To Reassure and Educate Pregnant Patients About Changes in Their

To reassure and educate pregnant patients about changes in their cardiovascular system,maternity nurses should be aware that:

A) a pregnant woman experiencing disturbed cardiac rhythm, such as sinus arrhythmia requires close medical and obstetric observation, no matter how healthy she otherwise may appear.
B) changes in heart size and position and increases in blood volume create auditory changes from 20 weeks to term.
C) palpitations are twice as likely to occur in twin gestations.
D) all of the above changes will likely occur.