CVS Flashcards
Layers of blood vessels?
Tunica externa
Tunica media
Tunica Intima
Which is the thickest layer of blood vessel?
Tunica media
Which is the thinnest blood vessel?
Capillaries
Which layer of blood vessels change diameter ?
Tunica media
What is the primary function of capillaries ?
Exchange of materials between blood vessels and tissues
Which blood vessel has thinner walls?
Arteries or veins?
Veins.
70% of blood is found in which vessels?
Veins
Where is heart located?
Middle medistinum in the thoracic cavity
Double layer covering of heart is?
Pericardium
Parietal pericardium
Visceral pericardium
What is the main function of pericardium and pericardial fluid ?
Protects heart from shocks and injuries and allows free movement
What are the chamber so the heart?
RA
RV
LA
LV
What are the valves of the heart?
Bicuspid / mitral valve
Tricuspid valve
2 Atrioventricular
Pulmonary valve
Aortic valve
Where is the pulmonary valve ?
RV and pulmonary artery
Where is the aortic valve?
Between LV and aorta
What are the three layers of the heart?
Epicardium
Myocardium
Endocardium
Which chambers are thickest?
Ventricles to push out blood
What divides the chambers of the heart?
Septum’s
Interatrial septum
Inter ventricular septum
Where is the tricuspid valve ?
Between RA
RV
Where is the mitral valve?
Between LA LV
What is the function of valves ?
To ensure unidirectional flow of blood
Which artery is the only artery that carry deoxygenated blood?
Pulmonary artery
Which vein is the only vein that carries oxygenated blood.
Pulmonary vein
Which is the largest artery ?
Aorta
Why is blood flow in human called double circulation?
Blood passes twice through the heart to complete one round
What is pulmonary circulation?
Part of circulation taking place in the lungs
What is systemic circulation?
Part of circulation taking place in the body
What is systole?
Chamber Contraction - blood pumping
What is diastole ?
Chamber relaxation - blood filling
1 heart beat - 1 cardiac cycle.
What are the phases?
Atrial systole > ventricular systole
Atrial diastole > ventricular diastole
Abnormal heart sound is called?
Murmur
Heart sound lub indicates what?
Closure of tricuspid and bicuspid valve
Beginning of systole
What does heart sound dub indicate?
Closure of pulmonary and aortic valve
End of systole
Name the specialized tissue in the heart generating electrical impulses ?
AV node
SA Node
Bundle of his
Purkinje fibres
In which layer of heart is electrical impulses formed ?
Myocardium
What is the pacemaker of the heart?
SA Node
What is the typical heart rate?
72 beats per minute
Time taken for each cardiac cycle or 1 heart beat?
0.8 seconds
What are the 4 stages of cardiac cycle?
Atrial systole
Ventricular systole
Atrial diastole
Ventricular diastole
What are semilunar valves?
Pulmonary valve and aortic valve
S1 is produced by what?
Closure of atrioventricular valves ( tricuspid and bicuspid)
S1= lub
S2 is produced by what?
Closure of semilunar valves (pulmonary and aortic valves )
S2 = dub
What are the abnormal heart sounds or murmurs called?
S3 and S4
What is arrhythmia?
Abnormal heart rhythm
Bradycardia rate?
Slower heart beat
Less than 60bpm
Tachycardia ?
Faster heart beat
More than 100bpm
What are supraventricular arrhythmia?
Atrial fibrillation
Atrial flutter
What is flutter?
Rapid regular rhythm
What is fibrillation?
Rapid irregular rhythm
What is a common form of bradyarrhythmia?
Heart block
What is heart block / AV block?
Failure of proper conduction of heart impulses
What is cardiac arrest?
Sudden stop of heart movement by either due to heart block or fibrillation
What is palpitation?
Racing, posing feeling of heart
What is myocardial infarction?
Heart attack
Blood flow decreases due to coronary vessels malfunction
What is the cardinal symptom of Myocardial Infarction?
Angina Pectoris
What are the two types of myocardial infarction?
STEMI (ST elevation )
NSTEMI ( non ST elevation)
What is coarctation of aorta?
Narrowing of aorta
What is patent ductus arteriosus?
Opening between aorta and pulmonary artery
What is TGA?
Transposition of Great Arteries
Aorta and pulmonary artery are reversed
Atrial septal defect ?
Oxygenated blood flow from
LA to RA
Ventricular septum defect ?
Oxygenated blood flow from LV to RV
Congestive heart failure ?
Inability of LV to contract, blood volume is low
What is blue baby syndrome?
Tetralogy of Fallot
What are the 4 defects of tetrology of fallot?
Pulmonary artery stenosis
Ventricular septal defect
Shift of aorta to right
Hypertrophy of RV
What are the 2 types of hypertension?
Essential hypertension
Secondary hypertension
Essential hypertension range ?
140/90
Aneurysm ?
Outward bulging like a balloon in the vessel on a weak spot
What is atherosclerosis?
Thickening and hardening of vessels caused by plaque buildup
Raynaud phenomenon?
Pallor and numbness in fingers and toes due to temporary constriction of arterioles of skin
Varicose veins?
Swollen twisted veins in the leg due to damaged valves
PAD?
Peripheral vascular disease
Block of blood vessels in lower extremities due to atherosclerosis
What is stenosis ?
Valves don’t open properly
What is regurgitation ?
Valves don’t close properly
What is atresia?
Valves don’t form properly
What are the cardiac markers ?
Troponin ( heart muscle damage, MI)
Creatinine- kinase ( hear muscle damage )
Myoglobin ( heart attack)
CRP ( inflammation, atherosclerosis)
What is endocarditis?
Inflammation of endocardium
Caused by bacteria
What is myocarditis?
Inflammation of myocardium
What is pericarditis?
Inflammation of pericardium
What Is CABG
Coronary Artery Bypass Graft
Surgery to bypass blood supply from blocked vessel