Search Results
Results 101 - 150 of 1873
1 2 3 4 5 6 7 8 9 10 >
Kaliebe Jeffrey W - - 2009
BACKGROUND: Ranolazine is a new anti-anginal agent that inhibits abnormal late sodium currents, indirectly causing a decrease in diastolic cardiomyocyte calcium levels. This produces an energy-sparing effect and stabilizes cardiac membranes. Ranolazine has been shown to be a potent inhibitor of triggered activity in the experimental setting. METHODS: This case ...
Dorman S H - - 2009
The case history is presented of a normally fit and well 28-year-old woman with idiopathic right ventricular outflow tract ventricular tachycardia (RVOT VT). Presentation was with a broad complex tachycardia unresponsive to first-line anti-arrhythmic drugs and DC cardioversion (immediate recurrence) but highly sensitive to flecainide and eventually successfully treated with ...
T??rko??lu Cengizhan - - 2009
BACKGROUND: In this study we evaluate wide QRS complexes observed during pharmacologic termination of supraventricular tachycardias. METHODS: Patients with supraventricular tachycardia, undergoing electrophysiologic study were enrolled. 12 mg of adenosine or 10 mg of verapamil were administered during tachycardia, under continuous monitoring of intaracardiac and surface electrocardiograms. Electrocardiographic features of ...
Bottoni Nicola - - 2009
Idiopathic ventricular tachycardia originating from the right ventricular outflow tract (RVOT) and idiopathic RVOT extrasystoles are generally considered benign arrhythmias. We describe the case of a patient with typical RVOT arrhythmias without any symptoms for many years, who died suddenly the day before a planned electrophysiological study. The only disquieting ...
Rakovec Peter - - 2009
A case of a patient with dual supraventricular tachycardias, atrioventricular nodal tachycardia, and atrial tachycardia is presented. The former was successfully ablated, whereas the latter was inducible after the ablation of the former, but without clinical importance during follow-up. However, this tachycardia showed interesting characteristics, including dual atrioventricular Wenckebach periodicity, ...
Kalbfleisch Steven - - 2009
This case describes a patient with two separate foci of idiopathic ventricular tachycardia in the right ventricle. Both of the tachycardias manifested cycle length and QRS alternans. Both were successfully ablated and information from the electrophysiologic study and ablation procedure indicated that both tachycardias were focal, secondary to triggered activity, ...
Prutkin Jordan M - - 2009
We report a patient with a clinical history of inclusion-body myositis presenting with monomorphic ventricular tachycardia. Comprehensive evaluation demonstrated no evidence of coronary artery disease or cardiomyopathy. Programmed electrical stimulation induced the patient's clinical tachycardia as well as a second monomorphic ventricular tachycardia of a different morphology. At the time ...
Marill Keith A - - 2009
OBJECTIVES:: To determine whether adenosine is useful and safe as a diagnostic and therapeutic agent for patients with undifferentiated wide QRS complex tachycardia. The etiology of sustained monomorphic wide QRS complex tachycardia is often uncertain acutely. DESIGN:: A retrospective observational study. SETTING:: Treatment associated with emergency visits at nine urban ...
Kharrat Ilyes - - 2009
The vagal maneuver is the first line of therapeutic available for patients with paroxysmal supraventricular tachycardia. It increases vagal tone and includes the traditional ocular compression, carotid sinus massage, and Valsalva maneuver. A 40-year-old man was admitted because of 180 beats/min regular narrow QRS-complex tachycardia. The physician in the emergency ...
Hunter Ross J - - 2009
A patient with a biventricular implantable cardioverter defibrillator for heart failure had a recurrent broad complex tachycardia and underwent electrophysiologic testing. The tachycardia was induced only with ventricular pacing. There was a 1:1 atrioventricular relationship with simultaneous atrial and ventricular activation. However, atrial pacing during tachycardia suggested atrial dissociation from ...
Issa Ziad F - - 2009
Supraventricular tachycardia (SVT) with ventriculoatrial (VA) block. We report the case of a 25-year-old patient with paroxysmal SVT and intermittent VA block. Atrioventricular nodal re-entrant tachycardia with upper common pathway block and orthodromic nodoventricular or nodofascicular re-entrant tachycardia was considered in the differential diagnosis. Diagnostic characteristics were most compatible with ...
Ero─člu Serpil - - 2009
Myotonic dystrophy type 1 (MD1) is an autosomal dominant disorder characterized by myotonia, progressive muscular weakness, cataract, and cardiac involvement. Cardiac involvement is common and includes conduction system abnormalities, supraventricular and ventricular arrhythmias, and less frequently, myocardial dysfunction and ischemic heart disease. A 54-year-old woman with a previous diagnosis of ...
