A closed-book, multiple-choice examination following this article tests your under standing of the following objectives:1. discuss advantages of automated decision support tools. 2. describe the steps taken to improve documentation of QT intervals. 3. discuss risk factors for torsade de pointes.To read this article and take the CNE test online, visit www.ajcconline.org and click "CNE Articles in This Issue." No CNE test fee for AACN members.By Kristin E. sandau, RN, phd, CNE, sue sendelbach, RN, phd, CCNs, Linda Fletcher, MHI, Joel Frederickson, phd, Barbara J. drew, RN, phd, and Marjorie Funk, RN, phd Background Many medications commonly used in hospitals can cause prolonged corrected QT interval (QTc), putting patients at risk for torsade de pointes (TdP), a potentially fatal arrhythmia. However, documentation of QTc for hospitalized patients receiving QT-prolonging medications is often not consistent with American Heart Association standards. Objective To examine effects of education and computerized documentation enhancements on QTc documentation. Methods A quasi-experimental multisite study among 4011 cardiac-monitored patients receiving QTc-prolonging medications within a 10-hospital health care system was conducted to compare QTc documentation before (n=1517), 3 months after (n = 1301), and 4 to 6 months after (n = 1193) an intervention. The intervention included (1) online education for 3232 nurses, (2) electronic notifications to alert nurses when a patient received at least 2 doses of a QT-prolonging medication, and (3) computerized calculation of QTc in electronic health records after nurses had documented heart rate and QT interval. Results QTc documentation for inpatients receiving QTcprolonging drugs increased significantly from baseline (17.3%) to 3 months after the intervention (58.2%; P < .001) within the 10 hospitals and had increased further 4 to 6 months after the intervention (62.1%, P = .75). Patients at larger hospitals were significantly more likely to have their QTc documented (46.4%) than were patients at smaller hospitals (26.2%; P < .001). Conclusion A 3-step system-wide intervention was associated with an increase in QTc documentation for patients at risk for drug-induced TdP, and improvements persisted over time. Further study is needed to assess whether increased QTc documentation decreases occurrence of drug-induced TdP. (American Journal of Critical Care. 2015;24:e6-e15)
Background Prolongation of QT IntervalOn the electrocardiogram (ECg), the QT interval represents both depolarization and repolarization of the ventricles.3 For practical clinical purposes, however, the QT interval is used as an indirect measure of ventricular repolarization because the start of the QRs complex is easy to identify; thus, measurement of the QT interval is initiated at the beginning of the QRs complex and terminated at the end of the T wave.4 patients with a prolonged QT interval are at risk for Tdp, a polymorphic ventricular tachycardia characterized by twisting points of the QRs complex a...