TODAYS PICK (28-07-2010)

prepare2pg

Question history: PGI

Torsade-pointes is caused by
a)hypermagnesemia
b)hypomagnesemia
c)hyperkalemia
d)hypokalemia

Ans:b,d

Discussion:Reference Harrisons textbook of Internal Medicine

Torsa-de-pointes
            Torsa-de-pointes is a specific type of ventricular tachycardia.
     Characteristics of Torsa-de-pointes:
  • Polymorphic QRS complexes that change in amplitude
  • Cycle length giving the appearance of Oscillations around the base line
  • Marked QT prolongation


      Conditions predisposing to Torsa-de-pointes :
  • Congenital long QT syndrome.
  • Aquired long QT syndrome
  • Electrolyte disturbances(hypomagnesemia&hypokalemia)
  • Ventricular hypertrophy
  • Female gender
  • Bradycardia




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