Cardiovascular System Thorax 2 pre practical Flashcards
Where is the mediastinum?
The mediastinum lies between the right and left pleurae. It extends from the sternum in front to the vertebral column behind.
What is contained in the mediastinum?
All the organs except the lungs
What are the divisions of the mediastinum?
It is divided into two parts: a superior part and an inferior part.
The inferior part is subdivided into three regions all relative to the pericardium: The anterior mediastinum is in front of the pericardium. The middle mediastinum contains the pericardium and its contents. The posterior mediastinum is behind the pericardium.
What is the contents of the superior mediastinum?
Brachiocephalic vein
Superior vena cava
Arch of aorta
Vagus, phrenic nerves
Trachea
Oesophagus
Thoracic Duct
What does the anterior mediastinum contain?
Thymus
Lymph nodes
Fat
What is contained within the posterior mediastinum?
Oesophagus and vagus nerve
Azygos vein
Sympathetic trunk
Thoracic duct
Descending aorta
Splanchnic nerve
What vertebrae does the heart lie opposite?
Lies opposite middle 4 thoracic vertebrae (T5-8) in recumbent position
Where is the apex of the heart?
5th left ic space, midclavicular line
= l. ventricle
What makes the base of the heart?
Left atrium
What makes up the right border of the heart?
Superior vena cava and the right atrium
What makes up the left border of the heart?
Aortic arch and the left ventricle
What makes up the anterior surface of the heart?
Anterior surface: = r. atrium (1/4),
r. ventricle (2/4), l. ventricle (1/4)
What does the internal thoracic artery give off?
Anterior intercostal arteries
What does the internal thoracic veins receive?
Anterior thoracic veins
What are the main arteries, veins and lymphatics of the chest wall?
Internal Thoracic a.
Gives off anterior intercostal arteries
Internal Thoracic v.
Receives anterior thoracic veins
Descending aorta
Inferior vena cava
Azygos vein
Thoracic duct
How do the IVC and SVC lie with the aorta?
IVC & SVC lie to right of aorta
Aortic “tango” with IVC
Look
Where does the subclavian artery arise from?
The aortic arch
Where does the subclavean artery become the axillary artery?
At the lateral border of the first rib
Where does the axillary artery become the brachial artery?
At the inferior border of teres major
Where does the brachial artery divide into the radial and ulnar arteries?
The cubital fossa
What forms the digital arteries?
Palmar arches in the palm of the hand formed by the radial and ulnar arteries
Where do superficial veins arise on the upper limb?
From the dorsal venous arch on the bac of the hand
What does the cephalic vein do?
Travels up the limb on lateral side. Drains into axillary vein below clavicle
What does the basilic vein do?
Travels up the limb on the medial side
Becomes continuous with brachial veins (deep veins accompanying brachial a.)
(Cephalic - axillary
Basilic - brachial)
What is the median cubital vein?
Median cubital connects cephalic and basilic across cubital fossa
What happens to the external iliac artery in the anterior thigh?
Becomes the common femoral artery
What does the common femoral give off?
Superficial and deep femoral arteries
What happens to the superficial femoral artery?
Popliteal (in the popliteal fossa)
What gives the posterior and anterior tibial artery in the leg?
Popliteal artery
What does the posterior tibial give off?
The fibular artery and continues medially down to plantar surface of foot (= medial & lateral plantar aa)
What does the anterior tibial artery give off?
Ant. tibial continues down anteriorly to dorsum of foot where it becomes dorsalis pedis between 1st & 2nd toes
Where do the superficial veins arise in the lower limb?
Superficial veins arise from dorsal arch of foot
Where does the long saphenous vein travel?
Long saphenous travels up the limb medially to drain into femoral vein