心脏听诊全攻略(国外英文资料).docVIP

心脏听诊全攻略 The heart is listening in all the ways Normal heart sounds: It is composed of the first and second heart sounds, and the first one appears in the systole of the heart, which is a sign of ventricular contraction. The formation of the first sound is mainly the closure of the mitral valve and the mitral valve, which is louder in the apex of the heart and lighter in the bottom of the heart. Second diastolic heart sounds appear in the heart, is a sign of ventricular diastolic began, is mainly due to the blood flow within the aorta and pulmonary artery vibration caused by sudden deceleration and semilunar valve closed. The bottom of the heart is louder, the heart is lighter. Heart sounds 1 First note enhancement: There are four factors that affect the first tone of the heart. The rate of increase of ventricular pressure in the systolic period; The filling of the ventricular diastolic period; The position of the chamber flap in the ventricular contractions. One mind hyperthyroidism in mitral stenosis, as a result of the blood flow through the narrow mitral valve into the left room blocked, diastolic left ventricular filling is less, before the ventricular systolic mitral valve is still in its largest state of open, free of mitral valve leaf edge away from the valve mouth, ventricular contraction free mobile distance produces the larger vibration, so the apex of the first heart sound hyperfunction. Cardiophony 2 is the first cardiac hypertone of the mitral stenosis and the opening of a flap, the cardiophonic 3 is the first cardiac hypertone of the complete atrioventricular block. The first heart tone decreases: Common and mitral insufficiency, with mitral regurgitation, left atrial blood flow, flow into the left ventricular volume is big, left ventricular diastolic overfilling, mitral valve free edge before the contract is close to the atrioventricular mouth, leaf fibrosis and calcification or shut down is not complete, small vibration in mitral valve closed, apex