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Results 751 - 800 of 2035
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Harata Shuji - - 2010
AIMS: Identification of arrhythmogenic pulmonary veins (PVs) initiating atrial fibrillation is helpful for catheter ablation. The aim of this study was to examine the possibility to recognize the arrhythmogenic PV using Holter ECG. METHODS AND RESULTS: In 20 patients, P-wave characteristics were studied during pacing from four PVs. Holter ECG ...
Zhao Zhao - - 2010
To evaluate the changes in Tp-e interval (an interval from the peak to the end of the T wave), QT interval and Tp-e/QT ratio of the body surface ECG in patients with left ventricular hypertrophy (LVH). The Tp-e interval and QT interval were measured on body surface ECGs in 42 ...
Jevon Phil - - 2010
The aim of this paper is to provide an introduction to electrocardiogram (ECG) monitoring. The objectives are to: define an ECG; describe how the ECG relates to cardiac contraction, with specific reference to the conduction system of the heart; recognize sinus rhythm; list the indications for ECG monitoring; discuss the ...
Schlegel Todd T - - 2010
Resting conventional 12-lead ECG has low sensitivity for detection of coronary artery disease (CAD) and left ventricular hypertrophy (LVH) and low positive predictive value (PPV) for prediction of left ventricular systolic dysfunction (LVSD). We hypothesized that a approximately 5-min resting 12-lead advanced ECG test ("A-ECG") that combined results from both ...
Yamada Takumi - - 2010
An 83-year-old man underwent electrophysiological testing for focal atrial tachycardia (AT) exhibiting narrow P waves with negative deflections in the inferior leads. Catheter ablation at the cavo-tricuspid isthmus (CTI) successfully eliminated the AT. The propagation map during AT and pacing study from the successful ablation site demonstrated that the atrial ...
George Anil - - 2010
Electrocardiography continues to be a focal point of modern medicine, and the electrocardiogram (ECG) continues to be the most frequently ordered cardiac test. Most of the clinical importance of the ECG rests on the invaluable information it renders in diagnosing acute coronary syndromes and cardiac arrhythmias. However, the ECG is ...
Shalia Kavita K - - 2010
The study aimed to analyze the circulating levels of thrombotic and haemostatic components; tissue factor, tissue factor pathway inhibitor, tissue plasminogen activator and plasminogen activator inhibitor-1 in patients with acute myocardial infarction at presentation (Group 1, n=49), unstable angina and Non-ST elevated MI after treatment (Group 2, n=22), stable angina ...
Mochly-Rosen Daria - - 2010
Although heavy alcohol consumption has deleterious effects on heart health, moderate drinking is thought to have cardioprotective effects, reducing the risk of coronary artery disease and improving prognosis after a myocardial infarction. It still is unclear, however, if this effect can be achieved with all types of alcoholic beverages and ...
Kawai Kunio K Kouno Clinic, Fukui, Japan. - - 2010
Kawasaki disease (KD) causes systemic vasculitis and coronary aneurysms. It frequently results in electrocardiographic (ECG) abnormalities of short duration. Cardiac sequelae persist beyond the acute stage in a few patients. There are many areas to be investigated concerning the effects on the vascular system of patients suffering from KD and ...
La Rocca Roberto - - 2011
Electrocardiographic changes mimicking an acute coronary event with T-wave inversion have been reported in the resting electrocardiogram in patients without ischemic heart disease but with acute ischemic stroke, or subarachnoid hemorrhage, or intracerebral hemorrhage, or a severe head injury. We present a case of T-wave inversion in a 73-year-old Italian ...
Pala Selcuk - - 2010
BACKGROUND: Atrial electromechanical delay (AEMD) calculated from tissue Doppler imaging (TDI) echocardiography can be an alternative to invasive electrophysiologic studies. We investigated whether the AEMD obtained from TDI is prolonged in patients with nonischemic dilated cardiomyopathy (DCM). METHODS: Fifty-five patients with nonischemic DCM (23 men/32 women; age, 43.9 +/- 14.8 ...
Bhakta Shyam - - 2009
Myocardial stunning, known as stress cardiomyopathy, broken-heart syndrome, transient left ventricular apical ballooning, and Takotsubo cardiomyopathy, has been reported after many extracardiac stressors, but not following chemotherapy. We report 2 cases with characteristic electrocardiographic and echocardiographic features following combined modality therapy with combretastatin, a vascular-disrupting agent being studied for treatment ...
