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  • Title: Intranasal etripamil for rapid treatment of paroxysmal supraventricular tachycardia.
    Author: Calvert P, Gupta D.
    Journal: Future Cardiol; 2024; 20(3):163-170. PubMed ID: 38717391.
    Abstract:
    Paroxysmal supraventricular tachycardia (PSVT) is a common arrhythmia that, although usually benign, can occur unpredictably, cause disabling symptoms and significantly impair quality of life. If spontaneous resolution does not occur, the only current self-treatment is for the patient to attempt vagal maneuvers, however, these are frequently unsuccessful. Hospital attendance is then required for intravenous therapy. Etripamil, an intranasal calcium channel blocker similar to verapamil, may be able to fill this therapeutic gap, allowing rapid self-treatment of PSVT at home. This narrative review discusses the latest evidence for etripamil and its potential role in future clinical practice. Paroxysmal supraventricular tachycardia (PSVT) is an abnormal heart rhythm, causing the heart to beat rapidly. There are several ways to treat PSVT. This article discusses a new therapy, etripamil. One treatment involves breathing techniques called ‘vagal maneuvers’. These avoid medication and sometimes stop the abnormal rhythm, however, in many cases, this does not work. An alternative is a tablet taken when symptoms occur. Unfortunately, tablets take time to absorb, meaning symptoms may continue until the medication takes effect, and this approach does not work for everyone. If these approaches fail, patients suffering from PSVT may need to seek treatment at a hospital. This may involve intravenous therapy, with certain drugs causing unpleasant sensations of chest discomfort. Some patients may also be kept in the hospital for monitoring. Although PSVT can often be cured via a catheter ablation procedure, this is invasive (involving wires inserted via veins in the groin), so not everyone wishes to pursue this, and in some cases, it cannot be performed safely. There is a need for a rapid, safe, and effective treatment that patients can administer at home when PSVT occurs. Etripamil shows promise. Because it is a nasal spray, etripamil allows rapid absorption into the body – much faster than a tablet. Etripamil is not yet available on the market; however, several studies have demonstrated its effectiveness and safety, so it may be available in the near future. Promising evidence for etripamil in certain groups, such as elderly patients, is still lacking.
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