Ventricular arrhythmia and sudden cardiac. Medical search. Frequent questions

Chaotic rhythms (eg, ventricular fibrillation) are also examples of reentry mechanisms. (medscape.com)
Ventricular tachycardia may result in ventricular fibrillation (VF) and turn into cardiac arrest. (wikipedia.org)
The term ventricular arrhythmia refers to the group of abnormal cardiac rhythms originating from the ventricle, which includes ventricular tachycardia, ventricular fibrillation, and torsades de pointes. (wikipedia.org)
This can lead to heart failure, atrial fibrillation, and sudden death due to ventricular arrhythmias. (cdc.gov)
This software is capable of simulating sinus rhythm, episodes of atrial fibrillation and atrial premature beats in ECGs and PPGs as well as extreme bradycardia and ventricular tachycardia in PPGs. (physionet.org)
The majority of arrhythmias are associated with ventricular fibrillation. (sru.edu)
Ventricular fibrillation is a condition where the heart's electrical impulses become irregular, resulting in blood no longer being pumped efficiently throughout the body. (sru.edu)
Two main causes of sudden cardiac death are severe ventricular fibrillation or terminal cardiac arrhythmia. (lifehack.org)
Ventricular fibrillation occurs when, instead of pumping blood to the rest of your body, some of the chambers in your heart just quiver. (lifehack.org)
The majority of these suffer from atrial fibrillation, a chronic arrhythmia most often observed in the aging population. (sciencedaily.com)
Arrhythmias can increase the risk of sudden cardiac arrest and Atrial fibrillation (AFIb) and can cause strokes. (earth.com)
Ventricular fibrillation. (mayoclinic.org)
Most people with ventricular fibrillation have an underlying heart disease or had a serious injury. (mayoclinic.org)
Almost all of these deaths are related to ventricular fibrillation . (britannica.com)
However, the primary danger of ventricular tachycardia is that it will decay into ventricular fibrillation, which is incapable of sustaining life and represents the majority of sudden cardiac death cases. (britannica.com)
Thus, the indication that ventricular tachycardia or ventricular fibrillation might occur demands prompt therapeutic intervention. (britannica.com)
[ 1 ] That observation is consistent with already known facts that the main initiating mechanisms of sudden cardiac death are ventricular tachycardia and ventricular fibrillation, and that time to defibrillation is a critical factor in restoring the rhythm. (medscape.com)
Examples are ventricular tachycardia and ventricular fibrillation. (medlineplus.gov)
Ventricular Fibrillation (VF) Ventricular fibrillation causes uncoordinated quivering of the ventricle with no useful contractions. (msdmanuals.com)

