Cardiology Flashcards
describe S1
closure of the mitral and tricuspid valves
describe S2
closure of the aortic and pulmonary valves
describe the Levin scale for grading cardiac murmurs
1; very faint 2; heard by a non-expert in optimum conditions 3; easily audible 4; thrill present 5; very loud and heard over a wide area 6; heard without a stethoscope
what are the features of aortic stenosis?
ejection systolic murmur (heard shortly after S1) in the aortic region
commonly radiates to carotid arteries
loudest on expiration and when sitting forward
slow rising pulse
narrow pulse pressure
heaving apex beat
reduced, absent or splitting S2
what are the causes of aortic stenosis?
calcification of the aortic valve
congenital disorder
rheumatic heart disease
what are the features of mitral regurgitation?
pan systolic murmur in the mitral region radiating to the carotid arteries loudest using the bell loudest during expiration displaced, hyperdynamic apex beat
what is the definition and causes of a pansystolic murmur?
heart throughout systole
mitral regurgitation
tricuspid regurgitation
ventricular septal defects
what are the causes of aortic regurgitation?
congenital rheumatic heart disease infective endocarditis aortic dissection CT disorders aortitis
what are the features of aortic regurgitation?
early diastolic murmur loudest at aortic area loudest during expiration Austin-Flint murmur displaced apex beat collapsing pulse
what are the causes of mitral stenosis?
rheumatic heart disease congenital left atrial myxoma CT disorders Mucopolysaccharidosis
what are the features of mitral stenosis?
low pitched, rumbling, mid-diastolic murmur
loudest over the apex
loudest on expiration
low volume, irregularly irregular pulse (AF)
loud S1 with tapping apex beat
malar flush
define heart failure
the inability of the heart to maintain cardiac output to meet the metabolic demands of the body
define cardiac output
the volume of blood pumped from each ventricle per minute
SV x HR
define stroke volume
the amount blood ejected with each heart beat ml/beat
EDV - ESV
define ejection fraction
SV/EDV x 100
define preload
maximum cardiomyocyte stretch at EDV
define afterload
pressure against which the ventricle contracts
define the Frank Starling curve
as preload increases, SV increases
until a maximum
higher is increased inotropy and lower is reduced inotropy
define HFrEF
the left ventricle is filled with blood but is only able to pump up to 40% before refilling
LVEF <40%
define HFpEF
the left ventricle has stiff and thick walls
even though it pumps all of its volume it is not enough to meet the body’s needs
loss of active diastolic relaxation
LVEF >50%
what are the causes of HFrEF?
IHD old MI alcohol/toxins chemotherapy dilated CMP valvular HD
what are the causes of HFpEF?
HTN
hypertrophic CMP
restrictive CMP
what are the causes of high output HF?
anaemia thyrotoxicosis; increased T4 sepsis AV fistula liver disease Paget's disease
what are the signs and symptoms of heart failure?
raised JVP rales bilateral ankle oedema murmur laterally displaced apex beat orthopnoea/PND increased BNP weight loss; high levels of interleukins poor mood fatigue 3rd HS gallop rhythm