systolic murmur vs heart murmur

systolic murmur and heart murmur both are nouns.

Word	Noun	Adjective	Verb	Adverb
systolic murmur	Yes	No	No	No
heart murmur	Yes	No	No	No

As nouns, heart murmur is a hypernym of systolic murmur; that is, heart murmur is a word with a broader meaning than systolic murmur:

systolic murmur: a murmur heard during systole
heart murmur: an abnormal sound of the heart; sometimes a sign of abnormal function of the heart valves

Other hypernyms of systolic murmur include cardiac murmur, murmur.

systolic murmur (noun)	heart murmur (noun)
a murmur heard during systole	an abnormal sound of the heart; sometimes a sign of abnormal function of the heart valves