It is found initially in about 7% of people in cardiac arrest. (wikipedia.org)
In those in cardiac arrest due to ventricular tachycardia, cardiopulmonary resuscitation (CPR) and defibrillation is recommended. (wikipedia.org)
High-dose magnesium is often used as an antidote in cardiac arrest protocols. (wikipedia.org)
Although rare, a sports-related sudden cardiac arrest (SrSCA) and/or sudden cardiac death (SCD) in an athlete is a devastating, heartbreaking event with significant emotional and societal impact. (acc.org)
The ACC, along with 26 other organizations, has joined The Smart Heart Sports Coalition, a collaboration convened by the National Football League (NFL) to encourage the adoption of health policies that will prevent death from sudden cardiac arrest among high school students through increased CPR education, AED access and emergency action plan requirements. (acc.org)
Clinical cases include cardiac arrest in a softball player following a collision, swimming-induced pulmonary edema, acute deep vein thrombosis in a cyclist with iliac vein compression from psoas muscle hypertrophy, and more. (acc.org)
Ventricular tachycardia is a fast, abnormal heart rate and may lead to sudden cardiac arrest if not treated successfully. (varian.com)
Cardiac arrest and cardiopulmonary resuscitation 2. (muni.cz)
Automated External Defibrillators (AEDs) are excellent, potentially life-saving tools that are intended to address individuals experiencing sudden cardiac arrest. (sru.edu)
Abnormal heart arrhythmias can lead to sudden cardiac arrest. (sru.edu)
Herein, we present a case of a 69 year old male who suffered a cardiac arrest four days after hospital discharge following an acute myocardial infarction. (academicjournals.org)
The American Heart Association estimates that approximately 350,000 people in the United States experience a cardiac arrest while outside of the hospital. (firerescue1.com)
One component of the cardiac chain of survival , bystander CPR, appears to play a major role in the increase of survival to discharge rates in cardiac arrest. (firerescue1.com)
Numerous studies have shown the faster the response to someone who is in sudden cardiac arrest, the better their chances for survival. (firerescue1.com)
The phrase "chain of survival" was coined to describe a series of events that if strung together and performed in a timely manner, would greatly improve the chances of survival from sudden cardiac arrest in the out of hospital setting [2]. (firerescue1.com)
It has been known that early CPR by members of the public, performed before the arrival of trained responders, improved sudden cardiac arrest survival rates. (firerescue1.com)
Rates of only 30 to 40 percent of sudden cardiac arrest receiving bystander CPR have been reported [4]. (firerescue1.com)
A recent conversation with AEDSuperstore gleaned a sample step toward solving the issue of bystander CPR avoidance, "Knowing how to recognize sudden cardiac arrest - its signs and symptoms - along with more public awareness on how simple and critical hands-only CPR can be, could lead to more involvement. (firerescue1.com)
Regardless of the cause, it is essential to increase the percentage of sudden cardiac arrest patients who receive prearrival CPR, as a cost effective and efficacious method to improve survival to discharge rates. (firerescue1.com)
studies comparing compressions only CPR versus "standard CPR" by nonprofessional bystanders showed a higher survival rate for sudden cardiac arrest patients who received compression only CPR [4]. (firerescue1.com)
Rates of myocardial infarction and stroke were also nearly identical, as were rates of sudden cardiac arrest and ventricular arrhythmia. (medpagetoday.com)
If CPVT is not recognized and treated, an episode of ventricular tachycardia may cause the heart to stop beating (cardiac arrest), leading to sudden death. (medlineplus.gov)
However, researchers from the Royal Melbourne Hospital and Alfred Hospital in Melbourne, Australia have found that coffee and tea don't increase the risk of cardiac arrest and actually decrease the frequency of arrhythmias in some people. (earth.com)
Advanced cardiac life support (ACLS): In the event of cardiac arrest, the immediate implementation of ACLS guidelines is indicated. (medscape.com)
The 2009 American Heart Association Cardiac Arrest Survival Summit released consensus recommendations for implementation strategies to optimize the care of patients with out-of-hospital sudden cardiac arrest (OHCA). (medscape.com)
The conclusion that may be drawn from the above studies is that immediate chest compression and defibrillation are the most important interventions to improve the outcome in sudden cardiac arrest, whereas ventilation does not play as important a role. (medscape.com)
This intervention limits neurologic injury associated with brain ischemia during a cardiac arrest and reperfusion injury associated with resuscitation. (medscape.com)
The MTWA technology has shown promise in a number of studies by predicting increased patient risk to develop life threatening ventricular arrhythmias or sudden cardiac arrest. (medgadget.com)
An external defibrillator is used to treat abnormal heart rhythms ( arrhythmia ) that cause collapse and cardiac arrest. (medlineplus.gov)
They may have their onset at any time from childhood to middle age, and they can vary in severity from mild chest discomfort or palpitations with or without syncope to severe cardiopulmonary compromise and cardiac arrest. (medscape.com)
Fire fighter suffers cardiac arrest at structure fire - Illinois. (cdc.gov)
This list includes some preventive measures that have been recommended by other agencies to reduce the risk of on-the- job heart attacks and sudden cardiac arrest among fire fighters. (cdc.gov)
The causes of cardiac arrest are extremely heterogeneous. (bvsalud.org)
Among these, both hypokalemia and hypocalcemia are known reversible factors that can lead to cardiac arrest. (bvsalud.org)
In this report, we present a unique case report of a patient with previously undiagnosed coeliac disease who experienced cardiac arrest due a combination of hypokalemia and hypocalcemia resulting from malabsorption. (bvsalud.org)
Despite initial treatment, the patient experienced sudden cardiac arrest. (bvsalud.org)
However, recurrent episodes of ventricular arrhythmias and cardiac arrest occurred. (bvsalud.org)
This case is noteworthy for its uniqueness, as there are no documented instances in the scientific literature linking cardiac arrest directly to coeliac disease. (bvsalud.org)
It is important to emphasize the need for investigating potential reversible causes of cardiac arrest, such as hypokalemia and hypocalcemia, and implementing appropriate interventions to address these factors. (bvsalud.org)
Sudden cardiac arrest and its most common consequence, SCD, are "major public-health problems," accounting for approximately 50% of all cardiovascular deaths, with at least 25% being first symptomatic cardiac event. (medscape.com)
It also advises that in patients with an ICD and a history of cardiac arrest or sustained VAs in whom removal of the ICD is required (as with infection), the wearable cardioverter-defibrillator (WCD) is reasonable for the prevention of SCD. (medscape.com)

Congenital problems include long QT syndrome and catecholaminergic polymorphic ventricular tachycardia. (wikipedia.org)

Isolated premature ventricular contractions (PVCs) are reasonably common. (medscape.com)
In contrast, premature ventricular contractions can occur spontaneously in healthy people without any consequence. (britannica.com)
The efficacy of these drugs was assessed based on their ability to control the frequency of premature ventricular contractions and other transient ventricular arrhythmias. (britannica.com)

