HNN319 Lecture Notes - Lecture 1: Aortic Valve, Tricuspid Valve, Ascending Aorta
27 Jun 2018
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Week 3: Medications affecting the heart.
Learning outcomes:
Explain the role of the autonomic nervous system
Define the terms parasympathetic, sympathetic, muscarinic, nicotinic,
agonist and antagonist
Identify the major classes of cardiac agents affecting conduction and
contractility and examples of medications found in each
oBeta blockers
oAntiarrhythmic
oCalcium channel blockers
oElectrolytes
Briefly describe the actions of each major class (one to two sentences)
Identify significant adverse drug reactions (ADRs) for each drug class
Explain relevant nursing actions to manage risk when administering
these medications
Synthesise knowledge to inform clinical decision making for patient
assessment, education and evaluation
Demonstrate evidence-based practice in medication documentation.
Cardiac medications that affect the heart:
Cardio vascular perfusion:
-Pump refers to heart’s ability to contract.
-Vessel diameter: vasoconstriction/dilation
-Fluid contents: volume.
Antagonist:
-Cannot bind to cell receptor (lock and key) and therefore no action
will occur to the cell.
Agonist:
-Binds and stimulates the cell receptor, thus producing cellular
response.
find more resources at oneclass.com
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Autonomic nervous system:
Branch of peripheral nervous system that regulates functioning of organs and
includes the para/sympathetic nervous system.
Control glands and heart contractions.
Makes involuntary changes depending on which environment you’re in.
Heart pathophysiology:
Arteries carry blood AWAY from heart. Veins carry blood TO the heart.
Capillaries permit the exchange of nutrients, dissolved gases and waste b/w the
blood and the surrounding tissues.
Right atrium RECEIVES blood from SYSTEMATIC circuit into Right ventricle, which
pumps blood into pulmonary circuit.
Left atrium COLLECTS blood from PULMONARY circuit and empties into left ventricle,
pumping blood into systematic circuit.
AV valves are folds of tissue that extend into the openings b/w the atria and the
ventricles, permitting blood flow in only one direction.
Right atrium:
Receives blood from the superior vena cava and inferior vena cava.
Superior vena cava will deliver blood from head, neck, upper limbs and chest.
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Explain the role of the autonomic nervous system. Define the terms parasympathetic, sympathetic, muscarinic, nicotinic, agonist and antagonist. Identify the major classes of cardiac agents affecting conduction and contractility and examples of medications found in each: beta blockers, antiarrhythmic, calcium channel blockers, electrolytes. Briefly describe the actions of each major class (one to two sentences) Identify significant adverse drug reactions (adrs) for each drug class. Explain relevant nursing actions to manage risk when administering these medications. Synthesise knowledge to inform clinical decision making for patient assessment, education and evaluation. Pump refers to heart"s ability to contract. Cannot bind to cell receptor (lock and key) and therefore no action will occur to the cell. Binds and stimulates the cell receptor, thus producing cellular response. Branch of peripheral nervous system that regulates functioning of organs and includes the para/sympathetic nervous system. Makes involuntary changes depending on which environment you"re in.
