Narrow, complex supraventricular tachycardia refractory to vagal maneuvers.
Lidocaine (Xylocaine) Indications
Pulseless Ventricular Tachycardia
Ventricular Tachycardia (w/pulse)
Diltiazem (Cardizem) Indications
- Atrial Fibrillation
- Atrial Flutter
- PVST refractory to Adenosine
To increase artery perfusion in angina.
Amiodarone (Cordarone & Pacerone) Indications
Life-threatening recurrent ventricular & supraventricular dysrhythmias that have not responded to other antidysrhythmic agents.
Hemodynamically Significant Bradycardia
Blocks the parasympathetic nervous system, specifically the vagal effects on the heart rate.
It does NOT increase contractility but may increase myocardial oxygen demand.
Decreases Airway Secretions
Amiodarone (Cordarone & Pacerone) Description
Is an antidysrhythmic that prolongs the duration of the action potential & refractory period and relaxes smooth muscles, reducing peripheral vascular resistance and increasing coronary blood flow.
Diltiazem (Cardizem) Description
Is a SLOW calcium channel blocker, similar to Verapamil.
It dilates coronary and peripheral arteries and arterioles thus increasing circulation to the heart and reducing peripheral vascular resistance.
Lidocaine (Xylocaine) Description
Is an antidysrhythmic that suppresses automaticity and raises stimulation threshold of the ventricles.
It also causes sedation, anticonvulsant, and analgesic effects.
Adenosine (Adenocard) Description
A naturally occuring agent that can "chemically cardiovert" PSVT to a normal sinus rhythm.
It has a half-life of 10 seconds and does NOT cause hypotension.
Epinephrine (Adrenalin) Description
Is a naturally occuring catecholamine that increases heart rate, cardiac contractile force myocardial electrical activity, systemic vascular resistance, and systolic BP and decreases overall airway resistance and automaticity.
It also, through bronchial artery constriction may reduce pulmonary congestion and increase tidal volume and vital capacity.