ECG Changes as Predictor of Mortality and Major Outcome Events in Theophylline Acutely Intoxicated Patients
Abuelfadl, A., Shahin, M., Alghazaly, G. (2017). ECG Changes as Predictor of Mortality and Major Outcome Events in Theophylline Acutely Intoxicated Patients. EKB Journal Management System, 25(1), 15-26. doi: 10.21608/mjfmct.2018.47266
Arwa A. Abuelfadl; Marwa M. Shahin; Ghada M. Alghazaly. "ECG Changes as Predictor of Mortality and Major Outcome Events in Theophylline Acutely Intoxicated Patients". EKB Journal Management System, 25, 1, 2017, 15-26. doi: 10.21608/mjfmct.2018.47266
Abuelfadl, A., Shahin, M., Alghazaly, G. (2017). 'ECG Changes as Predictor of Mortality and Major Outcome Events in Theophylline Acutely Intoxicated Patients', EKB Journal Management System, 25(1), pp. 15-26. doi: 10.21608/mjfmct.2018.47266
Abuelfadl, A., Shahin, M., Alghazaly, G. ECG Changes as Predictor of Mortality and Major Outcome Events in Theophylline Acutely Intoxicated Patients. EKB Journal Management System, 2017; 25(1): 15-26. doi: 10.21608/mjfmct.2018.47266

ECG Changes as Predictor of Mortality and Major Outcome Events in Theophylline Acutely Intoxicated Patients

Mansoura Journal of Forensic Medicine and Clinical Toxicology
Article 2, Volume 25, Issue 1, January 2017, Page 15-26  XML PDF (378.26 K)
Document Type: Original Article
DOI: 10.21608/mjfmct.2018.47266
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Authors
Arwa A. Abuelfadl1; Marwa M. Shahin email 2; Ghada M. Alghazaly3
1Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Tanta University
2Forensic Medicine and Clinical Toxicology Department, Faculty of Medicine, Tanta University, Egypt
3Internal Medicine Department, Faculty of Medicine, Tanta University, Egypt
Abstract
Acute theophylline toxicity is still an important cause of intoxication with major consequences; significant morbidity and mortality. Conflicting reports about both age and serum theophylline concentrations as predictors for development of major toxic effects were suggested by many authors. However, little is known about electrocardiography (ECG) as predictor of mortality and major outcome events in acute theophylline poisoned patients. The current observational cross sectional study was conducted to evaluate electrocardiographic findings as predictor of mortality and major outcome events [intensive care unit (ICU) admission, need for mechanical ventilation and need for hemodialysis] in acute theophylline toxicity. Twenty eight adult patients acutely exposed to theophylline have participated in the study. The severity of symptoms and signs of acute theophylline poisoning was graded into mild, moderate and severe grade theophylline poisoning. Electrocardiography was recorded and analyzed for rate, rhythm, axis, voltage, ST and T wave abnormalities, conduction defects, PR interval. The ECG changes induced by acute theophylline poisoning were graded into minor, moderate and severe. Corrected QT interval (QTc) was estimated according to Bazett's formula; QTc= QT/ √RR. Both normal and severe ECG changes were recorded in seven (25%) patients each. Meanwhile, moderate ECG changes were verified in 14 (50%) of patients. Fourteen patients (50 %) showed a prolonged QTc interval. Grading of ECG changes revealed significant statistical association with theophylline poisoning severity, theophylline level and major outcome events (ICU admission and need for hemodialysis). Meanwhile, no significant statistical association was perceived between QTc interval and any of sociodemographic, toxicological & clinical data, mortality and major outcome events.
Keywords
Acute Theophylline toxicity Electrocardiography Changes QTc Mortality Ventilation ICU Admission Hemodialysis
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