Other rarer congenital causes of monomorphic VT include right ventricular dysplasia, and right and left ventricular outflow tract VT. (wikipedia.org)
We aimed to identify right ventricular (RV) electrophysiological parameters potentially associated with a higher risk of ventricular arrhythmias in patients with rTOF. (revespcardiol.org)
3,4 On CMR, CS can be identified by late gadolinium enhancement (LGE) in a sub-epicardial or mid-wall pattern, which is often multifocal, involving septal segments and/or right ventricular free wall, 5 with or without evidence of acute edema and or left ventricular segmental dysfunction (Figure 2, 3). (asnc.org)
CMR is considered the gold standard for assessing chamber volumes and LV and right ventricular (RV) ejection fraction. (medscape.com)
Defining the role of the ICD in patients with hypertrophic cardiomyopathy, arrhythmogenic right ventricular cardiomyopathy , cardiac sarcoidosis , and inherited cardiac channelopathies in prospective studies (preferably randomized controlled trials). (medscape.com)
Even so, the dispute considering Brugada syndrome as an independent entity or forming part of the spectrum of arrhythmogenic right ventricular cardiomyopathy is still controversial. (bvsalud.org)

Individuals with PKP2-ACM have been known to experience life-threatening ventricular arrhythmias, cardiac structural abnormalities, and sudden cardiac death. (empr.com)
According to Rocket Pharmaceuticals, the study will assess the impact of the gene therapy on PKP2 myocardial protein expression, cardiac biomarkers, clinical predictors of life-threatening ventricular arrhythmias, and sudden cardiac death. (empr.com)

Ventricular arrhythmia (VA) may be an isolated and completely benign finding in children, a marker of serious systemic disease or myopathy, or a mechanism for syncope and sudden cardiac death (SCD). (medscape.com)
Hypertrophic cardiomyopathy (HCM) is the most common inherited cardiac condition, with an associated increased risk of ventricular arrhythmias and sudden cardiac death. (centenary.org.au)
Cooper, LT 2020, ' Ventricular Arrhythmias and Sudden Cardiac Death in Lymphocytic Myocarditis ', Journal of the American College of Cardiology , vol. 75, no. 9, pp. 1058-1060. (elsevierpure.com)
Preventing ventricular arrhythmias and sudden cardiac death in adults with repaired tetralogy of Fallot: a never-ending story? (revespcardiol.org)
and Erica Spatz, MD, for Real-World Shared Decision Making Conversations: Sudden Cardiac Death in HCM in Stop 5: HCM Shared Decision Making: Conversations That Count. (acc.org)
Join Matthew W. Martinez, MD, FACC, Michael J. Ackerman, MD, PhD, FACC, and Erica Spatz, MD, for Real-World Shared Decision Making Conversations: Sudden Cardiac Death in HCM in Stop 5: HCM Shared Decision Making: Conversations That Count. (acc.org)
Chagas cardiomyopathy patients can seek treatment for malignant ventricular arrhythmias, aneurysms, thromboembolism, or sudden cardiac death ( 2 ). (cdc.gov)
competitive sport activity enhances by 2.5 the risk of sudden death in adolescents and young athletes (1). (escardio.org)
The family history of cardiovascular diseases is considered positive in athletes when close relatives had experienced a premature heart attack or sudden death (below 55 years of age in males and 65 years in females), or suffered from cardiomyopathy, Marfan syndrome, long QT syndrome, Brugada syndrome, severe arrhythmias, coronary artery disease, or other disabling cardiovascular diseases. (escardio.org)
How well do you know the 2022 ESC Guidelines for the management of patients with ventricular arrhythmias and the prevention of sudden cardiac death? (escardio.org)
[11] Studies show that the risk of sudden cardiac death due to either of these causes decrease with increased levels of Omega-3s. (lifehack.org)
