Heart murmur. Definition

Medical Definition: heart murmur

Blow occurred in the cardiac structures. Series of auditory vibrations longer a heart tone, produced by the effect of the flow of blood flow through cardiac structures, and is characterized by its intensity, frequency, quality, configuration, duration, location and radiation, and occurs in the cardiac cycle. Its main classification is based on this last feature, so that systolic murmurs may be, they start with or after the first heart sound, diastolic, or if they do it after the second heart sound, or continuous, when they occupy, without interruption the whole cardiac cycle. Within each of these phases, murmurs may occur before, during or after the systole and diastole, or be holosystolic or holodiastólicos, if they occupy the full phase. As for intensity, heart murmurs usually graduate on an increasing scale, four or six degrees, also classified as growing murmurs, when its intensity increases continuously, decreasing with decreasing, constant, when its intensity is constant, and spindle or diamond, when its intensity increases initially and decreases at the end. The sound quality is very variable, depending on her, she speaks of blows rough, smooth, in caw of seagulls, chirping, musical, etc. In general, heart murmurs are due to the formation of turbulence in the abrupt changes in vascular caliber secondary to the presence of cardiac disorders (murmurs secondary to organic or heart disease), although in some cases, are heard in healthy hearts with no evidence of cardiac involvement (functional or innocent murmurs.)

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