Century In spite of the fact that

Century In spite of the fact that at a pulmonary hypertensia pressure in a pulmonary trunk can be less intraaortal, loudness of a pulmonary component is peer or exceeds loudness of an aortal component. It is caused by following reasons: 1. An extensibility and the area of a surface of the valve of a pulmonary artery above, than at the aortal valve. 2. The valve of a pulmonary artery is located more close to a forward thoracal wall, than the aortal valve. 3. At a massive embolism of pulmonary arteries afterload rising leads to depression of buy voltaren emission of blood from a right ventricle which can be accompanied by reduction of loudness of a pulmonary component. 3. Than the raised loudness of an aortal component speaks at diseases with hyperkinetic type of a circulation, such as a thyrotoxicosis and an aortal regurgitation? At these diseases during a systole in an aorta the enlarged volume of blood leading to an appreciable restretching of its walls gets. The last, in turn, promotes intensifying of a return stream of blood, growth of hydrostatic pressure, more vigorous the aortal valve and, accordingly, to augmentation of loudness of an aortal component. Intensity of the last is proportional to energy of a stream of blood while closing of cusps leads to rate depression a blood flow through the aortal valve. Notes: And. At a serious aortal regurgitation the aortal component of the second warm tone can be silent, presumably that owing to defect of a tissue the area of valves becomes insufficient for retardation a blood stream. Besides, peripheric vascular resistance at the expressed aortal regurgitation can be so low, that force of an elastic stretching of walls of an aorta dissipates in peripheric vessels. . Results of one research in which course the endocardiac catheter equipped with a microphone was established in a lumen of the aortal valve, testify that at an aortal regurgitation of any degree loudness of an aortal component is less, than in norm. These data contradict the clinical experience based on auscultation of heart by means of a stethoscope, and should be regarded as the technical artefact caused by a locating of a catheter with a microphone above the incompetent aortal valve. 4.
How loudness of both components of the second warm tone at inspiration height changes? Loudness of a pulmonary component on an inspiration is usually enlarged, that is bound to entering of the enlarged volume of blood in a pulmonary artery, a restretching of its walls and intensifying of a return blood flow. On the contrary, the aortal component becomes more silent, since during an inspiration from a left ventricle the smaller quantity of blood is expelled and the distance between an aorta and a forward thoracal wall to which the stethoscope is enclosed is enlarged. The note: On an inspiration lungs are enlarged in volume and fill space between a stethoscope and heart. In this connection all warm tones auscultated in the top departments of a thorax, during an inspiration become a little bit more silent. The reasons of the lowered loudness of aortal or pulmonary components of the second warm tone 1. What etodolac 400 mg besides respiratory movements, deformations of a thorax and a thickening of its wall can lead to depression of loudness of aortal or pulmonary components of the second warm tone? And. The diseases proceeding with depression of systolic pressure. As an example it is possible to result accompanied by low pressure in a pulmonary trunk a serious stenosis of a pulmonary artery, especially at its combination to blood dump from right to left through defect of an interatrial or interventricular septum . Conditions at which force of an elastic stretching of proximal departments of an aorta and a pulmonary trunk decreases, including: 1. Depression of contractility of a myocardium. 2. An idiopathic dilatation of a pulmonary trunk, and also a dilatation of an aorta or the pulmonary artery, interfaced to damage of an elastic tissue to proximal departments main vascular Century the Extensibility an aorta segment to the greatest degree decreases at ischemic illness of heart. The possible reason of it is the blood vessels feeding a wall of the ascending aorta (vasa vasorum), from coronary arteries. The century of the Condition accompanied by augmentation of a rigidity of semilunar valves (for example, a calcareous infiltration, a sclerosis or an adnation of the cusps, observed, in particular, at an aortal stenosis and a stenosis of the valve of a pulmonary artery). Notes: And. the valve of a pulmonary artery , becomes more rigid and, at a view from a pulmonary trunk, reminds a uterus neck. Frequently its basis grows together with an underlaying wall of a pulmonary artery. That inactive cusps of the valve of a pulmonary artery were closed, pressure in a right ventricle should become much more low, than in a pulmonary trunk.