Srivathsan Komandoor - - 2009
Ventricular tachycardia and ventricular fibrillation are the most important causes of sudden cardiac death (SCD), particularly in those with structural heart disease and reduced left ventricular function. It is important to distinguish ventricular tachycardia from supraventricular tachycardia. A wide spectrum of ventricular arrhythmias exists, from those where the heart is ...
Kili?? Esra - - 2009
Isotretinoin (13-cis-retinoic acid), a synthetic vitamin A derivative, is used to treat a wide variety of dermatologic conditions including severe acne. Isotretinoin can trigger premature ventricular contractions (PVCs). We describe a 17-year-old boy who presented with PVCs on electrocardiogram during isotretinoin (Roaccutane, Roche) treatment for nodular facial acne. Presence of ...
Tayer-Shifman Oshrat E - - 2009
The superior toxicity profile is one of the major reasons for the widespread use of gemcitabine in cancer treatment. Bone marrow suppression is the most common side effect, while non-hematological events are relatively infrequent. Cardiac toxicity is a rare complication and cardiac arrhythmia is even rarer. We report the case ...
Cerrone Marina - - 2009
In the 8 years since the discovery of the genetic bases of catecholaminergic polymorphic ventricular tachycardia (CPVT), we have witnessed a remarkable improvement of knowledge on arrhythmogenic mechanisms involving disruption of cardiac Ca(2+) homeostasis. Studies on the consequences of RyR2 and CASQ2 mutations in cellular systems and mouse models have ...
Lee Seung-Yul - - 2009
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a familial cardiac arrhythmia that is related to RYR2 or CASQ2 gene mutation. It occurs in patients with structurally normal heart and causes exercise-emotion-triggered syncope and sudden cardiac death. We experienced a case of CPVT in an 11 year-old female patient who was admitted ...
Karacan Mehmet - - 2009
Early postoperative arrhythmias are a known complication of cardiac surgery. It is unusual, however, to encounter postoperative junctional and ectopic atrial tachycardias in the same patient. We describe our experience with a 2-year-old girl who suffered both these tachycardias after repair of a ventricular septal defect, the abnormal rhythms being ...
Gopinathannair Rakesh - - 2009
A patient with atrial flutter, intermittent non-sustained wide complex tachycardia and 1:1 AV conduction is reported. Electrophysiology testing showed counterclockwise isthmus-dependent right atrial flutter with conduction via the AV node and an innocent bystander left lateral accessory pathway. This explained the observed intermittent wide complex tachycardia. After successful bidirectional cavotricuspid ...
Fishberger Steven B - - 2009
Intravenous administration of amiodarone has recently been recommended for use during pediatric resuscitation of pediatric patients with ventricular fibrillation or pulseless ventricular tachycardia. We present two pediatric patients who received amiodarone for polymorphic ventricular tachycardia, although they were ultimately determined to have congenital long QT syndrome. Amiodarone is contraindicated in ...
Walker Nicola L - - 2009
Palpitations in pregnancy are not an uncommon complaint. We present a case of palpitations in the third trimester related to bidirectional ventricular tachycardia with evidence, of left ventricular systolic dysfunction. The case was successfully managed with flecainide therapy and urgent elective caesarean section. The rhythm stabilised to sinus rhythm and ...
Cornette J - - 2009
Ultrasound examination of a fetus at 32 weeks' gestation revealed dilated cardiomyopathy and a heart rate of 170 beats per minute. Prenatally, this mild tachycardia was not primarily suspected to be the cause of the myocardial changes. Postnatal electrocardiography revealed a persistent junctional reciprocating tachycardia (PJRT) and the diagnosis of ...
Weber Reinhold - - 2009
We report on the characteristics and the ablation procedure of a focal atrial tachycardia originating from the non-coronary aortic cusp. The electrophysiological features of the tachycardia included: (i) incessant pattern; (ii) easy induction and termination by atrial stimulation; (iii) earliest right atrial activation at the para-hisian area; and (iv) termination ...
Koh C H - - 2009
A 19-year-old Chinese man presented with tachyarrhythmia during a human centrifuge session while performing a Valsalva manoeuvre at near normal (+1.4 Gz) centripetal forces. It was likely that the hydrostatic effects of sustained centrifugal forces, the distortion of the heart's shape, as well as swings in the autonomic dominance pre- ...
Abdelwahab Amir - - 2009
BACKGROUND: The differential diagnosis of wide complex tachycardia (WCT) with 1:1 atrioventricular (AV) relationship is broad. Accurate identification of the tachycardia mechanism is essential for successful ablation. We suggest a simple pacing maneuver that can immediately clarify the tachycardia mechanism in the electrophysiology laboratory. METHODS: Eight consecutive patients (four males, ...
