INTRODUCTION The relationship between diastolic dysfunction and P-wave dispersion (PWD) in the electrocardiogram has been studied for some time. In this regard, echocardiography is emerging as a diagnostic tool to improve risk stratification for mild hypertension. OBJECTIVE To determine the dependence of PWD on the electrocardiogram and on echocardiographic variables in a pediatric population...

A surface electrocardiogram showing type B Wolff-Parkinson-White syndrome pattern was part of the cardiac findings in a female of 24 with florid features of tuberous sclerosis. She had cardiomegaly but no intracardiac tumour was demonstrated. Wolff-Parkinson-White syndrome, though rare, has previously been described in association with tuberous sclerosis in children but not before in adults.

please cite this article as : taherpour z, seyedian m, alasti m. simultaneous right coronary artery spasm in a patient with anterior st-segment elevation myocardial infarction: a case report. novel biomed 2013;1:29-33. simultaneous occlusion of two vessels causing infarction at different territories is an uncommon finding. we report simultaneous right ventricular and anterior st-segment elevati...

The effects of variations in the volume conductor properties of the torso on the electrocardiogram were studied by means of a theoretical eccentric spheres model. The model includes a blood cavity, cardiac muscle layer, pericardium, lung region, skeletal muscle layer, and subcutaneous fat. The source of the field is a double-layer spherical cap located within the myocardium. The following effec...

The changes in electrical potential at the surface of the body that are recorded as the electrocardiogram are the result of changes in the electrical currents produced by the myocardium. These currents are due to variations in the transmembrane potentials of the muscle fibres during each cardiac cycle. The uneven electrical properties of the tissues in the thorax distort the cardiac electrical ...

Background Clinicians use presence of Q waves as a sign of transmural infarction although this is an imperfect marker to predict lack of myocardial viability (MV). We hypothesized that presence of R waves as a marker of electrical activity on surface electrocardiogram (ECG) may be a sensitive marker for presence of MV as determined by delayed enhanced cardiac magnetic resonance (DECMR) imaging.

The electrocardiogram is the graphic representation against time of the difference in potential between points of the body caused by the current field of the heart. To examine the origin of this current field, a method of transforming body surface electrocardiographic data to the epicardial surface has been developed. The computed epicardial current density distributions in 219 patients with ac...