Applied Evidence

Strategies for caring for the well cancer survivor

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References

There are few studies of pharmacotherapy of anxiety or depression in cancer survivors56; it is known that cancer survivors are nearly twice as likely as the general population to be taking medical therapy for anxiety and depression.58 A Cochrane systematic review of 7 small studies showed uncertain improvement in depressive symptoms in patients with cancer from antidepressant medication; however, an earlier systematic review did show benefit.59,60

Second malignancies are dangerous; 55% of patients die of the second cancer, compared to only 13% of their initial cancer.

In a trial of patients without depression who were being treated for head and neck cancer, escitalopram, 20 mg/d, reduced the risk of subsequent depression compared with placebo.61 A study of 420 breast cancer survivors showed that 300 mg/d and 900 mg/d dosages of gabapentin were both superior to placebo, and nearly equivalent to each other, at reducing anxiety scores.62 In both studies, however, the evidence is nonetheless insufficient to make specific recommendations about these medications.

Cardiac risk. The risk of cardiovascular morbidity in cancer survivors is, in fact, higher than the risk of recurrence of cancer.63 Cancer survivors have 5 times the risk of heart failure and 10 times the risk of coronary artery disease and cerebrovascular disease than patients without cancer.63 Most of this risk is incurred because of the physiologic effects of chemotherapy and radiation.

Among chemotherapeutic agents, anthracyclines, such as doxorubicin, cause the most rapid and striking myocyte damage. This damage is dose-dependent and nearly irreversible, with 98% of injury occurring within the first year of chemotherapy.64 More than one half of cancer patients taking an anthracycline have cardiac dysfunction on imaging; 5% will be in overt heart failure 10 to 20 years, or longer, after chemotherapy.63 Following monitoring at 1 year post-therapy, regular cardiac imaging is not recommended in the absence of symptoms.62

Because other cardiotoxic chemotherapeutic agents cause partially reversible damage, imaging is not recommended in the absence of symptoms in patients taking those agents.64

Continue to: Radiation therapy to the chest leads...

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