Presystolic murmur
Presystolic Murmur
Presystolic murmur (pronunciation: pre-sis-tol-ik mur-mur) is a type of heart murmur that occurs during the atrial systole phase of the cardiac cycle.
Etymology
The term "presystolic" is derived from the Latin "pre" meaning before, and "systolic" from the Greek "systole" meaning contraction. "Murmur" comes from the Latin "murmurare" meaning to murmur or whisper.
Definition
A presystolic murmur is a sound heard during a stethoscope examination of the heart. It is caused by blood flow disturbances that occur during the atrial systole phase, just before the ventricles contract (systole). This type of murmur is often associated with conditions that cause obstruction or increased flow through the heart valves, such as mitral stenosis or tricuspid stenosis.
Related Terms
- Heart Murmur: An abnormal sound heard during a heartbeat. Murmurs range from very faint to very loud and sometimes sound like a whooshing or swishing noise.
- Atrial Systole: The part of the cardiac cycle when the atria contract and push blood into the ventricles.
- Mitral Stenosis: A narrowing of the mitral valve in the heart, which does not allow blood to flow freely from the left atrium to the left ventricle.
- Tricuspid Stenosis: A narrowing of the tricuspid valve in the heart, which does not allow blood to flow freely from the right atrium to the right ventricle.
External links
- Medical encyclopedia article on Presystolic murmur
- Wikipedia's article - Presystolic murmur
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