Quetiapine-Induced Palpitations

Mechanism and Risk Factors

Antipsychotics like quetiapine have antimuscarinic effects that alter cardiac autonomic tone, leading to increased heart rate and palpitations, according to the American College of Cardiology 1
Current antipsychotic use, particularly second-generation agents like quetiapine, is associated with an increased risk of atrial fibrillation (adjusted OR: 1.17), as reported by the American Heart Association 1
Quetiapine has an adjusted odds ratio of 1.55 for atrial fibrillation, indicating a significant risk, as stated by the European Society of Cardiology 1
Patients with pre-existing cardiovascular disease, elderly patients, and those taking other medications that affect heart rate are at higher risk for experiencing palpitations with quetiapine, as noted by the National Institute of Health 1

Beta-blockers or calcium channel blockers may have additive effects on heart rate when used with quetiapine, as warned by the American College of Cardiology 2
Serotonergic drugs may potentiate cardiovascular effects when used with quetiapine, according to the National Institute of Mental Health 2
Quetiapine should be avoided in patients with a history of cardiac arrhythmias, congenital QT prolongation, or concomitant use of other QT-prolonging medications, as contraindicated by the Food and Drug Administration 2

Regular ECG monitoring is recommended in high-risk patients taking quetiapine, as advised by the American Heart Association 1
Monitoring for orthostatic changes in blood pressure and heart rate is essential in patients taking quetiapine, as recommended by the European Society of Cardiology 1
Quetiapine should be started with lower doses (25 mg twice daily) and titrated slowly to minimize the risk of palpitations, as suggested by the National Institute of Health 1