In 2002 in its scientific statement on fish consumption, fish oil, omega-3 fatty acids, and cardiovascular disease, The American Heart Association announced that "randomized controlled trials have demonstrated that omega-3 fatty acid supplements can reduce cardiac death, nonfatal MI, nonfatal stroke, and atherosclerosis in coronary patients. (uspharmacist.com)
Sudden cardiac death is often precipitated by unstable ventricular arrhythmias. (academicjournals.org)
Ventricular arrhythmias account for the large majority of the 300,000 cases of sudden cardiac death annually in the United States. (sciencedaily.com)
This makes death by cardiac disease one of the top killers in the United States [1]. (firerescue1.com)
Researchers suspect that CPVT may be a significant cause of sudden death in children and young adults without recognized heart abnormalities. (medlineplus.gov)
Sudden cardiac death (SCD) is most commonly secondary to sustained ventricular arrhythmias (VAs). (whiterose.ac.uk)
5 Further, beta-blockers reduce infarct size in patients with acute MI and decrease the risk of sudden death due to ventricular arrhythmias. (cms.gov)
An article by Hjalmarson (1997) claims that there is no other therapy that has such a well-documented effect on sudden cardiac death. (cms.gov)
Cardiac involvement is common, and often presents with non-specific symptoms but can be potentially lethal due to increased risk of sudden cardiac death. (asnc.org)
LGE burden on CMR can also help identify CS patients without severe decline in ejection fraction where ICD placement is recommended for primary prevention of sudden cardiac death. (asnc.org)
Ventricular arrhythmias represent the major mechanism of cardiac sudden death , which is the leading cause of death in the United States , where each year more than 325,000 people die suddenly. (britannica.com)
In patients with moderate to severe congestive heart failure , cardiac arrhythmias are the most common cause of death. (britannica.com)
However, even though these drugs may reduce premature contractions, they are not effective in reducing sudden cardiac death. (britannica.com)
Patient may be asymptomatic or present with ventricular arrhythmias, thromboembolism, heart failure and sudden cardiac death. (banglajol.info)
SCD indicates sudden cardiac death. (revespcardiol.org)
2017 AHA/ACC/HRS guideline for management of patients with ventricular arrhythmias and the prevention of sudden cardiac death. (bmj.com)
2022 ESC Guidelines for the management of patients with ventricular arrhythmias and the prevention of sudden cardiac death. (bmj.com)
Through these measures, the greatest public health benefits can be achieved in the fight against sudden death. (medscape.com)
It is most often used in people who are at risk for sudden death because their heart function is so poor, or they have had dangerous heart rhythms before. (medlineplus.gov)
These clinical features may help further risk stratify TOF patients requiring therapies to prevent sudden death. (lu.se)
The autopsy, conducted by the County Coroner, listed "Cardiac Arrhythmia" as the cause of death. (cdc.gov)
The death certificate, also completed by the County Coroner, listed "Cardiac arrhythmia " due to "cardiomegaly, left ventricular hypertrophy, and ischemic heart disease" as the immediate cause of death. (cdc.gov)
Patients are predisposed to atrial and/or ventricular tachyarrhythmias and sudden cardiac death, particularly during increased adrenergic activity. (msdmanuals.com)
It provides up-to-date evidence-based recommendations on the treatment of ventricular arrhythmias and prevention of sudden cardiac death. (medscape.com)
With this guideline, said Al-Khatib, clinicians will "know when to suspect that a patient is at an increased risk of sudden cardiac death and to know how to evaluate such a patient and how to treat him or her. (medscape.com)
We confirm that Brugada syndrome is the same entity as sudden night death, highly prevalent in Southeast Asian countries (Thailand, Philippines and Japan), both of which share mutations in the same gene: SCN5A. (bvsalud.org)
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)