T?rkay Cansel - - 2009
Acute pancreatitis has frequently been reported to be associated with transient electrocardiography changes mimicking myocardial infarction despite normal epicardial coronary arteries. Although the origin of these findings is poorly understood, suggested mechanisms have included electrolyte abnormalities, a vagally mediated reflex, coronary vasospasm, and myonecrosis because of the release of pancreatic ...
Genzlinger Michele A - - 2012
Background: Hyperacute T waves and the non-concave appearance of the ST segment are early changes that may be seen on the electrocardiogram (ECG) in an acute myocardial infarction (AMI) patient. There are specific morphological changes in these ECG findings that can help distinguish them from other conditions with similar ECG ...
Nikus Kjell - - 2010
The electrocardiogram (ECG) remains the most immediately accessible and widely used diagnostic tool for guiding emergency treatment strategies. The ECG recorded during acute myocardial ischemia is of diagnostic, therapeutic, and prognostic significance. In patients with myocardial ischemia as a result of decreased blood supply, the initial 12-lead ECG typically shows ...
Gordon David - - 2010
Cardiac electrical alternans have been associated with spontaneous ventricular arrhythmias during myocardial ischemia. The study aims were to use a new algorithm to measure depolarization and repolarization alternans from epicardial electrograms in an ischemia model and to evaluate which features are predictive of ventricular fibrillation (VF). The left anterior descending ...
Miyachi Hideki - - 2010
The prevalence of coronary artery disease (CAD) in patients with peripheral arterial disease (PAD) approaches 50%. The incidence of perioperative cardiac complications is high in patients undergoing peripheral vascular surgery (PVS). However, the long-term efficacy of coronary artery revascularization in patients with PAD prior to PVS remains controversial. We retrospectively ...
Ostman-Smith Ingegerd - - 2010
Assessment of ECG-features as predictors of sudden death in adults with hypertrophic cardiomyopathy (HCM). ECG-amplitude sums were measured in 44 normals, 34 athletes, a hospital-cohort of 87 HCM-patients, and 29 HCM-patients with sudden death or cardiac arrest (HCM-CA). HCM-patients with sudden death or cardiac arrest had substantially higher ECG-amplitudes than ...
Kraaier Karin - - 2010
BACKGROUND: Myocardial scar is an anatomic substrate for potentially lethal arrhythmias. Recent study showed that higher QRS-estimated scar size using the Selvester QRS score was associated with increased arrhythmogenesis during electrophysiologic testing. Therefore, QRS scoring might play a potential role in risk stratification before implantable cardioverter defibrillator (ICD) implantation. In ...
S??rensen Jacob Thorsted - - 2009
BACKGROUND: Peri-interventional T-wave changes may reflect the microvascular reperfusion status and potentially carry early independent, prognostic information in patients with ST-elevation myocardial infarction (STEMI) treated with primary percutaneous coronary intervention (PCI). METHODS: The first available electrocardiogram (ECG) (index ECG) and the ECG recorded immediately post-PCI were analyzed for T-wave morphology ...
Voulgari Christina - - 2009
The concept of the ventricular gradient (VG) was conceived in the 1930s and its calculation yielded information that was not otherwise obtainable. The VG was not utilized by clinicians at large because it was not easy to understand and its computation time-consuming. Spatial vectorcardiography is based on the concept of ...
Taneja Anil Kumar - - 2010
Controversy exists regarding the significance of pathological 'Q' waves on electrocardiography (ECG) following established acute myocardial infarction (AMI) in predicting non-viable myocardium. The aim of the study was to ascertain the reliability of 'Q' waves on ECG to predict myocardial viability following AMI. 176 patients underwent both ECG and DSE, ...
Huang Hui-Chun - - 2009
AIMS: The objective was to investigate the prognostic value of T-wave morphology in systolic heart failure patients. T-wave morphology descriptors on standard 12-lead electrocardiograms (ECG) have been shown to have prognostic importance concerning the arrhythmic susceptibility of patients with previous myocardial infarction. However, these descriptors have not been considered with ...
Homsi Mohamed - - 2009
BACKGROUND: Fragmented QRS complexes (fQRS) on a 12-lead ECG are a marker of myocardial scar in patients with coronary artery disease. Cardiac sarcoidosis is also associated with myocardial granuloma formation and scarring. We evaluated the significance of fQRS on a 12-lead ECG compared to Gadolinium-delayed enhancement images (GDE) in cardiac ...
Kumar Saurabh - - 2009
Q waves can develop early in infarction and indicate infarct progression better than symptom duration. ST resolution (STR) is a predictor of reperfusion success. Our aim was to assess the prognostic impact of Q waves on presentation and STR after primary percutaneous coronary intervention (PPCI) for ST-elevation myocardial infarction. The ...
