Recently added articles from Journal of Electrocardiology:
Symposium on electrocardiogram in myocardial ischemia and infarction
Jan 01, 2009; ... The first recording of the electrocardiographic (ECG) pattern of acute myocardial infarction (MI), ST segment elevation, was obtained by Eppinger and Rothberger1 after intramyocardial injection of silver nitrate in 1909. Smith2 reproduced this finding by ligation of the left circumflex coronary ...
ST changes and temporal relation to the J point during heart rate increase and myocardial ischemia*
Jan 01, 2009; ... Abstract There is no concensus concerning where in the ST segment to measure. We studied the relation between different J point intervals to ST results during tachycardia and ischemia. Symptomatic (anesthetized) patients with coronary artery disease were paced at ascending incremental ...
Assessing the pattern of ST-segment depression during subendocardial ischemia using a computer simulation of the ventricular electrogram
Jan 01, 2009; ... Abstract The primary aim of the study was to write a simple educational personal computer (PC)-based program able to simulate normal and pathological electrogram (EG) to analyze the ST-segment and T-wave patterns during subendocardial ischemia. Background: The EG waveforms are know to ...
Effects of ischemic preconditioning and arterial collateral flow on ST-segment elevation and QRS complex prolongation in a canine model of acute coronary occlusion
Jan 01, 2009; ... Abstract Background: During acute myocardial infarction, both ST elevation and QRS distortion on the initial electrocardiogram (ECG) have been correlated with poorer prognosis. Studies in dogs and humans suggest that these ECG markers provide information about myocardial protection from both ...
Prinzmetal's work and the "Sclarovsky-Birnbaum ischemia score" for acute myocardial infarction: a parallel in systematizing electrocardiographic knowledge
Jan 01, 2009; ... Abstract In this viewpoint, the author traces back in time the original (? if possible) description of the electrocardiographic hallmarks of myocardial ischemic injury leading to myocardial infarction. In this venture, he detects a parallel between the work of Prinzmetal et al and that of ...
Upgrading the electrocardiogram in the 21st century
Jan 01, 2009; ... As the establishment of science-based theories further elucidate our expanding technological knowledge, they become less vulnerable to refutation. In most sciences, theories that permit superior prediction are less likely to be replaced by mere conjecture.1 The report by Madias is an ...
Frequency of diastolic third and fourth heart sounds with myocardial ischemia induced during percutaneous coronary intervention
Jan 01, 2009; ... Abstract Background: Although the standard 12-lead electrocardiogram (ECG) is considered the gold standard to diagnose acute myocardial ischemia, nearly half of ECGs are nondiagnostic in patients who present with chest pain and have subsequent confirmation of infarction with positive serum ...
Electrocardiographic determination of culprit lesion site in patients with acute coronary events
Jan 01, 2009; ... Abstract Purpose: The purpose of our study was to determine the ability of electrocardiographic (ECG) criteria derived from prior angiographic-ECG correlative studies to identify life-threatening coronary artery obstructive lesions. Methods: We studied 128 consecutive patients referred ...
Does left anterior descending coronary artery acute occlusion proximal to the first septal perforator counteract ST elevation in leads V^sub 5^ and V^sub 6^?*
Jan 01, 2009; ... Abstract The mechanisms of the so-called extensive anterior acute myocardial infarction including ST-segment elevation in leads V^sub 1^ (ST[arrow up]^sub V1^) through V^sub 6^ (ST[arrow up]^sub V6^) are not clear. This report is focused on the electrocardiographic (ECG) changes in 2 cases with ...
In search of the best method to predict acute coronary syndrome using only the electrocardiogram from the emergency department*
Jan 01, 2009; ... Abstract Introduction: The aim of this study was to compare different methods to predict acute coronary syndrome (ACS) using only data from a single electrocardiogram (ECG) in the emergency department (ED). Method: We compared the ACS prediction abilities of classical ECG criteria, human ...
