Can anxiety cause a heart murmur?

Yes: A heart murmur is not synonymous with a heart problem, in fact most murmurs are normal. Murmur is a term used to describe certain types of "squirting" sounds heard over the heart with a stethoscope. Anxiety makes our hearts beat faster and harder making the blood move faster which in turn makes its exit from the heart noisier. Check with your doctor to make sure your heart is normal.

Dr Landron-garcia agreed

No: Heart murmurs are caused mostly by diseases of the valves of the heart, but can also be caused by congenital heart disease with septal defects, or abnormal connections between the aorta and pulmonary artery. They can also be totally benign conditions due to vigorous blood flow through the heart, usually in kids and athletes. Those murmurs are known as pulmonary flow murmurs.

Faster blood flow: Anxiety can increase heart rate. That sometimes produces a benign "flow murmur". It's not significant, but new murmurs need to be checked out -- and perhaps even more importantly, anxiety needs to be assessed and effectively managed.