.5 mg twice daily. (medicines.org.uk)
Treatment must be discontinued if heart rate remains below 50 bpm or symptoms of bradycardia persist despite dose reduction. (medicines.org.uk)
After two weeks of treatment, the dose can be increased to 7.5 mg twice daily if resting heart rate is persistently above 60 bpm or decreased to 2.5 mg twice daily if resting heart rate is persistently below 50 bpm or in case of symptoms related to bradycardia such as dizziness, fatigue or hypotension. (medicines.org.uk)
If during treatment, heart rate decreases persistently below 50 beats per minute (bpm) at rest or the patient experiences symptoms related to bradycardia, the dose must be titrated downward to the next lower dose in patients receiving 7.5 mg twice daily or 5 mg twice daily. (medicines.org.uk)
Inherited cardiomyopathies may also be accompanied by cardiac conduction-system defects that affect the atrioventricular node, resulting in bradycardia. (duke.edu)
If the patient is symptomatic, standard advanced cardiac life support (ACLS) guidelines for bradycardia, including the use of atropine and transcutaneous pacing, are indicated. (medscape.com)
These effects may manifest as bradycardia or heart block in patients both with and without known underlying cardiac conduction abnormalities. (adlarityhcp.com)
If the AV node is not working properly, it can cause a heart arrhythmia, such as bradycardia (slow heart rate) or tachycardia (fast heart rate). (medicaldeviceregistry.com)
Heart rates below 60 beats/minute (bradycardia) or above 100 beats/minute (tachycardia) are abnormal by definition. (nymetrodisability.com)
Partial heart block causes a slow or irregular heartbeat (bradycardia or arrhythmia, respectively), and can lead to the buildup of scar tissue (fibrosis) in the cells that carry electrical impulses. (medlineplus.gov)
Symptomatic sinus bradycardia or bradycardia due to atrioventricular blockade, including transient. (who.int)

Most patients whose heart block is not otherwise treatable will require placement of a permanent pacemaker or an implantable cardioverter defibrillator (ICD). (medscape.com)
The sinus node, often called a pacemaker, is the starting point for generating a wave of electrical impulses that stimulates atrial contraction by creating an action potential via myocardial cells. (jagora-asbl.be)
Increased excitability in places other than the pacemaker site predisposes the heart to the development of ectopic heartbeat. (jagora-asbl.be)
The conductive tissue that has the fastest automaticity acts as the pacemaker of the heart. (electricalvoice.com)
In case one pacemaker tissue fails to act, the conduction tissue with next highest intrinsic rate will gain control of the pacing function of the heart. (electricalvoice.com)
The AV node receives electrical signals from the sinoatrial node (SA node), which is the heart's natural pacemaker. (medicaldeviceregistry.com)
Electrical discharge of these pacemaker cells stimulates adjacent cells, leading to stimulation of successive regions of the heart in an orderly sequence. (msdmanuals.com)
The right atrium is where the heart's natural pacemaker (sino atrial node) can be found. (heartrhythmclinic.com)
The use of an additional pacemaker lead to stimulate the left ventricle so as to improve performance of the heart (biventricular pacing). (heartrhythmclinic.com)
Used in conjunction with a pacemaker or implantable cardiac defibrillator. (heartrhythmclinic.com)
The Sinoatrial node (SA node) in the right atrium works like an internal pacemaker. (proacls.com)
Pacemaker is a small electronic device, implanted below the collarbone and are connected to the heart with wires or leads to the right chambers of the heart. (taiwannews.com.tw)
In vascular smooth muscle and cardiac myocytes, calcium influx stimulates muscle contraction and in nodal tissue, it plays an important role in pacemaker currents. (precisionbusinessinsights.com)
These signals begin in a specialized cluster of cells called the sinoatrial node (the heart's natural pacemaker) located in the heart's upper chambers (the atria). (medlineplus.gov)
The normal cardiac impulse of the vertebrate heart originates in the pacemaker cells of the sinoatrial node, located in the right atrium. (medscape.com)
The family background of the young boy revealed that a sister had suffered sudden cardiac death (SCD), even though she had been treated with pacemaker implantation and amiodarone. (bvsalud.org)

The atrioventricular node delays impulses by approximately 0.09s. (wikipedia.org)
In a healthy heart, all activities and rest during each individual heart cycle or heartbeat are initiated and orchestrated by signals from the heart`s electrical conduction system, which is the heart`s « wiring » that carries electrical impulses through the body of cardiomyocytes, the heart`s specialized muscle cells. (jagora-asbl.be)
And they provide a complex and persistent signal system that controls the rhythmic beat of heart muscle cells, especially the generation of complex impulses and muscle contractions in the ear chambers. (jagora-asbl.be)
These impulses reach atrioventricular node along the surface of both atria. (electricalvoice.com)
In terms of its antiarrhythmic effects, digoxin slows down the conduction of electrical impulses through the atrioventricular (AV) node. (pharmacologymentor.com)
This is particularly useful in conditions like atrial fibrillation or atrial flutter, where electrical impulses can bombard the AV node at a very high rate. (pharmacologymentor.com)
The normal heart beats in a regular, coordinated way because electrical impulses generated and spread by myocytes with unique electrical properties trigger a sequence of organized myocardial contractions. (msdmanuals.com)
Impulses are transmitted through the atria to the atrioventricular (AV) node via preferentially conducting internodal tracts and unspecialized atrial myocytes. (msdmanuals.com)
This node generates electrical impulses at a rate of 60-100 times per minute. (proacls.com)
If the SA node, the primary impulse generator, does not work properly, the AV node can send its own impulses instead. (proacls.com)
If neither the SA or AV node produces impulses properly, the Purkinje fibers will generate the impulse. (proacls.com)
The atrioventricular node delays impulses for ~0.1 second before allowing impulses through to the His-Purkinje conduction system, which spreads impulses to the ventricular walls. (wikidoc.org)
There are two small pieces of nerve tissue known as the sinoatrial node (SA node) and the atrioventricular node (A-V node) that start and control electrical impulses into the His Bundle. (nymetrodisability.com)
Additionally, electrical impulses may start in areas of the heart out of normal sequence so that the heart contracts abnormally and blood is suboptimally ejected into the circulation. (nymetrodisability.com)
The human heart has a system of conducting electrical signals through itself which are responsible for the beating of the heart due to the contraction of cardiac tissue in response to these impulses. (hs770.com)
Electrical impulses move from the sinoatrial node down to the bundle branches, stimulating a normal heartbeat in which the ventricles contract slightly later than the atria. (medlineplus.gov)

