OBJECTIVE To investigate the accuracy of signal averaged electrocardiography (SAECG) and measurement of microvolt level T wave alternans as predictors of susceptibility to ventricular arrhythmias. DESIGN Analysis of new data from a previously published prospective investigation. SETTING Electrophysiology laboratory of a major referral hospital. PATIENTS AND INTERVENTIONS 43 patients, not ...

OBJECTIVE To define the clinical value of the signal averaged P wave (SAPW) and to compare it with the standard electrocardiogram (ECG), echocardiogram, and clinical assessment for the prediction of atrial fibrillation after coronary bypass grafting (CABG). DESIGN Prospective validation cohort study. SETTING Regional cardiothoracic centre. PATIENTS 201 unselected patients undergoing first...

electrocardiographic study of 50 healthy markhoz goats ranging from less than 1 to more than 3 years inage was carried out. the heart rate varied from 99 to 123 beats/min with a mean of 110 beats/min. there wasa significant difference between the heart rate of goats in 3 age groups (pt waves and qt interval in base apex lead, qrs wave in lead i, p-r and pq interval in avf lead were higherand du...

Electrocardiography has played an important role in the detection and characterization of heart function, both in normal and abnormal states. In this paper we present an inhomogeneous, anisotropic computer model of the human thorax for use in electrocardiography with emphasis on the calculation of transthoracic potential and current distributions. Knowledge of the current pathways in the thorax...

Cross sectional echocardiography, 12 lead electrocardiography, and 24 hour ambulatory electrocardiography were performed in eleven patients with tuberous sclerosis. Echocardiography showed single or multiple intramyocardial masses, most commonly in the ventricular septum, suggestive of rhabdomyomata in seven of the eleven cases. One patient with a normal echocardiogram showed ventricular pre-ex...

In patients with Brugada syndrome (BRS), especially those who are asymptomatic, preclinical diagnosis and risk stratification are vital to the prevention of the fatal ventricular arrhythmias. The initial optimism that a diagnosis of BRS could be made simply on the basis of distinct electrocardiographic (ECG) changes (see the following text) has been tempered, both by a high incidence of false-p...