Following myocardial infarction (MI), the myocardium is prone to calcium-driven alternans, which typically precedes ventricular tachycardia and fibrillation. (frontiersin.org)
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)
Patients with structural lesions on transthoracic echocardiography (TTE) and/or cardiac magnetic resonance imaging (c-MRI), with sustained ventricular tachycardia/supra-ventricular tachycardia or severe valvular disease were excluded. (romanianjournalcardiology.ro)
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)
Torsade de pointes is an uncommon and distinctive form of polymorphic ventricular tachycardia (VT) characterized by a gradual change in the amplitude and twisting of the QRS complexes around the isoelectric line (see the image below). (medscape.com)
Cases of polymorphous ventricular tachycardia in which the QT interval is not prolonged are treated as generic ventricular tachycardia. (medscape.com)
For more information, go to Ventricular Tachycardia . (medscape.com)
Arrhythmias7
Disopyramide is a prescription medications used to treat life-threatening ventricular (lower chambers of the heart) arrhythmias. (rxwiki.com)
Journal of Interventional Cardiac Electrophysiology : An International Journal of Arrhythmias and Pacing. (ottawaheart.ca)
We have state-of-the-art electrophysiology ablation labs, a dedicated device/procedure lab and board-certified cardiac electrophysiologists on staff, so you can be assured that the treatment of your abnormal heart rhythms (arrhythmias) is in the best possible hands. (uchealth.org)
A group of cardiac arrhythmias in which the cardiac contractions are not initiated at the SINOATRIAL NODE. (uams.edu)
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)
Some arrhythmias (eg, PACs, PVCs, PSVT) often occur spontaneously in patients without serious underlying disorders, but others are often caused by a serious cardiac disorder. (msdmanuals.com)
The simulation of electrocardiographic (ECG) and photoplethysmographic (PPG) signals with cardiac arrhythmias is important when developing and testing arrhythmia detectors. (physionet.org)
PVCs10
However, very frequent PVCs can be symptomatic of an underlying heart condition (such as arrhythmogenic right ventricular cardiomyopathy). (wikipedia.org)
Idiopathic premature ventricular complexes (PVCs) are considered a benign form of cardiac arrhythmia. (juniperpublishers.com)
However, several reports demonstrated that frequent PVCs were associated with left ventricular (LV) dysfunction, increased LV dimensions and cardiomyopathy. (juniperpublishers.com)
Electrophysiology study using the Carto® 3 System (Biosense Webster, Irvine, CA) showed PVCs arising from anteroseptal right ventricular outflow tract. (juniperpublishers.com)
3 ] in 1998 had shown that premature ventricular complexes (PVCs) was associated with cardiomyopathy and pharmacological suppression of PVCs in patients with presumed idiopathic dilated cardiomyopathy subsequently improved left ventricular (LV) systolic dysfunction. (juniperpublishers.com)
She was diagnosed with dilated cardiomyopathy based on echocardiography that showed a reduced left ventricular ejection fraction (LVEF) of 25% and LV systolic diameter 5.2cm with mild functional mitral regurgitation (MR). Her baseline 12-lead ECG showed inferior axis PVCs with left bundle branch block morphology ( Figure 1 ). (juniperpublishers.com)
Abstract: Aims - Frequent premature ventricular complexes (PVCs) may induce/aggravate LV systolic dysfunction (LVD) by tachy(dyssynchrono)cardiomyopathy (tCMP) in patients with/without previous structural heart disease. (romanianjournalcardiology.ro)
Considerable overlap between patients with premature ventricular complexes (PVCs) that are at risk for tachycardiomyopathy and those who will maintain normal LV function below the threshold of 26% PVCs. (romanianjournalcardiology.ro)
Premature ventricular complexes (PVCs) are frequently encountered in both structurally normal and diseased hearts and high arrhythmic burden is known to induce or aggravate or induce left ventricular dysfunction (LVD). (romanianjournalcardiology.ro)
Arrhythmia5
Norpace should not be given to patients uncompensated or marginally compensated congestive heart failure or hypotension unless the congestive heart failure or hypotension is secondary to cardiac arrhythmia . (rxwiki.com)
Mathematics can be used to analyze and model cardiac arrhythmia. (aip.org)
