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Topic: Sustained ventricular tachycardia

	Ventricular tachycardia
		Ventricular tachycardia (V-tach) is a rapid heart beat that originates in one of the lower chambers (the ventricles) of the heart.
		Ventricular tachycardia which lasts more than 30 seconds is referred to as sustained ventricular tachycardia.
		A person susceptible to sustained ventricular tachycardia often has a small abnormal area in the ventricles that is the source of the trigger event.
	www.lifesteps.com /gm/Atoz/ency/ventricular_tachycardia_pr.jsp (621 words)

	Health 24 - Heart, About Heart
		Ventricular tachycardia is defined as 'a salvo of consecutive ventricular heart beats at a rate of more than 120 beats per minute which persists for greater than 30 seconds or which must be stopped because blood is no longer being pumped normally by the heart'.
		Sustained ventricular tachycardia is usually seen in people who have ischaemic heart disease and who have had a previous heart attack (myocardial infarction).
		In patients with ventricular tachycardia and organic heart disease, if the blood pressure is very low and there is loss of consciousness or evidence of lack of blood to the heart muscle, congestive heart failure or poor blood supply to the brain, the arrhythmia should be stopped as fast as possible using electrical cardioversion.
	www.health24.com /medical/Condition_centres/777-792-812-1727,14410.asp (792 words)

	tnn2799i
		Ventricular tachycardias that originate in the right and left ventricle outflow tract, has rarely been associated with structural alterations of the heart.
		Many times, ventricular tachycardia often show to be sustained at high rate and not well tolerated, with inadequate response to pharmacological therapy.
		Ventricular tachycardias morphology in ECG, typically shows a positive QRS complex lead 1, and left branch bundle block pattern, the QRS axis frequently is frequently normal, but it can show right shift when it originates in the outflow tract, or left shift when its originates in the posterior region or near the right ventricle apex.
	www.fac.org.ar /cvirtual/tlibres/tnn2799i/tnn2799i.htm (991 words)

	Welcome to Ventricular Tachycardia
		Ventricular tachycardia is " a tachycardia where the origin of the arrhythmia is within the ventricles".
		That is, the tachycardia does not require the participation of the atrium or AV node and His bundle although the latter structures may be activated "passively" by retrograde conduction.
		Ventricular tachycardia related to acute ischemia or that is extremely rapid is frequently polymorphic, The probability of the presence of VT in a patient with cardiac disease increases in general with the severity of cardiac disease and is most likely to be fatal in patients with impaired ventricular function.
	www.lhsc.on.ca /uwodoc/pages/vt.htm (2014 words)

	[No title] (Site not responding. Last check: 2007-10-26)
		An implantable defibrillator is superior to antiarrhythmic drugs in prolonging survival of patients resuscitated after a near-fatal episode of ventricular fibrillation or in patients with sustained ventricular tachycardia associated with syncope, an ejction fraction less than 0.40, or CHF.
		This study shows the superiority of implantable defibrillators over antiarrhythmic drugs in patients who have sustained a near-fatal episode of ventricular fibrillation or episodes of sustained ventricular tachycardia associated with syncope, or an ejection fraction less than 0.40, or congestive heart failure, or angina.
		Based on the results of this study, an implantable defibrillator should be used as first-line therapy in patients with episodes of near-fatal ventricular fibrillation and ventricular tachycardia associated with syncope, Ej Fr < 40%, and CHF or angina..
	www.feliceapicella.it /comparison.htm (458 words)

	Sustained Ventricular Tachycardia
		With prior myocardial infarction (MI, heart attack) and ventricular aneurysm (an abnormal dilatation of a portion of the myocardium caused by a thinning of the heart muscle due to a MI, (see fig.10, fig.51a) a sustained monomorphic VT may be hemodynamically well tolerated.
		Acute Management of Sustained Monomorphic VT This form of V.T. (see figure 9b) may occur in acute or chronic ischemic heart disease, idiopathic dilated, or hypertrophic cardiomyopathy (see fig.61, fig.62) and less frequently in inflammatory or infiltration diseases, or a primary electrical disturbance.
		A second category of sustained VT (see fig.9b, fig.10, fig.51a) related to acute myocardial infarction occurs in the convalescent period, and is most common in patients with large anterior left ventricular wall infarctions.
	www.rjmatthewsmd.com /Definitions/ventricular_tachycardia.htm (3788 words)

