All of the following may be associated with a "heart block" except:

A) section of the superior part of the thoracic sympathetic trunk.
B) coronary artery disease.
C) loss of synchrony between atrial and ventricular contractions.
D) use of an artificial pacemaker.
E) ventricular fibrillation.


Ans: A

Anatomy & Physiology

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Identify the structure labeled "3."

Anatomy & Physiology