The EKG in the patient treated with tricyclic antidepressants
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Electrocardiographic Findings
- EKG changes are observed in 20% of patients who are at therapeutic doses
- Prolongation of the QTc, displacement of the ST segment, T wave abnormalities, QRS widening, supraventricular and ventricular tachycardias can all occur.
- In overdose, widening of the QRS is frequent, and there is also QTc prolongation
Examples
 Severe nortriptyline intoxication. Wide QRS complex and a prolonged QT interval. |
 Severe nortriptyline intoxication |
 Severe amitriptylin intoxication. |
 Same patient before intoxication state. |
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