By blocking catecholamine-induced increases in heart rate, in velocity and extent of myocardial contraction, and in blood pressure, metoprolol reduces the oxygen requirements of the heart at any given level of effort, thus making it useful in the long-term management of angina pectoris. (nih.gov)
In several studies of patients with acute myocardial infarction, intravenous followed by oral administration of metoprolol caused a reduction in heart rate, systolic blood pressure and cardiac output. (nih.gov)
There are two major types of cardiac muscle cells: myocardial contractile cells and myocardial conducting cells. (lumenlearning.com)
The myocardial conducting cells (1 percent of the cells) form the conduction system of the heart. (lumenlearning.com)
Myocardial conduction cells initiate and propagate the action potential (the electrical impulse) that travels throughout the heart and triggers the contractions that propel the blood. (lumenlearning.com)
Digoxin works by inhibiting the sodium-potassium ATPase pump in the myocardial (heart muscle) cells. (pharmacologymentor.com)
1 Nevertheless, changes in microanatomical structures, such as cellular coupling, gap junction distribution and function and fibre disarray, lead to anisotropic conduction, i.e. dependence of myocardial velocity on myocyte orientation. (radcliffe-group-non-prod.com)
Investigations for myocardial infarction and calcification of the aortic valve annulus were negative (i.e., no elevation in cardiac enzymes, and normal chest radiography and transthoracic echocardiography). (cmaj.ca)
Ca+ channel antagonists block the calcium by binding to the L-type calcium channels, thereby resulting in smooth muscle relaxation, decreased myocardial force generation, decreased heart rate, and decreased conduction velocity at the atrioventricular node. (precisionbusinessinsights.com)
The disease can further pave the way for myocardial infarction (heart attack) or cardiac arrest, both of which can be fatal. (hs770.com)

AV conduction during normal cardiac rhythm occurs through two different pathways: the first "pathway" has a slow conduction velocity but shorter refractory period the second "pathway" has a faster conduction velocity but longer refractory period. (wikipedia.org)
It has a slow conduction velocity and thus delays impulse transmission. (msdmanuals.com)
2 Anisotropic conduction was initially attributed to conduction tissue, such as the atrioventricular (AV) node, but we know now that in cardiac tissue, in general, conduction velocity is anisotropic. (radcliffe-group-non-prod.com)

The AV node receives two inputs from the right atrium: posteriorly, via the crista terminalis, and anteriorly, via the interatrial septum. (wikipedia.org)
There are two atria in the human heart - the left atrium receives blood from the pulmonary circulation, and the right atrium receives blood from the venae cavae of the systemic circulation. (wikipedia.org)
The right atrium and ventricle are often referred to together as the right heart, and the left atrium and ventricle as the left heart. (wikipedia.org)
The right atrium receives and holds deoxygenated blood from the superior vena cava, inferior vena cava, anterior cardiac veins, smallest cardiac veins and the coronary sinus, which it then sends down to the right ventricle through the tricuspid valve, which in turn sends it to the pulmonary artery for pulmonary circulation. (wikipedia.org)
The sinoatrial node (SA node) is located in the posterior aspect of the right atrium, next to the superior vena cava. (wikipedia.org)
The blue arrows show the way blood is brought to the heart by the vena cavae , passes through the right atrium and ventricle, and then out through the pulmonary artery . (daviddarling.info)
The rhythmic sequence (or sinus rhythm) of this signal transmission through the heart is coordinated by two groups of specialized cells, the sinus node (AS), located in the upper wall of the right atrium, and the atrioventricular (AV) node, located in the lower wall of the right heart between the atrium and ventricle. (jagora-asbl.be)
Sinoatrial node is present in the right atrium. (electricalvoice.com)
The area of the right atrium that initiates the heart beat. (heartrhythmclinic.com)

