NCIt definition : An innocent murmur with a medium pitched, vibratory character heard at the apex, left
lower sternal border, left middle sternal border, and right upper sternal border that
disappears or becomes quieter and localizes to the left lower sternal border on upright
position. (ACC/AHA);
Alternative definition : ACC/AHA: An innocent murmur with a medium pitched, vibratory character heard at the
apex, left lower sternal border, left middle sternal border, and right upper sternal
border that disappears or becomes quieter and localizes to the left lower sternal
border on upright position.;