Can a patent ductus arteriosus cause heart murmur?

Continuous murmur: A PDA causes a continuous murmur because of constant flow of blood from the systemic arterial circulation to the pulmonary arterial circulation. It is often described as a "machinery-type" sound.

Yes: Many patients with patent ductus arteriosus (pda) will have a murmur, and that murmur is often described as machinery or continuous.

Yes: A PDA can sometimes present with a murmur, but often does not have a murmur present.

Yes: Yes, it usually does cause a murmur unless it is really tiny. If it can be heard, it should probably be closed by catheter-based methods.