Lidocaine - 13342-2

Question 0

Lidocaine - Actions (3)

Answer 0

• decreases automaticity of Purkinje PM cells by reducing slope of P4 Diastolic depolarization
• decreases potential for reentrant pathways
• increases the fibrilatory threshold of myocardial cells in setting of AMI

Question 1

Lidocaine - Class (1)

Answer 1

• Antidysrhythmic

Question 2

Lidocaine - Indications (3)

Answer 2

• symptomatic PVC’s
• VT/VF after defib/epi
• Wide complex tach (WCT) of unknown origin

Question 3

Lidocaine - Contraindication (4)

Answer 3

• Hypersensitivity
• Conduction disorders (2/3 degree heart block)
• Stokes-Adams/WPW
• Ventricular escape rhythms

Question 4

Lidocaine - Side Effects (2)

Answer 4

• Early Toxicity w/ S/S (Tinnitus, Twitching, slurred speech, confusion)
• Late Toxicity S/S (Hypotension/Heart block)
• 2 mins to hit central circulation

Question 5

Lidocaine - Precautions (2)

Answer 5

• dose reduced in low CO states for >70 y/o, hepatic dysfunction (not for initial dose in CPA)
• give via AC with arm elevated and a 20/30 cc fluid bolus