Basics: Difference between revisions

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The origin of the '''U wave''' is unknown. This wave possibly results from "afterdepolarizations" of the ventricles.
The origin of the '''U wave''' is unknown. This wave possibly results from "afterdepolarizations" of the ventricles.


{{Box|
The letters "Q", "R" and "S" are used to describe the QRS complex:
The letters "Q", "R" and "S" are used to describe the QRS complex:
*Q: the first negative deflection after the p-wave. If the first deflection is not negative, the Q is absent.
*Q: the first negative deflection after the p-wave. If the first deflection is not negative, the Q is absent.
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*R`: is used to describe a second R-wave (as in a [[RBBB|right bundle branch block]])
*R`: is used to describe a second R-wave (as in a [[RBBB|right bundle branch block]])
See figure for some examples of this.
See figure for some examples of this.
}}
{{clr}}
{{clr}}