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Nurs 5315: Adv Patho Exam 3 Set 1 | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions $13.48   Add to cart

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Nurs 5315: Adv Patho Exam 3 Set 1 | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions

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Nurs 5315: Adv Patho Exam 3 Set 1 | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions

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  • August 4, 2024
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  • 2024/2025
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  • NURS 5315
  • NURS 5315
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Nurs 5315: Adv Patho Exam 3 Set 1 | Questions & Answers (100 %Score) Latest Updated
2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions




Cardiac Blood Flow - o From body



o Through:

♣ Vena cavas

♣ Right atrium

♣ Tricuspid valve

♣ Right ventricle

♣ Pulmonic valve

♣ Pulmonary artery



o To lungs

♣ Pulmonary vein

♣ Left atrium

♣ Mitral valve

♣ Left ventricle

♣ Aortic valve



o Back to body



Cardiac Anatomy - The heart is the size of a closed fist



2/3 of the heart is to the left of the midline

1/3 under the sternum

, heart layers - Endocardium ( inner)

myocardium ( middle)

Pericardium ( outer)



Cardiac action potential: phase 0 - rapid depolarization

Sodium influx d/t voltage-gated sodium channels opening



Cardiac action potential: phase 1 - initial repolarization of cells

voltage gated sodium channels closed

voltage gated potassium channels open

Potassium leaves cell slowly



Cardiac action potential: phase 2 - plateau phase

voltage gated calcium channels open

influx of calcium into the cell

balances potassium efflux

calcium influx triggers more calcium from sarcoplasmic reticulum > myocardial contraction



Cardiac action potential: phase 3 - Rapid Repolarization w/ potassium efflux

voltage gated potassium channels open

voltage gated calcium channels close



Cardiac action potential: phase 4 - resting membrane potential, -85 mV

High potassium permeability from the potassium channels



Potassium imbalance affect on myocardial action potentials - Hypokalemia-increased atrial preload leads
to 1-3 degree blocks

Hyperkalemia-slows depolarization, leads to sunus bradycardia and junctional rhythm

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