If Both the SA Node and the AV Node Fail

question 65

Multiple Choice

If both the SA node and the AV node fail, what would be the expected outcome of impulse rate within the heart?

• A) The rate would be 30 -40 beats per minute due to the concentration of pacemaker cells in the Purkinje fibers.
• B) The sympathetic nervous system takes over and maintains normal heart rate.
• C) The individual would be in heart failure or have a myocardial infarction due to the lack of a beating heart.
• D) The vagus nerve takes over and maintains a normal heart rate.
• E) The heart is autorhythmic therefore it continually beats even after death because death is defined as a lack of brain waves.

---

Definitions:

Unconscious

The part of the mind that is inaccessible to the conscious thought but that affects behavior and emotions.

Alfred Adler

A psychologist who contributed to the development of psychotherapy and originated theories on inferiority complex.

Carl Jung

A Swiss psychiatrist and psychoanalyst who founded analytical psychology and contributed significantly to the understanding of the psyche, dream analysis, and personality types.

Archetypes

Unconscious psychic structures shared by all people.