ST changes before and during primary percutaneous coronary intervention predict final infarct size in patients with ST elevation myocardial infarction*
Jan 01, 2009; ... Abstract Background: In patients with ST elevation myocardial infarction (STEMI), spontaneous ST resolution (spontSTR) is a marker of successful microvascular reperfusion. The significance of increase in ST elevation during reperfusion therapy (the ST peak phenomenon), however, is ...
Total absence of ST-segment resolution after failed thrombolysis is correlated with unfavorable short- and long-term outcomes despite successful rescue angioplasty
Jan 01, 2009; ... Abstract Introduction: ST-segment resolution (STR) is a well-established and simple tool for assessing the efficacy of reperfusion therapy in myocardial infarction. An incomplete (<50%) STR is a recognized marker of failed thrombolysis and a suitable recruitment criterion for rescue ...
Prognostic significance of inverse spatial QRS-T angle circadian pattern in myocardial infarction survivors
Jan 01, 2009; ... Abstract Background: We investigated the predictive value of the spatial QRS-T angle (QRSTA) circadian variation in myocardial infarction (MI) patients. Methods: Analyzing 24-hour recordings (SEER MC, GE Marquette) from 151 MI patients (age 63 ± 12.7), the QRSTA was computed in derived ...
The QRS complex-a biomarker that "images" the heart: QRS scores to quantify myocardial scar in the presence of normal and abnormal ventricular conduction*
Jan 01, 2009; ... Introduction Acute myocardial infarction (MI) and chronic fibrosis (scar) from ischemic or nonischemic etiology create regions of slowed conduction providing a substrate for reentrant arrhythmias.1 Even in nonischemic cardiomyopathy the scar could be produced by the disruption of blood ...
REPORT ON THE 35TH INTERNATIONAL CONGRESS ON ELECTROCARDIOLOGY
Jan 01, 2009; ... SEPTEMBER 18-21, 2008, ST PETERSBURG, RUSSÍA The 35th International Congress on Electrocardiology was held in St Petersburg in mid September 2008. The President of the Congress this year was Professor M Roshchevsky from the Institute of Comparative Electrophysiology in Syktyvkar. The ...
Reduced and alternative lead sets: clinical implications and technical challenges
Nov 01, 2008; ... Introduction Although the standard resting 12-lead electrocardiogram (ECG) is one of the most widely available and taught tools for noninvasive evaluation of cardiac function, clinical and practical considerations with regard to noise reduction, ease of use, and technical limitations ...
Proximal placement of limb electrodes: a potential solution for acquiring standard electrocardiogram waveforms from monitoring electrode positions
Nov 01, 2008; ... Abstract There is currently a challenge to produce an electrocardiogram (ECG) recording of waveforms that are "standard" and also achieve the "noise immunity" required for continuous monitoring. The potential solutions that have been considered are to label each torso-recorded ECG as ...
Standardization of reduced and optimal lead sets for continuous electrocardiogram monitoring: where do we stand?
Nov 01, 2008; ... Abstract Mason-Likar or proprietary reduced lead (RL) configurations are used for continuous 12-lead electrocardiogram (ECG) monitoring. Because each RL set has a different electrode configuration and derivation, they are inherently different and should not be compared with each other or ...
Technical challenges and future directions in lead reconstruction for reduced-lead systems
Nov 01, 2008; ... Abstract Reduced-lead electrocardiographic systems are currently a widely accepted medical technology used in a number of applications. They provide increased patient comfort and superior performance in arrhythmia and ST monitoring. These systems have unique and compelling advantages ...
Cardiac repolarization instability during normal postnatal development
Nov 01, 2008; ... Abstract Long QT syndrome is a disease characterized by abnormal lengthening of the QT interval and by sudden cardiac death. It is a disease of development, with the incidence of a sudden event increasing during childhood. Repolarization instability during postnatal development could ...