The AV node lies at the lower back section of the interatrial septum near the opening of the coronary sinus, and conducts the normal electrical impulse from the atria to the ventricles. (wikipedia.org)
This delay in the cardiac pulse is extremely important: It ensures that the atria have ejected their blood into the ventricles first before the ventricles contract. (wikipedia.org)
This property is important because loss of the conduction system before the AV node should still result in pacing of the ventricles by the slower pacemaking ability of the AV node. (wikipedia.org)
Atrioventricular conduction disease (AV block) describes impairment of the electrical continuity between the atria and ventricles. (wikipedia.org)
The blood in the atria is pumped into the heart ventricles through the atrioventricular mitral and tricuspid heart valves. (wikipedia.org)
During the cardiac cycle the atria receive blood while relaxed in diastole, then contract in systole to move blood to the ventricles. (wikipedia.org)
The cardiac action potential then spreads across both atria causing them to contract, forcing the blood they hold into their corresponding ventricles. (wikipedia.org)
Third-degree atrioventricular (AV) block, also referred to as third-degree heart block or complete heart block (CHB), is an abnormal heart rhythm resulting from a defect in the cardiac conduction system in which there is no conduction through the atrioventricular node (AVN), leading to complete dissociation of the atria and ventricles. (medscape.com)
Supraventricular tachycardia (SVT) is an arrhythmia initiated above the ventricles, at or above the atrioventricular (AV) node. (aclsonline.us)
The two ventricles are thick-walled chambers that forcefully pump blood out of the heart. (daviddarling.info)
The valves between the atria and ventricles are called atrioventricular valves (also called cuspid valves), while those at the bases of the large vessels leaving the ventricles are called semilunar valves . (daviddarling.info)
When the ventricles contract, atrioventricular valves close to prevent blood from flowing back into the atria. (daviddarling.info)
Stages 1 and 2 together - « isovolumic relaxation » plus influx (equivalent to « rapid influence », « diastasis » and « atrial systole ») - include the « diastole » ventricular period, including the atrial systole, in which blood returning to the heart flows through the atria into the relaxed ventricles. (jagora-asbl.be)
The heart contains a special cell that generates and transmits pulses from atria to ventricles. (electricalvoice.com)
It is located in the center of the heart, between the atria (the upper chambers of the heart) and the ventricles (the lower chambers of the heart). (medicaldeviceregistry.com)
The AV node slows down the electrical signals before they travel to the ventricles. (medicaldeviceregistry.com)
If the AV node did not slow down the electrical signals, the ventricles would contract too soon and not have enough time to fill with blood. (medicaldeviceregistry.com)
It ensures the sequential contraction of the heart chambers by slowing down the electrical signal between the atria and ventricles, promoting efficient blood pumping. (medicaldeviceregistry.com)
The electrical delay caused by the AV node allows the atria to contract and complete their pumping action before the ventricles contract. (medicaldeviceregistry.com)
The AV node delays the electrical impulse from the atria to the ventricles, allowing time for the atria to contract and complete ventricular filling. (ekgtechs.com)
The P wave preceding the ventricular complex is assumed to be that which conducts through the AV node to the ventricles. (avma.org)
A critical part of the heart's electrical conduction system connecting the electrical system in the atria to that in the ventricles. (heartrhythmclinic.com)
The delay in the AV node allows the ventricles to beat independently of the atria so the heart can operate in a double-pump action. (proacls.com)
The interventricular septum (IVS) accommodates the ventricular portion of the conduction system and contributes to the mechanical function of both ventricles. (encyclopedia.pub)
The atrioventricular node is an area of specialized tissue between the atria and the ventricles of the heart , which conducts the normal electrical impulse from the atria to the ventricles. (wikidoc.org)
The reason it is important to delay the cardiac impulse is to ensure that the atria have ejected their blood into the ventricles before the ventricles contract. (wikidoc.org)
The bundles are the normal conduction pathways for an impulse going through the ventricles. (ecgedu.com)
Heart block occurs when the electrical signaling is obstructed anywhere from the atria to the ventricles. (medlineplus.gov)
Fibrosis contributes to the development of complete heart block, resulting in uncoordinated electrical signaling between the atria and the ventricles and inefficient pumping of blood in the heart. (medlineplus.gov)
These channels play a major role in signaling the start of each heartbeat, coordinating the contractions of the atria and ventricles, and maintaining a normal heart rhythm . (medlineplus.gov)
[ 1 ] The impulse is then conducted through the atrium to the atrioventricular junction from where, after a delay, the electrical signal is propagated to the ventricles along bundles of specialized conduction tissue to the distal Purkinje fibers, which ramify among the contractile myocardium. (medscape.com)

The outer layer of the heart wall is the epicardium, the middle layer is the myocardium, and the inner layer is the endocardium . (daviddarling.info)
The walls of the heart are largely made from myocardium, which is a special kind of muscle tissue. (daviddarling.info)
Differences in thickness of the heart chamber walls are due to variations in the amount of myocardium present, which reflects the amount of force each chamber is required to generate. (daviddarling.info)
The myocardium of the heart can generate its own electrical impulse, an ability called automaticity. (proacls.com)
The cardiac conduction system can be anatomically, developmentally, and molecularly distinguished from the working myocardium. (medscape.com)

Atrioventricular nodal re-entry tachycardia, which is caused by a dual AV node physiology and AVNRT can only occur in people with it, however almost half of the population have it, though only a few of them will develop AVNRT at some point in life. (wikipedia.org)

They also have anti-arrhythmic effects since they decrease spontaneous firing of ectopic pacemakers, slow conduction, and increase the refractory period of the atrioventricular (AV) node [1]. (escardio.org)
Cardiac muscle cells undergo twitch-type contractions with long refractory periods followed by brief relaxation periods. (lumenlearning.com)
We have created a mathematical network model of the AV node where continuous estimation of the refractory period and conduction delay from 24-hour ambulatory ECGs from patients with permanent AF (n=59) was achieved using a problem-specific genetic algorithm. (lu.se)

