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WorksheetsCardiac Plexus Quiz
Total questions: 16
Worksheet time: 8mins
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
The LAD artery supplies:
Right atrium only
Posterior 1/3 IV septum
Anterior 2/3 IV septum and anterior wall of LV
Diaphragmatic surface of RV
The AV nodal artery arises from RCA in approximately:
20% of cases
50% of cases
80-90% of cases
100% of cases
The coronary sinus opens into:
Left atrium
Right atrium near IVC opening
Right ventricle
Pulmonary trunk
Which vein runs with LAD in anterior IV groove?
Middle cardiac vein
Great cardiac vein
Small cardiac vein
Oblique vein of Marshall
Which veins bypass coronary sinus and open directly into right atrium?
Great cardiac veins
Anterior cardiac veins
Middle cardiac vein
Thebesian veins
Myocardial infarction usually results from:
Gradual venous occlusion
Sudden block of a major coronary artery branch
Blockage of pulmonary artery
Gradual narrowing of Thebesian veins