	Heart Rhythm Society (Site not responding. Last check: 2007-10-26)
		Ventricular tachycardia lasting at least six beats up to but not including 30 seconds, terminating spontaneously and not requiring intervention on a clinical basis.
		Ventricular tachycardia with stable configuration of the QRS complexes in at least three simultaneously recorded electrocardiographic leads, with a constant relation of inscription of the QRS complexes in the three recorded leads.
		In one method, a ventricular stimulus is introduced late in diastole and the coupling interval of the stimulus is serially decreased by small intervals until either the tachycardia is terminated or ventricular refractoriness is reached.
	www.hrsonline.org /swPositionStatementFiles/ps101035898.asp (2184 words)

	Ventricular Tachycardia: Abnormal Heart Rhythms: Merck Manual Home Edition
		Ventricular tachycardia is a heart rhythm that originates in the ventricles and produces a heart rate of at least 120 beats per minute.
		Ventricular tachycardia may be thought of as a sequence of consecutive ventricular premature beats.
		Ventricular tachycardia is treated when it causes symptoms or when episodes last more than 30 seconds even without causing symptoms.
	www.merck.com /mmhe/sec03/ch027/ch027g.html (400 words)

	HighBeam Encyclopedia - tachycardia (Site not responding. Last check: 2007-10-26)
		Atrial parasystole and tachycardia: modulation and automodulation of a parasystolic focus.
		Ischemically mediated sustained monomorphic ventricular tachycardia: resolution with anti-ischemic therapy.
		Left ventricular function during stable sustained ventricular tachycardia: hemodynamic and echo-Doppler analysis.
	www.encyclopedia.com /html/X/X-tachycar.asp (221 words)

	Indian Pacing and Electrophysiology Journal - Pirat (Site not responding. Last check: 2007-10-26)
		Tachycardia induced tachycardias are not common in clinical practice, and it is believed that most cases of double tachycardia are coincidental.
		Ventricular programmed stimulation after the ablation revealed no inducible ventricular tachycardias and demonstrated that the ventriculoatrial conduction was decremental.
		Tachycardia induced tachycardia is a rare phenomenon that is only discussed in a few case reports in the literature.
	www.ipej.org /0402/pirat.htm (1323 words)

	Echocardiographic and signal averaged ECG indices associated with non-sustained ventricular tachycardia after repair of ...
		Echocardiographic and signal averaged ECG indices associated with non-sustained ventricular tachycardia after repair of tetralogy of Fallot -- Brili et al.
		with the occurrence of non-sustained ventricular tachycardia on
		Sustained ventricular tachycardia in adult patients late after repair of tetralogy of Fallot.
	heart.bmjjournals.com /cgi/content/full/85/1/57 (2355 words)

	Radiofrequency Catheter Ablation of Sustained Ventricular Tachycardia in Idiopathic Dilated Cardiomyopathy -- Kottkamp ...
		of sustained VT in idiopathic dilated cardiomyopathy (DCM) are
		Radiofrequency catheter ablation of ventricular tachycardia in patients with coronary artery disease.
		Histopathologic and electrophysiologic correlations in idiopathic dilated cardiomyopathy and sustained ventricular tachyarrhythmia.
	circ.ahajournals.org /cgi/content/full/92/5/1159 (7299 words)

	eMedicine - Ventricular Tachycardia : Article Excerpt by: Mark E Alexander, MD
		Background: 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 sudden cardiac death (SCD) and syncope.
		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.
		In clinical practice, reentrant rhythms are triggered by premature beats, and the tachycardia is often terminated with direct-current (DC) cardioversion.
	www.emedicine.com /ped/byname/ventricular-tachycardia.htm (623 words)

	Indian Pacing and Electrophysiology Journal - Folino (Site not responding. Last check: 2007-10-26)
		Its main cause is sudden cardiac death (35-45%) essentially due to episodes of sustained ventricular tachycardia or ventricular fibrillation.
		We described in 1995 the clinical significance of temporal and spatial QT dispersion, assumed to reflect inhomogeneous ventricular repolarization, as independent predictive factors of ventricular instability in patients operated on for total correction of TOF by ventriculotomy with a cut-off of 80 and 65 ms respectively.
		The prevention of sudden death by antiarrhythmic drugs should be restricted to patients with complex ventricular arrhythmias or sustained ventricular tachycardia, in the absence of severe symptoms or residual hemodynamic substrates amenable to surgical reintervention such as residual pulmonary stenosis or pulmonary valve incompetence.
	www.ipej.org /0504/folino.htm (4130 words)

