Heart Flashcards
1
Q
What are the 4 chambers of the heart and their capacities?
A
- Right atrium —> 100 ml
- Right ventricle —> 150
- Left atrium —> 110
- Left ventricle —> 175
2
Q
What are the 4 great vessels of the heart and their pressure?
A
- Aorta —> 100-120 mmHg
- Pulmonary artery —> 10-20
- Vena cava —> 5-10
- Pulmonary vein —> 10-15
3
Q
How does blood flow in the heart?
A
Vena cava —> right atrium —> tricuspid valve —> right ventricle —> pulmonary valve —> pulmonary artery —> lungs —> pulmonary vein —> left atrium —> mitral valve —> left ventricle —> aortic valve —> aorta —> body
4
Q
What are the 4 valves of the heart?
A
- Tricuspid - right atrium and ventricle
- Pulmonary - right ventricle and pulmonary artery
- Mitral - left atrium and ventricle
- Aortic - left ventricle and aorta
5
Q
What is the pathway of electrical signals in the heart? (5)
A
- Sinoatrial node
- Internodal tracts
- Atrioventricular node
- Bundle of His
- Purkinje fibres
6
Q
What are the 2 electrical nodes of the heart?
A
- SA node = sinoatrial node
- primary pacemaker —> 60-100 bpm
- location: opening of superior vena cava - AV node = atrioventricular node
- secondary pacemaker —> Ca2+ AP
- location: triangle of Koch
7
Q
Which 3 arteries supply the heart?
A
Right coronary artery
Left coronary artery —> circumflex artery
—> left anterior descending
7
Q
Which 3 veins supply the heart?
A
Great cardiac vein
Middle cardiac vein
Coronary sinus