it is part of the electrical conduction system of the heart. (wikipedia.org)
The cardiac conduction system (and AV node part of it) coordinates myocyte mechanical activity. (wikipedia.org)
PL: atria) is one of the two upper chambers in the heart that receives blood from the circulatory system. (wikipedia.org)
The atrioventricular node (AV node) is another node in the cardiac conduction system. (wikipedia.org)
AV block results from various pathologic states causing infiltration, fibrosis, or loss of connection in portions of the healthy conduction system. (medscape.com)
The exposition of cardiac conduction system during breast radiation therapy has never been studied, despite the increasing use of intensity-modulated radiation therapy, which exposes larger volume to low-dose bath. (allenpress.com)
The existence of a tetrafascicular intraventricular conduction system is widely accepted by researchers. (bvsalud.org)
In this article, we will talk about heart Cardiac Conduction System. (electricalvoice.com)
The Cardiac Conduction System is shown in the figure below. (electricalvoice.com)
It refers to the ability of each cell of the conduction system to conduct individual electrical impulse from one cell to another cell. (electricalvoice.com)
Its intricate electrical conduction system ensures proper coordination between atrial and ventricular contractions, maintaining effective cardiac output. (medicaldeviceregistry.com)
What is the role of the AV node in the cardiac conduction system? (medicaldeviceregistry.com)
The AV node serves as a crucial part of the cardiac conduction system. (medicaldeviceregistry.com)
In part 4, Sue provides an overview of the conduction system, including explanations of how the atrioventricular and sinoatrial nodes work. (ausmed.com)
Bundle of Kent, Heart Conduction System [Hyper. (sensagent.com)
When the RCA supplies the AV node, the coronary system is said to be "right dominant," and when the AV node is supplied by the LCX, the system is "left dominant. (wikidoc.org)
The conduction system of the heart consists of nerves that branch into increasingly smaller branches. (nymetrodisability.com)
This whole system is collectively known as the cardiac conduction system. (hs770.com)
Abnormalities in cardiac conduction can occur due to a variety of factors, including developmental and congenital defects, acquired injury or ischemia of portions of the conduction system, or less commonly due to inherited diseases that alter cardiac conduction system function. (medscape.com)
So called 'idiopathic' conduction system degeneration may have familial clustering, and therefore is consistent with a hereditary basis. (medscape.com)
This 'Molecular Perspectives' will highlight several diverse mechanisms of isolated conduction system disease as well as conduction system degeneration associated with other cardiac and non-cardiac disorders. (medscape.com)
The first part of this review focuses on channelopathies associated with conduction system disease. (medscape.com)
Human genetic studies have identified mutations in the sodium channel SCN5A gene causing tachyarrhythmia disorders, as well as progressive cardiac conduction system diseases, or overlapping syndromes. (medscape.com)
Next, the importance of embryonic developmental genes such as homeobox and T-box transcription factors are highlighted in conduction system development and function. (medscape.com)
Conduction system diseases associated with multisystem disorders, such as muscular and myotonic dystrophies, will be described. (medscape.com)
Last, a new glycogen storage cardiomyopathy associated with ventricular preexcitation and progressive conduction system degeneration will be reviewed. (medscape.com)
The heart achieves the coordinated contraction of the atrial and ventricular chambers due to the precise timing of the cardiac conduction system (CCS), a specialized complex and heterogeneous network of cells that initiate and allow propagation of action potentials through the heart. (medscape.com)
Inherited conduction system diseases can be life threatening and, although relatively uncommon overall, are known cause of mortality and morbidity in selected populations. (medscape.com)
Knowledge derived from human genetics and from experimental studies in engineered animal models has led to the discovery of multiple molecular defects responsible for progressive conduction system diseases. (medscape.com)
The system provides telemetry that is available only in the hospitals at this point in time," lead investigator Dr Ajay Joshi (Lankenau Hospital, Wynnewood, PA) told heart wire . (medscape.com)
Publishing their early experiences with the mobile cardiac outpatient telemetry system, known as MCOT (CardioNet, San Diego, CA), in the April 2005 issue of the American Journal of Cardiology , the investigators write that "compared with Holter monitoring and external loop recorders, MCOT increases the sensitivity of detecting atrial fibrillation without symptoms by providing a longer period of monitoring and without the need for patient activation. (medscape.com)

Clinical pharmacology studies have demonstrated the beta-blocking activity of metoprolol, as shown by (1) reduction in heart rate and cardiac output at rest and upon exercise, (2) reduction of systolic blood pressure upon exercise, (3) inhibition of isoproterenol-induced tachycardia, and (4) reduction of reflex orthostatic tachycardia. (nih.gov)
Supraventricular tachycardia may occur intermittently, and an individual may experience regular heart rates between episodes. (aclsonline.us)
If frequent episodes of supraventricular tachycardia occur over time and go untreated, the heart may become weakened, contributing to the development of heart failure. (aclsonline.us)
Cessation of an effective heart beat due to either slowing or ventricular fibrillation/ventricular tachycardia. (heartrhythmclinic.com)
An implanted device connected to the heart via leads which are capable of delivering shock treatment internally should the heart go into ventricular tachycardia or ventricular fibrillation. (heartrhythmclinic.com)
OBJECTIVE To assess the efficacy and safety of intravenous dofetilide in preventing induction of atrioventricular re-entrant tachycardia. (bmj.com)
Fifty one patients with electrically inducible atrioventricular re-entrant tachycardia were allocated to one of five doses of dofetilide (1.5, 3, 6, 9, and 15 μg/kg), two thirds of the dofetilide dose being given over a 15 minute loading period and the remainder over a 45 minute maintenance period. (bmj.com)
MAIN OUTCOME MEASURE Responders were defined as patients in whom dofetilide prevented reinduction of atrioventricular re-entrant tachycardia at the end of the infusion. (bmj.com)
In non-responders, dofetilide increased the cycle length of induced atrioventricular re-entrant tachycardia. (bmj.com)
CONCLUSIONS Dofetilide shows promise as an agent for the prevention of atrioventricular re-entrant tachycardia in patients without structural heart disease. (bmj.com)
Atrioventricular re-entrant tachycardia is currently treated with various pharmacological agents. (bmj.com)
While class I antiarrhythmic drugs are effective in treating this form of tachycardia, there is a reluctance to use these agents, especially in patients with structural heart disease, because of potential proarrhythmia or undesirable side effects-as seen in the cardiac arrhythmia suppression trial (CAST). (bmj.com)
14-16 However, to date there have been no studies on the dose dependent effects of dofetilide on atrioventricular re-entrant tachycardia. (bmj.com)
Our goal in this study was to assess the efficacy of intravenous dofetilide, in five different dosing regimens, for treating patients with inducible atrioventricular re-entrant tachycardia, by determining its ability to prevent reinduction of the tachycardia. (bmj.com)
Tachycardia can drive heart rates into the several hundred beats/minute range with resultant symptoms. (nymetrodisability.com)
Ventricular tachycardia (VT) is present when there are 3 abnormal ventricular heart beats in a row. (nymetrodisability.com)
Some examples include atrial fibrillation, complete heart block, ventricular tachycardia, and bundle branch block. (ecgedu.com)
Ventricular tachycardia is a type of abnormal heart rhythm characterized by a rapid heartbeat. (ecgedu.com)

