PRESYSTOLIC MURMUR Meaning and
Definition
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A presystolic murmur is an abnormal heart sound that occurs during the phase of the cardiac cycle just prior to the contraction of the heart's ventricles, known as systole. The term "presystolic" refers to the specific timing of the murmur within the cardiac cycle.
This type of heart murmur is typically heard using a stethoscope during a physical examination. It is characterized by a low-pitched, rumbling sound that occurs between the first and second heart sounds, which are normally heard as "lub-dub." The presystolic murmur has a distinct quality that sets it apart from other types of heart sounds.
Presystolic murmurs are often associated with certain cardiac conditions, specifically those affecting the valves of the heart. One common cause is mitral stenosis, where the mitral valve becomes narrowed, restricting blood flow from the left atrium to the left ventricle. This obstruction can create turbulent blood flow, resulting in the presystolic murmur.
Understanding and diagnosing the underlying cause of a presystolic murmur is crucial for appropriate management and treatment. The specific characteristics of the murmur, such as its intensity, duration, and location, provide important clues for determining the underlying pathology. Additional diagnostic tests, such as echocardiography, may be required to further evaluate the condition and guide treatment decisions.
In summary, a presystolic murmur is an abnormal heart sound that occurs just prior to ventricular contraction. It is typically associated with certain cardiac conditions, particularly those affecting the heart valves. Diagnosis and management of the underlying cause of the murmur are essential for appropriate patient care.
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One heard in the interval between the pulmonary diastole and systole, due to obstruction at one of the atrioventricular orifices.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for PRESYSTOLIC MURMUR
- oresystolic murmur
- lresystolic murmur
- -resystolic murmur
- 0resystolic murmur
- peesystolic murmur
- pdesystolic murmur
- pfesystolic murmur
- ptesystolic murmur
- p5esystolic murmur
- p4esystolic murmur
- prwsystolic murmur
- prssystolic murmur
- prdsystolic murmur
- prrsystolic murmur
- pr4systolic murmur
- pr3systolic murmur
- preaystolic murmur
- prezystolic murmur
- prexystolic murmur
- predystolic murmur
Etymology of PRESYSTOLIC MURMUR
The word "presystolic" is derived from the prefix "pre-", meaning "before", and the adjective "systolic", referring to the phase of the cardiac cycle when the heart contracts and pumps blood. It originates from the Latin word "praesystolicus", which combines "prae" (before) and "systolicus" (systolic).
The term "murmur" comes from the Middle English word "murmure", which is borrowed from the Latin word "murmurare", meaning "to murmur or make a low sound". This term was used to describe abnormal sounds heard during auscultation, especially when evaluating cardiac conditions.
Therefore, the etymology of "presystolic murmur" relates to a specific abnormal sound heard during auscultation that occurs before the systolic phase of the heart's contraction.
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