The fourth intercostal space at the left sternal margin is the site for which of the following elec-trocardiogram leads?
a. V1 c. V3
b. V2 d. V4
ANS: B
V2 is placed in the fourth intercostal space, at the right sterna margin.
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What is the correct procedure for calculating a regular heart rate interrupted by premature beats?
A) Calculate the range slowest to fastest using the memory method and the mean rate using the six-second strip method. B) Ignore the premature beats and calculate the heart rate using the little block or memory method. C) Calculate the range fastest to slowest using the little block method and the mean rate using the six-second strip method. D) Ignore the premature beats and calculate the heart rate using the six-second strip or memory methods.
Measles is no longer considered endemic in many parts of the world.
Answer the following statement true (T) or false (F)