Atrial Contractions

Ali S asked:


1. What is an infarcted area?
2. The pressure on arteries during contraction is called?
3. The heart muscle is surrounded by?
4. A misfiring of the heart by its electrical system is known as?
5. Healthy arteries will __________?
6. Diabetes can contribute to heart disease by slevating? (maybe elevating)
7. Following an M.I. you may be left with fluid in the ____ or _____?
8. What is the standard name for clot?
9. A dead portion of the heart?
10. Double beat of atrial portion of heart?
11. When your blood is not able to clot it is called?
12. When the arteries are full of blood?

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Doctor asked:


1)walls of arteries composed of layers of muscle and elastic fibers that allow for contraction/expansion during heart cycle, aorta must be able to compensate for flow and is considered:
a) elastic artery b)fenestrated blood vessel c) muscular artery d) meta-arteriole
2)in a true capillary bed, this vessel connects artery to vein:
A)bundle of his b) thoroughfare channel c) vasomotor center d) mitral valve
3) what is normal cardiac output for person with heart rate of 75bpm
4)contracted cycle of heart begins with contraction of atrium due to stimulation from brain. this contraction is _____
5) asynchronous closing of atrioventricular valves would most likely be associated with
a) mitral valve prolapse b) atrial flutter c) heart murmur d) av valve stenosis

any help is appreciated

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fallen*angel asked:


Which waves on the ECG show precisely atrial and ventricular contraction? I know what each wave stand like for, like the P wave for atrial depolarisation, QRS ventricular depolarisation etc. I just can’t think whether contraction actually happens during depolarisation or after depolarisation?

Thanks!

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