Source:http://linkedlifedata.com/resource/umls/id/C1160592
GO: Any process that modulates the frequency, rate or extent of heart contraction. Heart contraction is the process in which the heart decreases in volume in a characteristic way to propel blood through the body. [GOC:dph, GOC:go_curators, GOC:tb],GO: Any process that modulates the frequency or rate of heart contraction. [GOC:dph, GOC:tb, PMID:10358008]