The Normal Width of the QRS Complex Is Which of the Following

question 44

Multiple Choice

The normal width of the QRS complex is which of the following? (Select all that apply.)

• A) 0.06 to 0.10 seconds.
• B) 0.12 to 0.20 seconds.
• C) 1.5 to 2.5 small boxes.
• D) 3.0 to 5.0 small boxes.
• E) 0.04 seconds or greater.

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Definitions:

Precapillary Sphincters

Circular muscles located at the entrance of capillaries that regulate blood flow into the capillary beds.

Capillaries

Microscopic blood vessels that facilitate the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between blood and tissues.

External Jugular Vein

A vein located on each side of the neck that drains blood from the face, neck, and scalp back to the heart.

Superior Vena Cava

A large vein that carries deoxygenated blood from the upper half of the body into the heart's right atrium.