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  • Review Article
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Cardiac sympathetic denervation to prevent life-threatening arrhythmias

Key Points

  • After initial reports of the successful treatment of patients with angina, left cardiac sympathetic denervation (LCSD) entered clinical practice in the 1970s for patients with long QT syndrome (LQTS)

  • LCSD prevents arrhythmias of ischaemic origin, raises the threshold for ventricular fibrillation (VF), does not induce postdenervation supersensitivity, improves the capacity of coronary arteries to dilate, and preserves cardiac contractility

  • The different effects of LCSD versus right cardiac sympathetic denervation are explained by the fact that the left-sided cardiac sympathetic nerves are quantitatively dominant at the ventricular level

  • LCSD has proved to be highly effective in preventing life-threatening cardiac arrhythmias in patients with LQTS, catecholaminergic polymorphic ventricular tachycardia, or those at high cardiovascular risk after myocardial infarction

  • Preliminary data, and important effects on VF threshold, suggest that LCSD might be useful in many conditions characterized by high risk of life-threatening arrhythmias, including ischaemic, dilated, and hypertrophic cardiomyopathy

  • Cardiologists should discuss the advantages and disadvantages of LCSD compared with those of an implantable cardioverter–defibrillator with all patients, particularly children, who are at risk of arrhythmic sudden death

Abstract

Experimental and clinical evidence indicating an antiarrhythmic effect of cardiac sympathetic denervation has been available for 100 years. Experimental data show that left cardiac sympathetic denervation (LCSD), in particular, is not only antiarrhythmic, but also antifibrillatory—an effect exquisitely important for any clinical condition associated with a high risk of ventricular fibrillation and sudden cardiac death. LCSD has additional effects on both the coronary circulation and the mechanical performance of the left ventricle, with important implications for patients with ischaemic cardiomyopathy. Evidence also shows that LCSD increases the vagal activity directed to the heart, which has potential implications for the management of heart failure. In this Review, the current and novel clinical indications for LCSD are discussed, particularly in the context of results obtained in patients with channelopathies, such as long QT syndrome and catecholaminergic polymorphic ventricular tachycardia.

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Figure 1: Cardiac innervation and left sympathetic cardiac denervation.
Figure 2: Left stellate ganglion blockade is antiarrhythmic.
Figure 3: Effect of unilateral stellectomy and blockade on ventricular fibrillation threshold.
Figure 4: Left stellectomy is accompanied by a reflex increase in cardiac vagal efferent nerve activity.
Figure 5: LCSD reduces the incidence of sudden cardiac death after myocardial infarction.

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Acknowledgements

The author is grateful to Pinuccia De Tomasi BS (Association for the Study and the Prevention of Life-threatening Arrhythmias and Sudden Cardiac Death, Milan, Italy) for expert editorial support.

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Correspondence to Peter J. Schwartz.

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Schwartz, P. Cardiac sympathetic denervation to prevent life-threatening arrhythmias. Nat Rev Cardiol 11, 346–353 (2014). https://doi.org/10.1038/nrcardio.2014.19

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