This cardiac rhythm occurs due to improper electrical conduction within the heart that disrupts the coordination of heartbeats. (aclsonline.us)
Examples of actions to take include managing the patient's airway and supplying supplemental oxygen if needed, determining the patient's cardiac rhythm, obtaining intravenous (IV) access, initiating defibrillation or cardioversion, and monitoring vital signs. (aclsonline.us)
The patient's clinical condition and cardiac rhythm will indicate which ACLS algorithm should be followed at this stage of care. (aclsonline.us)
He was found unconscious hunched by the bedside at 8:00 AM. Rushed to the emergency department, his electrocardiogram (ECG) showed ventricular fibrillation (a chaotic and lethal heart rhythm if not corrected), and despite 2-hours of cardiopulmonary resuscitation efforts, he could not be resuscitated. (andrewbostom.org)
Ivabradine is indicated for the symptomatic treatment of chronic stable angina pectoris in coronary artery disease adults with normal sinus rhythm and heart rate ≥ 70 bpm. (medicines.org.uk)
Ivabradine is indicated in chronic heart failure NYHA II to IV class with systolic dysfunction, in patients in sinus rhythm and whose heart rate is ≥ 75 bpm, in combination with standard therapy including beta-blocker therapy or when beta-blocker therapy is contraindicated or not tolerated. (medicines.org.uk)
Sympathetic stimulation accelerates heart rate and increases AV node conduction speed, while parasympathetic stimulation slows down heart rate and reduces AV node conduction speed, allowing the heart's rhythm to adjust according to the body's needs. (medicaldeviceregistry.com)
Any heart disorder, including congenital abnormalities of structure (eg, accessory atrioventricular connection) or function (eg, hereditary ion channelopathies), can disturb rhythm. (msdmanuals.com)
Recording of the heart rhythm for 24 hours or longer by a portable ECG recording machine. (heartrhythmclinic.com)
Abnormal heart rhythm, slow or fast, sometimes irregular, often giving rise to symptom of palpitation. (heartrhythmclinic.com)
Astaff member skilled in interpreting and providing information on your heart rhythm. (heartrhythmclinic.com)
The use of a small energy shock to stop a fast or irregular heart rhythm. (heartrhythmclinic.com)
Delivery of an internal or external shock (usually at high energy levels) to restore the heart to normal rhythm from ventricular fibrillation. (heartrhythmclinic.com)
An external recording device to record heart rhythm. (heartrhythmclinic.com)
An implanted monitor which records heart rhythm continuously for up to 3 years. (heartrhythmclinic.com)
An implanted device connected to the heart via pacing leads which control heart rhythm. (heartrhythmclinic.com)
Heart Rhythm Clinic plans to offer this service to its patients in the very near future. (heartrhythmclinic.com)
Death within 1 hour of the onset of symptoms, frequently caused by abnormal heart rhythm and often associated with heart attacks. (heartrhythmclinic.com)
Cardiac resynchronization therapy (CRT) is a treatment prescribed to help heart beat with the correct rhythm. (taiwannews.com.tw)
Atrial fibrillation is a type of abnormal heart rhythm characterized by an irregular and rapid heartbeat. (ecgedu.com)
Complete heart block is a type of abnormal heart rhythm typically characterized by a slow or absent heartbeat. (ecgedu.com)
Their heart rhythm is being monitored constantly. (medscape.com)
The transition of atrioventricular blockade of the II-III degree to the 1st degree or complete normalization of atrioventricular conduction at the sinus rhythm. (who.int)

Contraction of heart muscle cells requires depolarization and repolarization of their cell membranes. (wikipedia.org)
Early beats occur within the atria of the heart due to improperly functioning electrical connections, resulting in a rapid heart rate such that the heart does not have enough time to fill the atria with blood before contraction of the atria. (aclsonline.us)
S1 is the sound produced by the closure of the atrioventricular valves during ventricular contraction and is usually described as « lub » or first heart tone. (jagora-asbl.be)
The fourth cardiac tone, S4, results from the contraction of the atria pushing blood into a stiff or hypertrophic ventricle, indicating failure of the left ventricle. (jagora-asbl.be)
To sum up, the atrioventricular (AV) node plays a pivotal role in regulating the synchronized contraction of the heart chambers. (medicaldeviceregistry.com)
It is a delay in the normal sequential AV contraction, due to delayed conduction through the AV node. (taiwannews.com.tw)
This refers to abnormal timing of contraction of the left atrium (LA) with respect to the LV impairs cardiac function. (taiwannews.com.tw)

Three layers of tissue form the heart wall. (daviddarling.info)
The assembly includes a circumferential ablation element which is adapted to ablate a circumferential region of tissue along a pulmonary vein wall which circumscribes the pulmonary vein lumen, thereby transecting the electrical conductivity of the pulmonary vein against conduction along its longitudinal axis and into the left atrium. (justia.com)
More specifically, it is a circumferential ablation device assembly which is adapted to ablate a selected circumferential region of tissue along a pulmonary vein wall and thereby form a circumferential conduction block against conduction along the longitudinal axis of the pulmonary vein wall. (justia.com)
The region of the sinus and atrioventricular nodes was sectioned serially, and the block of tissue removed for study. (unab.edu.co)
It meant that the people who have controlled blood pressure have healthier hearts and intact cardiac tissue as compared to those whose B.P. usually exceeds the normal range. (hs770.com)
Other causes of heart block can include the use of certain medications or an infection of the heart tissue. (medlineplus.gov)

Initial triage of patients with complete heart block consists of determining symptoms, assessing vital signs, and looking for evidence of compromised peripheral perfusion. (medscape.com)
This arrhythmia affects individuals differently - some people live their lives without a need for treatment options or restrictions, whereas others require medication, lifestyle changes, or procedures to manage or terminate the rapid heart rate or associated symptoms. (aclsonline.us)
Beta-blockers and/or calcium channel blockers are first-line treatment to control heart rate and anginal symptoms (Class I, Level A) [3]. (escardio.org)
Phenotypically, patients with familial dilated cardiomyopathy (FDC) show enlargement of all four chambers of the heart and develop symptoms of congestive heart failure. (duke.edu)
If you are experiencing any symptoms of a heart arrhythmia, such as chest pain, shortness of breath, or dizziness, it is important to see a doctor right away. (medicaldeviceregistry.com)
A treatment to cure or improve symptoms related to fast heart rhythms, involving passage of wires through the blood vessels to enable treatment to be given to an area of electrical abnormality. (heartrhythmclinic.com)
more strenuous activities might cause symptoms to appear at much higher heart rates such as 60 beats/minute (BPM) during those activities. (nymetrodisability.com)
Modern day Electrocardiography (ECG) is a key component in the beginning evaluation of individuals who exhibit cardiac symptoms. (aedsuperstore.com)
The different types of progressive familial heart block have similar signs and symptoms. (medlineplus.gov)

