Systolic murmurs are graded on a scale of 1-6 while diastolic murmurs are graded ... The intensity of a murmur is primarily determined by the volume/velocity of blood flowing through a defect ...

Diastolic murmurs are graded on a scale of 1 to ... or grade 6 systolic murmurs are heard even without the stethoscope on the chest and may actually be visible. The intensity of a murmur is ...