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Heart murmurs are unique heart sounds produced when blood flows across a heart valve or blood vessel. [1] This occurs when turbulent blood flow creates a sound loud enough to hear with a stethoscope. [2] The sound differs from normal heart sounds by their characteristics. For example, heart murmurs may have a distinct pitch, duration and timing.
Heart sounds are the noises generated by the beating heart and the resultant flow of blood through it. Specifically, the sounds reflect the turbulence created when the heart valves snap shut. In cardiac auscultation , an examiner may use a stethoscope to listen for these unique and distinct sounds that provide important auditory data regarding ...
Location: The location of the murmur in the heart will be identified, along with determining if the sound spreads to the neck or back. Pitch: The heart murmur may have a high, medium or low pitch.
Many innocent murmurs also arise from this location but S1 and S2 must split normally. Mid-systolic ejection Dilation of aortic root or pulmonary artery Produces an ejection sound, with a short ejection systolic murmur and a relatively wide split S2. There is no hemodynamic abnormality.
William Birnbaum with a Phonocardiogram System for use in Project Gemini, 1965. Awareness of the sounds made by the heart dates to ancient times. The idea of developing an instrument to record it may date back to Robert Hooke (1635–1703), who wrote: "There may also be a possibility of discovering the internal motions and actions of bodies - whether animal, vegetable, or mineral, by the sound ...
Auscultogram from normal and abnormal heart sounds. Heart murmurs are most frequently organized by timing, into systolic heart murmurs and diastolic heart murmurs. However, continuous murmurs can not be directly placed into either category. [1] These murmurs are due to blood flow from a high pressure chamber or vessel to a lower pressure system.
Auscultation is performed for the purposes of examining the circulatory and respiratory systems (heart and breath sounds), as well as the alimentary canal. The term was introduced by René Laennec . The act of listening to body sounds for diagnostic purposes has its origin further back in history, possibly as early as Ancient Egypt.
Heart murmurs are sounds generated by blood flowing through the structures of the heart. The location of the Still's murmur on examination suggests resonation of blood in the left ventricular outflow tract and aorta, and this is supported by studies that have shown that the murmur is more intense over the aortic valve than the pulmonary valve. [4]