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).
The MARC concluded that QT prolongation/TdP is a risk of treatment with most of the antidepressants approved for use in New Zealand. QT prolongation is a measure of delayed ventricular repolarisation and is a surrogate marker for the risk of developing the potentially fatal arrhythmia TdP. The definition of QT prolongation depends on the age and gender of the patient. However, a QTc greater than 500ms or an increase of greater than 60ms during treatment is considered to confer a high risk of TdP. QTc is the QT interval corrected for heart rate.