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sessions teach importance of a healthy heart
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Faced with the potential problem of patients surviving renal transplants only to succumb to ischaemic heart disease, renal dietitan Elaine Stewart and her colleagues at the Royal Sussex County Hospital in Brighton have begun Health Heart Sessions designed to help patients reduce their risks of cardiovascular disease.
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Why is CVD risk greater?

Previous history of CRF
High prevalence of hyperlipidaemia High proportion of diabetics
Hyperhomocysteinaemia Healthy Heart Sessions
Medication Diet
Exercise    

Renal transplant patients are at significantly greater risk of cardiovascular disease (CVD) than are members of the general population.

The incidence of ischaemic heart disease events has been found to be as high as 23% by 15 years post transplantation (1). Another study found that the incidence of CVD was about five times greater than that predicted by the Framingham Heart Study data for patients of comparable age and gender (2).

So, as graft-survival time increases, renal healthcare professionals are becoming increasingly concerned that many of these patients are surviving their renal disease only to develop cardiovascular disease.

On a positive note, professionals have also identified several modifiable risk factors, which can by targeted for intervention.

Why is CVD risk greater?

Many of the risk factors for heart disease identified in renal transplant patients are the same as in the general population but there are additional risk factors specific to chronic renal failure (3).

Some of the main risk factors identified are:

  a previous history of chronic renal failure (CRF);
  high prevalence of hyperlipidaemia;
  high proportion of diabetics; and
  hyperhomocysteinaemia.

Previous history of CRF

Patients on dialysis are at even greater risk of CVD than are transplant patients. CVD mortality is approximately 15-times higher in dialysis patients than in the general population (4). Ideally, suitable patients should be transplanted as soon as possible. All chronic renal failure patients need to be targeted to reduce CVD risk.

High prevalence of hyperlipidaemia

It is generally accepted that total and LDL cholesterol increases the risk of CVD in the general population. The clinical evidence for an association in renal transplant patients is not conclusive but the observational studies undertaken have shown a strong link (5).

High proportion of diabetics

The incidence of post-transplant diabetes has been estimated at 3.6 to 18% (5). Immunosuppressive medication and weight gain post transplant have both been identified as risk factors for diabetes. The increased risk of CVD in diabetics is widely recognised.

Hyperhomocysteinaemia

It has been estimated that renal transplant patients have homocysteine levels twice as high than in the general population when matched for age and gender (5). It is proposed that increased homocysteine increases the risk of CVD (5,6). Many studies have shown that treatment with folic acid in combination with vitamin B6 and B12 can decrease homocysteine levels (6,7).


Healthy Heart Sessions at Brighton

The aim of the Healthy Heart Session is to give patients information about their risk of cardiovascular disease and on how they can reduce this risk through lifestyle changes. The Sessions are multidisciplinary and are designed to be informative and enjoyable.

The multidisciplinary team includes the consultant nephrologist, the renal transplant sister, the dietitian, the pharmacist and the physiotherapist.

During the Session, patients are taught what heart disease is, why transplant patients are at greater risk, and how they can reduce their risk factors. Other topics discussed include medication, diet and exercise.

 

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References:
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1)

Kasiske BL et al. (1996) Cardiovascular disease after renal transplantation. Journal of American Society of Nephrology 7 158-165.

2) Kasiske BL (1988) Risk factors for accelerated atherosclerosis in renal transplant recipients. American Journal of Medicine 84 985-992.
3) Levey AS et al. (1998) Controlling the epidemic of cadiovascular disease: What we know? What do we need to learn? Where do we go from here? American Journal of Kidney Disease 32 853-906.
4) Sarnak MJ and Levey AS (2000) Cardiovascular Disease and Chronic Renal Disease: A new Paradigm. American Journal of Kidney Diseases 35:4.
5) Kasiske LB et al. (2000) Recommendations for the outpatient surveillance of renal Transplant Recipients. Journal of the American Society of Nephrology 11: Suppl 15.
6) Shemin D, Bostom A G, Selhub J (2001) Treatment of hyperhomocysteinaemia in end stage renal disease. American Journal of Kidney Diseases. 38:4.
7) Hooper L (2002) Dietetic guidelines: Secondary prevention of cardiovascular disease. Journal of Human Nutrition and Dietetics. 14 297-305.