Table 1: Changing cardiovascular risk profile of the renal transplant recipient.

 

2001

2005

2010

2012

Age (S.D.)

39.2 (3.1)

41.7 (3.2)

48.7 (3.3)

50.8 (3.3)

Co-morbidties

CAD

PVD

Diabetes mellitus

Stroke

 

5.8% (n = 5)

10.4% (n = 9)

9.3% (n = 9)

0% (n = 0)

 

12.8% (n = 10)*

14.1% (n = 11)

19.2% (n = 15)**

1.3% (n = 1)

 

31.2% (n = 25)**

18.7% (n = 15)*

27.5% (n = 22)**

7.5% (n = 6)**

 

34.4% (n = 42)**

21.3% (n = 26)*

27.9% (n = 34)**

9.8% (n = 12)**

BMI (kg/m2)

< 30

30-35

> 35

 

100% (n = 86)

 

94.9% (n = 74)

5.1% (n = 4)

 

72.5% (n = 58)**

26.25% (n = 21)

1.25% (n = 1)

 

64.8% (n = 79)**

27.0% (n = 33)

8.2% (n = 10)

Smoker (%)

40.7% (n = 35)

32.1% (n = 25)*

25.0% (n = 20)**

24.5% (n = 30)

Abnormal Resting ECG

5.8% (n = 5)

12.8% (n = 10)*

26.2% (n = 21)**

25.4% (n = 31)**

Exercise tolerance test

Failed to complete 10 mins Bruce protocol/achieve target heart rate

ECG changes consistent with ischaemia

 

5.6% (n = 1)

 

5.6% (n = 1)

 

12.0% (n = 3)

 

16.0% (n = 4)*

 

45.5% (n = 25)**

 

27.3% (n = 15)**

 

40.3% (n = 25)**

 

33.9% (n = 21)**

Echocardiography

LV ejection fraction < 50%

Left ventricular hypertrophy

Valvular heart disease

 

0% (n = 0)

33.3% (n = 4)

0% (n = 0)

 

0% (n = 0)

23.8% (n = 12)

0% (n = 0)

 

2.2% (n = 1)

55.6% (n = 25)*

0% (n = 0)

 

5.8% (n = 3)**

42.3% (n = 22)*

0% (n = 0)

NHYA functional status

1

2

3

4

 

60.5% (n = 52)

39.5% (n = 34)

 

52.5% (n = 41)

41.0% (n = 32)

6.4% (n = 5)

 

26.2% (n = 21)**

60.0% (n = 48)

13.8% (n = 11)

 

25.4% (n = 31)**

53.8% (n = 65)

21.3% (n = 26)

ASA

3

4

 

100% (n = 86)

 

100% (n = 78)

 

100% (n = 80)

 

97.5% (n = 120)

2.5% (n = 2)

 

Results are displayed as the percentage of the total transplant population/ year with each risk factor (or percentage of patients who had imaging with a positive result in cases when the whole population were not imaged). Coronary artery disease (CAD) was defined as previous myocardial infarction or symptomatic coronary artery disease with angiographic changes of stenosis > 50% in any vessel. Peripheral vascular disease (PVD) was defined as intermittent claudication with claudication disease < 50 metres, critical ischaemia or previous major lower limb amputation. Hypertension was defined as a systolic blood pressure repeatedly > 140/90. Diabetes was defined as two fasting blood sugars > 7 mmol/l. Hyperlipidaemia was defined as a fasting cholesterol > 5 mmol/l. Significant valvular heart disease was defined as a gradient across the aortic valve > 30 mmHg or > 5 mmHg across the mitral valve. Left ventricular hypertrophy on echo was defined as a left ventricular mass index > 150 g/m2. ASA is the American Society of Anaesthetics classification of peri-operative risk. All results were compared to 2001 as the baseline. *indicates a statistically significant difference from baseline (p < 0.05) and **indicates a highly statistically significant difference (p < 0.001) (Reproduced from Aitken, et al., 2013).