Right ventricular ventricular fibrillation. Medical search. Frequent questions

[ 4 ] Ventricular tachycardia (VT) may degenerate into VF. (medscape.com)
Patients who had cardiac arrest with ventricular fibrillation (or pulseless ventricular tachycardia) and who had not been resuscitated after receiving three or more precordial shocks were randomly assigned to receive 300 mg of intravenous amiodarone (246 patients) or placebo (258 patients). (nih.gov)
BACKGROUND: We describe implementation, evaluate performance, and report outcomes from the first program serving an entire metropolitan area designed to rapidly deliver extracorporeal membrane oxygenation (ECMO)-facilitated resuscitation to patients with refractory ventricular fibrillation/ventricular tachycardia (VF/VT) out-of-hospital cardiac arrest (OHCA). (healthpartners.com)
Brugada Syndrome Brugada syndrome is an inherited channelopathy causing an increased risk of ventricular tachycardia (VT) and ventricular fibrillation (VF) leading to syncope and sudden death. (msdmanuals.com)
when it does occur, ventricular fibrillation is usually a degeneration of other malignant arrhythmias, such as ventricular tachycardia (VT). (medscape.com)
The period of arrhythmia may not be extensive, but ventricular fibrillation that occurs without a few initial beats of ventricular tachycardia is unusual. (medscape.com)
In adults, ventricular fibrillation is preceded by ventricular tachycardia in approximately 80% of cases. (medscape.com)
In a population of patients with known ventricular arrhythmias, individuals who had ventricular fibrillation were more likely to have underlying significant heart disease (eg, cardiac tumors, long QT syndrome, structural congenital heart disease) than patients with ventricular tachycardia. (medscape.com)
Polymorphic ventricular tachycardia (eg, torsade de pointes) may be sustained or nonsustained, and morbidity is related to the duration of the arrhythmia and to the cardiac output. (medscape.com)
Arrhythmias are generally categorized as ventricular or supraventricular.1 Ventricular arrhythmias are a condition in which extra heartbeats originate from the lower chambers of the heart and can be classified as ventricular tachycardia, ventricular fibrillation, or premature ventricular contractions. (bartleby.com)
Introduction: Ventricular tachycardia (VT) is a potentially life-threatening cardiac arrhythmia characterized by rapid and abnormal electrical impulses originating in the ventricles. (madeformedical.com)
Ventricular tachycardia is rare but serious. (healthline.com)
Ventricular tachycardia can increase the risk of heart attacks. (healthline.com)
Ventricular tachycardia is defined as three or more consecutive ventricular premature beats. (health.am)
Ventricular tachycardia is either nonsustained (lasting less than 30 seconds) or sustained. (health.am)
Ventricular tachycardia is a frequent complication of acute myocardial infarction and dilated cardiomyopathy but may occur in chronic coronary disease, hypertrophic cardiomyopathy, mitral valve prolapse, myocarditis, and in most other forms of myocardial disease. (health.am)
In nonacute settings, most patients with ventricular tachycardia have known or easily detectable cardiac disease, and the finding of ventricular tachycardia is an unfavorable prognostic sign. (health.am)
Ventricular tachycardia episodes may be brief and last only a couple of seconds without causing harm. (mayoclinic.org)
Ventricular tachycardia (VT) is a rapid heartbeat that starts in the lower chambers of the heart (ventricles). (stlukes-stl.com)
This can lead to ventricular tachycardia. (stlukes-stl.com)
Ventricular tachycardia may not cause serious problems in people with otherwise healthy hearts. (mayoclinic.org)
In those with heart disease, ventricular tachycardia can be an emergency that needs immediate medical care. (mayoclinic.org)
Analysis showed sinus rhythm interrupted by 192 single ventricular premature complexes, a ventricular couplet, two incidents of ventricular bigeminy and two runs of ventricular tachycardia (VT). (ugent.be)
Phase distribution during ventricular tachycardia (VT) and ventricular fibrillation (VF) in an ischemic cardiomyopathy Tandutinib patient. (ap26113.com)
Stage sequences in ventricular fibrillation (VF) and ventricular tachycardia (VT). (ap26113.com)
Incidence of and outcomes associated with ventricular tachycardia or fibrillation in patients undergoing primary percutaneous coronary intervention. (wustl.edu)
CONTEXT: The incidence and timing of sustained ventricular tachycardia or fibrillation (VT/VF) and its impact on outcomes in patients with ST-elevation myocardial infarction (STEMI) undergoing primary percutaneous coronary intervention (PCI) are poorly understood. (wustl.edu)