We used logistic regression modeling to identify those variables associated with an increased risk of clinical or induced ventricular tachycardia (VT), or clinical VT exclusively. (revespcardiol.org)

In many cases, hypertrophic cardiomyopathy is caused by a mutation in one of the genes that make up the cardiac sarcomere, and only a single copy of a defective gene is needed for the disorder to develop (autosomal dominant inheritance). (cdc.gov)
Hypertrophic cardiomyopathy (HCM) is the most common heritable cardiovascular disorder and is characterized by left ventricular hypertrophy (LVH), which is unexplained by abnormal loading conditions. (mdpi.com)
The comprehensive guideline replaces the 2006 guideline and supersedes some sections of the ACC/AHA/HRS 2008 guidelines for device-based therapy of cardiac rhythm abnormalities-specifically those sections on indications for the implantable cardioverter-defibrillator ( ICD )-and it updates the SCD prevention recommendations in the 2011 ACCF/AHA guideline for the diagnosis and treatment of hypertrophic cardiomyopathy , the guideline writers note. (medscape.com)

Pediatric patients with surgical ventricular scars, such as those with postoperative ventricular tachycardia (VT) after repair of tetralogy of Fallot , are commonly cited examples of this mechanism. (medscape.com)
Risk stratification of ventricular arrhythmias in patients with repaired tetralogy of Fallot (rTOF) remains unresolved. (revespcardiol.org)
PALO ALTO, Calif., May 26, 2021 /PRNewswire/ -- Varian, a Siemens Healthineers company, announced today that the U.S. Food and Drug Administration (FDA) has granted the company Breakthrough Device Designation for its cardiac radioablation (CRA) system, currently in development as a noninvasive therapy for select patients with refractory ventricular tachycardia (VT). (varian.com)
Early positive clinical results suggest that non-invasive cardiac radioablation could offer new hope for patients with refractory VT,' said Kolleen Kennedy, President, Proton Solutions and Growth Office, Varian. (varian.com)
To investigate possible cardiac manifestations of Chagas disease, we tested 97 Latinx patients with nonischemic cardiomyopathy in Houston, Texas, USA, for Trypanosoma cruzi infection. (cdc.gov)
Latinx cardiac patients in the United States would benefit from laboratory screening for T. cruzi infection. (cdc.gov)
The clinical manifestations of Chagas disease, caused by infection with the Trypanosoma cruzi parasite, are cardiac in approximately one third of patients. (cdc.gov)
Despite advances in our understanding of the pathogenic pathways, why some patients have onset of progressive cardiac disease whereas others remain in a persistent subclinical indeterminate disease remain unknown. (cdc.gov)
During August 2015-July 2017, we recruited cardiac patients for Chagas disease surveillance from Harris Health System-Ben Taub Hospital, a large county-funded tertiary care facility in Houston. (cdc.gov)
Patients with known nonischemic cardiomyopathy who sought treatment at the outpatient cardiac clinic or who were admitted to a cardiac inpatient unit were invited to participate in our study. (cdc.gov)
Many patients with depressed left ventricular function receive an implantable cardioverter-defibrillator for prophylaxis against these lethal arrhythmias. (academicjournals.org)
The wearable cardioverter-defibrillator (WCD) can protect these vulnerable patients in the short term when arrhythmia risk is highest. (academicjournals.org)
Additionally, it is the authors' suggestion that assessment of the thyroid status of patients with KCNE2- and KCNQ1-linked cardiac arrhythmias could in some cases reveal a potential endocrine component to their cardiac arrhythmias that may not have been previously determined. (sciencedaily.com)
Patients with atrial or ventricular arrhythmias are often advised against having caffeine. (earth.com)
Beta-blockers are a beneficial treatment for post MI patients because they decrease the incidence of recurrent cardiac events by blunting the effects of adrenaline in the body. (cms.gov)
In patients with implantable cardiac devices, CMR is often contraindicated due to concern for damaging the device. (asnc.org)
If performed well, it provides diagnostic quality images in patients with implantable cardiac devices or severe renal dysfunction, and also allows whole body imaging which can help identify foci of extra-cardiac sarcoidosis. (asnc.org)
Patients with coronary artery disease often undergo an exercise test that examines ventricular rhythm under circumstances in which part of the heart is receiving insufficient blood. (britannica.com)
This is a useful way of predicting potential problems associated with ventricular arrhythmias in these patients. (britannica.com)
Treatment of ventricular arrhythmias in patients without coexisting cardiac disease is variable and, in some cases, is not required. (britannica.com)
Left ventricular ejection fraction (LVEF) of the patients in the registry (primary implants and total implants). (revespcardiol.org)
Clinical arrhythmia of the patients in the registry (primary implants and total implants). (revespcardiol.org)
Patients who experienced arrhythmia during HD had higher left ventricular mass and left ventricular mass index, lower post-dialysis K+ level, higher QTc and QTdc both before and after HD. (who.int)
Objectives: This study sought to test the hypothesis that a vectorcardiographic parameter, the QRS vector magnitude (QRSVm), can risk stratify those patients at risk for sustained spontaneous ventricular arrhythmias (VAs) or ventricular arrhythmia inducibility (VAI) in a large cohort of patients with tetralogy of Fallot (TOF). (lu.se)
Torsades de Pointes Ventricular Tachycardia Torsades de pointes ventricular tachycardia is a specific form of polymorphic ventricular tachycardia in patients with a long QT interval. (msdmanuals.com)
In the AHA's first scientific advisory on WCDs issued last spring, the organization said a WCD may serve as a temporary means to prevent SCD in patients who have a transient risk of a life-threatening arrhythmia as well as for individuals with an indication for a permanent defibrillator but for whom an ICD is temporarily contraindicated. (medscape.com)
It states that in patients with nonischemic cardiomyopathy, HF with NYHA class 2-4 symptoms and left ventricular ejection fraction (LVEF) of 35% or less despite guideline-directed medical therapy, an ICD is recommended if meaningful survival of greater than 1 year is expected. (medscape.com)
According to the HEMO study, cardiac arrhythmia and ST-segment changes during deaths account for 39.4% of all deaths in HD in young patients with no concomitant patients on chronic haemodialysis (HD). (who.int)
The study sample was drawn from patients nant ventricular tachyarrhythmia [ 2 ]. (who.int)

Ventricular tachycardia can occur due to coronary heart disease, aortic stenosis, cardiomyopathy, electrolyte imbalance, or a heart attack. (wikipedia.org)
An increase in the chance of arrhythmia was also detected in PEX without coronary artery disease. (scirp.org)
In individuals with the post-acute coronary syndrome and normal left ventricular ejection fraction (LVEF), the appropriate duration of betablocker therapy is still unknown. (benthamscience.com)
Since coronary artery disease is the most common cause of ventricular arrhythmias, correction of coronary occlusion either by angioplasty or coronary artery bypass is quite common and successful. (britannica.com)
In addition, a significant group of people who have no evidence of coronary artery disease develop a propensity for ventricular arrhythmias. (britannica.com)
Left ventricular non-compaction (LVNC) is a rare congenital cardiomyopathy, with or without LV dysfunction, characterized by prominent trabeculations and associated deep recesses which communicate with the ventricular cavity rather than the coronary circulation. (banglajol.info)
It is distinct from structural cardiac disorders such as coronary artery disease, valvular disorders, and congenital heart disorders. (msdmanuals.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)

