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14 Cards in this Set
- Front
- Back
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When is a permanent pacemaker indicated?
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Asymp. =
2nd Degree Mobitz II AV Block(block below the AV node 3rd Degree AV block with wide QRS(suggests block is below the AV node) Symptomatic = Any bradycardia--sinus bradycardia, 2nd degree AV block of any type, and 3rd degree AV block of any type |
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Should bradycardias always get a pacemaker?
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No--they don't all need them, but even some asymptomatic ones require
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What are the two scenarios that require an ICD?
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2ndary prophylaxis--patients who have already had an episode of symptomatic ventricular arrhythmia
Primary prophylaxis--patients at high risk for SCD but haven't had an arrhythmia |
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What kinds of patients need Secondary prophylaxis?
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Those who have been resuscitated from cardiac arrest due to VF or VT or those that have had symptomatic VT with underlying heart disease
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What kinds of patients need Primary prophylaxis?
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Those who have a LV EF less than 35% and those who have other syndromes that put them at high risk
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Who are NOT candidates for ICD's?
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Severe psychiatric disorder patients or those with a terminal illness OR those with VT/VF that can be reversed
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What are the requirements for CRT devices?
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NYHA Class III or IV despite therapy
LVEF < 35% QRS duration > 120 ms usually with a LBBB |
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True/False: Pacemakers can correct tachycardia
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FALSE--only bradycardia
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True/False: CRT is used for pacing of bradycardia.
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False--it is for synchronization of the contraction of the ventricles
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Ephedrine
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Mixed acting
Indirect and direct partial agonist activity against A1,2/B1,2 ASE: Hypertension, insomnia, and tachyphylaxis |
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What does the Gq messenger do?
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Increase messenger IP3 and DAG
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What does beta receptor coupled to Gs stimulation ultimately do?
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Activates ATP to cAMP(its 2ndary messenger) that activates calcium channels and induces calcium release
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What happens when you add Ach after a Beta stimulator?
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It suppresses the activity of the beta stimulator through its Gi action
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What are some metabolic effects of the sympathetic nervous system?
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Skeletal muscle--beta receptor increases blood lactic acid and stimulates Na/K ATPase which causes K uptake into cells
Hepatic alpha receptors release potassium from the liver |