Recently described syndromes such as the Brugada Syndrome may give clues to the underlying mechanism of ventricular arrhythmias. (wikipedia.org)
2017 AHA/ACC/HRS Guideline for management of patients with ventricular arrhythmias and the prevention of sudden cardiac death: a report of the American College of Cardiology/American Heart Association Task Force on clinical practice guidelines and the Heart Rhythm Society [published correction appears in J Am Coll Cardiol. (medlineplus.gov)
In patients with out-of-hospital cardiac arrest due to refractory ventricular arrhythmias, treatment with amiodarone resulted in a higher rate of survival to hospital admission. (nih.gov)
Predicting Malignant Ventricular Arrhythmias Using Real-Time Remote Monitoring. (harvard.edu)
Investigator-reported ventricular arrhythmias and mortality in heart failure with mildly reduced or preserved ejection fraction. (harvard.edu)
Ventricular arrhythmias after fibroma resection: Are patients still at risk? (harvard.edu)
Further theoretical concerns were highlighted by Shenasa and colleagues5 who studied patients undergoing electrophysiological studies for the investigation of both AF and ventricular arrhythmias. (bestbets.org)
However, technologic advances in both implantable and external automated defibrillators have made these devices an important part in the management of malignant ventricular arrhythmias. (medscape.com)
Some ventricular arrhythmias allow adequate cardiac ejection for a limited period, but once a rhythm degenerates to ventricular fibrillation, ejection is minimal. (medscape.com)
Supraventricular arrhythmias originate in the upper chambers of the heart and can be less serious than ventricular arrhythmias. (bartleby.com)
The class I and III agents are all effective in reducing ventricular premature beats but often cause side effects and may exacerbate serious arrhythmias in 5-20% of patients. (health.am)

Ventricular fibrillation (VF) is a severely abnormal heart rhythm ( arrhythmia ) that is life threatening. (medlineplus.gov)
Ventricular fibrillation (VF) is a life-threatening cardiac arrhythmia in which the coordinated contraction of the ventricular myocardium is replaced by high-frequency, disorganized excitation, resulting in [the effective] failure of the heart to pump blood. (medscape.com)
Ventricular fibrillation (VF) is a type of ventricular arrhythmia characterised by rapid, irregular, ineffective and uncoordinated ventricular activation with no mechanical effect. (easymbbs.com)
ABSTRACT: Implantable cardiac vagal nerve stimulators are a promising treatment for ventricular arrhythmia in patients with heart failure. (ox.ac.uk)
Atrial fibrillation (AF) is the most common form of cardiac arrhythmia. (nature.com)
Atrial fibrillation is the most common type of cardiac arrhythmia, and is responsible for substantial morbidity and mortality in the general population. (nature.com)
Atrial fibrillation is a supraventricular arrhythmia that adversely affects cardiac function and increases the risk of stroke. (aafp.org)
Because normal electrocardiographic findings do not rule out atrial fibrillation, home monitoring is recommended if there is clinical suspicion of arrhythmia despite normal test results. (aafp.org)
Atrial fibrillation is a supraventricular arrhythmia characterized by uncoordinated electrical activation of the atria and an irregular, often rapid, ventricular response causing hemodynamic compromise. (aafp.org)
Atrial fibrillation is associated with a fivefold increased risk of stroke, 3 - 5 and it is the most common arrhythmia. (aafp.org)

[ 5 ] the impulse can propagate erratically through the variably refractory myocardial cells and establish reentrant patterns that result in chaotic ventricular depolarization. (medscape.com)
Ventricular fibrillation may be initiated when an area of myocardium has refractory and conducting portions, and, as in any reentrant circuit, this combination promotes a self-sustaining rhythm. (medscape.com)
Question and Methods: A cluster-randomized open-label trial evaluating survival in adult patients with refractory ventricular fibrillation during OHCA treated by paramedics with standard. (emottawablog.com)
Atrial ventricular nodal ablation is recommended for patients refractory to medical therapy, usually older patients needing a pacemaker. (aafp.org)

