electrocardiography

..We sought to determine the prognostic value of the admission electrocardiogram (ECG) in patients with unstable angina and non-Q wave myocardial infarction (MI)...

..Performed urgently to evaluate chest pain, MRI accurately detected a high fraction of patients with acute coronary syndrome, including patients with enzyme-negative unstable angina...

..Taken together, the present data strongly support the concept of using hERG activators as a treatment for certain kinds of arrhythmias and suggest further investigation of this new approach...

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..The SCN5A sodium channel is a major determinant for cardiac impulse propagation. We used epicardial mapping of the atria, ventricles, and septae to investigate conduction velocity (CV) in Scn5a heterozygous young and old mice...

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..Mutations causing "silent" forms of congenital LQTS, in which the patient remains free of arrhythmias until exposed to drugs that further impair repolarisation, are now recognised...

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..Cardiac troponin testing is central to the diagnosis of acute myocardial infarction. We evaluated a sensitive troponin I assay for the early diagnosis and risk stratification of myocardial infarction...

..These results suggest that strategies capable of activating the growth reserve of the myocardium may be important in cardiac repair after ischemic injury...

..Our findings may contribute to future work investigating possible pharmacological treatments for a disease in which the current mainstay of treatment is implantable cardioverter defibrillator implantation...

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..It has been reported recently that early repolarization is associated with idiopathic ventricular fibrillation and the QT interval is short in patients with early repolarization...

..0056). This suggests a role for common variation in ion channel and developmental genes in atrial and atrioventricular conduction as well as in susceptibility to atrial fibrillation...

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..The purpose of this study was to examine whether the combination of two simple tests, electrocardiography (ECG) and serum troponin I (TnI) level, may serve as reliable predictors of BCI or the absence of it.

..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...

..Ventricular arrhythmia is the most common antecedent event before SCD. Examining associations between resting HR and ventricular arrhythmogenesis may enhance our understanding of the association between high resting HR and SCD...

..We aimed to assess interventricular and right-intraventricular dyssynchrony in patients after tetralogy of Fallot (TOF) repair by two-dimensional (2D) speckle tracking and to identify factors associated with dyssynchrony...

To prospectively assess electrocardiography (ECG)-synchronized multi-detector row computed tomography (CT) for the evaluation of right ventricular (RV) function in patients suspected of having pulmonary embolism (PE).

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..Multivariate short-term HRV, analyzed by both linear and nonlinear methods appears to be a suitable pre-diagnostic tool for screening heart disease in primary care settings...

..No clear difference between men and women was found in the nonlinear indexes. Nonlinear indexes decline with age. This can be related to the concept of decreasing autonomic modulation with advancing age...

..However, patients do not benefit from G-CSF when PCI is performed late. Granulocyte colony-stimulating factor results in improved myocardial perfusion of the infarcted area, which may reflect enhanced neovascularization...

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..CONCLUSIONS: Our observations indicate that there may be some relationship between prolonged ventricular recovery time dispersion indices and ventricular fibrillation and sudden cardiac death associated with smoking...

..The syndrome of transient left ventricular apical ballooning could be considered among the causes of long QT syndrome and torsade de pointes...

..as the difference between the minimum (P min) and maximum P-wave (P max) durations on standard 12-lead electrocardiography (ECG). Increase in PD shows the intra-atrial and inter-atrial non-uniform conduction...

..Loss of HRV occurs with increasing OF; this effect was better demonstrated by the model compared with other measures of HRV...

..The present study was designed to compare the acute effects of AVD programming methods during CRT...

..The optimal combination of AV delay and VV interval currently is determined by extensive hemodynamic testing...

..The InSync III study evaluated sequential cardiac resynchronization therapy (CRT) in patients with moderate-to-severe heart failure and prolonged QRS...

..This study illustrates the ability to provide highly beneficial automatic arrhythmia monitoring and is an improvement on previously reported results for automated heartbeat classification systems...

..The aim of this study was to investigate: 1) the differences in QTd between diabetics and non-diabetics; 2) the differences in QTd between those with type 1 and type 2 diabetes; 3) the relation between QTd and CAN...

..Screening for ECG-LVH in diabetic subjects is therefore recommended, particularly in diabetic women...

..We evaluated the association of QT interval corrected for heart rate (QT(c)) and resting heart rate (rHR) with mortality (all-causes, cardiovascular, cardiac, and ischaemic heart disease) in subjects with type 1 and type 2 diabetes...

