Notice: Users may be experiencing issues with displaying some pages on stanfordhealthcare.org. We are working closely with our technical teams to resolve the issue as quickly as possible. Thank you for your patience.
All heart murmurs are analyzed for pitch, loudness, and duration. They are also graded, according to their intensity (on a scale of one to six with one being very faint and six being very loud).
Types of murmurs include:
Systolic murmur - occurs during a heart muscle contraction. Systolic murmurs are divided into ejection murmurs (due to blood flow through a narrowed vessel or irregular valve) and regurgitant murmurs.
Diastolic murmur - occurs during heart muscle relaxation between beats. Diastolic murmurs are due to a narrowing (stenosis) of the mitral or tricuspid valves, or regurgitation of the aortic or pulmonary valves.
Continuous murmur - occurs throughout the cardiac cycle.