Assertion: heart murmur's cause | /r/HasProperty | narrowed blood vessels
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Source sentences:
text: Other causes for heart murmurs include narrowed blood vessels (subarotic stenosis, SAS), abnormal valves (leaky mitral valves), abnormal muscle contractility of the heart, holes in the wall between chambers (atrial septal defect, ASD) and abnormal blood flow between the chambers of the heart.