The heart

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Where do the left and right coronary arteries originate from?
The base of the ascending aorta
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Where is the trabecular carnae located?
The right ventricle
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What is the name of the vessel in the posterior of the heart where blood from the coronary circuit collects?
The coronary sinus
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What valve does blood moving from the left atrium to left ventricle flow through?
The mitral valve
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Whta valve is found between the right atrium and right ventricle?
The tricuspid valve
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What layer of the heart wall is the visceral pericardium?
The epicardium
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What does the left coronary artery supply blood to?
Anterior interventricular artery and circumflex branch
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What is the function of the chordae tendinae?
To anchor the AV valve flaps and prevent back flow of blood into the atria
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What is the condition called when movement of the heart is restricted due to production of pericardial fluid?
Cardiac tamponade
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On an ECG what feature shows repolarisation of ventricles?
T wave
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Which valves are forced open during the QRS wave?
Semilunar valves
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Why is it important that cardiac muscle cannot be tetanised?
A heart in tetany cannot pump blood
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What could increased sympathetic stiulation of the heart lead to?
Trachycardia
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What could a P-R interval longer than 200msecs indicate on an ECG?
Damage to the AV node or internodal pathways
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Why cant the heart be tetanised like skeletal muscles?
Cardiac muscle has a long absolute refractory period
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On an ECG what feature represents the depolarisation of the atria?
The P wave
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What is the coordinated contraction of atrias and ventricles allowed by?
Intercelated disks
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What is a slow heart rate also known as?
Bradycardia
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What is the first sound of a heart beat 'lubb' sound due to?
The closing of AV valves
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What location on the sternum would you hold a stethoscope when trying to listen to the aortic valve?
The right side
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What is isovolumetric relaxation?
All valves closed and the ventricular myocardium is relaxed
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What happens at the end of the t wave?
The aortic valve closes
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Which valve opens at the end of the QRS complex?
The aortic valve
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What happens during isovolumetric contraction?
No blood is ejected from the ventricles
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What is the name for the blood which is left in the ventricle after ventricle systole?
End systolic volume
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What is meant bu the cardiac reserve?
The difference between resting cardiac output and maximum cardiac output
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What is the potential problem if the heart beats too fast?
Filling time is decreased
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What is meant by the word preload?
Amount the ventricle stretches in diastole
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Other cards in this set

Card 2

Front

Where is the trabecular carnae located?

Back

The right ventricle

Card 3

Front

What is the name of the vessel in the posterior of the heart where blood from the coronary circuit collects?

Back

Preview of the front of card 3

Card 4

Front

What valve does blood moving from the left atrium to left ventricle flow through?

Back

Preview of the front of card 4

Card 5

Front

Whta valve is found between the right atrium and right ventricle?

Back

Preview of the front of card 5
View more cards

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