Middle Mediastinum, Pericardium, Heart Flashcards
The inter-pleural space in the thorax is called the?
Mediastinum
The mediastinum is bounded laterally by?
Pleural cavities
The mediastinum is bounded anteriorly by?
Sternum and transverses thoracis muscles
The mediastinum is bounded posteriorly by?
Vertebral column
The mediastinum is bounded caudally by?
Diaphragm
The two divisions of the mediastinum are?
Superior
Inferior
The inferior mediastinum is further divided into?
Anterior
Middle
Posterior
The anterior border of the middle mediastinum is?
Anterior margin of pericardium
The posterior border of the middle mediastinum is?
Posterior margin of pericardium
The lateral border of the middle mediastinum is?
Mediastinal pleura of the lungs
The superior border of the middle mediastinum is?
Imaginary line between sternal angle and T4 vertebrate
The inferior border of the middle mediastinum is?
Superior surface of the diaphragm
The contents of the superior mediastinum are?
Superior thoracic inlet Sternal angle of Louis Great vessels Ligaments arteries Cardiac plexus Trachea Phrenic nerve
The contents of the anterior mediastinum are?
Pericardium Sternum Thymus Lymph nodes Branches of the internal thoracic vessels
The contents of the posterior mediastinum are?
Posterior part of the pericardium and vertebrae(T4-T12)
Thoracic aorta
Oesophagus
Continuous with the superior mediastinum
The space bounded by the anterior and posterior parts of the pericardium is called?
Middle mediastinum
The contents of the middle mediastinum are?
Heart Phrenic nerve Pericardium Roots of the great vessels Arch of the azygos vein Main bronchi
The great vessels are the?
Aorta
Pulmonary arteries and veins
Vena cavae
A fibroserous membrane that encloses the heart and other aspects of the great vessels is called?
Pericardium
Pericardium is divided into?
Fibrous pericardium
Serous pericardium
The pericardium that is continuous with the central tendon of the diaphragm and blends with the adventitia of the great vessels roots is called
Fibrous pericardium
The pericardium that is further divided into parietal and visceral layer is called?
Serous pericardium
The two layers of the pericardium are divided by two sinuses called the?
Transverse
Oblique
The fibrous pericardium is attached anteriorly to the __1__ by __2__
- Posterior surface of the sternum
2. Sternopericardial ligaments
The function of Sternopericardial ligaments is to?
Retain the heart in its position in the thoracic cavity
The fibrous pericardium is supplied by the?
Pericardiacophrenic branches of the ITA
Thoracic aorta
Bronchial and oesophageal arteries
Musculophrenic branches of the ITA
The arterial supply for the serous pericardium is the?
Pericardiacophrenic Thoracic aorta Bronchial and oesophageal arteries Musculophrenic Inferior phrenic arteries
The nerve supply of the serous pericardium are the?
Vasomotor and sensory fibres from the phrenic and vagus nerves and sympathetic trunk
The potential space between the visceral and parietal layer of the serous pericardium is the?
Pericardial cavity
The transverse sinus lies posteriorly to the?
Ascending aorta and pulmonary trunk
The transverse sinus lies anteriorly to the?
SVC
The transverse sinus lies superior to the?
Left atrium
Pulmonary veins
The oblique sinus is surrounded by the reflection of the?
Serous pericardium around the right and left pulmonary veins and IVC
The pericardial sinuses are subdivisions of the?
Pericardial sac
The fibrous pericardium’s nerve supply by the?
Phrenic nerve
The venous drainage of the pericardium is the?
Azygos venous system
Four clinical correlates of pericardium are?
Pericarditis
Cardiac tamponade
Pericardial effusion
Pericardiocentesis
An inflammation of the pericardium, which may result in cardiac tamponade, pericardial effusion, pericardial murmur and precordial and epigastric pain is called?
Pericarditis
A blockage of blood flow to the heart muscle is called?
Heart attack(myocardial infarction)
Sudden, unexpected loss of heart function, breathing and consciousness is called?
Cardiac arrest
Pericardial murmur or pericardial friction rub sounds like__1__ which can be heard on __2__
- The rustle of silk
2. auscultation
An Acute compression of the heart caused by accumulation of fluid or blood in the pericardial cavity from wounds to the heart is called?
Cardiac tamponade
Accumulation of fluid in the pericardial space resulting from inflammation caused by acute pericarditis is called?
Pericardial effusion
A surgical puncture of the pericardial cavity to remove excess fluid using a syringe is called?
Pericardiocentesis
In pericardiocentesis the needle misses the lungs and pluera, but penetrates the pericardium because of the?
Cardiac notch
A mixed motor/sensory nerve which originates from the ventral Rami of C3-C5 is called?
Phrenic nerve
The two branches of the phrenic nerve are the?
Right phrenic nerve
Left phrenic nerve
The phrenic nerve supplies the?
Diaphragm
The heart is _____ in shape
Trapezoidal
The heart lies ____ in the middle mediastinum of the thorax
Obliquely
The heart is the size of a ____
Cupped fist
The weight of the heart in men is?
300-350g
The weight of the heart in women is?
250-300g
The four chambers of the heart are the?