Sasano Tetsuo T Heart and Vascular Research Center, Case Western Reserve University School of Medicine, Cleveland, OH 44109, - - 2009
Life-threatening ventricular arrhythmias generally occur in the setting of structural heart disease. Current clinical options for patients at risk for these rhythm disturbances are limited. We developed a porcine model of inducible ventricular tachycardia originating in the border region of a healed myocardial infarction scar. After validating the model, we ...
Teh Andrew W - - 2009
Focal atrial tachycardia is an unusual form of supraventricular tachycardia arising from defined anatomic locations and sites within the atria. Although recent advances in mapping technology have facilitated successful ablation, the surface ECG remains an important aid in localizing the focus. This review discusses the use of P-wave morphology on ...
Stevenson William G - - 2009
Sustained ventricular tachycardias occur in 1%-3% of patients undergoing cardiac surgery. Sustained monomorphic ventricular tachycardia usually indicates a scar-related arrhythmia substrate. Polymorphic arrhythmias can be due to transient events. The electrocardiographic characteristics of the arrhythmia and clinical characteristics of the patient are important considerations in the immediate and long-term management ...
Lim Hong Euy - - 2009
We report a patient with Wolff-Parkinson-White syndrome who presented with two distinct tachycardias that represented atrioventricular reentrant tachycardia utilizing left lateral accessory pathway (AP) and idiopathic left ventricular tachycardia (ILVT). Two tachycardias with a complete separate mechanism occurred spontaneously as well as following atrial or ventricular pacing. Successful ablation of ...
Nazarian Saman - - 2009
Paroxysmal supraventricular tachycardia (SVT) may have a variety of hemodynamic effects depending on rate, patient volume status, and presence of structural heart disease or left bundle branch block. We report a case of a patient with atrial tachycardia and dual atrioventricular (AV) nodal physiology who developed profound hypotension during transition ...
Cho Seung Hyun - - 2010
We routinely have performed arthroscopic shoulder surgery under general anesthesia in the beach chair position using epinephrine (0.33 mg/L) saline irrigation. At a 2-week interval, two patients, a 19-year-old man scheduled to undergo an arthroscopic Bankart repair for left traumatic anterior instability and a 49-year-old woman scheduled for an arthroscopic ...
Deo Rajat - - 2009
Entrainment mapping is an important concept in electrophysiology that allows clinicians to characterize and treat reentrant arrhythmias. Entrainment mapping has been particularly useful for the treatment of atrial flutter, reentrant atrial tachycardias, and scar-related ventricular tachycardia. In this article, we outline the conduction properties of reentrant rhythms that permit entrainment ...
Segal Oliver R - - 2009
BACKGROUND: Distinguishing atrioventricular node reentry (AVNRT) from orthodromic reentrant tachycardia (ORT) utilizing an accessory pathway (AP) can sometimes be challenging. A pacing maneuver that reliably distinguishes between the two would be of value. OBJECTIVE: This study sought to assess the utility of differential entrainment for the diagnosis of supraventricular tachycardia. ...
Feng Quan-Zhou - - 2009
INTRODUCTION: Pyrogen reaction is a side effect of intravenous infusion of solution on body; sustained ventricular tachycardia is a serious arrhythmia, no relationship between them has been reported before. CASE PRESENTATION: Two patients with sustained ventricular tachycardia refractory to lidocaine happened to have pyrogen reaction. The sustained ventricular tachycardia was ...
Katz Guy - - 2009
Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a primary electrical myocardial disease characterized by exercise- and stress-related ventricular tachycardia manifested as syncope and sudden death. The disease has a heterogeneous genetic basis, with mutations in the cardiac Ryanodine Receptor channel (RyR2) gene accounting for an autosomal-dominant form (CPVT1) in approximately 50% ...
Riera Andrés Ricardo Pérez - - 2009
A 32 year-old Caucasian male, an elite athlete, was admitted to the emergency department because of a sudden onset of palpitations which had lasted more than 12 hours and were associated with chest discomfort. He had a two-year history of recurrent stress-induced palpitations. He denied either episodes of syncope or ...
Kansal Mayank M - - 2009
We present a case of wide-complex tachycardia occurring during coronary angiography in a patient with a dual chamber pacemaker. This rhythm recurred only during coronary injection of contrast and appeared to be ventricular tachycardia. However, subsequent examination revealed the development of fusion beats followed by fully paced ventricular beats during ...
Pappas Loukas K - - 2009
The authors describe the case of a 49-year-old man who experienced an episode of palpitations and dizziness. The results of 24-hour Holter monitoring demonstrated an episode of wide QRS complex regular tachycardia. During the electrophysiological study, a wide QRS complex tachycardia with negative precordial concordance was induced. A diagnosis of ...