Kcne1 CreERt2 ) did not demonstrate conduction defects. (northwestern.edu)

Bundle branch block is a type of conduction abnormality characterized by wide QRS complexes following P waves. (ecgedu.com)
We found almost every describable cardiac arrhythmia or conduction abnormality in the patients. (medscape.com)

Scholars@Duke publication: Linkage of familial dilated cardiomyopathy with conduction defect and muscular dystrophy to chromosome 6q23. (duke.edu)

Abnormalities seen in BMP and Alk3 are associated with some cardiovascular diseases like Ebstein's anomaly and AV conduction disease. (wikipedia.org)
Abnormal ECG readings can indicate a variety of conditions ranging from minor abnormalities to life-threatening cardiac conditions. (ecgedu.com)
Understanding of the molecular and ionic mechanisms underlying cardiac conduction is essential for the appreciation of the pathogenesis of conduction abnormalities in structurally normal and altered hearts. (medscape.com)

If the noise is heard later in life, it may indicate congestive heart failure, which warrants further testing. (jagora-asbl.be)
Used for heart rate control in coronary artery disease and congestive heart failure . (pharmacologymentor.com)

Occasionally, first-degree AV block may be associated with other conduction disturbances, including bundle-branch block and fascicular blocks (bifascicular or trifascicular block). (medscape.com)
After the AV node, the electrical signals travel down the bundle of His and then to the Purkinje fibers. (medicaldeviceregistry.com)
There, the bundle of His, the continuation of the AV node, enters the top of the interventricular septum, where it bifurcates into the left and right bundle branches, which terminate in Purkinje fibers. (msdmanuals.com)
The intraventricular dyssynchrony segment spearheaded the market in 2019 in terms of revenue attributed to comparatively higher incidence of intraventricular dyssynchrony among patients with heart failure and left bundle branch block. (taiwannews.com.tw)
The largest cardiac nerve is called the Bundle of His . (nymetrodisability.com)
They are due to a conduction delay in the left or right bundle. (ecgedu.com)
From there, a group of cells called the atrioventricular node carries the electrical signals to another cluster of cells called the bundle of His. (medlineplus.gov)
In types IA and IB, the heart block originates in the bundle branch, and in type II, the heart block originates in the atrioventricular node. (medlineplus.gov)

Cystic tumour of atrioventricular nodal region (CTAVN) CTAVN is of endodermal origin and occurs exclusively in the area of the AV node, tricuspid valve, and interatrial septum. (wikipedia.org)
Significant beta-blocking effect (as measured by reduction of exercise heart rate) occurs within one hour after oral administration, and its duration is dose related. (nih.gov)
Heart block occurs when slowing or complete block of this conduction occurs. (medscape.com)
Atrioventricular (AV) dyssynchrony occurs when there is an unfavorable difference in timing between atrial and ventricular contractions. (taiwannews.com.tw)
This occurs by a wave of electrical activity that starts at slightly different times in different parts of the heart. (nymetrodisability.com)
The most common cause of heart block is fibrosis of the heart, which occurs as a normal process of aging. (medlineplus.gov)

including the prevention of sudden cardiac death [1]. (escardio.org)
Why is Rhode Island's Department of Health Stonewalling About a 37-Year-Old Rhode Island Woman's Post-Covid-19 mRNA Vaccine Sudden Cardiac Death? (andrewbostom.org)
This tragic case was analyzed in the October 2021 issue of the Journal of Korean Medical Sciences , and the authors concluded the recruit's sudden cardiac death was caused by a covid-19 vaccine-induced myocarditis (heart inflammation), which triggered a paroxysmal, fatal arrhythmia. (andrewbostom.org)
A similar sudden cardiac death (SCD) case-this time in a healthy 27-year-old Japanese athlete-occurred 8-days after he received another covid-19 mRNA vaccine (i.e. (andrewbostom.org)
Both German and Korean populations subjected to systematic autopsy of persons dying suddenly within a week (Korea), or up to 20-days (Germany) after covid-19 vaccination, have confirmed the causal association between covid-19 mRNA vaccine-induced myocarditis, and sudden cardiac death (SCD) among men, and less commonly, women. (andrewbostom.org)
These devices prevent sudden cardiac death. (heartrhythmclinic.com)
Our comprehensive AED resource center provides you with all the information you need for automated external defibrillators (AEDs), sudden cardiac arrest (SCA), cardiopulmonary resuscitation (CPR), and other heart health topics. (aedsuperstore.com)
Complete heart block can cause a sensation of fluttering or pounding in the chest (palpitations), shortness of breath, fainting (syncope), or sudden cardiac arrest and death. (medlineplus.gov)

Based on the Cardiac Arrhythmia Suppression Trial study results, flecainide is not recommended in patients with structural heart disease due to high proarrhythmic risk. (wjgnet.com)
Based on the Cardiac Arrhythmia Suppression Trial study results, flecainide is contraindicated for patients with structural heart disease due to high proarrhythmic risk. (wjgnet.com)

They are indicated if STEMI patients also have heart failure or LV dysfunction (Class I, Level A) [2]. (escardio.org)
However, outcome could be adversely affected by sinus node dysfunction (SND). (bvsalud.org)

Ventricular fibrillation (VF) is an arrhythmia found in cardiac arrest. (nymetrodisability.com)
In ventricular fibrillation, the heart's electrical activity is further decreased, and no blood is being pumped from the heart to the rest of the body. (nymetrodisability.com)

