Then one might wonder why T-wave inversions are included as criteria for myocardial infarction. This is explained by the fact that T-wave inversions do occur after an ischemic episode, and these T-wave inversions are referred to as post-ischemic T-waves. Such T-waves are seen after periods...
The ST segments are concave; they are most prominent in V2-5; they have a slurred start (j-point); the ST elevation is usually minimal compared to the amplitude of the t-wave; there are no reciprocal changes; the ST segments do not change over time. 9. QT interval The QT interval i...
By using our best knowledge this domain, so far, we are the first ones who proposed the best possible solution in terms of accurate and efficient classification of different T wave episodes based on nature. Such natural identification entirely relies on the parameters of T wave. In literature, ...
By using our best knowledge this domain, so far, we are the first ones who proposed the best possible solution in terms of accurate and efficient classification of different T wave episodes based on nature. Such natural identification entirely relies on the parameters of T wave. In literature, ...
T-wave alternansMappingIn this article, the electrophysiologic basis of the various electrocardiogram characteristics of torsades de pointes (TdP) arrhythmias in long QT syndrome (LQTS) is presented. The invivo electrophysiologic mechanism of TdP in LQTS is described using, as a paradigm, the ant...
1. Is the P wave behind the PVC a sinus node P or an atrial extrasystole? 2. + 3. after one comes to the conclusion that it is a sinus node P: why is it not conducted and why is the PP distance smaller when there is a QRS complex in between than when there is not. ...
Mathematical and engineering methods allow the analyses of heart rate variability, T-wave shape, and QT variability [3], [4], [5]. The technological advances in electrocardiography have been substantially accelerated with the involvement of integrated circuits, computers, and the internet. Further...
The main part of an ECG contains a P wave, QRS complex and T wave. Each will be explained individually in this tutorial, as will each segment and interval. The P wave indicates atrial depolarization. The QRS complex consists of a Q wave, R wave and S wave and represents ventricular depo...
electrical activity of the heart, atrial contractions, ventricular contractions, P wave, T wave, QRS interval, QRS wave, QRS complex, heart rhythm disorders, arrhythmias, palpitations, nausea, anxiety, fainting, syncope, abnormal ECG tracings, AED, automatic external defibrillator, ECG results,Electro...
it plays an important role in the prevention of cardiovascular diseases by providing a diagnostic measure. A standard ECG waveform is a recording of the electrical activity of the heart consisting of P, Q, R, S and T wave as shown in Fig.1. Since ECG has many applications in various fiel...