Implantable cardiac defibrillators (ICDs) are highly effective in terminating malignant ventricular arrhythmias in this group, but they are associated with significant morbidity, such as inappropriate shocks and device complications. (centenary.org.au)
Malignant causes included primary or secondary cardiac tumors, lung cancer, mediastinal tumors, or lymphoma, which may obstruct or compress the superior vena cava. (frontiersin.org)

These arrhythmias are particularly amendable to defibrillation. (academicjournals.org)

Reentrant, automatic, or triggered mechanisms may cause ventricular arrhythmia (VA), just as these mechanisms cause supraventricular tachycardia (SVT) and other arrhythmias. (medscape.com)
Inherited mutations in KCNQ1 and KCNE2 cause ventricular and atrial cardiac arrhythmias, previously presumed to be due entirely to the role of these proteins in cardiac muscle. (sciencedaily.com)

citation needed] Polymorphic ventricular tachycardia, on the other hand, is most commonly caused by abnormalities of ventricular muscle repolarization. (wikipedia.org)
Arrhythmias, on the other hand, are electrical abnormalities that can be caused by a variety of factors. (everydayhealth.com)
2012 ACCF/AHA/HRS focused update incorporated into the ACCF/AHA/HRS 2008 guidelines for device-based therapy of cardiac rhythm abnormalities: a report of the American College of Cardiology Foundation/American Heart Association Task Force on Practice Guidelines and the Heart Rhythm Society. (medlineplus.gov)

Riesgo coronario atribuible a los factores de riesgo cardiovascular en población española. (guiasalud.es)

While waiting for a defibrillator, a precordial thump may be attempted (However reserved to those who have the prior experience of doing so) in those on a heart monitor who are seen going into an unstable ventricular tachycardia. (wikipedia.org)

It is well explained by the pathophysiology of arrhythmias. (escardio.org)
Thanks to technologic advances in cardiac imaging, multimodality studies provide insight into the pathophysiology of both ischemic and nonischemic cardiomyopathy. (medscape.com)

Episodes of ventricular tachycardia can cause light-headedness, dizziness, and fainting (syncope). (medlineplus.gov)
Because of non-sustained ventricular tachycardia with haemodynamic instability and syncope, an implantable cardioverter-defibrillator was implanted. (tidsskriftet.no)

The chaotic nature of excitation and inefficient ventricular contraction in pathological ventricular arrhythmias frequently compromises circulation . (britannica.com)
The clinical manifestations of WPW syndrome reflect the associated tachyarrhythmia episodes-rather than the anomalous ventricular excitation per se. (medscape.com)

The most common cause of monomorphic ventricular tachycardia is scarring of the heart muscle from a previous myocardial infarction (heart attack). (wikipedia.org)
Irrigated radiofrequency catheter ablation guided by electroanatomic mapping for recurrent ventricular tachycardia after myocardial infarction: the multicenter thermocool ventricular tachycardia ablation trial. (varian.com)
The risk of these arrhythmias is highest immediately following an acute myocardial infarction, especially if there is impaired left ventricular function. (academicjournals.org)
The novel mechanism of action on cellular compartments has been found continually, which opens a new way for their potential application in cardiac failure and other cardiac events like post-myocardial infarction. (benthamscience.com)

The researchers were able to determine that caffeine does not impact ventricular arrhythmias and that drinking up to six cups of coffee a day did not make ventricular arrhythmias any more severe or frequent. (earth.com)

[ 1 ] Currently, Wolff-Parkinson-White (WPW) syndrome is defined as a congenital condition involving abnormal conductive cardiac tissue between the atria and the ventricles that provides a pathway for a reentrant tachycardia circuit, in association with supraventricular tachycardia (SVT). (medscape.com)
Long QT Interval Syndromes The long QT interval syndromes (LQTS) result from any congenital or acquired disorder of cardiac ion channel function or regulation (channelopathy) that prolongs ventricular myocyte action potential. (msdmanuals.com)

Previous cardiac patient seroprevalence studies in New York, NY, and Los Angeles, CA, suggest that the rate of undiagnosed T. cruzi infection is particularly high (13%-19%) among Latin American immigrants with dilated cardiomyopathy ( 6 , 7 ). (cdc.gov)

A heart arrhythmia (uh-RITH-me-uh) is an irregular heartbeat. (mayoclinic.org)

An implantable cardiac defibrillator or medications such as calcium channel blockers or amiodarone may be used to prevent recurrence. (wikipedia.org)

