Cardio booklet Flashcards
What arteries are found in the superior mediastinum?
Aortic arch
Brachiocephalic artery
Left common carotid artery
Left subclavian artery
What veins are found in the superior mediastinum?
Brachio cephalic vein
Upper half of SVC
What nerves are found in the superior mediastinum?
Vagus
Phrenic
What are the three divisions of the superior mediastinum?
Anterior
Middle
Posterior
What is found in the anterior mediastinum?
Thymus
Thoracic duct
What is found in the posterior mediastinum?
Descending aorta Oesophagus Thoracic duct Azygous vein Sympathetic chain
What is found in the middle mediastinum?
Heart
Pericardium
Great vessels
What is the surface marking of the apex of the heart?
5th rib intercostal space on left
Mid-clavicular line
What chambers form the anterior surface of the heart?
R. Atrium
R. Ventricle
L. Ventricle
Which chambers form the posterior (base) surface of the heart?
L. Atrium
What chambers make up the inferior surface of the heart?
R. Ventricle
L. Ventricle
What vertebrae is the heart anterior to?
T5 to T8
At what level does the aortic arch terminate?
T4
At what level does the abdominal aorta bifuricate?
L4
At what level do the common iliac arteries bifuricate?
L5
What are the three main tributaries to the SVC?
Left/right subclavian
Azygous vein
What are the two main tributaries of the inferior vena cava?
Left/right common iliac veins
Out of radial and ulnar arteries, which is more superficial?
Radial artery
What artery is the dorsal pedis a continuatin of?
Anterior tibial artery
Inferior to what does the posterior tibial artery enter the sole of the foot?
Medial malleolus
Into what vein does the great saphenous vein drain?
Femoral vein
Into what vein does the small saphenous vein drain?
Popilteal vein
What are the three layers of the pericardium?
Fibrous
Parietal
Epicardium (viceral layer)
What are the three layers of the heart?
Endocardium
Myocardium
Epicardium
What is the endocardium composed of?
Single layer of squamous epithelium
What is the myocardium composed of?
Many layers of cardiac muscle
What is the epicardium composed of?
Squamous epithelium
Single layer
What is the protective role of the fibrous pericardium?
Protects heart from over expansion
What is cardiac tamponade?
Where excess fluid accumulates in the pericardial cavity
Impedes hearts ability to contract/expand
Which layers of the pericardium are inervated by pain fibres?
Fibrous + partiertal pericardium
Where does the visceral pericardium recieve innervation from?
Autonomic innervation from T1-T4
Vagus
Where does the Fibrous + partiertal pericardium recieve innervation from?
Phrenic nerve
What does the left atrium lie anterior to?
Oesophagus
Which chamber forms the apex of the heart?
Left ventricle
What is the fossa ovalis a remnant of?
Foramen ovale
What was the function of the foramen ovale?
To shunt blood from one side of the heart to the other to bypass pulmonary circulation
What is the function of the moderator band (septomarginal trabeculum)
Transfers electrical signals to papillary muscles
How many papillary muscles are there in the right ventricle?
Three
What is the function of the chordae tendineae?
Stop inversion of the valve
What veins drain the heart?
Cardiac veins
Drain into coronary sinus (feeds to right atrium)
From where do the coronary arteries arise?
Ascending aorta
Which pair of arteries anastomose in the interventricular sulcus?
Anterior interventricular artery
Posterior interventricular artery
What areas does the right coronary artery supply?
Right atrium
Right ventricle
AV node + bundle
SA node
What areas does the left coronary artery supply?
Both ventricles + interventricular system
Left atrium
Sino atrial nodes
Where is the great cardiac vein located?
Inside the anterior interventricular groove
Lies alongside the anterior interventricular artery
Where is the middle cardia vein located?
Lies in the posterior cardiac groove
Lies alongside the posterior interventricular artery
Where is the small cardiac vein found?
On the right, inferior margin of the heart
Alongside marginal artery
Where is the coronary sinus found?
Posterir surface of heart in the coronary sulcus
Alongside circumflex artery
What are the venae cordis minimae?
Small veins that drain the heart wall directly into each chamber of the heart
Where is the SAN found?
Near the opening of the SVC in the right atrium
Where is teh AVN found?
Lies in the inferior part of the interatrial septum
Where is the bundle of his found?
Lies on each side of the interventricular septum
Why is pain felt in the medial part of the left arm during ischaemia?
The dermatome extends medially to arm
T3
What type of artery is the aorta/pulmonary trunk?
Conducting
Elastic
What type of arteries are the radial/femoral arteries?
Conducting
Muscular
What type of arteries are arterioles?
Distributing
Muscular
What are the anatomical relations of the heart?
Anterior - sternum and costal cartilage 4-7
>Anterior edges of lungs
Thmic remenants
Posterior
>Oesophagus
>Desc aorta
>Thoracic vertebrae 5-6
Laterall - lungs/phrenic nerve