Warning: These 10 Medications Can Increase Your Risk of Sudden Cardiac Death
Your heart health may be at risk if you're taking certain medications that can prolong the QT interval, a critical measure of the heart's electrical system. QT interval prolongation, or QTc prolongation, can lead to a potentially life-threatening arrhythmia known as Torsades de Pointes, which can increase the risk of sudden cardiac death. The QT interval measures the time between the start and end of the Q wave and the T wave in an electrocardiogram (ECG). It is an essential indicator of the heart's electrical system function, and a prolonged QT interval can lead to a higher risk of abnormal heart rhythms.
What Are QTc Prolongation and Torsades de Pointes?
Torsades de Pointes, also known as TdP, is a rare but potentially life-threatening abnormal heart rhythm that can occur in people with a prolonged QT interval. The condition is characterized by a rapid heart rate and a distinctive "twisting" of the heart's electrical activity, which can lead to a sudden and unpredictable cardiac arrest. TdP can occur without warning and often affects individuals with a pre-existing heart condition or those taking medications that prolong the QT interval.
Common Medications That Can Prolong the QT Interval
Researchers have identified numerous medications that can increase the risk of QTc prolongation, Torsades de Pointes, and sudden cardiac death. Here are 10 medications that patients with heart conditions, particularly those with QT interval prolongation, should avoid or use with extreme caution:
**1.** **Quetiapine (Seroquel)**: This antipsychotic medication can prolong the QT interval by suppressing the ICa (calcium current) responsible for ventricular repolarization.
Some studies have shown that up to 10% of patients taking quetiapine experience QTc prolongation, which increases the risk of Torsades de Pointes and cardiac arrest.
**2.** **Citalopram (Celexa)**: This antidepressant medication is another culprit that can prolong the QT interval by blocking ICa and increasing the risk of Torsades de Pointes.
Mexiletine is another antidepressant like ()...
**3.** **Cisapride (Propulsid)**: Although no longer commercially available in the US, this prokinetic agent was withdrawn from the market due to reports of QTc prolongation and Torsades de Pointes.
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Warning: These 10 Medications Can Increase Your Risk of Sudden Cardiac Death
Your heart health may be at risk if you're taking certain medications that can prolong the QT interval, a critical measure of the heart's electrical system. QT interval prolongation, or QTc prolongation, can lead to a potentially life-threatening arrhythmia known as Torsades de Pointes, which can increase the risk of sudden cardiac death. The QT interval measures the time between the start and end of the Q wave and the T wave in an electrocardiogram (ECG). It is an essential indicator of the heart's electrical system function, and a prolonged QT interval can lead to a higher risk of abnormal heart rhythms.
What Are QTc Prolongation and Torsades de Pointes?
Torsades de Pointes, also known as TdP, is a rare but potentially life-threatening abnormal heart rhythm that can occur in people with a prolonged QT interval. The condition is characterized by a rapid heart rate and a distinctive "twisting" of the heart's electrical activity, which can lead to a sudden and unpredictable cardiac arrest. TdP can occur without warning and often affects individuals with a pre-existing heart condition or those taking medications that prolong the QT interval.
Common Medications That Can Prolong the QT Interval
Researchers have identified numerous medications that can increase the risk of QTc prolongation, Torsades de Pointes, and sudden cardiac death. Here are 10 medications that patients with heart conditions, particularly those with QT interval prolongation, should avoid or use with extreme caution:
**1.** **Quetiapine (Seroquel)**: This antipsychotic medication can prolong the QT interval by suppressing the ICa (calcium current) responsible for ventricular repolarization. Some studies have shown that up to 10% of patients taking quetiapine experience QTc prolongation, which increases the risk of Torsades de Pointes and cardiac arrest.
**2.** **Citalopram (Celexa)**: This antidepressant medication is another culprit that can prolong the QT interval by blocking ICa and increasing the risk of Torsades de Pointes. Mexiletine is another antidepressant that has been linked to QTc prolongation.
**3.** **Cisapride (Propulsid)**: Although no longer commercially available in the US, this prokinetic agent was withdrawn from the market due to reports of QTc prolongation and Torsades de Pointes.
**4.** **Fospropofol**: An anesthetic medication, fospropofol has been shown to increase the risk of QTc prolongation in a dose-dependent manner.
**5.** **Domperidone**: This antacid medication has been linked to an increased risk of QTc prolongation and Torsades de Pointes in patients taking it for gastrointestinal disorders.
Other medications known to cause QTc prolongation include Beprilol, Cristersilimetuddlefield Ekisco boats:
**6.** **Astemizole**: An antihistamine medication, astemizole was withdrawn from the US market due to reports of QTc prolongation and Torsades de Pointes.
**7.** **Cyclobenzaprine**: This muscle relaxant has been linked to QTc prolongation and should be used with caution in patients with heart conditions.
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