Ventricular tachycardia (V-tach or VT) is a fast heart rate arising from the lower chambers of the heart. (wikipedia.org)
citation needed] In monomorphic ventricular tachycardia, the shape of each heart beat on the ECG looks the same because the impulse is either being generated from increased automaticity of a single point in either the left or the right ventricle, or due to a reentry circuit within the ventricle. (wikipedia.org)
As a heart rhythm specialist who routinely treats individuals with VT, I am thrilled to see the FDA recognize Varian's cardiac radioablation system as a breakthrough technology. (varian.com)
Acute failure of catheter ablation for ventricular tachycardia due to structural heart disease: causes and significance. (varian.com)
However, these physiologic changes referred to as the "athlete's heart" may coincide with structural cardiac disease and also be a cofactor for dramatic deterioration of clinical status in a certain group of athletes. (escardio.org)
Moreover, a cardiac arrhythmia occurs when the heart pumps irregularly. (lifehack.org)
When the thyroid does not produce enough TH, a person may experience symptoms such as fatigue and a lowered heart rate, but there is also a more complex interplay between thyroid function, cardiac structure and cardiac arrhythmias. (sciencedaily.com)
As the heart rate increases in response to physical activity or emotional stress, it can trigger an abnormally fast heartbeat called ventricular tachycardia. (medlineplus.gov)
Impaired calcium regulation in the heart can lead to ventricular tachycardia in people with CPVT. (medlineplus.gov)
The links between caffeine and an increased risk of heart disease are not well defined, and there is a great deal of conflicting research on how exactly caffeine affects heart problems like arrhythmias. (earth.com)
The results of the study help clarify the links between caffeine and some heart conditions, and possibly proves that coffee, to some extent, is beneficial for people with heart arrhythmias. (earth.com)
A heart arrhythmia occurs when the electrical signals that tell the heart to beat don't work properly. (mayoclinic.org)
A heart arrhythmia may feel like a fluttering, pounding or racing heartbeat. (mayoclinic.org)
Some heart arrhythmias are harmless. (mayoclinic.org)
Heart arrhythmia treatment may include medicines, devices such as pacemakers, or a procedure or surgery. (mayoclinic.org)
A heart-healthy lifestyle can help prevent heart damage that can trigger some heart arrhythmias. (mayoclinic.org)
In general, heart arrhythmias are grouped by the speed of the heart rate. (mayoclinic.org)
In those with heart disease, ventricular tachycardia can be an emergency that needs immediate medical care. (mayoclinic.org)
Clinical features of cardiac involvement include heart block, ventricular arrhythmias, and left ventricular dysfunction. (asnc.org)
1 Diagnosis of CS currently relies mainly on clinical criteria published by Japanese Ministry of Health and Heart Rhythm Society, both of which require a proven histologic or clinical diagnosis of extra-cardiac sarcoidosis along with clinical criteria mentioned above and/or imaging evidence of CS by cardiac magnetic resonance imaging (CMR) or F-18- Flouro dexoy glucose positron emission tomography (FDG PET). (asnc.org)
The arrhythmia is commonly precipitated by exacerbation of COPD, sometimes due to infection or exacerbation of heart failure. (medscape.com)
Number of Primary Implants in 2005 and 2006, According to Type of Heart Disease, Clinical Arrhythmia, and Presentation. (revespcardiol.org)
European Heart Rhythm Association (EHRA) consensus document on the management of supraventricular arrhythmias, endorsed by Heart Rhythm Society (HRS), Asia-Pacific Heart Rhythm Society (APHRS), and Sociedad Latinoamericana de Estimulación Cardiaca y Electrofisiologia (SOLAECE). (bmj.com)
Overview of Arrhythmias 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. (msdmanuals.com)

Under any circumstance where cardiac injury has occurred, a ventricular arrhythmia may potentially become a lethal ventricular event. (britannica.com)
Even ventricular tachycardia can potentially cause shock and be lethal in its own right. (britannica.com)

The most frequent automatic rhythm is caused by increased spontaneous depolarization of phase 4 of the cardiac action potential. (medscape.com)
One basic mechanism appears to result from spontaneous generation of cardiac impulses within the ventricle. (britannica.com)

Ventricular tachycardia may be monomorphic or polymorphic and nonsustained or sustained. (msdmanuals.com)

An example of a highly effective therapeutic agent used for arrhythmias is amiodarone, a structural analog of thyroid hormone. (britannica.com)

The appearance of Microvolt T-Wave Alternans indicates the presence of a type of cellular metabolic activity that frequently leads to ventricular tachyarrhythmias. (medgadget.com)

The study, published in the journal JACC: Clinical Electrophysiology , sheds light on how caffeine influences cardiac rhythm. (earth.com)

However, diagnosis of isolated cardiac sarcoidosis using these diagnostic criteria or with endomyocardial biopsy can be challenging. (asnc.org)

hence, reliable detection of initial arrhythmia episodes is crucial to provide timely treatment. (physionet.org)
During admission, the patient developed several episodes of chest pain lasting five to fifteen minutes followed by non-sustained ventricular tachycardia, and initially no ST elevation in the electrocardiogram (ECG). (tidsskriftet.no)
Despite PCI, he had persistent episodes of chest pain with ST elevation and non-sustained ventricular tachycardia. (tidsskriftet.no)
After treatment with calcium channel blocker together with long-acting nitrate, there were no new episodes of chest pain or non-sustained ventricular tachycardia. (tidsskriftet.no)

Pacemakers are generally implanted to alleviate symptoms of decreased cardiac output related to rate or arrhythmia. (cms.gov)

