suchas indications for cardiac resynchronization therapy(CRT) and evaluation for conduction system disease.Similar to PR intervals and P-wave duration, QRSduration has also been reported to vary based onsex. In addition to shorter PR intervals in women...
In some series,7,9 however, the QRS duration was less than 0.10 second in almost one third of the cases, presumably due to fusion between preexcited and normally conducted complexes. The sum of the PR and QRS intervals usually remains within the normal range. A normal “septal” q wave ...
The normal physiologic range of QRS complex duration spans between 80 and 125 ms with known differences between females and males which cannot be explained by the anatomical variations of heart sizes. To investigate the reasons for the sex differences as well as for the wide range of normal valu...
PROLONGED QRS DURATION PREDICTS CORONARY HEART DISEASE EVENTS IN WOMEN WITH TYPE 2 DIABETES MELLITUS: THE STRONG HEART STUDYNational vital event data suggest that cardiovascular disease (CVD) mortality rates are lower for American Indians and Alaska Natives (AIAN) than for the general US population,...
(results not shown). Consequently, sex-specific normal values were presented for the whole cohort regardless of age. The mean values ± 1.96 SD for the QRS-T angle were 19.7 ± 19.9° for females and 26.6 ± 28.3° for males. This yielded sex-specific thresholds for the ...
The longer the Q-wave duration, the more likely it is that infarction is the cause of the Q-waves. Infarction Q-waves are typically >40 ms. Examples of normal and pathological Q-waves (after acute myocardial infarction) are presented in Figure 12 below. ...
Comparison of QRS Duration and Associated Cardiovascular Events in American Indian Men versus Women (The Strong Heart Study)Resting electrocardiographic QRS duration is associated with sudden cardiac death and death from coronary heart disease in the general population. However, its relation to ...
The selected SAECGs from the preinflation and inflation recordings were analyzed in the standard frequency range. The QRS onset and offset were automatically determined. This QRS duration was later used for the high-frequency analysis (Fig. 2)(17). The ST- segment level above or below the PR...
Beyond the measurement of QRS complex toward mechanical dyssynchrony: cardiac resynchronisation therapy in heart failure patients with a normal QRS duration Heart, 90 (2004), pp. 479-481 View in ScopusGoogle Scholar 92 S. Garrigue, S. Reuter, J.N. Labeque, et al. Usefulness of biventricular...
Influence of statistical method used on the resulting estimate of normal range Clin Chem, 17 (1971), pp. 275-284 CrossrefView in ScopusGoogle Scholar 43. CE Metz, P Wang, HB Kronman A new approach for testing the significance of differences between ROC curves measured from correlated data ...