3 Flashcards
1
Q
What is the equation for cardiac output?
A
Cardiac output = heart rate x stroke volume
2
Q
What is the cardiac output of a normal adult?
A
~4.7 litres per minute
3
Q
What do catecholamines do?
A
Increase both the heart rate and stroke volume during physical activity
4
Q
What is the equation for blood pressure?
A
Blood pressure = cardiac output x total peripheral resistance
(Peripheral resistance is affected by the size and length of the artery)
5
Q
When is the myocardium perfused?
A
During diastole, as the aortic valves aren’t covering the entrance to the coronary arteries at that time
6
Q
How much of the heart muscle does the LAD supply?
A
2/3
7
Q
What does occlusion of the right coronary artery affect?
A
Less blood to the AV and SA nodes leading to arrhythmias and a slower heart beat
