A Single Fraction of Radiation to a Brain Metastasis Would

question 17

Multiple Choice

A single fraction of radiation to a brain metastasis would be what kind of stereotactic treatment?

• A) Stereotactic radiation therapy (SRT)
• B) Stereotactic body radiation therapy (SBRT)
• C) Stereotactic radiosurgery (SRS)

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Definitions:

AV Node

AV Node (Atrioventricular Node) is a component of the heart's electrical system that delays the transmission of electrical impulses to the ventricles to ensure proper timing of heart contractions.

P Wave

The initial wave on an electrocardiogram representing atrial depolarization, or the electrical activity that triggers atrial contraction.

QRS Complex

A series of deflections in an electrocardiogram representing the electrical activity associated with the ventricular contraction.

Ventricular Contraction

The phase of the cardiac cycle where the ventricles contract, pumping blood out of the heart into the pulmonary and systemic circuits.