University of Miami/Jackson Memorial Medical Center doctors announced today that 14-year-old D'Zhana Simmons survived nearly four months without a heart. The girl had a condition that caused her own heart to deteriorate. In July she underwent a heart transplant, but her body quickly rejected the organ. So doctors kept her alive using a custom-built artificial blood-pumping device until she could undergo another transplant. Previously, adults had been kept alive for as long as nine months withou
