Decreased heart rate

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This picture shows sinus bradycardia seen in lead II with a heart rate of about 50.

Decreased heart rate or bradycardia is described as a heart rate that is lower than the normal heart rate at rest. The average healthy human heart normally beats 60 to 100 times a minute when a person is at rest. When the heart rate fluctuates to lower levels under 60 BPM, it is described as bradycardia or an abnormally low heart rate.

It can also be a psychological effect, such as a natural response to feelings of relaxation and serenity. This is a common effect of sedating substances especially depressants such as benzodiazepines or opioids.

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