The present investigation was designed to assess the correlation of at
rial natriuretic peptide (ANP) with the ordinary markers of acute myoc
ardial infarction (AMI). In 15 patients with uncomplicated AMI, no rem
arkable variation in ANP plasma levels was found. On the other hand, s
erum myoglobin and cardiac enzymes behaved as usual. Our results show
that ANP is not correlated with serum myoglobin, creatine-phosphokinas
e and its isoenzyme MB, being completely independent from these marker
s of myocardial injury. These observations suggest that the plasma ANP
variations observed in AMI by other investigators are probably depend
ent on hemodynamic dysfunction.