Nyasha Kunyiswakunyiswan@dailynews.co.zw AUTHORITIES say poverty is contributing to the high cases of congenital heart defects (CHD) in the country. CHD is a general term for a range of birth defects that affect the normal way the heart works.Speaking to the Daily News yesterday, cardiovascular and thoracic surgeon at Parirenyatwa Hospital, Simukai Machawira, said many of…

