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Fatty plaque in the arteries that feed the kidneys poses a danger to the heart and brain.

Controlling blood pressure and blood sugar will help both your heart and your kidneys.

On the surface, it's difficult to see how coronary artery disease and kidney damage might be related. But on the cellular level, the two conditions often go hand in hand. A closer look reveals the key. Underlying both conditions are two powerful risk factors: high blood pressure and diabetes, each of which damages the heart and kidneys independently.

If your weather forecaster warns about a heat wave this summer, take it seriously. A study by Harvard researchers found that people with certain conditions were at an increased risk of winding up in the hospital during periods of high heat. Their work was published Dec. 23, 2014, in The Journal of the American Medical Association.

Researchers analyzed hospitalization rates for specific diseases among 23 million Medicare beneficiaries between 1999 and 2010. What sent older adults to the hospital most often during a heat wave? Heatstroke, fluid and electrolyte disorders, kidney failure, urinary tract infections, and sepsis (a dangerous blood infection). For some diseases, the risk of hospitalization was elevated for up to five days after a heat wave day, suggesting that preventing and treating heat-related illnesses is crucial both during and after a heat wave.