Conclusion
The present study suggests that the use of telemetry-derived ECGs may lead to underestimation of the true QT interval and presence of low voltage QRS, while overestimating the presence of T wave and ST segment abnormalities. While telemetry-derived ECGs may be useful in screening patients for significant ECG abnormalities, they likely do not represent a reliable replacement for the standard 12-lead ECG in the routine diagnosis and management of critically ill patients.