Lazaros George - - 2009
Naxos disease is a recessively inherited stereotype association of arrhythmogenic cardiomyopathy with a cutaneous phenotype, characterized by peculiar woolly hair and palmoplantar keratoderma. The cardiomyopathy clinically manifests by adolescence and the symptomatic presentation is usually with syncope and/or sustained ventricular tachycardia of left bundle branch block configuration. We report the ...
Puri A - - 2009
A 25-year-old previously asymptomatic pregnant woman at 36 weeks' gestation was noticed to have repetitive monomorphic ventricular tachycardia. A dilated left ventricle with moderately reduced systolic function was found on echocardiographic examination. This is a very rare presentation of peripartum cardiomyopathy (PPCMP) presenting with repetitive monomorphic ventricular tachycardia.
Arana-Rueda Eduardo - - 2009
We report an unusual association of persistent atrial flutter and bundle branch re-entrant ventricular tachycardia in a young patient without structural heart disease. Atrial flutter masked the infra-Hisian conduction disease, was fundamentally dependent on a long PR interval, and could be a possible trigger of ventricular tachycardia.
Bonney William J - - 2009
Primary tumors of the heart are rare, but they are often associated with refractory arrhythmias. Vascular tumors of the heart comprise a small minority of primary cardiac tumors. In patients with structurally normal hearts, ventricular tachycardia (VT) originating from the right ventricular outflow tract (RVOT) can be sensitive to adenosine, ...
Catanzaro John N - - 2009
Atrioventricular nodal re-entry tachycardia is the most common form of regular paroxysmal tachycardia in the adult population. This tachycardia is a re-entrant rhythm that uses the anatomic location of the atrioventricular node and its surrounding perinodal atrial tissue. The simplest concept regarding the atrioventricular nodal physiology that allows re-entry is ...
Stevenson William G - - 2009
Ventricular tachycardia (VT) is a life-threatening arrhythmia that is common to all forms of heart disease and an important cause of sudden death. Ventricular scars from infarction or replacement fibrosis provide a substrate for reentry that is a common cause. Understanding the pathophysiologic link between ventricular scars and ventricular tachycardia ...
Sugai Telma Keiko TK Graduate School of Biomedical Engineering, Tohoku University, Aoba-ku, Sendai 980-8579, Japan. - - 2009
Although implantable cardioverter-defibrillators have improved significantly in the past decades, the algorithms used in the identification of life-threatening arrhythmias are still not accurate enough. Conventional methods commonly misclassify tachycardias, sometimes initiating an unnecessary and uncomfortable treatment. In this paper, we proposed a new method for the identification of ventricular tachycardias ...
Mitrea Bogdan G BG State University of New York, Upstate Medical University, Syracuse, NY 13210, USA. - - 2009
Intramyocardial reentry is implicated as a primary cause of the most deadly cardiac arrhythmias known as polymorphic ventricular tachycardia and ventricular fibrillation. However, the mechanisms involved in the triggering of such reentry and controlling its subsequent dynamics remain poorly understood. One of the major obstacles has been a lack of ...
Bhakta Hetal - - 2010
The patient presented for electrophysiology study and ablation for a history of narrow complex tachycardia. Both typical and atypical atrioventricular nodal reentrant tachycardia (AVNRT) were induced. For the atypical AVNRT, two different entrainment responses were recorded owing to different timing in delivering the ventricular pacing train.
Cavazzoni Elena - - 2008
A 14-year-old boy with catecholamine-induced polymorphic ventricular tachycardia was treated for hypoxic brain injury after a 25-minute ventricular tachycardia arrest. He had been treated by the local paediatric cardiology service with ?-blockers for syncopal events related to episodes of ventricular tachycardia. As standard inotropic support was contraindicated, he was treated ...
Fox David J DJ University of Western Ontario, Division of Cardiology, Arrhythmia Section, University Hospital, London, Ontario, Canada. - - 2008
Supraventricular tachycardia (SVT) includes all forms of tachycardia that either arise above the bifurcation of the bundle of His or that have mechanisms dependent on the bundle of His. We conducted a review of the techniques used to differentiate the mechanisms of SVT. We searched the PubMed and MEDLINE databases ...
Omichi Chikaya - - 2009
Incessant ventricular tachycardia and long-standing ectopic beats lead to tachycardia-induced cardiomyopathy. Catheter ablation eliminates ventricular tachycardia and reverses left ventricular (LV) dysfunction. 201-Thallium ((201)Tl) scintigraphy demonstrates perfusion defects with ischemic cardiomyopathy. Reversible perfusion defects are observed even in non-ischemic cardiomyopathy, related to regional flow or metabolism derangements. 123-I-metaiodobezylguanidine ((123)I-MIBG) scintigraphy ...
1 2 3 4 5 6 7 8 9 10 >