	Nonsustained Ventricular Tachycardia in Coronary Artery Disease: Relation to Inducible Sustained Ventricular ...
		The relationship of paroxysmal ventricular tachycardia complicating the acute phase and ventricular arrhythmia during the late hospital phase of myocardial infarction to long-term survival.
		Prevalence, characteristics and significance of ventricular tachycardia (three or more complexes) detected with ambulatory electrocardiographic recording in the late hospital phase of acute myocardial infarction.
		Prevalence, characteristics and significance of ventricular tachycardia detected by 24-hour continuous electrocardiographic recordings in the late hospital phase of acute myocardial infarction.
	www.annals.org /cgi/content/full/125/1/35 (2216 words)

	Poly-Spectrum-VLP -AVM SAĞLIK HİZMETLERİ SAN. VE DIŞ TİC. LTD. ŞTİ (Site not responding. Last check: 2007-10-26)
		Results of laboratory and clinical studies implicate reentrant mechanisms, at least in part, in the genesis of sustained ventricular tachycardia complicating ischemic heart disease.
		Driven by the need to improve the noninvasive identification of patients susceptible to reentrant ventricular tachycardia, signal-processing technique for interrogating the terminal QRS complex and ST segment of the electrocardiogram (ECG) have been developed.
		The goal of this signal-averaged ECG technique is to detect occult derangements of ventricular activation, or late potentials, present during sinus rhythm that appear to be a hallmark for sustained ventricular arrhythmias.
	www.avmtr.com /asp/ECG_dosyalar/vlp.asp (316 words)

	Mechanoelectrical Interaction in Tetralogy of Fallot : QRS Prolongation Relates to Right Ventricular Size and Predicts ...
		The 2 patients with documented sustained ventricular tachycardia are indicated by squares.
		Those with syncope and ventricular tachycardia (squares), sudden death (triangles), and the single syncopal patient with atrial flutter (star) are plotted separately.
		Entrainment of ventricular tachycardia in postoperative tetralogy of Fallot.
	circ.ahajournals.org /cgi/content/full/92/2/231 (4766 words)

	Fish Oil Inhibits Sustained Ventricular Tachycardia
		In seven of the 10 patients, sustained monomorphic ventricular tachycardia was inducible at baseline.
		By contrast, induction of sustained ventricular tachycardia was reduced in five of seven patients after infusion of n-3 PUFA," the authors write.
		Albert recommends confirmation of these preliminary data in randomized trials with hard arrhythmic end points in combination with mortality, and she notes that three randomized trials of the effect of fish-oil supplementation on recurrent episodes of ventricular tachycardia and/or fibrillation are ongoing.
	www.canlyme.com /fishoiltachy.html (563 words)

	eMedicine - Ventricular Tachycardia : Article by Mark E Alexander, MD
		The incidence of low-grade ectopy is notably increased in patients with CHD or cardiac myopathies.
		Sustained VT is defined as consecutive ventricular rhythm longer than 30 seconds at rates faster than 110-120 bpm or a comparable arrhythmia requiring urgent cardioversion.
		Nonsustained and sustained VT: The classifications of nonsustained and sustained VT in patients with CHD are identical to those of patients with structurally normal hearts.
	www.emedicine.com /ped/topic2546.htm (8412 words)

	Cogprints - Idiopathic Fascicular Ventricular Tachycardia (Site not responding. Last check: 2007-10-26)
		Idiopathic fascicular ventricular tachycardia is an important cardiac arrhythmia with specific electrocardiographic features and therapeutic options.
		It is one of the eminently ablatable ventricular tachycardias.
		Ventricular tachycardia induced by atrial stimulation in patients without symptomatic cardiac disease.
	cogprints.org /4190 (725 words)

	Prediction of Sustained Ventricular Tachycardia Inducible by Programmed Stimulation in Patients With Coronary Artery ...
		with monomorphic and 63 with polymorphic sustained ventricular
		correlates with an increased likelihood of inducible ventricular
		Nonsustained ventricular tachycardia in patients with coronary artery disease: relationship to inducible sustained ventricular tachycardia.
	circ.ahajournals.org /cgi/content/full/99/14/1843 (4327 words)

