Continuous blowing sound - The sound of the blowing and the ductus arteriosus

Description

The sound of mechanical sound persisted throughout the systolic and diastolic periods, is clearly heard in the upper left chest.

Figure. The timing and shape of the ductus bellows

Causes

And the ductus arteriosus.

Mechanism

In order to survive a murmur, a pressure differential is required between the structures during the systolic and diastolic periods.

In a patient with a ductus arteriosus, there is a strong association between the aorta and the pulmonary artery, the blood circulates from the high-pressure area in the aorta and the low-pressure area in the pulmonary artery. , making up the first half of the sound. During diastole, the pressure in the aorta is still higher than the pulmonary artery so the blood continues to circulate through the ductus arteriosus - creating the second half of the murmur.