The spatial vector and loop allow a more concise description of the heart's total electromotive force at an instant, and throughout the cardiac cycle, than the conventional electrocardiogram and the three-plane vectorcardiogram. The magnitude of spatial vectors and the angles enclosed by these vectors are independent of cardiac position. Their relationship to the cardiac forces is therefore rel...

Human biomechanical energy is characterized by fluctuating amplitudes and variable low frequency, and an effective utilization of such energy cannot be achieved by classical energy-harvesting technologies. Here we report a high-efficient self-charging power system for sustainable operation of mobile electronics exploiting exclusively human biomechanical energy, which consists of a high-output t...

The object of this study was to assess the ability of junior doctors in the accident and emergency department to detect electrocardiographic (ECG) abnormalities. The ECG's performed in this department were monitored over a 4 week period. The initial diagnosis by the accident and emergency doctor was compared with the report from the cardiologist on 126 ECG's which showed abnormalities. The erro...

OBJECTIVE To investigate the quantitative relationship, if any, between signal averaged electrocardiographic variables and echocardiographically determined left ventricular mass in hypertensive subjects. DESIGN Cohort analytic prospective study. SETTING University hospital. SUBJECTS 50 hypertensive subjects selected consecutively from inpatients. Patients older than 75 years, with underly...

FROM A STUDY OF THE ACCOMPANYING TRACINGS WE MAY CONCLUDE THAT: 1. The delicate mechanism of the micrograph registers the movements in the heart and blood-vessels more accurately than does the polygraph. 2. The inertia of the polygraph lever and diaphragm distorts the tracing. The difference between the results obtained with the two instruments is shown by the records made simultaneously with t...

evaluation of the cardiovascular system of canine pediatrics requires awareness of the anatomical and physiological changes occurring from birth to six months of age. the aim of this study was to report electrocardiographic changes in the littermate mongrel dogs from birth tosix months. serial six-lead electrocardiograms were recorded from ten normal littermate mongrel dogs kept on right latera...

Background: The aim of this study was to evaluate and compare the clinical and ‎electrocardiographic (ECG) manifestations of benzodiazepines (BZs).‎ Methods: In this retrospective study, all BZ-poisoned patients hospitalized at Loghman ‎Hakim Hospital between September 2010 and March 2011 were evaluated. Patients’ ‎information including age, sex, time elapsed between the ingestion and presenta...

The presence of ST segment depression in right-sided electrocardiographic leads has been infrequently reported in the literature. We report the cases of two patients with anterolateral and posterior myocardial infarctions with ST segment depression in right-sided electrocardiographic leads. We hypothesize that this electrocardiographic change is a reciprocal expression of ST segment elevation o...