In the limb leads, the ST segment is normally isoelectric, or ...

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In the limb leads, the ST segment is normally isoelectric, or less than 1 mm above or below the isoelectric line.
 
  Indicate whether the statement is true or false

Question 2

Complete occlusion of the _____ coronary artery, also referred to as the widow maker, usually results in sudden death.
 
  a. right
  b. left main
  c. circumflex
  d. left anterior descending

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Answer to Question 1

T
The normal ST segment begins at the isoelectric line, extends from the end of the S wave, and curves gradually upward to the beginning of the T wave. In the limb leads, the normal ST segment is isoelectric (flat) but may normally be slightly elevated or depressed (usually by less than 1 mm).

Answer to Question 2

B
Complete occlusion of the left main coronary artery, also referred to as the widow maker, usually results in sudden death.

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