NCIt definition : An innocent murmur with a medium pitched, harsh character heard at the right or left
upper sternal border, supraclavicular region, or anterior portion of the lower neck
that disappears with bilateral shoulder hyperextension. (ACC/AHA);
Alternative definition : ACC/AHA: An innocent murmur with a medium pitched, harsh character heard at the right
or left upper sternal border, supraclavicular region, or anterior portion of the lower
neck that disappears with bilateral shoulder hyperextension.;