The development of wearable devices to record and analyze cardiac rhythms offers new prospects for the diagnosis and treatment of cardiac arrhythmia. (aip.org)
Background and aims: Atrial fibrillation (AF) is the most common form of cardiac arrhythmia resulting from structural and/or electrophysiological abnormalities with abnormal impulse formation. (123dok.com)
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)
BrS is associated with an increased risk of syncope, palpitations, chest pain, convulsions, difficulty in breathing (nocturnal agonal breathing) and/or Sudden Cardiac Death (SCD) secondary to PVT/VF, unexplained cardiac arrest or documented PVT/VF or Paroxysmal atrial fibrillation (AF) in the absence of apparent macroscopic or structural heart disease, electrolyte disturbance, use of certain medications or coronary heart disease and fever. (bvsalud.org)
Right ventricular3
The electrophysiological characteristics of diurnal variations in idiopathic right ventricular outflow tract (RVOT) VA have not previously been elucidated. (tmu.edu.tw)
Activation mapping with a contact-force ablation catheter (7.5 French, ThermoCool® SmartTouch® Catheter, Biosense-Webster) was performed and the earliest activation was detected from the anteroseptal right ventricular outflow tract ( Figure 2 ). (juniperpublishers.com)
The syndrome is caused by changes in the structure and function of certain cardiac ion channels and reduced expression of Connexin 43 (Cx43) in the Right Ventricle (RV), predominantly in the Right Ventricular Outflow Tract (VSVD), causing electromechanical abnormalities. (bvsalud.org)
Electrophysiology2
Our cardiac electrophysiology program is the largest of its type in the region. (uchealth.org)
Previous studies have identified that the need for a permanent ventricular pacing system (PPMv) may be associated with additional adverse long-term outcomes.OBJECTIVES: The goal of this study was to quantify the attributable risk of PPMv in patients with SV, and to identify modifiable risk factors.METHODS: This international study was sponsored by the Pediatric and Congenital Electrophysiology Society. (stanfordchildrens.org)
Tachyarrhythmias3
Diurnal variations in ventricular tachyarrhythmias (VAs) have been demonstrated in idiopathic arrhythmogenic heart disease. (tmu.edu.tw)
Some patients are aware of virtually every premature ventricular beat, but others are unaware of even complex atrial or ventricular tachyarrhythmias. (msdmanuals.com)
These EADs appear as pathologic U waves on a surface ECG, and, when they reach a threshold, they may trigger ventricular tachyarrhythmias. (medscape.com)
Ablation2
Treatment options range from medication to atrial and ventricular ablation to pacemaker and defibrillator implantation (ICD) and the WATCHMAN ™ device. (uchealth.org)
Mean left ventricular ejection fraction (LVEF) in the tCMP group (7 patients) was 38% ± 5.26 which increased 1 month after RF ablation to 54.6% ± 3.64 (87.35% of recovered LVEF), at 3 months to 56% ± 2.23 and at 6 months 57% ± 2.73. (romanianjournalcardiology.ro)
Contractions5
Heart sounds of a 16 year old girl with premature ventricular contractions and other types of ectopic beats. (wikipedia.org)
Premature ventricular contractions may be associated with underlying heart disease, and certain characteristics are therefore elicited routinely: the presence of signs of heart disease or a known history of heart disease (e.g. previous myocardial infarction), as well as heart disease or sudden cardiac death in close relatives. (wikipedia.org)
Premature ventricular contractions occur in healthy persons of any age, but are more prevalent in the elderly and in men. (wikipedia.org)
There are three main physiological explanations for premature ventricular contractions: enhanced ectopic nodal automaticity, re-entry signaling, and toxic/reperfusion triggered. (wikipedia.org)
The diurnal variation type (group 1, n = 36) was defined as those patients who had most ventricular premature contractions (VPCs) during the night hours by preprocedure Holter recordings. (tmu.edu.tw)
Cardiomyopathy2
Nandakumar R, Koh K W, Alan K C C, Yap L B, Razali O, Zulkeflee M. Successful Treatment of Cardiomyopathy Induced by Premature Ventricular Complexes. (juniperpublishers.com)
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)
Morphology3
Ventricular premature beats are characterized by wide QRS complexes that differ in morphology from the patient's normal beats. (health.am)
Controls were matched 1:1 to PPMv subjects by ventricular morphology and sex, identified within center, and enrolled at matched age. (stanfordchildrens.org)