Lin Yen-Hung - - 2009
BACKGROUND: Whether T-wave morphology descriptors on the 12-lead electrocardiogram (ECG) can predict the occurrence of life-threatening ventricular arrhythmia in patients with advanced congestive heart failure is unclear. METHODS: Standard 12-lead ECGs were photoscanned and digitized for analysis in 27 heart failure patients with ventricular tachycardia/ventricular fibrillation (VT/VF; study group), as ...
Schmied C - - 2009
OBJECTIVES: To screen all players registered for the 8th CAF African Under-17 Championship for risk factors of sudden cardiac death. DESIGN: Standardised cardiac evaluation prior to the start of the competition. STUDY POPULATION: 155 male football players from all eight qualified teams; mean age 16.4 (SD 0.68) years (range 14 ...
Mead Nicole E - - 2009
Wellen's syndrome is a characteristic T-wave on an electrocardiogram during a pain-free period in a patient with intermittent chest pain. This finding suggests a high-degree stenosis of the proximal left anterior descending (LAD) coronary artery that will soon result in an acute anterior wall myocardial infarction (MI) if the patient ...
Chen-Scarabelli Carol - - 2009
This article presents a case report of a 74-year-old man with T-wave inversion (TwI) in atrial fibrillation noted during routine pacemaker interrogation. The patient was seen for routine pacemaker interrogation, at which time he was noted to have underlying atrial fibrillation. A12-lead electrocardiogram of the atrial fibrillation revealed significant TwIs. ...
Morita Hiroshi - - 2009
Brugada syndrome (BrS), caused by ion channel abnormalities, is characterized by ST segment elevation and negative T waves in the right precordial electrocardiographic (ECG) leads recorded over the right ventricular outflow tract (RVOT). BrS is sensitive to body temperature and can lead to T-wave alternans (TWA), ventricular tachycardia, and sudden ...
Corrado D - - 2009
Participation in sports activity and regular physical training is associated with physiological structural and electrical changes in the heart (athlete's heart) that enable sustained increases in cardiac output for prolonged periods. Cardiovascular remodelling in the conditioned athlete is often associated with ECG changes. In rare cases, abnormalities of an athlete's ...
Stec Sebastian - - 2010
We report a novel technique for diagnosing a new cause of esophageal dysphagia in a patient without organic heart and esophageal disease. A coincidence between intermittent esophageal dysphagia and cardiac arrhythmia, frequent premature ventricular complexes (PVC) were confirmed by clinical observation, simultaneous ECG monitoring, and motility study. High-resolution esophageal manometry ...
G??ne?? Yilmaz - - 2009
OBJECTIVE: Coronary slow flow (CSF) is characterized by delayed opacification of coronary arteries in the absence epicardial occlusive disease. P wave duration and dispersion have been reported to be longer in patients with CSF. Nebivolol, besides its selective beta1-blocking activity, causes an endothelium dependent vasodilatation through nitric oxide release. In ...
Markiewicz-Łoskot Grazyna - - 2009
BACKGROUND: Mitral valve prolapse (MVP) is the most common primary valvular abnormality in a young population. In some individuals, MVP is silent or associated with palpitations, dizziness, chest pain, and abnormal electrocardiogram (ECG) repolarization with or without ventricular arrhythmias. HYPOTHESIS: The aim of the present study was to assess the ...
Salcido David D - - 2009
BACKGROUND: Quantitative measures of the ventricular fibrillation (VF) electrocardiogram (ECG) have been correlated with the success of rescue shocks, making them ideal measures for guiding resuscitative interventions. Correlation of intramyocardial energy stores with the change in quantitative VF ECG measures would provide mechanistic insight into their utility. We sought to ...
Madias John E - - 2009
Attenuation of the QRS voltage (QRSV) in patients with decompensated heart failure (HF) has been known for a long time, but its mechanism has been elusive. In a canine model of HF, QRSV was seen in intracardiac and epicardial electrograms (ECGs), but no surface ECGs were recorded in that study ...
Chiavistelli Patrizio - - 2009
Abnormal ST T-wave changes can be found at presentation in various noncoronary disorders; misinterpretation of these patterns as ischemic heart disease can lead to erroneous diagnosis and treatment. Here we present a case of myasthenia gravis (MG) with thymoma, in which the resting electrocardiogram (ECG) led to a misleading diagnosis ...
