ECG J waves

ECG Diagnosis: Hyperacute T Waves.

After QT prolongation, hyperacute T waves are the earliest-described electrocardiographic sign of acute ischemia, preceding ST-segment elevation. The principle entity to exclude is hyperkalemia-this T-wave morphology may be confused with the hyperacute T wave of early transmural myocardial infarction.

Algorithm for Automatic Detection of Ecg Waves

An accurate measurement of the different electrocardiogram (ECG) intervals is dependent on the accurate identification of the beginning and the end of the P, QRS, and T waves. Available commercial systems provide a good QRS detection accuracy. However, the detection of the P and T waves remains a serious challenge due to their widely differing morphologies in normal and abnormal beats. In this ...

ECG delta waves in patients with palpitation.

It is important to recognise Wolff-Parkinson-White (WPW) syndrome in electrocardiograms (ECG), as it may mimic ischaemic heart disease, ventricular hypertrophy and bundle branch block. In addition, ECG can aid in the localisation of the accessory pathway. Recognising WPW syndrome allows for risk stratification, the identification of associated conditions and the institution of appropriate manag...

Hypothermia with J (Osborne) waves.

Statistical Analysis for Human Authentication Using ECG Waves

Automated security is one of the major concerns of modern times. Secure and reliable authentication of a person is in great demand. A biometric trait like the electrocardiogram (ECG) of a person is unique and secure. In this paper we propose an authentication system based on ECG by using statistical features like mean and variance of ECG waves. Statistical tests like Z−test, t−test and χ2−tests...