Cases reported "Tachycardia, Ventricular"

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1/144. Potential proarrhythmic effects of implantable cardioverter-defibrillators.

    Implantable cardioverter-defibrillator (ICD) interventions have the potential to be proarrhythmogenic. New arrhythmias can occur in the setting of clinically appropriate therapies, as well as during a cardiac rhythm for which therapy is not intended. Cardioversion/defibrillation therapies, antitachycardia pacing, and antibradycardia pacing are potential triggers for the development of new arrhythmias. Newer ICDs allow better recognition and interpretation of the arrhythmias that are induced by delivered therapies. Two cases of ICD-induced proarrhythmias are described. Based on the course of these patients and review of previous reports, proarrhythmic effects of ICD interventions along with prevention and management strategies are discussed.
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ranking = 1
keywords = arrhythmogenic
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2/144. Reversible catecholamine-induced cardiomyopathy in a heart transplant candidate without persistent or paroxysmal hypertension.

    BACKGROUND: Both dilated and hypertrophic cardiomyopathy have been reported in patients with pheochromocytoma, who were almost always hypertensive. The outcome frequently has been fatal, yet cardiac dysfunction can be reversible after medical or surgical therapy for the pheochromocytoma. methods: We report the case of a patient with dilated cardiomyopathy without persistent or paroxysmal hypertension, who was found to have a pheochromocytoma during initial medical evaluation. RESULTS: The identification and treatment of the pheochromocytoma led to significant improvement in cardiac function and cardiac transplantation was avoided. CONCLUSIONS: This case illustrates some unusual features in pheochromocytoma-induced cardiomyopathy: (1) absence of persistent or paroxysmal hypertension, (2) initial presentation with acute myocardial infarction and normal coronary arteries, and (3) recurrent episodes of nonsustained ventricular tachycardia.
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ranking = 0.026861818671729
keywords = cardiomyopathy
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3/144. Intraoperative use of automated external defibrillator.

    We report on the anesthetic management of a patient with peripartum cardiomyopathy and frequent episodes of ventricular tachycardia, who underwent surgery for tracheal stenosis. Prior to this surgery, the patient had been implanted with an automatic implantable cardioverter-defibrillator (AICD), placed abdominally. In the operating room, the AICD was deactivated, and an automated external defibrillator (AED) was placed. Intraoperatively, the AED identified and treated the patient's ventricular tachycardia. Advantages of the AED in this hospital setting included rapid response to the cardiomyopathy, safe, hands-free operation, and minimal disruption of the surgical procedure. safety concerns when using the AED are also detailed.
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ranking = 0.0076748053347796
keywords = cardiomyopathy
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4/144. Ventricular tachycardia in an adolescent with arrhythmogenic right ventricular dysplasia.

    We report the case of an adolescent boy with exertional syncope and ventricular tachycardia caused by arrhythmogenic right ventricular dysplasia. diagnosis was determined by transthoracic echocardiography and definitive management with an automatic internal cardiac defibrillator. Emergency physicians must be aware of this serious but treatable cause of adolescent exertional syncope.
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ranking = 17.632299851505
keywords = arrhythmogenic, ventricular dysplasia, right ventricular dysplasia, arrhythmogenic right, arrhythmogenic right ventricular dysplasia, dysplasia
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5/144. Successful catheter ablation against ventricular tachycardia associated with myotonic dystrophy.

    myotonic dystrophy (MD) is characterized by myotonia and muscular dystrophy and cardiac involvement with tachy-arrhythmia is rarely encountered. We report a case of MD complicated with severe left ventricular hypofunction and incessant ventricular tachycardia (VT) with varying heart rates. The morphology of VT suggested that it originated from the right ventricular outflow tract, and electrophysiological study disclosed that the mechanism of VT was abnormal automaticity. catheter ablation was performed to treat this VT. The patient had a cardiomyopathy with normal coronary arteries. The specimen of RV biopsy showed moderate hypertrophy, mild fat infiltration and slight fibrosis. These findings are histologically consistent with myotonic dystrophy.
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ranking = 0.0038374026673898
keywords = cardiomyopathy
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6/144. An unusual case of ST elevation in a 39-year-old man.

