The axes of leads I, II, and III form an equilateral triangle ...

[melina_rosy]

The axes of leads I, II, and III form an equilateral triangle with the heart at the center (Einthoven's triangle).
 
  If the augmented limb leads are added to this configuration and the axes of the six leads moved in a way in which they bisect each other, the result is the _____ _____ _____.
 
  Fill in the blanks with correct word

Question 2

Complete the following ECG criteria for Wolff-Parkinson-White (WPW) syndrome:
 
  Rhythm ___________________ _______
  Rate ___________________ _______
  P waves ___________________ _______
  PR interval ___________________ _______
  QRS duration ___________________ _______
 
  Fill in the blanks with correct word

[isabelt_18]

Answer to Question 1

hexaxial reference system

Answer to Question 2

Rhythm Regular, unless associated with atrial fibrillation.
Rate Usually 60 to 100 beats/min, if the underlying rhythm is sinus in origin.
P waves Normal and positive in lead II unless WPW is associated with atrial fibrillation.
PR interval If P waves are observed, less than 0.12 seconds.
QRS duration Usually greater than 0.12 seconds; slurred upstroke of the QRS complex (delta wave) possibly seen in one or more leads.

[melina_rosy]

TYSM

[alvinum]

Excellent