What Are the Effects of Potassium Chloride on the Heart?
Potassium chloride (KCl) is a salt that can be taken medically as a capsule, tablet, liquid or powder mix, but it can also be used for lethal injections. Both functions involve its effect on the heart. Potassium The body needs potassium to assist several functions, including heartbeat. Potassium chloride can be used to raise levels of potassium in the bloodstream. Heart Activity Because potassium ensures regular heartbeat, heart activity (particularly electrical activity) can be measured with an electrocardiograph to see if the potassium chloride is working. Lethal Injections In lethal injections, potassium chloride is the third injection–after sodium thiopental and pancuronium bromide–and is used to induce cardiac arrest and permanently stop the heart. Side Effects Uneven heartbeat is a serious potential side effect of potassium chloride. Other side effects can include weak muscles, increased thirst, stomach pain, diarrhea and vomiting. Warnings Potassium chloride should not be take