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Archive » 1997 » 4 » | Archive » Medical field » Fields » Anesthesiology »

The effect of subarachnoid blockade on the cardiovascular system

 
Abstract:

This post is also available in: English Slovenščina (Slovenian)

Subarachnoid blockade is defined as a temporary interruption of nerve impulse transmission produced by injecting of a local anesthetic into the subarachnoid space. The only reason for the clinical effects of subarachnoid anaesthesia on the cardiovascular system is a preganglionic sympathetic block, which affects all the haemodynamic parameters determining the blood pressure. The decrease in blood pres­sure following subarachnoid blockade is caused by a decrease in both cardiac output and in peripheral resistance. The decrease in cardiac output is due to a decrease in preload sec­ondary to an increase in venous capacity lead­ing to a lower filling pressure to the heart. During high subarachnoid block the reduction in cardiac output is also caused by a decrease in heart rate and perhaps by a decrease in the contractility of the heart.

Authors:
Kamenik Mirt

Keywords:
anesthesia spinal - adverse effects, subarachnoid space, cardiovascuclar system

Cite as:
Med Razgl. 1997; 36: 559–68.

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