	Ventricular Tachycardia (Site not responding. Last check: 2007-10-26)
		Ventricular Tachycardia encountered in the pre-induction period in an
		The onset of ventricular tachycardia in patients undergoing anaesthesia is a
		ventricular tachycardia was encountered in the preinduction period in an
	www.priory.com /anaes/tachy.htm (1050 words)

	Left ventricular function during stable sustained ventricular tachycardia. Hemodynamic and echo-Doppler analysis -- ...
		Left ventricular function during stable sustained ventricular tachycardia.
		sustained stable monomorphic VT. The VT cycle length was 447 +/- 92 ms
		sustained VT are neither associated with significant changes in systolic
	www.chestjournal.org /cgi/content/abstract/96/2/275 (317 words)

	ANNIA - CHANG IS WRONG
		Ventricular tachycardia Source Citation: "Ventricular tachycardia." Dorothy Elinor Stonely,
		Ventricular tachycardia (V-tach) is a rapid heart beat that originates in one of the lower chambers
		Most ventricular tachycardias are associated with serious heart disease such as coronary artery
	www.cyclingforums.com /t-90484-15-1.html (2892 words)

	NGC - NGC Summary
		Non-sustained ventricular tachycardia (Holter) (Level of Evidence B; McKenna et al., 1988; Elliott et al., 2001; Elliott et al., 2000; McKenna et al., 1981; Maron et al., 1981; Spirito et al., 1994; McKenna et al., 1994; Fananapazir et al., 1992; Maron et al., 2000)
		Ventricular tachycardia (Level of Evidence C; Daliento et al., 1995; Blomstrom-Lundqvist, Sabel, and Olsson, 1987; Marcus et al., 1989; Corrado et al., 1997; Turrini et al., 1999; Lemery et al., 1989; Leclercq and Coumel, 1989; Leclercq et al., 1996)
		Sustained ventricular tachycardia (Level of Evidence B; Brembilla-Perrot et al., 1991; Middlekauff et al., 1993; Knight et al., 1999; Meinertz et al., 1984)
	www.guideline.gov /summary/summary.aspx?doc_id=2977 (5295 words)

	non-sustained ventricular tachycardia
		I am a Brazilian Anesthesiologist whose father, a doctor also, has undergone heart surgery at Cleveland Clinic 11 years ago (partial ventriculectomy with teflon patch, due to a left ventricular aneurysm after the occlusion of the anterior descendent coronary artery).
		He underwent an urgent bypass surgery three months ago, in Sao Paulo (Hospital do Coracao), because it was found that his right descendent coronary artery was 80% occluded during a CAT to perform an electrophysiological study of his non-sustained ventricular tachycardia episodes.
		He is now recovering well, but the issue of the ventricular tachycardia remains: some colleagues insist he undergo electrophysiological study again, others (including his surgeon) want him not to perform any invasive procedure, rather mantaining the episodes of ventricular tachycardia controlled with antiarrytimic drugs.
	www.medhelp.org /perl6/cardio/archive/9062.html (289 words)

	Do statins influence the prognostic impact of non-sustained ventricular tachycardia after ST-elevation myocardial ...
		Prognostic value of non-sustained ventricular tachycardias after acute myocardial infarction in the thrombolytic era: importance of combination with frequent premature beats.
		Non-sustained ventricular tachycardia in coronary artery disease: relation to inducible sustained ventricular tachycardia.
		Predictive value of frequency, duration and rate of ventricular salvos in ambulatory ECG for inducibility of sustained ventricular tachycardia.
	eurheartj.oxfordjournals.org /cgi/content/full/26/11/1078 (3148 words)

	IngentaConnect Triggers of Sustained Monomorphic Ventricular Tachycardia Differ ... (Site not responding. Last check: 2007-10-26)
		By analyzing electrograms from implantable cardioverter defibrillator (ICD), we sought to determine whether there were differences in VT initiation patterns between patients with ischemic and nonischemic cardiomyopathy.
		The trigger for VT onset was classified as a ventricular premature beat (VPB), supraventricular tachycardia, or of “sudden onset.” The baseline cycle length, VT cycle length, coupling interval, and prematurity ratio were recorded for each event.
		A VPB initiated the VT in 58 episodes (92%), 1 episode (2%) was initiated by a supraventricular tachycardia, and 4 episodes (6%) were sudden onset.
	ingentaconnect.com /content/bsc/anec/2006/00000011/00000002/art00003 (346 words)

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