To appropriately monitor therapy and client progress, the nurse should be aware that increased myocardial work and O2 demand will occur with which of the following?
To appropriately monitor therapy and client progress, the nurse should be aware that increased myocardial work and O2 demand will occur with which of the following?
Positive inotropic therapy will increase the force of the heart's contraction. This enhanced contractility leads to increased myocardial work and consequently, an increase in oxygen demand. Therefore, increased myocardial work and O2 demand occur with positive inotropic therapy. Negative chronotropic therapy and afterload reduction therapy would reduce the workload of the heart and, hence, decrease oxygen demand. An increase in the balance of myocardial O2 supply and demand indicates a stable condition, not one that increases O2 demand.
Answer : A