The risk of kidney disease patients developing kidney failure or dying is higher if they are hospitalized for heart failure, underlining the need for coordinated care between heart and kidney specialists and primary care physicians, suggests a new study that has been published in the Journal of the American Society of Nephrology.
Both CKD and congestive heart failure are becoming increasingly prevalent as the general population ages and contributing conditions such as diabetes, hypertension, and vascular disease become more widespread. Patients with the combination of CKD and heart failure pose management challenges for both heart and kidney specialists. For example, it can be difficult to find the right balance of diuretic therapy to reduce the frequency of hospitalizations for heart failure without further worsening a patient's kidney function.
AdvertisementTo look at the relationship of heart failure and CKD, Maneesh Sud, MD, David M.J. Naimark, MD, MSc (University of Toronto) and their colleagues examined how multiple heart failure hospitalizations affect CKD patients' risk of developing kidney failure or dying prematurely. The researchers retrospectively studied 2887 CKD patients referred between 2001 and 2008 to a nephrology clinic in Toronto.
The team found that the risks of both outcomes—kidney failure and premature death—increased markedly in a step-wise fashion after each successive heart failure hospitalization. Compared with no heart failure hospitalizations, one, two, or three or more heart failure hospitalizations increased the risk of developing kidney failure by 5-, 10-, and 14-fold, respectively. They increased the risk of dying before developing kidney failure by 3-, 4-, and 7-fold, respectively.
"The clinical implications of the work are that heart failure hospitalization is frequent in CKD patients, that the presence and number of prior hospitalizations affect both mortality and kidney failure risk, and that the existence of multiple prior hospitalizations may have a bearing on decisions regarding dialysis or kidney transplantation," said Dr. Naimark. "Whether enhanced secondary prevention strategies among CKD patients who have experienced multiple heart failure hospitalizations would mitigate these risks is an important question for future research," he added.
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