Cardiac Markers QuizOnline version crad mak q by kenneth thomas 1 The most useful enyme to detect for diagnosis of MI is: Written answer 2 CPK-MB is no longer evident upon testing approximately: a 3 days later b 2 days later c 4 days later d a week later 3 troponin remains detectable for _____ days following an acute MI a 14 b 7 c 21 d 5 4 CPK-MB generally appears in just _______hours following an acute MI onset a 3-6 hours b 5-8 hours c 6-8 hours d 2-4 hours 5 SGOT peaks in approximately ____hours following the cardiac event a 24 b 36 c 48 d 12 6 SGOT/AST enzymes are undetectable in blood approximately_____ after the event. a 3 days b 4-6 days c 14 days d 24 hours