In torsade, the morphology of the QRS complexes varies from beat to beat. (medscape.com)
Frequent3
It was previously thought that frequent ventricular complexes in patients without structural heart disease was considered to be a benign condition without prognostic significance [ 1 , 2 ]. (juniperpublishers.com)
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)
Frolkis JP et al: Frequent ventricular ectopy after exercise as a predictor of death. (health.am)
Pacing2
Impact and Modifiers of Ventricular Pacing in Patients With Single Ventricle Circulation. (stanfordchildrens.org)
Median percent ventricular pacing (Vp) was 90.8% (25th-75th percentile: 4.3%-100%) in the PPMv cohort. (stanfordchildrens.org)
Beats5
They include both atrial and ventricular premature beats, and are also known as extra or ectopic heartbeats. (uams.edu)
Exercise generally abolishes premature beats in normal hearts, and the rhythm becomes regular. (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)
If no associated cardiac disease is present and if the ectopic beats are asymptomatic, no therapy is indicated. (health.am)
The ventricular rate can range from 150 beats per minute (bpm) to 250 bpm. (medscape.com)
Sudden1
3) Risk stratification for sudden cardiac death (SCD). (aip.org)
Conduction2
Simulations also demonstrated that β-adrenergic receptor stimulation in this specific region reduced the formation of conduction block and the probability of premature ventricular activation propagation. (frontiersin.org)
While high levels of overall cardiac sympathetic drive are a negative prognostic indicator of mortality following MI and during heart failure, β-adrenergic receptor stimulation in the infarct border zone reduced spatially heterogeneous alternans, and prevented conduction block and propagation of extrasystoles. (frontiersin.org)
Palpitations3
Palpitations are the perception of cardiac activity. (msdmanuals.com)
Ordinarily, sinus rhythm at a normal rate is not perceived, and palpitations thus usually reflect changes in cardiac rate or rhythm. (msdmanuals.com)
In some cases, palpitations are perceived in the absence of any abnormal cardiac activity. (msdmanuals.com)
Extrasystole1
In cases of isolated extrasystoles, the patient may actually perceive the augmented postextrasystolic beat as the "skipped" beat rather than the premature beat itself, probably because the extrasystole blocks the next sinus beat and allows longer ventricular filling and thus a higher stroke volume. (msdmanuals.com)
Hypotension1
Some specific conditions known to decrease oxygen delivery during anesthesia include reduced cardiac output, hypotension, hypoxemia, certain dysrhythmias, and severe hypoventilation. (vin.com)
Magnetic2
0.05) dilation of the left ventricle, and reduction in ejection fraction compared to sham operated rats ( n = 4) on 7 T cardiac magnetic resonance imaging. (frontiersin.org)
Cardiac magnetic resonance imaging did not show inducible ischemia, fibrosis, or inflammation. (juniperpublishers.com)
Ischemia1
Cardiac MRI showed no inducible ischemia, fibrosis, infarction or inflammation. (juniperpublishers.com)
Patients3
We also consult with the Advanced Heart Failure team at UCHealth University of Colorado Hospital when we have patients who might need LVAD (left ventricular assist device) or a heart transplant. (uchealth.org)
Some patients simply have heightened awareness of normal cardiac activity, particularly when exercise, febrile illness, or anxiety increases heart rate. (msdmanuals.com)
As a pediatric cardiac electrophysiologist, I provide the very best care for my patients through state-of-the-art and evidence-based treatments. (stanfordchildrens.org)
Clinical1
The clinical perception of cardiac phenomena is highly variable. (msdmanuals.com)
Normal1
During the initial upstroke of action potential in a normal cardiac cell, a rapid net influx of positive ions (Na + and Ca ++ ) occurs, which results in the depolarization of the cell membrane. (medscape.com)
Long1
Jouven X et al: Long-term outcome in asymptomatic men with exercise-induced premature ventricular depolarizations. (health.am)
Year1
This graph shows the total number of publications written about "Cardiac Complexes, Premature" by people in UAMS Profiles by year, and whether "Cardiac Complexes, Premature" was a major or minor topic of these publications. (uams.edu)
Content1
Oxygen delivery to the tissue is dependent on oxygen content of the blood and cardiac output. (vin.com)