..Therapeutic measures to prevent SCD are also discussed...

..Concurrent monitoring of respiration and physical activity may enhance HR variability accuracy to predict autonomic control...

..Furthermore, treatment of these patients with beta blockers would appear to decrease the recurrence of exercise-induced AF and to be associated with a decrease in P-wave durations...

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..Hence, this study aimed to use the ethnic distribution of ECG predictors of AF as measures of AF propensity in different ethnic groups...

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..The objective of our study was to evaluate the role of ECG-gated MDCT in the functional evaluation of mechanical prosthetic aortic and mitral valves...

..To evaluate the role of novel biomarkers in early detection of acute myocardial infarction (MI) in patients admitted with acute chest pain...

..Moreover, there seem to be host factors (e.g., cardiovascular disease) that increase vulnerability to triggered arrhythmias regardless of the pollutant or its concentration...

..Clinicians should be aware of these syndromes and realise that drugs, ischaemia, exercise, and emotions can precipitate sudden death in susceptible individuals...

..Functional reentry is the underlying mechanism for arrhythmogenesis associated with an increased T(p-e)/QT ratio...

..To review and evaluate the potential cardiac effects of 5-HT(3) antiemetic treatment in patients who may be predisposed to cardiac complications resulting from malignancy, cytotoxic oncologic regimens, or preexisting comorbid conditions...

..Together, these findings suggest that increased RyR2-dependent Ca2+ leakage due to enhanced CaMKII activity is an important downstream effect of CaMKII in individuals susceptible to AF induction...

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..We investigated how pathologic Q waves or equivalents predict location, size and transmural extent of myocardial infarction (MI)...

..Ambient particulate matter (PM) air pollution is associated with coronary heart disease, but the pathways underlying the association remain to be elucidated...

..The study prospectively evaluated the burden of asymptomatic AF episodes in pacemaker patients (for sick sinus syndrome) with a history of documented paroxysmal AF...

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..However, no previous randomized studies have discussed the association of left atrial size reduction and the improvement of sinus rhythm conversion rate after radiofrequency ablation for continuous AF...

..On electrophysiological study, careful mapping revealed that the regular rhythm actually represented organised slow atrial fibrillation. Circumferential pulmonary vein ablation resulted in the abolition of both arrhythmias...

..8-4.3). In addition, our review discusses electrocardiographic markers of poor outcome that were not independent risk factors on multivariate analysis, conflicting findings, and knowledge gaps that can help plan future research efforts...

..The aim of the study was to estimate the P wave and PQ interval dispersion in patients after the myocardial infarction in dependence on its location and applied fibrynolytical treatment...

..The authors discuss the acute treatment in this clinical situation and the problem of dual antiplatelet therapy in patients with an indication for long-term oral anticoagulation undergoing percutaneous coronary intervention and stenting...

..However, persistent tachyarrhythmias can often be treated successfully with catheter mapping and ablation...

..CONCLUSIONS: In this case-control study, we found no ECG evidence for myocardial infarction or ischemia, conduction disturbances, or arrhythmias in CADASIL patients compared with healthy controls...

..Promising new additive therapeutic approaches are ACE-inhibitors and AT-II receptor antagonists. In the future, combinations of pharmacotherapy and non-drug treatments will help to improve the treatment of atrial fibrillation...

..Radiofrequency ablation has been suggested as first-line therapy in the management of accessory pathways. There are limited data on the results of ablation over years of experience...

..on microvascular flow after acute coronary occlusion using the early sum of ST segment resolution in electrocardiography. Platelets may play a major role in the dissociation of epicardial artery recanalization and tissue level ..

..The purpose of this study was to identify ventricular tachycardia (VT) isthmus sites by pace-mapping within scar tissue and to identify electrogram characteristics that are helpful in identifying VT isthmus sites during sinus rhythm (SR)...

..More precise algorithms for risk stratification are thus needed that may help the strategy of therapy with prophylactic implantable cardioverter defibrillator in the future...

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..Primary percutaneous coronary intervention was successfully performed and the patient was discharged home in good clinical condition...

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..QT(RR) and JT(RR) intervals significantly and independently predict mortality in patients after infarction with conduction disturbances...

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..The present study tested the hypothesis that postconditioning during primary PCI preserves global cardiac function and reduces infarct size in patients after prolonged reperfusion...

..Hypothesis: The aim of the current study is to evaluate contraction asynchrony in postinfarction patients with intraventricular conduction defects...

