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Myojo Takuya - - 2012
We describe a case of a myocardial infarction, in which prominent ischemic J waves were documented during recurrent ventricular fibrillation attacks. The patient was referred to our hospital to treat an out-of hospital cardiac arrest. Although the 12-lead electrocardiogram obtained just after the first cardioversion did not show any apparent ...
Welinder Annika - - 2010
We tested whether the "Lund" (LU) electrode-placement system compared to the Mason-Likar (M-L) electrode-placement system would produce waveforms more similar to those of standard electrocardiograms (ECGs) with regard to the QRS axis in the frontal plane and QRS changes of inferior myocardial infarction (MI). We also tested whether LU was ...
Kayrak Mehmet - - 2010
Cardiotoxicity that results from lithium overdose is uncommon and electrocardiographic (ECG) changes are rarely reported. However, some authors have specifically reported the occurrence of ischemic ECG changes due to a lithium overdose. This article describes a case that is demonstrating ECG changes that mimic inferior myocardial infarction during the course ...
Pollonini Luca - - 2012
Remote patient monitoring (RPM) holds great promise for reducing the burden of congestive heart failure (CHF). Improved sensor technology and effective predictive algorithms can anticipate sudden decompensation events. Enhanced telemonitoring systems would promote patient independence and facilitate communication between patients and their physicians. We report the development of a novel ...
Cappato Riccardo - - 2010
QRS-ST changes in the inferior and lateral ECG leads are frequently observed in athletes. Recent studies have suggested a potential arrhythmogenic significance of these findings in the general population. The aim of our study was to investigate whether QRS-ST changes are markers of cardiac arrest (CA) of unexplained cause or ...
Shvilkin Alexei - - 2010
There are no established criteria to differentiate new from old left bundle branch block (LBBB). This complicates management of patients with LBBB and suspected acute coronary syndrome. The purpose of this study was to develop electrocardiographic (ECG) criteria to differentiate new and old LBBB. All LBBB tracings (n = 3,706) ...
Zhang Zhu-ming - - 2010
Electrocardiographic (ECG) Q- and ST-T-wave abnormalities predict coronary heart disease (CHD) and total mortality. No comparison has been made of the classification of these abnormalities by the 2 most widely used ECG coding systems for epidemiologic studies-the Minnesota Code (MC) and Novacode (NC). We evaluated 12-lead electrocardiograms from 64,597 participants ...
Sanoski Cynthia A - - 2010
PURPOSE: To review the components and interpretation of the 12-lead electrocardiogram (ECG) and compare and contrast the ECG waveforms and clinical presentation associated with major cardiac arrhythmias. SUMMARY: A 12-lead ECG reflects the electrical activity of the heart from many different perspectives, and individual leads may reveal conduction disturbances and ...
Kim Won Young - - 2010
It is important to analyze right-sided chest electrocardiograms (ECGs) to rule out combined right ventricular infarction in patients with inferior wall infarction. However, the patterns of right-sided chest ECGs in healthy adults have not been thoroughly investigated. This study was conducted to analyze the normal patterns of ECGs and the ...
Wang Wei - - 2010
Congenital diverticulum of the ventricle is a rare disease, but most cases of congenital left ventricular diverticula are asymptomatic. We present a child with congenital left ventricular diverticulum whose routine electrocardiographic examination showed T-wave inversion in inferior and V4 to V6 leads. He was successfully repaired surgically.
Oresko Joseph J - - 2010
Cardiovascular disease (CVD) is the single leading cause of global mortality and is projected to remain so. Cardiac arrhythmia is a very common type of CVD and may indicate an increased risk of stroke or sudden cardiac death. The ECG is the most widely adopted clinical tool to diagnose and ...
Carey Mary G - - 2010
Infarct volume independently predicts cardiovascular events. Fragmented QRS complexes (fQRS) may complement Q waves for identifying infarction; however, their utility in advanced coronary disease is unknown. We tested whether fQRS could improve the electrocardiographic prediction of infarct volume by positron emission tomography in 138 patients with ischemic cardiomyopathy (ejection fraction, ...
Katsuno Tetsuya - - 2010
BACKGROUND: An abnormal Q wave is usually defined as an initial depression of the QRS complex having a duration of > or =40 ms and amplitude exceeding 25% of the following R wave in any contiguous leads on the 12-lead electrocardiogram (ECG). However, much smaller Q waves are sometimes recorded ...
