Cardiopulmonary Flashcards
What’s the preload?
Amount of blood in ventricle at end of diastole (LVEDV)
–> RIGHT BEFORE CONTRACTION
What’s the afterload?
Force the LV must generate to overcome aortic pressure
Stroke volume
Amount of blood ejected with each contraction
Ejection fraction
% of blood ejected from total volume of ventricle
Normal= 55-75%
Normal CV response to exercise
O2 up linearly
HR up linearly
SBP up linearly
DBP limited changes +-10mmHg
Tidal Volume and Resp rate up
Isolated UE vs. LE exercise response
UE>LE response in HR/BP in exercises
-> more mass in LE + UE exercises causes vasoconstriction in LE-> incr. HR/BP
Abnormal Responses to Exercise
(Yellow Flag)
Moderate to severe/increasing angina
Marked dyspnea 3-4/4
Dizziness/lightheadedness/ ataxia
Cyanosis/ excessive fatigue/ claudication/ blunted BP response/ hypertensive BP(>240/10)/ SBP drop of 10-15/significant EKG change
Normal Vagus Nerve activation causes
Parasympathetic inner action
Decrease BP/HR
Abnormal causes for Vagus Nerve activation
Valsalva Maneuver
Carotid sinus massage
Excessive Pain (shock)
“If it’s less than 8, don’t ambulate”, refer to?
Hemoglobin
“Tri before you bi”, refers to
Tricuspid and bicuspid valve
Normal Heart Rate newborn
120-140
Normal Heart rate >18years
60-100
S1 sound
=normal Heart sound
AV valve closure (=onset systole)
S2 Heart sound
= normal
Semilunar valve/pulmonary-aortic closure
= Onset diastole