Search Results
Results 351 - 400 of 1033
< 3 4 5 6 7 8 9 10 11 12 13 >
de Souza Dilma - - 2007
BACKGROUND: Hypothermia is defined as a condition in which core temperature (rectal, esophageal, or tympanic) reaches values below 35 degrees C. This may be accidental, metabolic, or therapeutic. The accidental form is frequent in cold-climate countries and rare in those with tropical or subtropical climate. The aim of this study ...
Paavonen Kristian J - - 2007
BACKGROUND: The most prevalent LQT1 form of inherited long QT syndrome is caused by mutations of the KCNQ1 gene resulting repolarizing I(Ks) potassium current to decrease and the QT interval to prolong. As abrupt sympathetic activation triggers ventricular arrhythmias that may cause syncopal attacks and sudden death in LQT1 patients, ...
Ono Takuya - - 2006
BACKGROUND: Total cosine R-to-T (TCRT) is a descriptor of T-wave morphology analysis based on singular value decomposition of 12-lead electrocardiograms (ECGs), which is useful in risk stratification of patients with myocardial infarction (MI). A new marker of standard ECG substituted for TCRT is proposed and the aim of this study ...
Veltmann Christian - - 2006
AIMS: Fluctuations between the diagnostic ECG pattern and non-diagnostic ECGs in patients with Brugada syndrome are known, but systematic studies are lacking. The purpose of this study was to prospectively evaluate the spontaneous ECG changes between diagnostic and non-diagnostic ECG patterns in patients diagnosed with Brugada syndrome. METHODS AND RESULTS: ...
Goldberger Jeffrey J - - 2006
OBJECTIVES: We sought to evaluate whether statins were associated with a survival benefit and significant attenuation in life-threatening arrhythmias in patients with nonischemic dilated cardiomyopathy. BACKGROUND: Statins are associated with a reduction in appropriate implantable cardioverter-defibrillator (ICD) therapy in patients with coronary artery disease and improved clinical status in nonischemic ...
Nikus Kjell C - - 2006
The prognosis of high-risk patients with non-ST-elevation acute coronary syndrome can be improved by invasive therapy. Taking into account the large number of patients with symptoms suggestive of acute coronary syndrome, the heterogeneity of the population and the increased risk of events shortly after the onset of symptoms, a strategy ...
Mizumaki Koichi - - 2006
BACKGROUND: In patients with Brugada syndrome (BS), ventricular fibrillation (VF) occurs mainly during sleep; therefore, not only vagal activity but also bradycardia dependent changes in ECG may relate to the nighttime occurrence of VF. The present study aimed to examine the difference in bradycardia-dependent changes in the ECG of symptomatic ...
Tatsumi Hiroaki - - 2006
INTRODUCTION: Risk stratification between symptomatic and asymptomatic patients with Brugada syndrome is not yet established. We compared daily fluctuations in 12-lead electrocardiogram (ECG) and signal-averaged ECG (SAECG) characteristics between symptomatic and asymptomatic patients with Brugada syndrome to identify new markers for distinguishing between high- and low-risk patients. METHODS AND RESULTS: ...
Chalil Shajil - - 2006
OBJECTIVES: This study was designed to determine whether cardiac resynchronization therapy (CRT) by means of biventricular pacing (BiVP) alters the QT interval (QT(c)) and QT dispersion (QTD), and whether such changes relate to the risk of developing major arrhythmic events (MAE). BACKGROUND: Prolonged QT(c) is associated with MAE. Left ventricular ...
Sechtem U - - 2007
For a number of patients it is difficult to diagnose the cause of cardiac disease. In such patients cardiac magnetic resonance is useful for helping to make a differential diagnosis between ischaemic and dilated cardiomyopathy; identifying patients with myocarditis; diagnosing cardiac involvement in sarcoidosis and Chagas' disease; identifying patients with ...
Kiès Philippine - - 2006
INTRODUCTION: Diagnosis of arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is based on a set of criteria proposed by the International Task Force (TF) for Cardiomyopathies in 1994. To fulfill these criteria, presence of both electrocardiographic and anatomical abnormalities must be assessed with ECG and imaging techniques, respectively. This may be difficult ...
Kim Hyungseop - - 2006
BACKGROUND: Ventricular fibrillation (VF) and sudden death (SD) may occur in patients with ST-segment elevation in the right precordial leads. The mechanism of such events is unclear, so the aim of the present study was to assess whether there is an underlying morphological or pathological abnormality in these patients. METHODS ...
Kosuge Masami - - 2006
BACKGROUND: The significance of inverted T waves remains unclear in patients with acute pulmonary embolism (PE). METHODS AND RESULTS: The relationship of the number of leads with inverted T waves to the severity of PE in 40 patients with acute PE was studied. Patients were classified into 3 groups according ...
