Systolic murmurs are considered abnormal if they are:
a. grade I c. grade III or greater
b. grade II d. grade 0
C
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A Incorrect. A heart murmur of grade III or less is considered an innocent murmur and is not abnormal.
B Incorrect. A heart murmur of grade III or less is considered an innocent murmur and is not abnormal
C Correct. Systolic murmurs are considered abnormal if they are loud and grade III or greater. A grade III is loud but not accompanied by a thrill.
D Incorrect. A systolic murmur is considered abnormal at grade III or greater. Murmurs are graded based on their intensity from grade I to grade VI, with VI being the most severe. There is not a grade 0.
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