    A 39-year-old man presented to a university hospital emergency department with anginal chest pain, ventricular tachycardia and ST elevation in the anterolateral leads (V3 to V6, I and aVL). Due to discrepancies in the history and physical examination, thrombolysis was withheld until a past electrocardiogram could be obtained, which was unchanged. Subsequent investigations revealed no evidence of myocardial necrosis, and the patient was diagnosed with hypertrophic cardiomyopathy. This is the first reported case of hypertrophic cardiomyopathy with ST elevation as the predominant electrocardiographic abnormality. In patients with discrepancies in the clinical presentation, it is essential to obtain past elecrocardiograms to ensure appropriate utility of thrombolysis.
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ranking = 0.0076748053347796
keywords = cardiomyopathy
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7/144. Ablation of ventricular tachycardia by isolating the critical site in a patient with arrhythmogenic right ventricular cardiomyopathy.

    We describe a patient with arrhythmogenic right ventricular cardiomyopathy in whom ventricular tachycardia (VT) was ablated by isolating a relatively large area of the critical site using catheter ablation. Endocardial mapping showed abnormal fragmented electrograms with delayed potential (DP) from an entire area of the aneurysm. Pace mappings from the aneurysm produced a QRS morphology identical to that of clinical VT. After catheter ablation was performed at the exit site of the VT critical area, programmed stimulation inside the aneurysm captured the DP but not the QRS complexes. These data suggest that VT can be ablated successfully by isolation of the critical area.
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ranking = 19.911191676131
keywords = arrhythmogenic right ventricular cardiomyopathy, arrhythmogenic, arrhythmogenic right, right ventricular cardiomyopathy, ventricular cardiomyopathy, cardiomyopathy
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8/144. Elevation of defibrillation thresholds with propofol during implantable cardioverter-defibrillator testing.

    A 26-year-old man with severe dilated cardiomyopathy and frequent ventricular tachycardia treated with propafenone plus mexiletine underwent implantable cardioverter-defibrillator testing one day after dual chamber defibrillator implantation. There were no significant changes in the R-wave and lead position on chest x-ray. Routine defibrillator threshold (DFT) testing after 320 mg intravenous propofol demonstrated high DFTs (greater than 31 Joules and requiring 360 Joules externally for termination). Change in polarity failed to improve DFTs. After about 20 minutes of washout, conscious sedation was performed with 20 mg of midazolam and repeat DFTs were equal to 21 Joules. This case demonstrates the potential for an acute dose dependent rise in DFT with propofol.
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ranking = 0.0038374026673898
keywords = cardiomyopathy
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9/144. Spontaneous sustained monomorphic ventricular tachycardia after administration of ajmaline in a patient with brugada syndrome.

    We present the case of a 13-year-old boy with an episode of aborted sudden death, absence of structural heart disease, and a characteristic ECG pattern of right bundle branch block with persistent ST-segment elevation in the right precordial leads, in whom a monomorphic sustained ventricular tachycardia developed spontaneously after the administration of ajmaline. This effect may be related to an increased inhomogeneity of repolarization mediated by the drug and demonstrates the arrhythmogenic potential of Class I antiarrhythmic drugs in patients with brugada syndrome.
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ranking = 1
keywords = arrhythmogenic
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10/144. Ventricular tachycardia as a complication of atrial flutter ablation.

    A 61-year-old woman with dilated cardiomyopathy, who previously underwent successful radiofrequency catheter ablation for atrial flutter, developed monomorphic ventricular tachycardia (VT). The site of VT origin was the inferobasal right ventricle adjacent to the previous atrial isthmus ablation area. The most likely mechanism for the VT was scar-related reentry, the scar being the result of previous radiofrequency lesions in the atrial isthmus. The VT was successfully ablated.
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ranking = 0.0038374026673898
keywords = cardiomyopathy
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