The nurse is reviewing the electrocardiogram of a client who has elevated st segments visible in leads ii, iii, and avf. which is the nurse's best action?

Nurse must provide necessary medication such as  

Aspirin, streptokinase, heparin and an ACE inhibitor

Explanation:

When the ST segment is elevated in the inferior leads i.e II, III and aVF, then this condition signifies that the RCA (right coronary artery) is injured or occluded and inferior myocardial tissue faces acute infraction. This can cause several complications and in severe cases can prove to be fatal. It is a sign of heart attack. Thus, the nurse must provide necessary medication such as  

Aspirin, streptokinase, heparin and an ACE inhibitor

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.