Cardiac Factoids

Question 1

What defines the beginning of the coronary sinus?

Answer 1

when the oblique vein of left atrium merges with great cardiac vein

Question 2

What structure is a remenant of the embryonic left SVC?

Answer 2

oblique vein

Question 3

What structure initiates and regulates impulses and contractions of the heart?

Answer 3

SA Node

Question 4

What it the role of the AV bundle?

Answer 4

bridge between atrial and ventricular myocardium

passes from av node through fibrous skeleton of heart and membranous part of IVS

Question 5

What effect does sympathetic stimulation have on the heart?

Answer 5

INCREASED:
Heart Rate
Impulse Conduction
Force of Contraction
Flow through Coronary Vessels

Question 6

What nerve is associated with sympathetic stimulation of the heart?

Answer 6

Splanchnic nerve

Question 7

What nerve is associated with parasympathetic stimulation of the heart?

Answer 7

vagus nerve

Question 8

What effect does parasympathetic stimulation have on the heart?

Answer 8

DECREASED:
Heart Rate
Force of Contraction

Constriction of Coronary arteries