ST segment depression and T waves inversion are electrocardiographic (ECG) repolarization abnormalities often encountered in clinical medical practice that have been proved to predict future cardiovascular events. We present the case of a 62-year-old male patient, asymptomatic, with ST segment depression and inverted T waves discovered incidentally on resting ECG. Echocardiographic and laborato...

BACKGROUND Electrocardiography has been considered an important tool in the management of Chagas disease (ChD) patients, although its value in elderly infected patients is unknown. This study was designed to investigate the prevalence and prognostic value of electrocardiographic abnormalities in Trypanosoma cruzi infected and noninfected older adults. METHODS AND RESULTS We studied 1462 parti...

Examining the ECG signal carefully may lead to an accurate diagnosing for the heart abnormalities. Several techniques have been conducted in the area of arrhythmia detection using classical methods of classification. In the last two decades, there has been an increasing interest in applying techniques from the domains of nonlinear analysis and chaos theory in the characterization of the ECG sig...

In an unselected population of 2030 newborn infants studied by electrocardiography (ECG) between April 1975 and April 1977, 35 were found to have arrhythmias or other cardiac conduction abnormalities. Further investigation by means of 24-hour ECG monitoring showed that apparently serious tachyarrhythmias, such as ventricular tachycardia and slow heart rates associated with sinoatrial block, may...

BACKGROUND The diagnostic reliability and pathophysiologic relevance of different noninvasive diagnostic criteria for arrhythmogenic right ventricular cardiomyopathy (ARVC) are undefined. We tested the association between noninvasive diagnostic criteria for ARVC and the presence of low-voltage areas (LVAs) detected at electroanatomic voltage mapping (EAM). METHODS AND RESULTS Noninvasive diag...

Background Acute alcohol intoxication has been associated with cardiac arrhythmias but the electrocardiogram (ECG) changes associated with acute alcohol intoxication are not well defined in the literature. Objective Highlight the best evidence regarding the ECG changes associated with acute alcohol intoxication in otherwise healthy patients and the pathophysiology of the changes. Methods A ...

BACKGROUND T-wave abnormalities are common during the acute phase of non-ST-segment elevation acute coronary syndromes, but mechanisms underlying their occurrence are unclear. We hypothesized that T-wave abnormalities in the presentation of non-ST-segment elevation acute coronary syndromes correspond to the presence of myocardial edema. METHODS AND RESULTS Secondary analysis of a previously e...

OBJECTIVES We sought to determine whether the prehospital electrocardiogram (ECG) improves the diagnosis of an acute coronary syndrome. BACKGROUND The ECG is the most widely used screening test for evaluating patients with chest pain. METHODS Prehospital and in-hospital ECGs were obtained in 3,027 consecutive patients with symptoms of suspected acute myocardial infarction, 362 of whom were ...

BACKGROUND-The prevalence, clinical significance, and determinants of abnormal ECG patterns in trained athletes remain largely unresolved. METHODS AND RESULTS-We compared ECG patterns with cardiac morphology (as assessed by echocardiography) in 1005 consecutive athletes (aged 24+/-6 years; 75% male) who were participating in 38 sporting disciplines. ECG patterns were distinctly abnormal in 145 ...

BACKGROUND Chagas disease (CD) induces autonomic dysfunction and inflammatory activity, which may promote metabolic abnormalities. We studied metabolism and his correlation with Autonomic Nervous System (ANS) and inflammation in CD. METHODS AND RESULTS Sixty subjects were divided into 4 groups: control group (CG), IF (indeterminate form) group; ECG group (ECG abnormalities and normal left ven...