It is also notable that ventricular fibrillation occurs where there is no discernible heart pathology or other evident cause, the so-called idiopathic ventricular fibrillation. (wikipedia.org)
citation needed] Idiopathic ventricular fibrillation occurs with a reputed incidence of approximately 1% of all cases of out-of-hospital arrest, as well as 3-9% of the cases of ventricular fibrillation unrelated to myocardial infarction, and 14% of all ventricular fibrillation resuscitations in patients under the age of 40. (wikipedia.org)
It follows then that, on the basis of the fact that ventricular fibrillation itself is common, idiopathic ventricular fibrillation accounts for an appreciable mortality. (wikipedia.org)
16 patients were investigated by electrography and radiofrequency ablation after resuscitation from recurrent idiopathic ventricular fibrillation. (nih.gov)
Idiopathic ventricular fibrillation Ventricular fibrillation causes uncoordinated quivering of the ventricle with no useful contractions. (msdmanuals.com)
If comprehensive electrocardiographic, imaging, and provocative testing do not identify any such causative disorder, the patient is considered to have idiopathic ventricular fibrillation. (msdmanuals.com)

Circulating linoleic acid at the time of myocardial infarction and risk of primary ventricular fibrillation. (harvard.edu)
Primary ventricular fibrillation is uncommon in children. (medscape.com)

For related topics, see Ventricular Fibrillation in Emergency Medicine , Sudden Cardiac Death , Hypertrophic Cardiomyopathy , and Pediatric Ventricular Fibrillation . (medscape.com)

Ventricular fibrillation is the main mechanism of sudden cardiac death, but the source of its spontaneous initiation has not been mapped. (nih.gov)
Hellemans, A. & Skotarek, M. & Mampaey, G. & Smets, P., (2023) "Electrocardiography-documented sudden cardiac death due to ventricular fibrillation in a young cat without echocardiographic evidence of severe structural heart disease", Vlaams Diergeneeskundig Tijdschrift 92(4), 177-184. (ugent.be)

The outcome in patients with ventricular fibrillation is better than in patients with asystole or pulseless electrical activity (PEA), and outcome may be further improved by prompt recognition and treatment of ventricular fibrillation. (medscape.com)

6 - 8 The prevalence of atrial fibrillation increases with age, and the associated cost of medical care is high. (aafp.org)
Overall, the prevalence of atrial fibrillation was unchanged after closure. (lu.se)

The ventricular muscle twitches randomly rather than contracting in a coordinated fashion (from the apex of the heart to the outflow of the ventricles), and so the ventricles fail to pump blood around the body - because of this, it is classified as a cardiac arrest rhythm, and patients in V-fib should be treated with cardiopulmonary resuscitation (CPR) and prompt defibrillation. (wikipedia.org)
The short-term prognosis of a patient with ventricular fibrillation is primarily dictated by time to defibrillation, and long-term issues are modulated by any underlying conditions that may have led to the ventricular fibrillation event. (medscape.com)
One study demonstrated a good outcome in 17% of patients presenting with cardiac arrest and ventricular fibrillation, all of whom had early defibrillation. (medscape.com)
Activation during ventricular defibrillation in open-chest dogs. (bvsalud.org)

