16: Anatomy - differential diagnosis of central chest pain Flashcards
1
Q
What does sympathetic stimulation do to the heart?
A
Increases heart rate
Increases force of contraction
2
Q
What does parasympathetic stimulation do to the heart?
A
Reduces heart rate
(note that it has no effect on force of contraction)
3
Q
How do pre-synaptic fibres reach the sympathetic chain from the brain?
A
Spinal cord
4
Q
How do post-synaptic sympathetic fibres reach the heart?
A
Splanchnic nerves
5
Q
The sympathetic innervation of the heart is (unilateral / bilateral).
A
6
Q
How do parasympathetic signals travel to the heart?
A
CN X
Vagus nerve
7
Q
What nerve exerts a continous background force on the heart to slow HR?
What is this force called?
A
Vagus nerve
Vagal tone
8
Q
What remnant of the ductus arteriosus connects the pulmonary trunk to the arch of the aorta?
A
Ligamentum arteriosum
9
Q
A
