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Rylie Shared "physiology unit 2" - 7 Picmonics

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physiology unit 2

Myocardium Action Potential
Phase 0
Rapid Depolarization
Influx of Sodium
Phase 1
Early Repolarization
Efflux of Potassium
Phase 2
Plateau
Influx of Calcium
Phase 3
Rapid Repolarization
Massive Potassium Efflux
Phase 4
Resting Phase
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2 mins
Cardiac Pacemaker Action Potential
Phase 0
Depolarization
Rapid Influx of Calcium
Phase 3
Repolarization
Potassium Efflux
Phase 4
Depolarization
Slow Influx of Sodium
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2 mins
Capillary Fluid Exchange
Capillary Hydrostatic Pressure
Interstitial Hydrostatic Pressure
Plasma Oncotic Pressure
Interstitial Fluid Oncotic Pressure
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46 secs
Alveolar Gas Exchange
Characteristics
Pulmonary Artery Blood is O2-Poor, CO2-Rich
Two-Cell Thick Air-Blood Barrier
CO2 Diffuses Into Air
O2 Diffuses Into Blood
Gases Equilibrate
Pulmonary Vein is O2-Rich, CO2-Poor
Thermoregulation
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2 mins
Physiologic Dead Space (VD)
Tidal Volume (Vt)
Partial Pressure of Arterial CO2 (PaCO2)
Partial Pressure of CO2 in Expired Air (PECO2)
VD = VT x (PaCO2-PECO2) / PaCO2
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2 mins
A-a Gradient
Partial pressure of alveolar oxygen (PAO2)
Partial Pressure of Arterial O2 (PaO2)
Normal 10 to 15 mmHg
Hypoxemia with an Abnormal A-a Gradient
Diffusion problem
Shunting (Low V/Q)
Dead space (high V/Q)
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1 min
Atrioventricular Block Types
First Degree
First Degree
PR Interval > 200ms
No Treatment Needed
Second Degree
Second Degree
Mobitz I (Wenckebach)
Progressive PR Interval Lengthening with Nonconducted QRS Complex
Mobitz II
Constant PR Interval with Nonconducted QRS Complex
Third Degree
Third Degree
Atrioventricular Dissociation
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3 mins

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