Lorsheyd Anouk - - 2006
Isolated left ventricular non-compaction cardiomyopathy (LVNC) may have an autosomal dominant or X-linked recessive inheritance. We focus on the familial occurrence of LVNC after misdiagnosing this disorder in symptomatic patients in two families. After identification of the index patient we studied the families more intensively in order to unmask affected ...
Russo Vincenzo - - 2006
The authors present a case of an elderly patient with idiopathic dilated cardiomyopathy who developed a significative prolongation of the QT interval after two days of treatment with azithromycin for a community-acquired pneumonia. QT prolongation is associated with a high risk of serious ventricular tachyarrhythmias. Three days after discontinuation of ...
Pieroni Maurizio - - 2006
We sought to identify echocardiographic hallmarks of Fabry's disease cardiomyopathy (FC). The recognition of FC from other forms of left ventricular hypertrophy (LVH) by noninvasive imaging techniques is not yet available, and diagnosis, mostly in the absence of systemic manifestations, still relies on genetic and invasive studies. Forty consecutive patients ...
Haghi Dariusch - - 2006
OBJECTIVE: Diagnosis of Takotsubo cardiomyopathy (also known as stress cardiomyopathy or acute left ventricular apical ballooning syndrome) can be challenging in patients who are being treated for other diseases in the intensive care unit, because symptoms could erroneously be attributed to the underlying disease or patients may not experience symptoms ...
Ariyarajah Vignendra - - 2006
BACKGROUND: Interatrial block (IAB; P waves >/= 110 milliseconds), the conduction delay between the right (RA) and left atrium (LA), is depicted on the electrocardiogram (ECG) as prolonged, often bifid ("notched"), P waves with distinguishable RA and LA components. Although electrophysiologic (EP) studies give some insight on how RA and ...
Ryerson Lindsay M - - 2006
OBJECTIVES: The present study determined the prevalence of dilated cardiomyopathy together with prolonged corrected QT (QTc) intervals in children. The study also examined whether an association exists between prolonged QTc intervals and ventricular dysrhythmia in a patient cohort with dilated cardiomyopathy. BACKGROUND: The morbidity and mortality for pediatric patients with ...
Rashba Eric J - - 2006
BACKGROUND: The recent expansion of indications for prophylactic implantable cardioverter-defibrillator (ICD) placement in subjects with nonischemic dilated cardiomyopathy has raised concerns about the cost-effectiveness of this therapy. OBJECTIVES: The purpose of this study was to identify low-risk patients with nonischemic dilated cardiomyopathy who may not require prophylactic ICD placement. METHODS: ...
Kawaguchi Takashi - - 2006
The degree of ST-segment elevation and amplitude of J waves, which may change in patients with the Brugada-type electrocardiogram (ECG) over time, are influenced by autonomic nervous activity and the administration of antiarrhythmic drugs. In the present study, we evaluated whether the shape of ST-segment elevation in patients with a ...
Maramattom Boby V BV Department of Neurology and Division of Critical Care Neurology, Mayo Clinic College of Medicine, Rochester, MN 55905, - - 2006
To determine the Incidence of cardiac troponin T (cTnT) elevation, electrocardiographic (ECG) changes, and arrhythmias in supratentorial intracerebral hemorrhage (ICH) and their association with early mortality. Patients with supratentorial ICHs admitted to Mayo Clinic, Rochester, Minn, from March 1998 to October 2003 were studied. We excluded moribund patients with ICHs ...
Vernooy Kevin K Cardiovascular Research Institute Maastricht, Maastricht, The - - 2006
The occurrence of metabolic acidosis, rhabdomyolysis, hyperkalemia, and sudden cardiac death after long-term, high-dose propofol infusion has been referred to as propofol infusion syndrome (PRIS). The purpose of this study was to explore the ECG abnormalities observed in a patient with PRIS in order to identify possible pathophysiologic mechanisms of ...
Auer Johann - - 2006
The syndrome of "apical ballooning" consists of an acute onset of transient extensive akinesia of the apical portion of the left ventricle, without significant stenosis on the coronary angiogram, accompanied by chest symptoms, ECG changes, and a limited release of cardiac markers disproportionate to the extent of akinesia. So far, ...
Monteban-Kooistra Wilma E - - 2006
OBJECTIVE: The Brugada syndrome is a clinical and electrocardiographic familial entity, which may lead to sudden cardiac death. A Brugada pattern ECG may occasionally be caused by conditions such as an overdose of tricyclic antidepressants (TCA). Toxicity of TCA frequently results in the need for critical care support. We retrospectively ...