Erice B - - 2009
Differences in the diagnostic value of various electrocardiographic (ECG) voltage indices for hypertrophic cardiomyopathy (HCM) are yet to be elucidated. The objective of this study was to examine the strongest predictor within ECG voltage criteria for left ventricular hypertrophy (LVH) in HCM to be applied in cardiovascular examination of young ...
Jayachandran E S - - 2010
Myocardial infarction (MI), is commonly known as a heart attack, occurs when the blood supply to the portion of the heart is blocked causing some heart cells to die. This information is depicted in the elevated ST wave, increased Q wave amplitude and inverted T wave of the electrocardiogram (ECG) ...
Noda Takashi - - 2009
Evaluation of: Sudden cardiac arrest associated with early repolarization. Haiissaguerre M, Derval N, Saccher F et al.: N. Engl. J. Med. 358, 2016-2023 (2008). In patients with idiopathic ventricular fibrillation, several kinds of electrocardiographic findings have been reported. Brugada electrocardiogram (ECG), a coved-type ST-segment elevation in the right precordial leads, ...
Armstrong Paul W - - 2009
OBJECTIVES: We assessed the incremental value of baseline Q waves over time from symptom onset as a marker of clinical outcome in ST-segment elevation myocardial infarction (STEMI). BACKGROUND: Time from symptom onset is a central focus in STEMI patients. The presence of Q waves on the baseline electrocardiogram (ECG) has ...
Kim Han W - - 2009
BACKGROUND: Unrecognized myocardial infarction (UMI) is known to constitute a substantial portion of potentially lethal coronary heart disease. However, the diagnosis of UMI is based on the appearance of incidental Q-waves on 12-lead electrocardiography. Thus, the syndrome of non-Q-wave UMI has not been investigated. Delayed-enhancement cardiovascular magnetic resonance (DE-CMR) can ...
Maliepaard Dirk - - 2009
BACKGROUND: There is no consensus on the monitoring for rare but potentially serious cardiac adverse events associated with cholinesterase inhibitor drugs in the treatment of dementia. Different protocols have been proposed, with and without ECG examination. We surveyed an urban old age psychiatry service to investigate the variables that may ...
van der Vleuten Pieter A - - 2009
DESIGN: The data used for the present study were obtained as part of a clinical trial evaluating the effect of thrombus aspiration after primary percutaneous coronary intervention (PCI). SETTING: The study was conducted at a tertiary referral facility for primary PCI at a University Medical Center Groningen in The Netherlands. ...
Letsas Konstantinos P - - 2009
BACKGROUND: Previous studies have demonstrated a high incidence of atrial tachyarrhythmias (ATs) in patients with Brugada syndrome (BS). The present study aimed to investigate whether various 12-lead electrocardiogram (ECG) and electrophysiological parameters may help to differentiate subjects with a high probability to develop ATs. METHODS AND RESULTS: The clinical records ...
Chandra Preeti A - - 2009
A 70-year-old woman with extensive psychiatric history, including depression and bipolar disorder, and past medical history of mitral valve prolapse repair (3 years ago) was brought in from the psychiatry ward to the emergency department for evaluation of ECG changes following electroconvulsive therapy (ECT). ECG done after the procedure showed ...
Steriotis Alexandros Klavdios - - 2009
Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a cardiac disease characterized by progressive myocardial atrophy and fibrofatty replacement. Standard electrocardiograms (ECGs) and signal-averaged ECGs (SAECGs) were relatively low cost and repeatable diagnostic tools. In this study, ECGs and SAECGs of patients with ARVC were analyzed with the aim to assess the ...
Korhonen Petri - - 2009
AIMS: Heterogeneous ventricular repolarization is associated with sudden cardiac death after myocardial infarction (MI). This prospective study investigated repolarization disparity with parameters based on T-wave morphology in body surface potential mapping (BSPM) in the assessment of arrhythmia risk in patients with a recent MI and cardiac dysfunction. METHODS AND RESULTS: ...
Gorgels Anton P M - - 2009
Recently, an important electrocardiogram picture indicating anterior wall ischemia was discussed, characterized by (1) loss of R wave and (2) not infrequently a notch in the negative limb of the QRS complexes in the precordial leads, combined with (3) ST depression and (4) a tall peaked T wave. An explanation ...
Park Chan Seok - - 2009
Percutaneous coronary intervention for chronic total occlusion lesions is technically difficult despite equipment advances. Changes in electrocardiographic patterns, such as Q and T waves, during chronic total occlusion can provide information about procedural success and myocardial viability. In this study, we investigated clinical, electrocardiographic, and procedural characteristics of chronic total ...
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