It may be very difficult to differentiate between ventricular tachycardia and a wide-complex supraventricular tachycardia in some cases. (wikipedia.org)

Cardiac involvement can occur alone or with extra cardiac involvement. (asnc.org)
The mechanism by which ventricular arrhythmias occur is not completely understood. (britannica.com)
LVNC affects all age groups and can occur in isolation or association with other cardiac and systemic anomalies, especially with neuromuscular disorders. (banglajol.info)

Is hypertensive left ventricular hypertrophy a cause of sustained ventricular arrhythmias in humans? (whiterose.ac.uk)

In this overview based on the latest research, we discuss the integral role of comprehensive imaging studies, particularly transthoracic echocardiography (TTE) and cardiac magnetic resonance imaging (CMR), in differentiating potential causes of HF and diagnosing various cardiomyopathies. (medscape.com)
Transthoracic echocardiography , the most widely available initial standard of care test for ventricular dysfunction, can help differentiate ischemic and nonischemic etiologies of cardiomyopathies. (medscape.com)
Myocardial strain imaging uses speckle-tracking echocardiography to measure tissue deformation through the cardiac cycle. (medscape.com)

Genes previously known to be essential to the coordinated, rhythmic electrical activity of cardiac muscle -- a healthy heartbeat -- have now also been found to play a key role in thyroid hormone (TH) biosynthesis, according to researchers. (sciencedaily.com)
KCNQ1 and KCNE2 were each recognized more than a decade ago as forming potassium channels in cardiac muscle that help end each heartbeat in a timely fashion. (sciencedaily.com)

citation needed] The diagnosis of ventricular tachycardia is made based on the rhythm seen on either a 12-lead ECG or a telemetry rhythm strip. (wikipedia.org)
Diagnosis of cardiac sarcoidosis (CS) can often be challenging with no clear diagnostic gold standard. (asnc.org)
2,3 While a positive cardiac Gallium-67 scan is also one of the imaging criteria for diagnosis, it has poor sensitivity and has been replaced by FDG PET. (asnc.org)
This confirmed the diagnosis of primary cardiac lymphoma (PCL). (frontiersin.org)

Reentry mechanisms are important components of ventricular arrhythmias and may be as simple as a premature ventricular beat coupled to a normal beat or as serious as a dangerous ventricular tachycardia. (britannica.com)

Significant research in cardiac resuscitation has been ongoing since the 1950s, with time, effort and money examining the multiple variables affecting survival rates. (firerescue1.com)

Risk stratifying tools are expanding with improved understanding of advanced imaging modalities, such as late gadolinium enhancement on cardiac magnetic resonance imaging (cMRI). (centenary.org.au)
This is because, given the time, arrhythmia risk typically decreases. (academicjournals.org)
This review aimed to evaluate if left ventricular hypertrophy (LVH) secondary to systemic hypertension in humans is an isolated risk factor for ventricular arrhythmogenesis. (whiterose.ac.uk)
1% risk of adverse cardiac events, and no ventricular arrhythmia events in absence of LGE. (asnc.org)

The authors' findings, published online this week by the peer-reviewed journal Nature Medicine , suggest that mutations of either of two gene products -- proteins called KCNE2 and KCNQ1 -- already known to be involved in human cardiac arrhythmias, could also cause thyroid dysfunction. (sciencedaily.com)
It has long been known that the thyroid influences cardiac function and cardiac arrhythmias," says study senior author Dr. Geoffrey W. Abbott, associate professor of pharmacology in medicine at Weill Cornell Medical College, "but our findings demonstrate a novel genetic link between inherited cardiac arrhythmia and thyroid dysfunction. (sciencedaily.com)

Anatomy23

Organisms7

Diseases69

Chemicals and Drugs55

Analytical, Diagnostic and Therapeutic Techniques and Equipment71

Phenomena and Processes27

Disciplines and Occupations3

Anthropology, Education, Sociology and Social Phenomena3

Information Science6

Named Groups1

Health Care30

Geographicals1

Fibrillation19

Arrest41

Catecholaminergic polymorphic1

Premature ventricular3

Right ventricular6

Life threatening ventricular2

Death38

Induced ventricular tachycardia1

Hypertrophic Cardiomyopathy3

Patients29

Coronary8

Malignant2

Defibrillation1

Cause ventricular2

Abnormalities3

Cardiovascular1

Unstable ventricular1

Pathophysiology2

Syncope2

Excitation2

Myocardial infarction4

Severe1

Congenital2

Cardiomyopathy1

Irregular heartbeat1

Defibrillator1

Heart24

Lethal2

Spontaneous2

Monomorphic1

Structural1

Tachyarrhythmias1

Clinical Electrophysiology1

Endomyocardial biopsy1

Episodes4

Symptoms1

Supraventricular tachycardia1

Occur3

Hypertensive1

Echocardiography3

Heartbeat2

Diagnosis4

Mechanisms1

Resuscitation1

Risk4

Dysfunction2