μ΄μνλ‘ν λ λ
**μ΄μνλ‘ν λ λ(Isoproterenol)**μ μ£Όλ‘ μμ μκΈ μνμμ μ¬μ©λλ κ°λ ₯ν λΉμ νμ λ² ν-μλλ λ λ¦° μμ©μ μ λλ€. μ£Όμ μμμ νΉμ§μ λ€μκ³Ό κ°μ΅λλ€: * **μ¬μ₯ μ§μ:** μ¬λ°μμ μμΆλ ₯μ μ¦κ°μμΌ μμ λ°©μ€ μ°¨λ¨μ΄λ λλ°© κ²°μ μ μ§μ κ°μ μ€μ¦ μλ§₯μ± λΆμ λ§₯μ μΉλ£νλ λ° μ¬μ©λ©λλ€. * **κΈ°κ΄μ§ νμ₯:** κ³Όκ±°μλ κΈμ± κΈ°κ΄μ§ μμΆμ μ¬μ©λμμΌλ, μ¬μ₯ λΆμμ©μ νΌνκΈ° μν΄ νμ¬λ μ£Όλ‘ λ μ νμ μΈ $\beta_2$ μμ©μ (μ: ν λ₯΄λΆνλ¦° λλ μλΆν λ‘€)λ‘ λ체λμμ΅λλ€. * **μΌν¬/μ¬λΆμ :** 보쑰 μλ²μΌλ‘ κ°νΉ μ¬μ©λμ§λ§, κ°λ ₯ν λΆμ λ§₯ μ λ° κ°λ₯μ±κ³Ό λΉλ§₯μ μΌμΌν€λ κ²½ν₯ λλ¬Έμ μ¬μ©μ΄ μ νμ μ λλ€. **μμ μμ :** κ°λ ₯ν μ¬μ₯ μκ·Ή νΉμ±κ³Ό λ μμ νκ³ νμ νλ μΉλ£λ²(μ: λ°©μ€ μ°¨λ¨μ© μ¬λ°λκΈ°, μ²μμ© μ νμ κΈ°κ΄μ§ νμ₯μ )μ κ°μ©μ±μΌλ‘ μΈν΄ μ΄μνλ‘ν λ λμ νμ¬ λλ¬Όκ² μ¬μ©λ©λλ€. μμ© μκ°μ΄ λ§€μ° μ§§μ μ£Όμ μ μ€λ¨νλ©΄ λΆμμ©μ΄ λΉ λ₯΄κ² μ¬λΌμ§λλ€.
μμ© κΈ°μ : **Isoproterenol** is a synthetic sympathomimetic amine that acts as a potent, non-selective agonist at both **$\beta_1$** and **$\beta_2$ adrenergic receptors**, with virtually no $\alpha$-adrenergic activity. **Mechanism Pathway:** Drug binds to **$\beta_1$ and $\beta_2$ receptors** β activates **Gs-proteins** β stimulates **adenylyl cyclase** β increases intracellular **cyclic-AMP (cAMP)** β activates **Protein Kinase A (PKA)**. * **Cardiac Effects ($\beta_1$):** Increased cAMP leads to increased intracellular calcium influx β **positive inotropy** (increased contractility) and **positive chronotropy** (increased heart rate and pacemaker discharge rate). * **Smooth Muscle Effects ($\beta_2$):** Increased cAMP inhibits myosin light-chain kinase (MLCK) β relaxation of bronchial smooth muscle (**bronchodilation**) and peripheral vasculature (**vasodilation**). * **Immunologic Effects:** Inhibits the antigen-mediated release of histamine and slow-releasing substance of anaphylaxis (SRS-A).
λλ¬Ό μ’ λ³ μ©λ
- Sinoatrial arrest, sinus bradycardia, complete AV block Β· 0.4 mg in 250 mL D5W drip slowly to effect Β· IV Β· to effect
- Short-term bronchodilatation Β· Dilute 0.2 mg in 50 mL of saline and administer 0.4 micrograms/kg as an IV infusion, monitor heart rate continuously and discontinue when heart rate doubles. Β· IV Β· once Β· Effects may only last for an hour Β· ARCI UCGFS Class 2 Drug
- Sinoatrial arrest, sinus bradycardia, complete AV block Β· 0.4 mg in 250 mL D5W drip slowly to effect Β· IV Β· to effect
- Sinoatrial arrest, sinus bradycardia, complete AV block Β· Isuprel Glossets 5-10 mg Β· sublingual or rectal Β· q4-6h
- Sinoatrial arrest, sinus bradycardia, complete AV block Β· 0.04-0.08 micrograms/kg/min Β· IV Β· CRI Β· Infusion
- Sinoatrial arrest, sinus bradycardia, complete AV block Β· 0.1-0.2 mg Β· IM, SC Β· q4h
- Sinoatrial arrest, sinus bradycardia, complete AV block Β· 0.4 mg in 250 mL D5W slowly Β· IV Β· slowly
- Adjunctive treatment for bradycardia associated with calcium channel blocker overdose Β· Mix 0.4 mg in 250 mL of D5W and give via slow IV drip to effect. Β· IV Β· to effect Β· Alternative to atropine
μ©λμ λ©΄ν μμ μ λ¬Έκ°λ₯Ό μν μμ μ°Έκ³ μλ£μ λλ€. νμ μ΅μ λΌλ²¨κ³Ό κ°λ³ νμμ λν΄ νμΈνμμμ€.
ν¬μ¬ κ²½λ‘
κΈκΈ°
- Tachycardias or AV block caused by cardiac glycoside (digoxin) intoxication
- Ventricular arrhythmias that do not require increased inotropic activity
μ΄μλ°μ
- Tachycardia
- Ventricular arrhythmias (highly arrhythmogenic)
- Anxiety and excitability
- Tremors
- Headache
- Weakness
- Vomiting
μ½λ¬Ό μνΈμμ©
- General Anesthetics (cyclopropane, halogenated hydrocarbons) Β· Increased risk of developing arrhythmias. Propranolol may be administered should these occur.
- Beta-Blockers Β· May antagonize isoproterenol's cardiac, bronchodilating, and vasodilating effects. Can be used to treat isoproterenol-induced tachycardia, but use with caution in bronchospastic disease.
- Digoxin (Digitalis glycosides) Β· Increased risk of arrhythmias.
- Oxytocic Agents Β· Hypertension may result if used concurrently.
- Other Sympathomimetic Agents (e.g., phenylpropanolamine) Β· Should not be administered concurrently as increased toxicity may result.
- Theophylline Β· May increase the risk for theophylline toxicity.
λͺ¨λν°λ§
- Cardiac rate and rhythm (ECG continuous monitoring highly recommended)
- Respiratory rate and auscultation (especially during anaphylaxis)
- Blood pressure
- Blood gases (if indicated and possible)
- Urine flow (if possible)
κ³Όμ©λ
High doses may cause an initial **hypertension**, followed by **hypotension**, as well as severe **tachycardias and other arrhythmias**. **Treatment:** * Halt or reduce the drug infusion (effects dissipate rapidly due to short half-life). * Provide supportive care. * If tachycardias persist, a **beta-blocker** could be considered for treatment, provided the patient does not have a bronchospastic disease.
VetSheet μ½λ¬Ό λ νΌλ°μ€λ λ©΄ν μμ μ λ¬Έκ°λ₯Ό μν μμ μμ¬κ²°μ 보쑰 λꡬμ΄λ©°, μ λ¬Έμ νλ¨μ΄λ μ μ‘°μ¬μ μ΅μ λΌλ²¨μ λμ νμ§ μμ΅λλ€.