A new national study found cases of Angina fell by half between 1998 and 2012 for white people over the age of 40, however rates for African Americans stayed the same.
Researchers say more effort is needed to control high blood pressure, smoking and diabetes among blacks.
In other health news, a new study suggests there may be a link between sleep apnea and hearing loss.
Data from 14,000 people found sleep apnea was associated with a 31% increase in high frequency hearing loss and a 90% increase in low frequency hearing loss, such as speech.
The connection could be due to inflammation in blood vessels,which is common in both conditions.
Experts say this is a preliminary study and does not prove that sleep apnea causes hearing loss.
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