Cardiac Plexus Quiz

Where is the superficial cardiac plexus located?

• In front of the carina

• Beneath the aortic arch, anterior to right pulmonary artery

• Behind the left atrium

• Within the coronary sulcus

Preganglionic sympathetic fibers for cardiac plexus originate from:

• Cervical spinal cord C3-C5

• T1-T5 intermediolateral cell column

• Medulla oblongata

• Stellate ganglion

Postganglionic sympathetic cell bodies for cardiac plexus are located in:

• Dorsal root ganglia

• Cervical & upper thoracic sympathetic ganglia

• SA node

• Coronary sinus

The parasympathetic contribution to the cardiac plexus is mainly from:

• Glossopharyngeal nerve

• Vagus nerve cardiac branches

• Phrenic nerve

• Sympathetic chain

Pain fibers from ischemic myocardium travel via:

• Parasympathetic vagal fibers

• Sympathetic fibers to T1-T4 spinal segments

• Glossopharyngeal nerve

• Phrenic nerve

Sympathetic stimulation of cardiac plexus results in:

• ↓ HR, ↓ AV conduction

• ↑ HR, ↑ contractility, ↑ conduction

• ↓ Contractility, ↓ relaxation

• No effect on ventricles

Parasympathetic stimulation of cardiac plexus causes:

• Coronary vasoconstriction

• ↓ Heart rate & ↓ AV nodal conduction

• ↑ Ventricular contractility

• Strong relaxation (lusitropy)

Which structure is closely related to the superficial cardiac plexus and important during surgery?

• Superior vena cava

• Aortic arch

• Coronary sinus

• Left atrial appendage

A denervated transplanted heart shows:

• Resting bradycardia

• Resting tachycardia

• Increased HR variability

• Normal anginal pain

The RCA arises from:

• Left aortic sinus

• Right aortic sinus

• Posterior aortic sinus

• Pulmonary trunk