Facchini Mario - - 2006
BACKGROUND: QT prolongation and ventricular arrhythmia have been proposed as the mechanism for sudden death in anorexia nervosa. The prevalence and the cause of QT prolongation remain controversial. OBJECTIVES: 1) to evaluate ventricular repolarization in patients with anorexia; 2) to evaluate factors that may influence repolarization, with focus on electrolyte ...
Diercks Deborah B - - 2006
OBJECTIVE: To describe time to electrocardiogram (ECG) acquisition, identify factors associated with timely acquisition, and evaluate the influence of time to ECG on adverse clinical outcomes. METHODS: We measured the door-to-ECG time for emergency department patients enrolled in prospective chest pain registry. Clinical outcomes were defined as occurrence of myocardial ...
Takayama Hideo - - 2006
BACKGROUND: Hypertrophic cardiomyopathy (HCM) is thought to have a microvolt-level electrical disarrangement in the myocardium that leads to ventricular tachyarrhythmias and sudden cardiac death. Although signal-averaged electrocardiography (ECG) has been used to detect late potential as a parameter of electrical instability, its predictability is not high. The focus of the ...
Familoni O B OB Department of Medicine, Olabisi Onabanjo University Teaching Hospital, Sagamu, - - 2006
Cardiovascular complications and sudden cardiac death are common in patients with chronic kidney disease and those on haemodialysis. This is often associated with prolonged QT(c) and QT(c) dispersion intervals. Forty-two patients on haemodialysis were compared with 45 control subjects to study the effect of haemodialysis on these ECG parameters and ...
Apt W - - 2005
Eleven years after they had been given itraconazole or allopurinol for the treatment of chronic American trypanosomiasis, 109 adult patients were checked for electrocardiographic abnormalities and evidence of Trypanosoma cruzi infection. The parasitological investigations included xenodiagnosis, in which the faeces of Triatoma infestans that had fed on the patients were ...
Chau Elaine M C - - 2006
Fulminant myocarditis may be rapidly fatal with severe haemodynamic compromise in previously healthy patients. We reviewed our experience with eight cases of biopsy-proven fulminant myocarditis (seven cases with lymphocytic myocarditis and one with eosinophilic myocarditis). Immunosuppression was given in seven out of eight cases. Mechanical circulatory support was required in ...
Christensen D D - - 2005
Our recent experience indicates that patients with a hemodynamically significant atrial septal defect secundum (ASD2) do not necessarily present with classic physical and electrocardiographic (ECG) findings. The purpose of the study was to review the records of patients either receiving a catheter device or undergoing surgical repair for the closure ...
Cecchi Franco - - 2005
BACKGROUND: National registries are advocated as instrumental to the solution of rarity-related problems for patients with hypertrophic cardiomyopathy (HCM), including limited access to advanced treatment options. Thus, an Italian Registry for HCM was created to assess the clinical profile and the level of care nationwide of patients with HCM. METHODS: ...
Mackin Paul - - 2005
BACKGROUND: Antipsychotic drugs have been associated with prolongation of the QTc interval on the electrocardiogram, and QTc prolongation is, in turn, associated with an increased risk of cardiac arrhythmias and sudden death. Antipsychotic polypharmacy has been implicated in reduced survival, possibly secondary to cardiotoxic effects of antipsychotic medication. Abnormalities of ...
Bischiniotis Theodoros - - 2005
Although malignant melanoma has a great propensity (38-50%) for cardiac involvement, as indicated by autopsy findings, cardiac metastases are rarely identified ante-mortem. The aim of this study was to record abnormal electrocardiographic and echocardiographic findings in patients with malignant melanoma. One hundred and eighty-five consecutive patients (male/female, 99/86; mean age, ...
Maffei Pietro - - 2005
BACKGROUND: Sudden death and increased prevalence of ventricular arrhythmias have already been described in acromegaly. Although late potentials (LPs) have been proved to be a new technique in detecting patients at risk for ventricular tachyarrhythmias its use in acromegaly is still unknown. METHODS: We studied 70 acromegalic patients [32 males, ...
Biagini Elena - - 2005
OBJECTIVES: This study sought to investigate the incidence, risk factors, and prognosis of dilated-hypokinetic evolution in a large cohort of patients with hypertrophic cardiomyopathy (HCM) followed up at a cardiology center serving both the pediatric and the adult population. BACKGROUND: The available data on this evolution of HCM mainly regards ...
Haghjoo Majid - - 2005
Clinical and electrophysiologic characteristics of 20 patients (15 males; mean age, 42 +/- 9 years) with Brugada syndrome were studied. Electrocardiographic abnormalities (spontaneous in 6 and provoked in 14) were recognized in 5 symptomatic and 15 asymptomatic patients. Mean PR (188 +/- 18 vs. 184 +/- 24 ms) and QT ...
