SAN DIEGO--(BUSINESS WIRE)--Critical Diagnostics, a U.S.-based biomarker company focused on cardiovascular diseases, today announced that two major reference laboratories—Mayo Medical Laboratories and Atherotech Diagnostics Lab—will offer the company’s Presage ST2 test. The Presage ST2 Assay was recently cleared by the U.S. Food and Drug Administration for use in assessing the prognosis of patients diagnosed with chronic heart failure.