Left untreated, ventricular fibrillation is rapidly fatal as the vital organs of the body, including the heart, are starved of oxygen, and as a result patients in this rhythm will not be conscious or responsive to stimuli. (wikipedia.org)
Coronary artery disease (CAD) is the single most common etiologic factor predisposing patients to ventricular fibrillation (VF). (medscape.com)
Triggers of ventricular fibrillation originated from various locations within the Purkinje system in 12 patients and from the ordinary myocardial muscle in four. (nih.gov)
The accuracy of mapping was confirmed by acute elimination of triggers by radiofrequency delivery, and there was no recurrence of ventricular fibrillation in 14 patients. (nih.gov)
PATIENTS--16 patients undergoing cardioversion of atrial fibrillation in whom sinus rhythm had persisted for 24 hours or more. (bmj.com)
BestBets: Which is the best calcium channel blocker for controlling the ventricular rate in patients with atrial fibrillation? (bestbets.org)
After initial resuscitation, therapy in patients with ventricular fibrillation is primarily focused on preventing the antecedent ventricular tachycardias. (medscape.com)
In studies of pediatric cardiac arrests, ventricular fibrillation was the first identified rhythm in 6-19% of patients, with asystole or PEA as the most frequent rhythm identified first. (medscape.com)
[ 7 , 8 ] Overall incidence is likely to be higher because cardiac rhythms frequently change during an arrest, and ventricular fibrillation may have preceded asystole in some patients. (medscape.com)
Surgical treatments for atrial fibrillation are reserved for patients who are undergoing cardiac surgery for other reasons. (aafp.org)
Ablation therapy may be superior to antiarrhythmics in selected patients, including those with paroxysmal atrial fibrillation who are symptomatic but without structural heart disease, patients who are intolerant of antiarrhythmics, and patients with inadequate pharmacologic rhythm control. (aafp.org)
Amiodarone and ventricular fibrillation amplitude of spectral area in patients with out-of-hospital cardiac arrest. (escardio.org)
NYHA deteriorated in 9 patients, despite reduced right ventricular size. (lu.se)
However, a subset of patients do not improve, in which we suggest that concealed left ventricular dysfunction may play a causative role. (lu.se)

Hypertrophic Cardiomyopathy Hypertrophic cardiomyopathy is a congenital or acquired disorder characterized by marked ventricular hypertrophy with diastolic dysfunction (eg, due to valvular aortic stenosis, coarctation. (msdmanuals.com)

Ventricular premature beats are characterized by wide QRS complexes that differ in morphology from the patient's normal beats. (health.am)
Ambulatory electrocardiographic monitoring or monitoring during graded exercise may reveal more frequent and complex ventricular premature beats than occur in a single routine ECG. (health.am)
An increased frequency of ventricular premature beats during exercise is associated with a higher risk of cardiovascular mortality, though there is no evidence that specific therapy has a role. (health.am)
Sudden death occurs more frequently (presumably as a result of ventricular fibrillation ) when ventricular premature beats occur in the presence of organic heart disease but not in individuals with no known cardiac disease. (health.am)
Jouven X et al: Long-term outcome in asymptomatic men with exercise-induced premature ventricular depolarizations. (health.am)

In most cases, it is the muscle in the wall of the left ventricle that thickens, but sometimes the right ventricular wall is also affected. (news-medical.net)
0.001) and right ventricular systolic pressure dropped significantly. (lu.se)
Improvement of NYHA class was associated with reduced right ventricular systolic pressure but not with remodelling of the right heart. (lu.se)

If the underlying condition is mitral prolapse, hypertrophic cardiomyopathy, left ventricular hypertrophy, or coronary disease - or if the QT interval is prolonged - ß-blocker therapy is appropriate. (health.am)

The relevance of this is that theories of the underlying pathophysiology and electrophysiology must account for the occurrence of fibrillation in the apparent "healthy" heart. (wikipedia.org)
OBJECTIVE--Previous studies on atrial recovery after cardioversion of atrial fibrillation have not taken into account new knowledge about the pathophysiology of transmitral and transtricuspid flow velocity patterns. (bmj.com)

Apart from localized concentric left ventricular septal hypertrophy, echocardiography was normal. (ugent.be)

Ventricular fibrillation most commonly occurs within diseased hearts, and, in the vast majority of cases, is a manifestation of underlying ischemic heart disease. (wikipedia.org)
Ventricular fibrillation (VF) occurs in a variety of clinical situations but is most often associated with coronary artery disease (CAD). (medscape.com)

