The autonomic and intrinsic cardiac involvement affects ventricular repolarization
and prolongs QTc and Tp-e intervals (14, 15).
KEYWORDS: Advanced age, Arrhythmia, Electrocardiogram, Pregnancy, Ventricular repolarization
showed that elevated repolarization
ability is directly associated with sympathetic cardiac activation in patients with essential hypertension.
The most common arrhythmia was found to be Supra ventricular tachycardia (SVT) 126 (44%), followed by premature ventricular contractions (PVCs) 80 (28%), early repolarization
34 (11.9%), Atrial fibrillation (AF) 25(8.7%), first degree heart block 15(5.2%),inappropriate sinus tachycardia (IST) 6 (2.1%).
Prominent positive atrial repolarization
waves ([T.sub.a]) are seen after the QRS complexes in leads II, III, and aVF giving rise to ST segment elevation, mimicking ST elevation myocardial infarction.
T peak is a marker of epicardial repolarization
while T end is believed to represent completion of repolarization
of the mid-myocardial cells.
Using specific formulations of [Na.sup.+], [K.sup.+], and [Ca.sup.2+] currents based on the experimental data recorded from human atrial myocytes, along with representations of pump, exchange, and background currents, the model is computationally efficient and correctly replicates physiologically repolarization
The QT interval on the surface ECG is a composite of ventricular activation (QRS) and completion of repolarization
(end of the T wave) as well as the net effect of these forces reaching the body surface .
QTc = QT/[[square root of RR].sup.1/2] Repolarization
parameters analyzed from QT measurements were:
Identifying Drug-Induced Repolarization
Abnormalities from Distinct ECG Patterns in Congenital Long QT Syndrome.
QT interval which is the time interval between beginning of Q wave and end of T wave represents electrical depolarization and repolarization
Further details such as QT interval prolongation and functional AVB due to prolonged ventricular repolarization
were accurately diagnosed by fetal magnetocardiography (fMCG).