The electrocardiographic (ECG) ST segment response to exercise is perhaps the most commonly used functional test for the assessment of coronary artery disease.' However, it has important limitations in the evaluation of myocardial ischaemia for two reasons. First, according to the theory of the ischaemic cascade, ECG changes and symptoms are preceded by flow heterogeneity followed by the develo...

INTRODUCTION Previous studies have raised the probably of cardiac manifestation in tramadol poisoning. However, conclusive information on electrocardiographic (ECG) abnormalities of tramadol overdose remains to be explained. Therefore, the present study aimed to evaluate the epidemiology of ECG abnormalities in tramadol poisoned patients. METHODS In a prospective cross-sectional study, all pa...

This case report describes several electrocardiographic findings in an 8-years old female Pomeranian dog that was referred with a history of digoxin overdose. Electrocardiographic abnormalities detected in this case could be classified as primary electrocardiographic disturbances, reflecting cardiac chamber enlargement and secondary ECG changes, attributed to digoxin toxicity. ECG manifestatio...

OBJECTIVE (1) Compare rates of abnormal screening electrocardiograms (ECGs) using updated criteria compared with older criteria. (2) Compare rates of abnormal ECGs by ethnicity. (3) Evaluate ability of ECG criteria to detect the predicted number of athletes with previously undetected cardiovascular abnormalities. DESIGN Prospective and retrospective review of ECGs. During the prospective port...

The recording of heart signal is called Electrocardiogram (ECG). ECG is used to measure, analyze, observe the heart function and heart abnormalities like cardiac murmur, myocardial infarction etc. The ECG electrodes are sensitive in nature, even the small noise mixed with original signal changes the ECG wave pattern. The ECG signal voltage ranges from 0.5 to 6mV and artifacts can be easily mixe...

In this article, we evaluate electrocardiographic (ECG) alterations among urban workers from a mechanical-metallurgical industry in Sao Paulo, Brazil. In a cross-sectional survey carried out in 1980, we found 2.2% positive serological testing for Trypanosoma cruzi infection among 27,081 workers. A comparison between seropositive workers and a random sample of seronegative workers frequency-matc...

We have assessed right and left ventricular function by multigated radionuclide ventriculography in 12 consecutive patients with acquired immunodeficiency syndrome (AIDS) grouped according to the CDC classification system for HIV infection. Results were correlated with clinical, electrocardiographic and echocardiographic findings. Clinical examination and chest x-ray films showed no evidence of...

The effect of repeated exposure to carbon monoxide (CO) on the response of middle-age rats to an acute CO exposure combined with a low dose of a sympathomimetic agent was studied. A group of 12 rats (male albino, Wistar, age 9 months) without ECG abnormalities was divided into two subgroups matched for weight, heart rate and ECG: one subgroup was exposed to 500 ppm CO for 6 h/d, 5 d/w, for 6 we...

We evaluated the effects of isoflurane anaesthesia and induced hypotension in 33 neurosurgical patients by electrocardiographic monitoring and serial cardiac enzyme measurements. An electrocardiogram (ECG) and serum enzymes were obtained preoperatively, intraoperatively and postoperatively in the recovery room and for three consecutive days. ECG leads II, V1 and V5 were monitored continuously d...

a 6-year-old male crossbred dog was referred to the veterinary medical teaching hospital of islamic azad university of karaj with the history of abdominal distention, rectal tenesmus and stranguria. abdominal radiographs and ultrasonography indicated large distended urinary bladder and prostatic enlargement. ecg showed temporary episodes of atrial standstill. the only abnormalities detected by ...