Even watching a tank full of tropical fish may lower blood pressure, at least temporarily. A study of 92 patients hospitalized in coronary care units for angina or heart attack found that those who owned pets were more likely to be alive a year later than those who did not. The study found that only 6 percent of patients who owned pets died within one year compared with 28 percent of those who did not own pets. The therapeutic use of pets as companions has gained increasing attention in recent years for a wide variety of patients -people with AIDS or cancer, the elderly, and the mentally ill. Unlike people, with whom our interactions may be quite complex and unpredictable, animals provide a constant source of comfort and focus for attention.
Animals bring out our nurturing instinct.
They also make us feel safe and unconditionally accepted. We can just be ourselves around our pets. In a study people undergoing oral surgery spent a few minutes watching tropical fish in an aquarium. The relaxation level was measured by their blood pressure, muscle tension, and behavior. It was found that the subjects who watched the fish was much more relaxed than those who did not watch the fish prior to the surgery.