QT interval importance in complicated patients. How much it should be focused?

  • Majid Malaki Pedaitric Nephrologist, Sevome Shaban Hospital, Tehran, Iran.
Keywords: Nil

Abstract

QT interval is a practically feasible and accessible index, which denotes the repolarization quality of myocytes and its prolongation. QT interval might be important in some of the clinical disorders such as syncope, seizure and cardiac arrest. QTc normally varies in different age periods from 330 to 440 ms in late adolescence, whereas in adults but after then QTc over 450-470 ms in female and more than 450 msec in male has been considered as prolonged QTc.[1] The incidence of prolonged QTc interval is not same in all studies. In critically ill patients, prolongd QTc may occur up to 52%.[2] QTc interval changes with race and gender, and it been reported that the increment in average QTc interval of 16 msec in women and 6 msec in black race can increase their mortality rate after cardiac events.[3] Prolonged QTc defined as a value over 440 msec can be met in 8.7% of normal population and many different factors can do shorten or lengthen the QTc. For example it can decrease by diabetes and smoke and prolonged due to electrolyte disorders, coronary artery disease and advancement with age.[3-5]

Published
2015-01-31
How to Cite
Malaki, M. (2015). QT interval importance in complicated patients. How much it should be focused?. International Journal of Clinical and Experimental Physiology, 2(1), 83-84. Retrieved from https://ijcep.org/index.php/ijcep/article/view/54