<prompt> Answer this question truthfullyWhat are the epidemiological and demographic characteristics of heart murmurs?  <response>: <reason> The prevalence of heart murmur among neonates varies among different studies, ranging from as low as 0.9 to 77.4. According to one study involving 7204 neonates, a murmur was detected in less than 1 of the neonates. Half of the neonates with heart murmur had cardiovascular malformation. The prevalence of heart murmur is 13.7 per 1000 neonate. there is a 42.5 chance that the murmur is due to underlying structural defects. 