Differential effect of defibrillation on systemic and cardiac sympathetic activity

摘要

Conclusions-A dc shock induces marked systemic sympathoadrenal and sympatho- neuronal activation, but attenuates car- diac sympathetic activity. This might promote the transient myocardial depres- sion observed after electrical discharge to the heart. Objective-To assess the effect of defibril- lation shocks on cardiac and circulating catecholamines. Design-Prospective examination of myo- cardial catecholamine balance during dc shock by simultaneous determination of arterial and coronary sinus plasma con- centrations.