Marital Status. Fun Facts. James Crumb. Statistics for all 110 People named James Crumb. $56k. Income average. Our wealth data indicates income average is $56k. 67%. Married. 66.7% of these people are married, and 33.3% are single or divorced. 59 yrs. Average age. 22% are in their 40s, while the average age is 59.
QT Prolongation. Recognition of a prolonged QT interval is complicated by the problems inherent in identification of T wave end and the inaccuracy of Bazlet's formula for correcting for heart rate. It may be preferable to judge the QT interval by changes in length or when it exceeds 50% of the R-R interval.T prolongation can be due to rare hereditary abnormalities, to type Ia anti-arrhythmics such as quinidine, and to hypocalcemia or hypomagnesia. The importance of recognizing prolonged QT interval is that it is associated with PVC's, ventricular tachycardia and fibrillation (ie., vulnerability to lethal arrhythmia).
Classically, the abnormal repolarization results in QT prolongation on the ECG; however, it is now recognized that up to 30% of gene-positive individuals may have a normal corrected QT (QTc) interval at rest (phenotype negative).T and QTc Versus Heart Rate. The QT lengthened as heart rate decreased in an approximately linear fashion, with an average increase of 15 ms per 10-beat decrease in heart rate. The QT interval did not reach a plateau (Figure 1 A).