Ventricular fibrillation (V-fib or VF) is an abnormal heart rhythm in which the ventricles of the heart quiver. (wikipedia.org)
citation needed] Ventricular fibrillation has been described as "chaotic asynchronous fractionated activity of the heart" (Moe et al. (wikipedia.org)
Ventricular fibrillation is also seen in those with cardiomyopathy, myocarditis, and other heart pathologies. (wikipedia.org)
(noun) fibrillation of heart muscles resulting in interference with rhythmic contractions of the ventricles and possibly leading to cardiac arrest. (wordinn.com)
failure of the ventricles of the heart to contract (usually caused by ventricular fibrillation) with consequent absence of the heart beat leading to oxygen lack and eventually to death. (wordinn.com)
an electronic device that administers an electric shock of preset voltage to the heart through the chest wall in an attempt to restore the normal rhythm of the heart during ventricular fibrillation. (wordinn.com)
treatment by stopping fibrillation of heart muscles (usually by electric shock delivered by a defibrillator). (wordinn.com)
This is cardioplegic ventricular fibrillation, occurring as the heart is stopped during cardiopulmonary bypass for open heart surgery. (ecgguru.com)
Using a Langendorff perfused rat heart, we show that the acetylcholine analogue carbamylcholine raises ventricular fibrillation threshold (VFT) and flattens the electrical restitution curve. (ox.ac.uk)
A technician was called to read the data off my ICD and it was concluded that Atrial Fibrillation (AF) was the cause of my 50 shocks and that my device had shocked me inappropriately as when you heart is beating fast enough the device can get tricked between VT and AF. (hearts4heart.org.au)
BACKGROUND: The mechanisms that sustain ventricular fibrillation (VF) in the human heart remain unclear. (ox.ac.uk)
Prevention of atrial fibrillation: report from a National Heart, Lung, and Blood Institute workshop. (nature.com)
Most people who have ventricular fibrillation have an underlying heart disease or have experienced serious trauma, such as being struck by lightning. (mayoclinic.org)
Mayo Clinic electrophysiologist Fred Kusumoto, M.D., explains what happens in the heart to create atrial fibrillation and what can be done to fix it. (mayoclinic.org)
HEART BEATING] Atrial fibrillation interrupts this regular beat. (mayoclinic.org)
Dr. Kusumoto says atrial fibrillation decreases the heart's blood pumping efficiency and puts a patient at higher risk for blood clots, heart failure, and stroke. (mayoclinic.org)
In some cases, atrial fibrillation can be corrected with medication or by administering a shock to a sedated patient's heart. (mayoclinic.org)
When blood flow from the heart is not significantly restricted, the ventricular thickening can still decrease the chamber's capacity to hold blood and therefore its ability to pump blood around the body. (news-medical.net)
The disordered arrangement of the heart cells and the thickened ventricular wall may interfere with the heart's electrical signaling system, which can cause the organ to beat rapidly or irregularly. (news-medical.net)
Most people with ventricular fibrillation have an underlying heart disease or had a serious injury. (mayoclinic.org)
A beta blocker or nondihydropyridine calcium channel blocker should be used to control heart rate in atrial fibrillation. (aafp.org)
In this case report, it is shown that VF due to ventricular ectopy is a possible cause of SCD even in asymptomatic cats with only mild echocardiographic signs of structural heart disease. (ugent.be)

ATP1A3-Encoded Sodium-Potassium ATPase Subunit Alpha 3 D801N Variant Is Associated With Shortened QT Interval and Predisposition to Ventricular Fibrillation Preceded by Bradycardia. (harvard.edu)

El objetivo del estudio es comparar las características espectrales de la señal eléctrica de la FV sostenida y no sostenida en pacientes portadores de desfibrilador implantable. (revespcardiol.org)

Ventricular fibrillation can occur at currents of 50-100 mA. (medscape.com)

In atrial fibrillation, instead of the atria squeezing in a normal regular fashion, the atria beat irregularly and chaotically. (mayoclinic.org)

Predictive value of global longitudinal strain by left ventricular ejection fraction. (harvard.edu)
What Is a Normal Left Ventricular Ejection Fraction? (medscape.com)

In a study of pediatric out-of-hospital arrests, ventricular fibrillation was the initial recorded rhythm in 19% of cardiac arrests. (medscape.com)
Thus, ventricular fibrillation as a terminal rhythm in cardiac arrest may result from various causes. (medscape.com)
The initial rhythm is ventricular fibrillation. (emottawablog.com)

Scholars@Duke publication: Ventricular fibrillation threshold for AC shocks of long duration, in dogs with normal acid-base state. (duke.edu)
Evidence of complete cessation and regeneration of ventricular fibrillation after unsuccessful shocks. (bvsalud.org)

