Stankovic, "On the parameterization of Hermite transform with application to the compression of QRS complexes
," Signal Processing, vol.
This algorithm enables a detection of QRS complexes
with 98.5 % reliability for ECG signals taken during body motion.
On the other hand, these algorithms cannot be achieved to apply on the signals obtained from different channels of ECG because T wave and QRS complexes
The tachycardia and sinus rhythm QRS complexes
may then be compared.
In the original algorithm of Pan and Tompkins, the size of the window is set to 150 ms wide that allows wider QRS complexes
produced by the premature ventricular contractions (PVC) and merging of the QRS complexes
with the T waves.
The difficulty arises in detecting the fetal QRS complexes
from the AECG signal, which consists of both the MECG and FECG.
We hypothesized that fragmented QRS complexes
(fQRS) may be useful for determining patients at high risk for new-onset postoperative atrial fibrillation (POAF) which is a frequent and serious complication of coronary artery bypass graft (CABG) surgery.
* Relative duration of RP and PR intervals can help to differentiate narrow QRS complex tachycardias based on the timing of the P wave with respect to adjacent QRS complexes
. Those in which the RP interval is longer than the PR interval are called long RP tachycardies and include sinus tachycardia, intra-atrial tachycardia, atypical AVNRT, and AVRT with a slowly conducting ventriculoatrial pathway.
determined ECG disorder such as sinus tachycardia or bradycardia, bundle branch conduction defects, non-specific ventricular repolarization disturbances, supraventricular and ventricular extrasystoles, prolonged QT interval, low voltage of the QRS complexes
in standard limb leads, atrioventricular block first-degree, and atrial fibrillation in patients with HFRS.
(39,53) The morphology of the QRS complexes
is usually the same as in normal sinus rhythm--either narrow complex or exhibiting pre-existent bundle branch block.
The classic electrocardiographic changes associated with TdP include a wide complex QRS tachycardia, and a beat-to-beat axis deviation of the QRS complexes
around the baseline that is referred to as the 'twisting of the points' (Landen, Schmidt, & Poponick, 2007).