Shared Flashcard Set

Details

Cardio Final Exam Clusterfuck
N/A
13
Medical
Professional
05/16/2014

Additional Medical Flashcards

 


 

Cards

Term
Normal pulmonary pressures vs. aortic pressures
Definition
Pulmonary = 25/10

Aortic = 120/80
Term
How much O2 delivered to tissues per minute?
Definition
1 L/min

250 mL of O2 per L of blood and cardiac output is 5 L/min
Term
How much O2 is consumed by tissues per minute?
Definition
250 mL/min

Tissues consume 25% of O2 delivery (assume arterial is 100% and venous is 75% saturated with O2)
Term
Largest pressure drop in vasculature occurs...
Definition
Across arterioles (greatest peripheral resistance to flow; regulate microvascular flow)
Term
Which JVP wave is seen in atrial systole vs. atrial filling?
Definition
Atrial systole = a wave

Atrial filling = v wave (right before AV valves open)

**NB: c wave seen during isovolumic contraction, NOT ventricular systole
Term
At what point in cardiac cycle is S1 vs. S2 heard?
Definition
S1 = during isovolumic contraction

S2 = during isovolumic relaxation (atrial filling)
Term
When is S3 vs. S4 heard?
Definition
S3 = early diastole; due to rapid filling of ventricle and dilated chamber

S4 = late diastole; caused by atrial contraction against non-compliant ventricle
Term
What happens to PV Loop in systolic vs. diastolic failure?
Definition
Systolic failure - get dilation of ventricle and increased EDV, decreased stroke volume and ejection fraction; shifts curve to the RIGHT

Diastolic failure - get non-compliant ventricle; VERTICALLY compresses curve (volumes stay the same)
Term
What causes increase in diastolic pressure across SL valves?
Definition
Competency of the valves - increases only diastolic pressure across valve

**With insufficiency/regurg of SL valves, see DECREASED diastolic pressure (widened pulse pressure)
Term
What are causes of widened/increased vs. decreased pulse pressure
Definition
Wide PP - vasodilation, aortic regurg, atherosclerosis of aorta

Narrow PP - shock, CHF, aortic stenosis
Term
Dicrotic Notch represents...
Definition
Closing of aortic valve
Term
What are the JVP waveforms:
Definition
a wave = atrial contraction
c wave = isovolume contraction
X descent = atrial relaxation + ventricular systole
v wave = atrial filling
Term
What 3 things is the stroke volume dependent on?
Definition
Preload, Afterload, Contractility
Supporting users have an ad free experience!