They are the result of vibrations caused by abnormal blood flow patterns. A murmur does not necessarily indicate a disease or disorder, and all heart disorders do not cause murmurs. The grading is on a scale with grade I being barely detectable. Also used to describe a murmur is the stage of the heartbeat when the murmur is heard. The location where the health care provider hears the murmur loudest is also often noted.
Emotional stress can sometimes cause a temporary change in the heart sounds.
This list is not all inclusive, and the causes are not presented in order of likelihood. The causes of this symptom can include unlikely diseases and medications. Furthermore, the causes may vary based on age and gender of the affected person, as well as on the specific characteristics of the symptom such as location, quality, time course, aggravating factors, relieving factors, and associated complaints. Use the Symptom Analysis option to explore the possible explanations for abnormal heart sounds, occurring alone or in combination with other problems. The information provided herein should not be used for diagnosis or treatment of any medical condition.