Kosutic J - - 2005
Heart involvement in patients with Friedreich ataxia (FRDA) is a condition marked by inevitable progressive deterioration, with premature death. There is currently no specific treatment for FRDA. Recently, a therapy with idebenone, a short-chain coenzyme Q10 analogue, was reported to reduce left ventricular mass by 20% in about half of ...
Raizada Veena - - 2005
BACKGROUND: Polymorphisms of renin-angiotensin system (RAS) genes in patients with end-stage renal disease (ESRD) on chronic hemodialysis may be associated with QTc interval prolongation, leading to fatal arrhythmias. The objective of this study was to determine (1) the prevalence of QTc prolongation in hemodialysis patients, and (2) the association of ...
Chow Clara Kayei - - 2005
BACKGROUND: Investigation for cardiac source of embolus (CSE) is one of the commonest referrals for transthoracic echocardiography (TTE) of hospital inpatients, but has a relatively low-diagnostic yield. We sort to investigate whether 12-lead ECG might be useful in screening patients to obviate the need for TTE, in a subset of ...
Viskin Sami S Department of Cardiology, Tel-Aviv Sourasky Medical Center, Sackler-School of Medicine, Tel Aviv University, Weizman 6, Tel Aviv 64239, Israel. - - 2006
As arrhythmias in the long QT syndrome (LQTS) are triggered by heart rate deceleration or acceleration, we speculated that the sudden bradycardia and subsequent tachycardia that follow adenosine injection would unravel QT changes of diagnostic value in patients with LQTS. Patients (18 LQTS and 20 controls) received intravenous adenosine during ...
Roche Frédéric - - 2005
BACKGROUND: QT rate dependence is one of the major properties of ventricular repolarization, with its circadian and autonomic modulations. The alteration of cardiac autonomic tone occurring in obstructive sleep apnea syndrome (OSAS) patients could explain the altered rate-dependent adaptation of the myocardial repolarization. Thus, we postulated that dynamic alterations in ...
Montgomery Julia V - - 2005
Twelve-lead electrocardiography, a traditional component in evaluations of patients with hypertrophic cardiomyopathy (HC), is often regarded as a marker for the magnitude of left ventricular (LV) hypertrophy, which in turn has been linked to sudden death risk. To determine whether electrocardiographic (ECG) patterns have clinical utility by accurately reflecting phenotypic ...
Wong Cheuk-Kit - - 2005
OBJECTIVES: The purpose of this research was to examine the prognostic value of ST-segment changes (concordant ST-segment elevation and/or precordial V1 to V3 ST-segment depression) during presumed-new left bundle branch block (LBBB) in patients receiving fibrinolytic therapy. BACKGROUND: These patients are often considered high-risk, but their outcome is not well-defined. ...
Madias John E - - 2005
BACKGROUND: Increase in the amplitude of electrocardiogram (ECG) QRS complexes has been observed in patients treated for heart failure (HF), but the underlying mechanism has not been delineated. Also, correlation of augmentation of the QRS potentials with loss of weight has been noted in patients recovering from anasarca of varying ...
Dulu Alina - - 2005
OBJECTIVE: To report the development of the Brugada electrocardiographic (ECG) pattern in the immediate postoperative setting. DESIGN: Case report. SETTING: Postanesthesia care unit at Memorial Sloan-Kettering Cancer Center. PATIENT: A 51-yr-old white male who developed new ST-segment elevation in leads V(1)-V(3) typical of the ECG changes of the Brugada syndrome ...
Wathen Joe E - - 2005
STUDY OBJECTIVE: We assess accuracy of ECG interpretation and indications for obtaining ECGs and develop a clinical classification system of ECG abnormalities. METHODS: Prospectively acquired ECG data on patients 0 to 21 years of age and presenting to our pediatric emergency department (ED) were obtained. Clinical indications were documented. The ...
Corrado Domenico - - 2005
BACKGROUND: Three-dimensional electroanatomic voltage mapping offers the potential to identify low-voltage areas that correspond to regions of right ventricular (RV) myocardial loss and fibrofatty replacement in patients with arrhythmogenic RV cardiomyopathy/dysplasia (ARVC/D). METHODS AND RESULTS: Thirty-one consecutive patients (22 men and 9 women; mean age, 30.8+/-7 years) who fulfilled the ...
Klingenheben Thomas - - 2005
INTRODUCTION: T-wave alternans has been shown to be linked to the genesis of ventricular tachyarrhythmias. Currently, only qualitative assessment of microvolt T-wave alternans (MTWA) is recommended in clinical practise. Whether quantitative assessment of MTWA yields complementary information is unknown. METHODS AND RESULTS: Noninvasive MTWA determination was performed in 204 consecutive ...
< 3 4 5 6 7 8 9 10 11 12 13 >