Note that not all patients with AV dissociation have complete heart block. (medscape.com)
On electrocardiography (ECG), complete heart block is represented by QRS complexes being conducted at their own rate and totally independent of the P waves (see the image below). (medscape.com)
Electrocardiogram from patient in complete heart block. (medscape.com)
The first, and sometimes most important, medical treatment for heart block is the withdrawal of any potentially aggravating or causative medications. (medscape.com)
Medical treatment of complete heart block is limited to patients with conduction disease in the AVN. (medscape.com)
Traditionally, atrioventricular (AV) block can be classified into first-, second-, and third-degree block. (medscape.com)
Thus, first-degree AV block represents delay or slowing of conduction. (medscape.com)
Second-degree atrioventricular (AV) block in the asymptomatic patient does not require any specific therapy in the prehospital setting. (medscape.com)
Second-degree block at the level of the atrioventricular node (AVN) may be due to digoxin, beta-blockers, or calcium channel blockers. (medscape.com)
Mobitz II block is more likely to progress to complete heart block and thus requires a different approach. (medscape.com)
Except for the use of atropine in selected cases of transient AV block, permanent cardiac pacing has replaced medical interventions in the treatment of patients with symptomatic, otherwise untreatable, AV block. (medscape.com)
Transcutaneous pacing pads should be applied to all patients with Mobitz II second-degree AV block, including those who are asymptomatic patients, because such patients have a propensity to progress to complete heart block. (medscape.com)
If the AV node malfunctions, it can lead to irregular heart rhythms or atrioventricular block. (medicaldeviceregistry.com)
It may indicate first-degree heart block. (ekgtechs.com)
It produces a transient block in the atrioventricular node. (pharmacologymentor.com)
This invention is a circumferential ablation device assembly which is adapted to forming a circumferential conduction block in a pulmonary vein. (justia.com)
Notice that there is a 3:1 AV conduction block except at 1 point (asterisk), at which there is a depolarization indicative of a beat conducted after a 2:1 AV conduction block. (avma.org)
Electrocardiography showed temporary total atrioventricular block (not shown). (cmaj.ca)
Later that day, second-degree Mobitz type I atrioventricular block with intermittent junctional escape developed (Appendix 1, available at www.cmaj.ca/lookup/suppl/doi:10.1503/cmaj.141468/-/DC1 ). (cmaj.ca)
In a situation when there is a disruption of normal electrical conduction through the heart due to the delay in the cardiac signals, the condition is termed cardiac conduction disease (CCD) or heart block . (hs770.com)
Tamoxifen-induced loss of ZO-1 led to atrioventricular (AV) block without changes in heart rate, as measured by ECG and ex vivo optical mapping. (northwestern.edu)
Progressive familial heart block is a genetic condition that alters the normal beating of the heart. (medlineplus.gov)
In people with progressive familial heart block, the condition worsens over time: early in the disorder, the electrical signals are partially blocked, but the block eventually becomes complete, preventing any signals from passing through the heart. (medlineplus.gov)
Progressive familial heart block can be divided into type I and type II, with type I being further divided into types IA and IB. (medlineplus.gov)
Most cases of heart block are not genetic and are not considered progressive familial heart block. (medlineplus.gov)
The prevalence of progressive familial heart block is unknown. (medlineplus.gov)
worldwide, about 1 in 2,500 individuals have complete heart block. (medlineplus.gov)
Mutations in the SCN5A and TRPM4 genes cause most cases of progressive familial heart block types IA and IB, respectively. (medlineplus.gov)
The SCN5A and TRPM4 gene mutations that cause progressive familial heart block alter the normal function of the channels. (medlineplus.gov)
As a result of these channel alterations, cardiac cells have difficulty producing and transmitting the electrical signals that are necessary to coordinate normal heartbeats, leading to heart block. (medlineplus.gov)
Death of these impaired cardiac cells over time can lead to fibrosis, worsening the heart block. (medlineplus.gov)
Mutations in other genes, some of which are unknown, account for the remaining cases of progressive familial heart block. (medlineplus.gov)
In most cases, an affected person has one parent with progressive familial heart block. (medlineplus.gov)
Transient atrioventricular block of II-III degree or permanent block of II degree. (who.int)

This illustration shows the cords or heart-strings which hold the mitral and tricuspid valves in their correct position. (daviddarling.info)

the SA node generates the initial electrical impulse of each normal heart beat. (msdmanuals.com)
The sinoatrial (sinus) node (1) initiates an electrical impulse that flows through the right and left atria (2), making them contract. (msdmanuals.com)
When the electrical impulse reaches the atrioventricular node (3), it is delayed slightly. (msdmanuals.com)
From the SA node in the atria, an electrical impulse travels to the atrioventricular node (AV node). (proacls.com)
The cardiac nodes are the source of the electrical impulse that is transmitted to the heart, the aim of this work is study the histological and morphometric characteristics of the different components of the sinus and atrioventricular nodes in horses and dogs that help to know the physiopathology of these nodes. (unab.edu.co)

The pathway of this electrical signal includes a passage from the sinoatrial node (S.A. node) to the atrioventricular node (A.V. node) followed by travel through the bundles of His and Purkinje fibers. (hs770.com)

This is the property of the AV node that prevents rapid conduction to the ventricle in cases of rapid atrial rhythms, such as atrial fibrillation or atrial flutter. (wikipedia.org)
Blockage of a heart artery resulting in death of some or most of the heart muscle, leading to damage to pump action, frequently to abnormal heart rhythms and sometimes to death. (heartrhythmclinic.com)
Fast heart rhythms involving the atria, often causing palpitations but rarely dangerous. (heartrhythmclinic.com)

Cardiotoxicity studies evaluating conduction node exposure might define dose constraints and criteria for additional cardiac-sparing techniques, such as respiratory techniques or proton therapy, which could benefit patients with underlying rhythmic or conduction disorders. (allenpress.com)

some patients with an extreme case may experience cardiac arrest or lose consciousness. (aclsonline.us)

However, the contribution of ZO-1 to cardiac physiology remains poorly defined. (northwestern.edu)

