QTc interval changes among patients on psychotropic medications: A prospective observational study
Shashidhara Munivenkatappa1, Vijaya Chandra Reddy Avula1, Rakesh Upparakadiyala2
1Department of Psychiatry, AIIMS Mangalagiri, Andhra Pradesh, India.
Industrial Psychiatry Journal
|June 10, 2024
Summary
This study found that newer psychotropic medications generally do not cause significant QT interval (QTc) prolongation in young, healthy patients. Escitalopram showed a notable effect on QTc compared to other tested psychotropics.
Area of Science:
- Cardiology
- Psychiatry
- Pharmacology
Background:
- Psychotropic medications are widely used for psychiatric disorders.
- Previous research presents conflicting findings on whether psychotropics prolong the QT interval (QTc).
- Some studies indicate a risk of QTc prolongation, while others show no significant association.
Purpose of the Study:
- To evaluate the impact of psychotropic drugs on QTc intervals in individuals new to these medications.
- To assess the short-term safety profile of psychotropics concerning cardiac electrical activity.
Main Methods:
- A prospective observational study was conducted at a tertiary care hospital.
- Participants were drug-naïve adults aged 18-45 without comorbidities or substance use history.
- Electrocardiograms (ECGs) were performed at baseline, 2 weeks, and 4 weeks after initiating psychotropic treatment.
Main Results:
- Eight patients (4%) with baseline QTc prolongation were excluded.
- No clinically significant QTc prolongation was observed with any psychotropic after 2 or 4 weeks.
- Escitalopram demonstrated a significant effect on QTc (P=0.001) compared to sertraline, risperidone, and olanzapine (P>0.05).
Conclusions:
- The short-term risk of QTc prolongation with newer psychotropics at standard doses appears low.
- This low risk is particularly evident in young patients with normal baseline QTc and no significant medical or substance use issues.
- Escitalopram warrants specific attention regarding its effect on QTc in this population.
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