Systolic murmur

Systolic noise is the noise, listen to the period of contraction of the ventricles between the first and second heart tones.
Hemodynamic changes in the cardiovascular system is called the transformation of layered blood flow in the vortex that causes vibration of the surrounding tissue that is held to the surface of the chest and is perceived as sound effects in the form of systolic noise.
Crucial for the emergence of vertical motions and the emergence of systolic murmur is the presence of obstacles or narrowing current of blood, and the power of systolic murmur is not always proportional to the degree of narrowing. The decrease of blood viscosity, such as anemia, creates conditions that facilitate the occurrence of systolic noise.
Systolic noise divided into inorganic, or functional, organic, due to the morphological changes of the heart and valve system.
To functional systolic noise are: 1) systolic murmur relative mitral insufficiency, listen above the apex of the heart; 2) systolic murmur over the aorta during its expansion; 3) systolic murmur at insufficiency of the aortic valve; 4) systolic murmur of the pulmonary artery with its expansion; 5) systolic noise arising from nervous excitement or significant physical stress, velosipedist based (and sometimes over the top) of the heart along with tachycardia and enhanced acoustics tones;
6) systolic murmur at fever sometimes found on the aorta and pulmonary artery; 7) systolic murmur in severe anemia and thyrotoxicosis, listening over the entire area of the heart.
Systolic murmur expansion aortic or pulmonary artery is associated with a relative narrowing of the mouths of these vessels and most audible in the very beginning of the beats that distinguishes it from systolic noise in organic stenosis. Systolic murmur at insufficiency of the aortic valve depends on the increase of stroke volume of the left ventricle and ejection rate of blood through a relatively narrow mouth of the aorta.
In addition to functional systolic noise is the so-called physiological systolic murmur, often listen to young healthy people on the ground, and sometimes at the apex of the heart. Physiological systolic murmur of the pulmonary artery may listens in healthy people aged 17-18 in 30% of cases, mainly in people asthenic physique. This noise is heard only in a limited area, varies depending on the position of the body, breath and pressure stethoscope, has a quiet blowing nature, found more frequently in the beginning of systole.
Organic systolic noise when valvular divided into noises exile (stenosis of the aortic or pulmonary artery) and noise regurgitation (failure two - or tricuspid valve).
Systolic murmur stenosis aortic tough and strong, heard and right in the second intercostal space in the sternum and extends up to the right clavicle and arteries of the neck; in place of live and on carotid arteries is palpated systolic shake; noise occurs after the first tone, noise intensity is increased by the middle of the beats. In case of a sharp stenosis maximum noise happens in the second half of systole due to delayed expulsion of blood. Systolic murmur when extending sklerozirovanie aortic not be so rude, no systolic shake, maximum noise is defined at the beginning of the beats, and the second tone is a resonant or reinforced. In elderly people with atherosclerosis, except systolic noise over the aorta may listens systolic murmur over the apex of the heart - the so-called atomically systolic murmur.
When narrowing the mouth of the pulmonary artery systolic noise heard in the second intercostal space on the left; noise rough, strong, is distributed to the left collarbone, accompanied systolic a quiver in place auscultation; the second tone is doubled with the location of pulmonary component before aortic. When sclerosis and expansion of the pulmonary artery maximum systolic noise heard at the beginning of systole, the second tone is usually significantly strengthened. Sometimes the pulmonary artery listening systolic noise when cleft septal the enlargement of the initial part of the pulmonary artery; the second tone is usually split.
When cleft interventricular septum due to the passage of blood through the small defect from the left to the right ventricle appears rough and loud systolic murmur in the third and fourth intercostal space on the left of the sternum, sometimes with distinct systolic trembling.
Systolic noise when the mitral valve insufficiency is best heard over the top, spreading to the armpit; noise blowing starting directly after the first tone and weakening towards the end of systole.
Systolic murmur in case of insufficiency of tricuspid valve shall be heard in the lower part of the sternum; often it's very quiet and difficult to distinguish it from coexisting with him systolic noise mitral origin.
Systolic murmur at coarctation of the aorta is listening on the basis of the heart, aorta and the pulmonary artery, but often it louder on the back in the area of the left ADAPTACII fossa, spreading along the spine; noise begins after a certain period of time after the first tone and may end after the second tone. In an open arterial (botallowa) duct noise is in the nature of systolicdiastolic due to the current of blood from the aorta to the pulmonary artery during both cardiac cycles; noise it is best heard of the pulmonary artery or below the left collarbone.
Upon detection of the standing systolic noise patient should be referred to a physician for a thorough research of the cardiovascular system.
Cm. also, the Heart, the heart diseases.