Patent ductus arteriosus symptoms

Patent ductus arteriosus often is small distributaries, no symptoms. Because aortic pressure is higher than pulmonary arterial pressure, so in the whole cardiac cycle continued left to right shunt, pulmonary blood flow increased, pulmonary artery and its branches expanded, returning to the left atrium and left ventricle is also a corresponding increase in blood flow, left atrial , Room diastolic load increased, the expansion of the ascending aorta. sub-flow depends on the size of patent ductus arteriosus and main cavity thickness - between pulmonary artery pressure gradient. a large number of left to right shunt, pulmonary hypertension can lead to advanced, if obstructive pulmonary hypertension, pulmonary arterial pressure close to or above the aortic pressure, then shunt reduction or cessation of the right-to-left shunt, and a right ventricular hypertrophy, cyanosis and clubbed fingers (toes). because of the level in the descending aorta shunt left subclavian artery of the distal, in order to lower extremities for cyanosis Obviously, left-to-right shunt at the level of aorta, aortic diastolic blood pressure decreased, increased pulse pressure, such as emergence of a series of peripheral vascular signs.

Patent ductus arteriosus signs: apex beat enhanced and to the left shift, cardiac dullness expand to the lower left. Sternal intercostal Ⅱ left edge of the first lateral side there is a continuous loud noise. Conduction to the left on the back neck. With systolic or continuous fine tremor. there pulmonary hypertension, the systolic murmur may be heard only. hyperthyroidism and pulmonary split second sound, pulmonary valve can be closed relative insufficiency of the diastolic murmur. sub-flow is larger, as a result of the blood through the mitral increased flow. growth, there is a short apical mid-diastolic murmur. may have peripheral vascular signs, including: enhanced carotid pulse, pulse pressure increased, water veins, capillary pulsation.