Kireyev Dmitriy - - 2010
BACKGROUND: Several studies suggest that electrocardiographers tend to neglect lead aVR during the reading of electrocardiograms (ECGs). Our objective was to provide a systematic review of the most important diagnostic and prognostic uses of lead aVR. METHODS: We performed a thorough review of the literature about the lead aVR using ...
Yan Su-hua - - 2010
OBJECTIVES: To investigate the value of changes in P wave morphology and duration detected by surface electrocardiogram (ECG) during proximal coronary sinus (PCS) and low lateral right atrial (LLRA) stimulation as a marker for complete bidirectional isthmus conduction block in the procedure of typical atrial flutter ablation. METHODS: Morphology, duration, ...
Kurokawa Sayaka - - 2010
Although bepridil is a useful anti-arrhythmic agent for atrial fibrillation, the appearance of serious ventricular arrhythmia, such as torsades de pointes, might be a problem. In this study, T-U wave morphology was evaluated during bepridil therapy and was examined as a predictor of ventricular arrhythmic events. The study population consisted ...
Sheridan Paul J - - 2010
OBJECTIVE: The aim of this study was to compare the rate-dependent measures of repolarization in patients with and without inducible ventricular arrhythmias, and so to assess the potential arrhythmogenic role of rate-dependent heterogeneities in cardiac repolarization. METHODS: Two groups of patients were studied during invasive electrophysiological procedures for standard clinical ...
Wess G - - 2010
BACKGROUND: Ventricular premature contractions (VPCs) are common in the occult stage of cardiomyopathy in Doberman Pinschers. Although the gold standard for detecting arrhythmia is the 24-hour ambulatory electrocardiography (ECG) (Holter), this method is more expensive, time-consuming and often not as readily available as common ECG. OBJECTIVES: Comparison of 5-minute ECGs ...
Burattini Laura - - 2010
Enhanced modified moving average method (EMMAM) and correlation method (CM) for microvolt TWA identification are compared by aid of simulated ECG tracings (cases of absence of TWA and presence of stationary or time-varying TWA) and ECG recordings from healthy subjects (H-group) and patients who survived an acute myocardial infarction (AMI-group). ...
Samol Alexander - - 2010
AIM: The aim of this study was to investigate whether interventricular asynchrony (IVA) can be measured by electrocardiography. METHODS: Sixty-two patients (New York Heart Association heart failure functional class III: age, mean +/- SD: 64 +/- 9 years; ejection fraction, mean +/- SD: 24% +/- 8%; dilative cardiomyopathy/ischemic cardiomyopathy, n ...
Holmqvist Fredrik - - 2010
BACKGROUND: Several ECG-based approaches have been shown to add value when risk-stratifying patients with congestive heart failure, but little attention has been paid to the prognostic value of abnormal atrial depolarization in this context. The aim of this study was to noninvasively analyze the atrial depolarization phase to identify markers ...
Chauhan Krati - - 2010
Takotsubo cardiomyopathy (TCM) is a unique cardiomyopathy characterized by chest pain, ECG, and regional wall motion abnormalities closely mimicking acute myocardial infarction, in the absence of significant coronary artery disease. Classic ECG changes of TCM include ST elevation or T wave inversion. However, ECG abnormalities of TCM in patients with ...
Yagihara Nobue - - 2010
A 75-year-old man was admitted to our hospital in January 2010 for evaluation of syncope and abnormal ECG. ECG showed type 1 ST elevation in lead V(1) and he was diagnosed as Brugada syndrome. During cardiac catheterization, baseline coronary angiography was normal, but intracoronary ergonovine maleate induced spasms of the ...
Das Mithilesh K - - 2010
PURPOSE OF REVIEW: Several invasive and noninvasive tests for risk stratification of sudden cardiac death (SCD) have been studied. Tests such as microwave T wave alternans (repolarization abnormality) and signal-averaged ECG (depolarization abnormality) have high negative predictive values but low positive predictive values in patients with heart disease. The presence ...
Ficili Sabina - - 2010
A 48-year-old man with an episode of syncope and family history of sudden cardiac death was evaluated. The ECG showed negative T waves from V1 to V3 with evidence of epsilon-wave. Magnetic resonance imaging showed replacement with fibrofatty tissue in midapical regions of free wall of the right ventricle with ...
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 ...
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