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1/13. 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 = 1
keywords = cardiomyopathy
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2/13. First evidence of premature ventricular complex-induced cardiomyopathy: a potentially reversible cause of heart failure.

    tachycardia-induced cardiomyopathy is a well-recognized and reversible condition, but left ventricular dysfunction due to frequent isolated premature ventricular complexes (PVCs) has not been reported. We observed resolution of dilated cardiomyopathy in a patient after a focal source of PVCs was eliminated by radiofrequency ablation. In a subset of patients with heart failure, PVC-induced cardiomyopathy may be a potentially reversible cause of left ventricular dysfunction.
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ranking = 1
keywords = cardiomyopathy
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3/13. A case of bad timing: inappropriate implantable cardioverter defibrillator therapy due to a critically placed premature ventricular contraction.

    A 58-year-old man with an ischemic cardiomyopathy underwent ICD implantation after having an electrophysiological study positive for inducible, sustained monomorphic VT. Approximately 1 week later he experienced a shock. Inspection of stored electrograms revealed that a run of nonsustained VT had initiated his ICD to charge. The episode spontaneously terminated, yet the shock was still delivered during sinus rhythm. Further inspection revealed that a critically timed PVC during the "second look" interval resulted in delivered therapy. Thus, inappropriate ICD therapy can result from causes other than SVT, lead malfunction, or over sensing.
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ranking = 0.14285714285714
keywords = cardiomyopathy
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4/13. A case of cardiomyopathy induced by premature ventricular complexes.

    tachycardia-induced cardiomyopathy is a well-known and reversible condition, but the left ventricular dysfunction caused by frequent isolated premature ventricular complexes (PVCs) has been rarely reported. Apparent dilated cardiomyopathy was resolved in a patient after the focal source of PVCs was eliminated by radiofrequency catheter ablation. echocardiography showed progressive improvement of the abnormal wall motion. Frequent PVCs could be the cause of left ventricular dysfunction in a subset of patients with dilated cardiomyopathy and radiofrequency ablation should be the choice of therapy in those patients.
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ranking = 1
keywords = cardiomyopathy
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5/13. Arrhythmogenic right ventricular cardiomyopathy and sudden cardiac death in young Koreans.

    The aim of this study was to assess the frequency and clinical characteristics of arrhythmogenic right ventricular cardiomyopathy (ARVC) in young victims of sudden cardiac death (SCD). From January 1999 to December 2000, postmortem studies were conducted in 38 cases of SCD (age < or =35 (27 /-7) years old, 26 male) from the Taegu-Kyungpook region of southeastern korea. Cases of sudden infant death syndrome were excluded. The causes of SCD were ARVC in 42%, acute myocardial infarction in 11%, myocarditis in 11%, pulmonary embolism in 8%, hypertrophic cardiomyopathy in 5%, aortic rupture in 3%, aortic stenosis in 3%, and unknown in 18%. The mean age of the 16 ARVC victims was 27 /-5 years and 10 were male. None were competitive athletes, or had been suspected of having cardiovascular disease before death. SCD was not related to vigorous physical or competitive activity and occurred during sleep in 7 cases, during work in 4, during bathing in 2, while driving, praying and eating in 1 case each. ARVC is an important cause of SCD in young people in this area of korea.
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ranking = 13.543996500868
keywords = arrhythmogenic, cardiomyopathy
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6/13. Spontaneous cardiac resynchronization.

    A 73-year-old woman with dilated cardiomyopathy presented with heart failure. The ECG showed sinus rhythm with left bundle branch block, left-axis deviation and prolonged QRS duration and frequent ventricular premature complexes from the left ventricular septal wall were present. Ventricular premature beats had narrower QRS duration than sinus node beats conducted through the His-purkinje fibers consistent with resynchronizing beats. The mechanisms of narrowing of the QRS complex produced by premature beats in cases of impaired intra and interventricular conduction are discussed.
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ranking = 0.14285714285714
keywords = cardiomyopathy
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7/13. Premature ventricular contraction-induced concealed mechanical bradycardia and dilated cardiomyopathy:.

    Left ventricular (LV) dysfunction due to frequent isolated premature ventricular contractions (PVCs) has been rarely reported. LV dysfunction and concealed mechanical bradycardia resolved in a patient with idiopathic dilated cardiomyopathy after the focal source of PVCs in the LV was eliminated by radiofrequency ablation (RFA). The patient remained free from PVCs and maintained normal LV function over 36-month follow-up. In a subset of patients with idiopathic dilated cardiomyopathy with frequent isolated PVCs, RFA of the arrhythmic focus restores normal LV function that can be long lasting.
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ranking = 0.85714285714286
keywords = cardiomyopathy
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8/13. Frequent premature ventricular contractions.

    Premature ventricular contractions (PVCs) are considered normal in many circumstances but can act as markers to other cardiac disease such as cardiomyopathy and ischemic heart disease. This case is presented to illustrate frequent PVCs as a marker for serious heart disease.
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ranking = 0.14285714285714
keywords = cardiomyopathy
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9/13. Early repolarization syndrome: is it always benign?

    Early repolarization syndrome is a well-recognized idiopathic electrocardiographic phenomenon characterized by prominent J wave and ST-segment elevation predominantly in left precordial leads. The syndrome shares remarkable cellular, ionic, and electrocardiographic similarities with the brugada syndrome and idiopathic ventricular fibrillation (a variant of the brugada syndrome with ST-segment elevation in inferior leads). Although early repolarization syndrome is considered a benign entity, its arrhythmogenic potential still remains unknown. We report the case of a 39-year-old male with a family history of sudden death and an electrocardiogram consistent with early repolarization syndrome. Diagnostic dilemmas are discussed.
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ranking = 12.686853643725
keywords = arrhythmogenic
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10/13. Transient left ventricular apical ballooning: a review of the literature.

    Transient left ventricular apical ballooning is a newly defined syndrome characterized by sudden onset of chest symptoms, electrocardiographic changes characteristic of myocardial ischemia, transient left ventricular dysfunction-particularly in the apical region, low-grade troponin elevation, and no significant coronary stenosis by angiogram. This syndrome is also referred to as takotsubo cardiomyopathy, "Ampulla" cardiomyopathy, Human Stress cardiomyopathy, and Broken Heart Syndrome. Emergency physicians, family physicians, general internists, and cardiologists may all encounter this syndrome at the point of contact. The similarity to acute coronary syndrome requires all clinicians who may potentially care for these patients to familiarize themselves with this newly recognized disease. We provide a recent case and review the current literature surrounding this syndrome.
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ranking = 0.42857142857143
keywords = cardiomyopathy
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