..We performed electrocardiography and transthoracic echocardiography and determined serum oestradiol levels in both groups, and performed ..

..Information on the prevalence of truly normal coronary angiograms during the acute phase of a suspected ST-elevation myocardial infarction is lacking...

..Comparative characterization of prognostic value of Q-T and J-T intervals obtained at conventional 12-lead electrocardiography and 35-lead electrocardiotopography in assessment of risk of repetitive coronary events during follow up ..

..The number of elderly patients with atrial fibrillation (AF) is increasing rapidly, and the safety and efficacy of catheter ablation in this demographic group has not been established...

..In combination, these results provide the first direct evidence that I K1 up-regulation in the mouse heart is a substrate for stable and very fast rotors...

..The inclusion of octreotide in the list of drugs that may increase QTc should be reconsidered as regards its indication in acromegaly...

..Resolution of the ST-elevation is associated with a decrease. The increased non-dipolar content reflects a property of the repolarization phase, which is related to but separated from the ST-elevation...

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..The mass was completely resected and shown to be proliferative angiomatosis by histopathologic examination. This is the first reported case of primary left ventricular angiomatosis in the literature...

..Successful RF ablation of ns-VT using the CARTO system was performed. During 4-month follow-up the patient remains free from ventricular arrhythmia...

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..Pace mapping at sites proximal to the exit may produce a similar QRS with a longer stimulus-to-QRS interval (S-QRS). The aim of the study was to determine whether a VT isthmus could be identified and followed by pace mapping...

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..The diagnostic and therapeutic approach to patients with this unusual clinical presentation is also discussed...

..In an attempt to differentiate bystander pathways from critical sites within a reentry circuit, we compared the relative timing of isolated potentials during VT and sinus rhythm...

..These characteristics of the cardiovascular system require us keep in mind the "time" factor any time we analyze electrophysiological results and make clinical decisions...

..several members from the original Task Force on ARVD/C, and current experts in the imaging modalities, electrocardiography and pathology who have a major interest in ARVD/C...

..abstract_text> ..

..testing strategy (using physician-selected stress imaging (echocardiography or nuclear) or exercise electrocardiography)) in low-intermediate coronary artery risk patients with chest pain, and will reduce the composite primary ..

..stress testing strategy (using physician-selected stress imaging (echocardiography or nuclear) or exercise electrocardiography)) in low-intermediate coronary artery risk patients with chest pain, and will reduce the composite primary ..

..stress testing strategy (using physician-selected stress imaging (echocardiography or nuclear) or exercise electrocardiography)) in low-intermediate coronary artery risk patients with chest pain, and will reduce the composite primary ..

..stress testing strategy (using physician-selected stress imaging (echocardiography or nuclear) or exercise electrocardiography)) in low-intermediate coronary artery risk patients with chest pain, and will reduce the composite primary ..

..stress testing strategy (using physician-selected stress imaging (echocardiography or nuclear) or exercise electrocardiography)) in low-intermediate coronary artery risk patients with chest pain, and will reduce the composite primary ..

..testing strategy (using physician-selected stress imaging (echocardiography or nuclear) or exercise electrocardiography)) in low-intermediate coronary artery risk patients with chest pain, and will reduce the composite primary ..

..testing strategy (using physician-selected stress imaging (echocardiography or nuclear) or exercise electrocardiography)) in low-intermediate coronary artery risk patients with chest pain, and will reduce the composite primary ..

..testing strategy (using physician-selected stress imaging (echocardiography or nuclear) or exercise electrocardiography)) in low-intermediate coronary artery risk patients with chest pain, and will reduce the composite primary ..

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..abstract_text> ..

..The health implications of this project are a more accurate characterization of cardiovascular control in research and clinical studies of both normal and pathological conditions. ..

..The health implications of this project are a more accurate characterization of cardiovascular control in research and clinical studies of both normal and pathological conditions. ..

..programmed dosing, and physiological data acquisition modules for core body temperature, blood pressure and electrocardiography. In accordance with the intent of the SBIR program, the ultimate objective is an instrument that can be ..

..affords for the first time measurement of myocardial perfusion, diastolic function, systolic function, electrocardiography, myocardial edema and exertional symptoms - the complete ischemic cascade - in one test...

..The resulting transmural difference in AP repolarization creates the TW-Alt observed in the ECG waveform. ..

..Phase II (following 6 months of aripiprazole monotherapy). ..