immediate and sustained (90 days) shortening of qrs duration with lvad support has been demonstrated, strongly correlated with improved ejection fraction and histological evidence of decreased myocyte diameter. to better elucidate the findings of the study by wang et al, it would be interesting to ...
This QRS duration was later used for the high-frequency analysis (Fig. 2)(17). The ST- segment level above or below the PR segment baseline at 60 ms after the J point was automatically measured in each lead. The ST deviation during inflation was determined with the preinflation SAECG as...
particularly at faster heart rates. It has been shown that earlier activation of the LV free wall by pacing (1) improvessystolic functionby shortening the duration of mechanical systole and increasing dP/dt, (2) improvesdiastolic functionby prolonging diastolic filling time, and (3) reduces presy...
A prolonged QRS interval suggests a diseased ventricular conduction system and has been associated with increased risk for sudden cardiac death, among other heart disorders. Study reveals links to abnormal rhythms behind sudden death, heart damage Because QT interval includes QRS duration, with the lat...
The duration of follow-up may not be sufficient to detect changes in ECG intervals. We followed the patients for six months; however, three months was enough in other studies to detect changes in PR intervals after TOF repair [9]. Furthermore, we included several types of congenital lesions...
(28%) by both the QRS duration and the QRS-T angle, respectively. The QRS-T angle had a 50%, 57% 55% and 51% agreement in correctly classified cases and non-cases with the Sokolow-Lyon Index, Cornell voltage, Cornell Product, and QRS duration, respectively, yielding a Cohen’s kappa...
There was no significant difference in the incidence of heart failure event between two groups during 24-month follow-up. Conclusion The prolonged paced QRS duration has a detrimental effect on long-term cardiac function during RVA pacing in patients with atrioventricular block. 展开 ...
As well known, the physiologically normal adult QRS complex is 80–125 ms wide1,2. It has also been long understood3that in addition to the heart size and to the ventricular myocardial mass4, the duration of the QRS complex is influenced by the myocyte geometry and layer orientation5, Purk...
forQRS duration; a recent consensus document specified 0.11 second (110 msec, nearly three small boxes). If the QRS duration is prolonged, an intraventricular or interventricular conduction delay (IVCD), or both, is present. Particular patterns of IVCD have been termedbundle branch block(see lat...
Each of a series of QRS_DURSAMPLE values that are measured after a change in one or more of the V—V delay, SAV delay, and PAV delay are compared with the preceding or prior measured QRS_DURSAMPLE value to determine if the change has decreased the QRS duration. An additional change in...