Humans have a four-chambered heart consisting of the right and left atrium, and the right and left ventricle. (wikipedia.org)
The left atrium receives the oxygenated blood from the left and right pulmonary veins, which it pumps to the left ventricle (through the mitral valve (left atrioventricular valve) for pumping out through the aorta for systemic circulation. (wikipedia.org)
The red arrows show how oxygenated blood arrives at the left atrium, passes into the left ventricle, and is then pumped out of the heart into the aorta . (daviddarling.info)
This leads to a lessened chance of getting a conduction disease particularly that of the left ventricle. (hs770.com)
Coronary sinus, normally located between the LEFT ATRIUM and LEFT VENTRICLE on the posterior surface of the heart, can serve as an anatomical reference for cardiac procedures. (bvsalud.org)

The human heart has four chambers. (daviddarling.info)
For example, the cardiac chambers, the uterus, the regions of the gastrointestinal tract, and the arterial or venous vessels are all considered illustrative examples of body spaces within the intended meaning. (justia.com)
Top chambers of the heart that receive blood from the body and lungs. (heartrhythmclinic.com)
The two lower chambers of the heart. (heartrhythmclinic.com)
HN - 2008 BX - Lateral Sinus MH - Atrial Septum UI - D054087 MN - A07.541.459.249 MS - The thin membrane-like muscular structure separating the right and the left upper chambers (HEART ATRIA) of a heart. (bvsalud.org)

Implantable cardiac defibrillator. (heartrhythmclinic.com)

This muscle is so constructed that it is able to perform the 60 to 70 contractions which the healthy adult human heart undergoes every minute. (daviddarling.info)
Mitochondria are plentiful, providing energy for the contractions of the heart. (lumenlearning.com)

The right atrioventricular valve is the tricuspid valve . (daviddarling.info)

Cardiovascular effects: beta-blockers reduce heart rate, cardiac contractility, and systolic blood pressure. (escardio.org)
Heart Failure, to reduce the risk of cardiovascular mortality and heart failure hospitalizations in patients with heart failure. (nih.gov)
Cardiovascular magnetic resonance imaging (MRI) was performed five days after admission for further cardiac evaluation. (cmaj.ca)

Ventricular Conduction Tracts has an intrinsic rate of 15 - 40 beats per minute. (electricalvoice.com)

The net effect is an increase in intracellular calcium, which enhances cardiac contractility. (pharmacologymentor.com)
The heart rate during atrial fibrillation (AF) is highly dependent on the conduction properties of the atrioventricular (AV) node, which can be affected using β-blockers or calcium channel blockers, often chosen empirically. (lu.se)

Further branching eventually ends in the small nerve fibers spread through the heart muscle (Purkinje fibers). (nymetrodisability.com)

At the end of the assigned period between November 2010 and August 2015, the individuals from both groups were tested for their risk of getting left ventricular conduction disease by employing the multicenter Systolic Blood Pressure Intervention Trial (SPRINT) , and the results were analyzed. (hs770.com)

A wave of excitation spreads out from the sinoatrial node through the atria along specialized conduction channels. (wikipedia.org)
Cardiac action potential Action Potential Abrupt changes in the membrane potential that sweep along the cell membrane of excitable cells in response to excitation stimuli. (lecturio.com)

Journal of Heart Valve disease 20.3 (2011): 327. (structuralheart.abbott)
Andersen-Tawil syndrome (ATS) is a very rare orphan genetic multisystem channelopathy without structural heart disease (with rare exceptions). (bvsalud.org)
Effective for rapid termination of atrial fibrillation in patients with minimal structural heart disease . (pharmacologymentor.com)
For instance, according to the Centers for Disease Control and Prevention (CDC), it is estimated that 12.1 million individuals will have atrial fibrillation (AFib) by 2030 in the U.S. In addition, the CDC reported that approximately 6.2 million adults in the U.S. are suffering from heart failure. (taiwannews.com.tw)
Heart disease is the leading cause of death for men, women, and individuals of most racial and ethnic groups in the U.S. In addition, about 655,000 Americans die from heart disease every year, which is one in every four deaths. (taiwannews.com.tw)
Researchers have been working tirelessly to find the causes of different cardiac conditions which include cardiac conduction disease or CCD. (hs770.com)
What is cardiac conduction disease? (hs770.com)
In 2023, a recent study has been published which has enlisted elevated blood pressure as one of the prime causes of cardiac conduction disease. (hs770.com)
A study recently published in JAMA Cardiology has argued that people who have a long history of unmanaged and uncontrolled hypertension are at a higher risk of acquiring left ventricular conduction disease. (hs770.com)
The findings indicated are direct proportionality between blood pressure control and the risk of getting L.V. conduction disease. (hs770.com)
Along with the chest x-ray, the electrocardiograph (ECG) was a part of an evolution in the diagnosis of heart disease that began near the turn of the 20th century. (aedsuperstore.com)

Anatomy20

Organisms3

Diseases29

Chemicals and Drugs11

Analytical, Diagnostic and Therapeutic Techniques and Equipment22

Phenomena and Processes14

Disciplines and Occupations2

Health Care3

Arrhythmias17

Sinoatrial and atrioventricular nodes2

Bradycardia12

Pacemaker16

Impulses16

Myocardial10

Velocity3

Right atrium9

Ventricles31

Myocardium5

Nodal re-entry tachycardia1

Refractory3

System31

Tachycardia18

Rhythm23

Contraction7

Tissue6

Symptoms9

Defects1

Abnormality2

Dilated cardiomyopathy1

Abnormalities3

Congestive heart f2

Bundle8

Occurs6

Sudden8

Arrhythmia suppression trial2

Dysfunction2

Ventricular fibrillation2

Block34

Mitral and tricuspid1

Electrical impulse5

Pathway1

Rhythms3

Disorders1

Arrest1

Physiology1

Left ventricle5

Chambers5

Defibrillator1

Contractions2

Tricuspid valve1

Cardiovascular3

Tracts1

Calcium2

Purkinje1

Systolic1

Excitation2

Disease11