Left and right atria
Left and right ventricles
The muscular pump responsible for blood circulation is called?
The heart
The heart has ____ borders
4
The right border of the heart is the?
Right atrium
The left border of the heart is the?
Mainly the left ventricle
Partly the auricular appendage of the left atrium
The inferior border of the heart is the?
Mainly by the right ventricle
Partly by the lower part of the right atrium and thee apex of the left ventricle
The heart has five surfaces namely?
Anterior Inferior Posterior Right pulmonary surface Left pulmonary surface
Anterior (or sternocostal) surface of the heart is the?
Right ventricle.
Posterior (or base) surface of the heart is called the?
Left atrium.
Inferior (or diaphragmatic) surface of the heart is the?
Left and right ventricles.
Right pulmonary surface of the heart is the?
Right atrium
Left pulmonary surface of the heart is the?
Left ventricle
Right border of the heart is the?
Right atrium
Inferior border of the heart is the?
Left ventricle and right ventricle
Left border of the heart is the?
Left ventricle (and some of the left atrium)
Superior border of the heart is the?
Right and left atrium and the great vessels
The sulci of the heart are divided into two namely?
The coronary sulcus (external)
Anterior and posterior interventricular sulci
The sulcus that separates the atria from the ventricles is the?
Coronary sulcus
The contents of the coronary sulcus are the?
Right coronary artery
Small cardiac vein
Coronary sinus
Circumflex branch of the left coronary artery
The sulci that separate the two ventricles on the anterior and diaphragmatic (inferior) surface respectively is called?
Anterior and posterior interventricular sulci
The contents of the anterior interventricular sulcus are the?
Anterior interventricular artery
Middle cardiac vein
The contents of the posterior interventricular sulcus are the?
Posterior interventricular artery
Middle cardiac vein
One third of the heart lies to the right of the?
Midline
The right border of the heart extends from the right __1___ to the right __2__
- 3rd costal cartilage
2. 6th costal cartilage
The inferior border of the heart extends from the right __1__ to the left __2__
- 6th costal cartilage
2. 5th intercostal space also forming the apex
The apex of the heart is formed by the?
Inferolateral part of the Left Ventricle
The apex of the heart lies posteriorly on the surface of the?
5th intercostal space and mid clavicular line
The mitral valve closure (HS1) is loudest at the?
Apex of the heart
The base of the heart is formed by the?
Right atrium
The base of the heart receives the?
Superior Vena Cava
Inferior Vena Cava
The base of the heart is the posterior aspect of the heart bordering the?
Bodies of the vertebrae T6-T9
The right atrium receives blood from the whole body except the?
Pulmonary veins
The right atrium is __1__ than the left atrium, buy has a __2__ wall
- Larger
2. Thinner
The right atrium has __1__ anteriorly and a __2__ posteriorly
- Rough wall
2. Smooth wall
The anterior rough wall is made up of the?
Atrium proper
Auricle
Pectinate muscles
The posterior smooth wall is made up of the?
Sinus venarum
Superior and inferior Vena Cava
The right atrium contains the ___1__ of the IVC and the __2__ of the coronary sinus
- Eustachian valve
2. Thebesian valve
The features of the right atrium are?
Right auricle Sinus venarum(Sinus venarum cavarum) Pectinate muscles Crista terminalis Fossa ovalis Venae cordis minimae
A conical muscular pouch of the upper anterior portion of the right atrium that covers the first part of the right coronary artery is called?
Right auricle
A smooth wall posteriorly separated from the muscular atrium by the crista terminalis is called?
Sinus venarum
Prominent ridges of atrial myocardium located in the interior of both auricles and the right atrium is called?
Pectinate muscles
A vertical muscular ridge that separates the sinus venarum from the right atrium proper is called?
Crista terminalis (provides the origin for the pectinate muscles)
The smallest cardiac veins are called?
Venae cordis minimae
An oval shaped depression in the inter atrial septum is called?
Fossa ovalis
The sulcus terminalis marks the?
Vena Cava
The left atrium has ___ walls than the right atrium
Thicker
The left atrium has ___ walls
Smooth
The left atrium is the most ____ of the four chambers
Posterior
The left atrium lies __1__ to the right atrium and__2__ to the oesophagus
- Posterior
2. Anterior
The left and right _____ enter the left atrium witj oxygenated blood
Pulmonary veins
The left atrium empties blood into the left ventricle via a ____
Bicuspid(mitral) valve
The right ventricle makes up the major portion of the ____ of the heart
Anterior(sternocostal) surface
The features of the right ventricle are?
Trabeculae carneae cordis Papillary muscles Chordae tendineae Conus arteriosus(infundibulum) Interventricular septum Septomarginal trabecula(moderator band)
Anastomosing muscular ridges of myocardium in the ventricles are?
Trabeculae carneae cordis
Cone shaped muscles enveloped by the endocardium are?
Papillary muscles
Extension from one papillary muscles to more than one cusp of the tricuspid valve is called?
Chordae tendineae
The upper smooth walled portion of the right ventricle that leads to the pulmonary trunk is called?
Conus arteriosus(infundibulum)