Such asynchronous ventricular quivering or fibrillation prevents any effective cardiac output and results in unconsciousness (SYNCOPE). (harvard.edu)

arrest, respiratory arrest, or ventricular fibrillation without showing the etiology. (cdc.gov)
Harmful effects of exposures to electric shock would include respiratory arrest, ventricular fibrillation, and burns. (cdc.gov)

Frolkis JP et al: Frequent ventricular ectopy after exercise as a predictor of death. (health.am)
However, ventricular ectopy was observed on electrocardiography (ECG) during echocardiography. (ugent.be)

Ventricular fibrillation (VF) continues to be proposed to become taken care of by localized high-frequency sources. (ap26113.com)

The mechanisms responsible for the maintenance and termination of ventricular fibrillation (VF) are poorly understood. (revespcardiol.org)
Evidence for multiple mechanisms in human ventricular fibrillation. (ox.ac.uk)
The aim of this study was to map electrical activity from the entire ventricular epicardium of human hearts to establish the relative roles of these mechanisms in sustaining early human VF. (ox.ac.uk)

Atrial flutter and atrial fibrillation may increase the likelihood of a blood clot. (healthline.com)
People who have atrial flutter also often have atrial fibrillation at other times. (mayoclinic.org)

Micro-reentry and enhanced automaticity in one or more atrial circuits are the most common triggers for atrial fibrillation. (aafp.org)

Ventricular fibrillation results in cardiac arrest with loss of consciousness and no pulse. (wikipedia.org)
Ventricular fibrillation is initially found in about 10% of people with cardiac arrest. (wikipedia.org)
Ventricular fibrillation is a cause of cardiac arrest. (wikipedia.org)
Ventricular fibrillation is much less common among infants and children, in whom asystole is the more common presentation of cardiac arrest. (msdmanuals.com)
The last run of VT deteriorated into ventricular fibrillation (VF) and ultimately cardiac arrest. (ugent.be)

Surface ECG demonstrates no identifiable QRS complexes, although a wide range of amplitude of electrical activity is present, from sine-wave ventricular flutter to fine ventricular fibrillation, which may be difficult to distinguish from asystole (see image below). (medscape.com)

Atrial and ventricular function after cardioversion of atrial fibrillation. (bmj.com)
CONCLUSIONS--This study indicates that, in addition to the previously known electromechanical dissociation of atrial recovery that exists after cardioversion of atrial fibrillation, there may also be a transient deterioration of ventricular function modulating the transvalvar inflow velocity recordings. (bmj.com)

Without prompt and aggressive therapy, sustained ventricular fibrillation is uniformly lethal. (medscape.com)
Ablation therapy is used to destroy abnormal foci responsible for atrial fibrillation. (aafp.org)

Pulse rate is sensitive, but not specific, for diagnosis, and suspected atrial fibrillation should be confirmed with 12-lead electrocardiography. (aafp.org)

Ventricular fibrillation (VF) is due to multiple wavelet reentrant electrical activity and is manifested on electrocardiogram (ECG) by ultrarapid baseline undulations that are irregular in timing and morphology. (msdmanuals.com)
Ventricular fibrillation with polymorphic morphology and cycle lengths varying from 80-280 milliseconds. (medscape.com)

Anatomy22

Organisms5

Diseases58

Chemicals and Drugs35

Analytical, Diagnostic and Therapeutic Techniques and Equipment63

Psychiatry and Psychology1

Phenomena and Processes21

Disciplines and Occupations3

Anthropology, Education, Sociology and Social Phenomena1

Technology, Industry, Agriculture2

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Named Groups1

Health Care26

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Tachycardia27

Arrhythmias11

Arrhythmia10

Refractory4

Idiopathic6

Primary ventricular fibrillation2

Pediatric Ventricular Fibrillation1

Sudden cardi2

Pulseless1

Prevalence of atrial fibrillation2

Defibrillation4

Patients14

Dysfunction1

Premature5

Right ventricular3

Hypertrophic Cardiomyopathy1

Pathophysiology2

Hypertrophy1

Occurs2

Heart22

Bradycardia1

Implantable1

Occur1

Atria1

Left ventricu2

Rhythm3

Shocks2

Syncope1

Respiratory2

Ectopy2

Frequency1

Mechanisms3

Atrial Flutter2

Triggers1

Arrest5

Amplitude1

Cardioversion2

Therapy2

Electrocardiography1

Morphology2