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Published on: May 7, 2015
Is there disparity between risk and incidence of cardiovascular disease after liver transplant?
David A J Neal1, Brian D M Tom, Jian'an Luan
1Department of Medicine, University of Cambridge, School of Clinical Medicine, Addenbrooke's Hospital, Cambridge, UK.
Insights
Liver transplant recipients face increased risks for cardiovascular disease due to hypertension and hypercholesterolemia. Despite higher predicted coronary heart disease risk, no deaths from heart attack or stroke occurred in the study.
Area of Science:
- Cardiology
- Hepatology
- Transplantation Medicine
Background:
- Hypertension and hypercholesterolemia are known complications post-liver transplantation.
- The impact of these complications on cardiovascular disease (CVD) development remains unclear.
Purpose of the Study:
- To determine the prevalence of coronary heart disease (CHD) risk factors after liver transplantation.
- To assess the effect of liver transplantation on predicted 10-year CHD risk and cardiovascular event incidence compared to a matched population.
Main Methods:
- Retrospective analysis of 181 adult liver transplant recipients.
- Data collected included blood pressure, lipids, weight, diabetes, smoking, myocardial infarction (MI), and stroke.
- Framingham coronary risk equations were used to calculate 10-year CHD risk.
Main Results:
- Prevalence of hypertension was 77%; hypercholesterolemia was 62%.
- Predicted 10-year CHD risk increased from 6.9% pre-transplant to 11.5% post-transplant, versus 7% in controls.
- Incidence ratios for MI and stroke were 0.55 and 1.45, respectively, compared to non-transplant controls.
Conclusions:
- Liver transplant recipients exhibit a high prevalence of CVD risk factors and elevated predicted CHD risk.
- Despite increased risk factors, no deaths from CHD or stroke were observed during the follow-up period.
Background:
Hypertension and hypercholesterolemia are recognized complications of liver transplantation, but whether they contribute to the development of cardiovascular disease is uncertain. We aimed first to determine the prevalence of risk factors for coronary heart disease (CHD) after liver transplantation and second to study the effect of liver transplantation on the predicted 10-year risk of developing CHD and the incidence of cardiovascular events in comparison with a matched local population.
Methods:
Data on blood pressure, serum lipids, weight, diabetes mellitus, smoking, and incidence of myocardial infarction (MI) and stroke were obtained retrospectively from the case notes of 181 consecutive adult liver transplant recipients (median follow-up 54 months). The Framingham coronary risk equations were used to calculate the 10-year probability of developing CHD.
Results:
The prevalences of hypertension and hypercholesterolemia after transplantation were 77% and 62%, respectively. The predicted 10-year risk of CHD increased from 6.9% before transplantation to 11.5% at 1 year after transplantation, whereas that of a matched local population was 7%. Compared with a matched nontransplant population, the incidence ratios for MI and stroke were 0.55 (95% confidence interval, 0.01-3.06 ) and 1.45 (95% confidence interval, 0.18-5.22), respectively. No patients died from MI or stroke.
Conclusions:
Liver transplant recipients have a high prevalence of risk factors for cardiovascular disease, exceeding that of the general population, and have a higher predicted risk of developing CHD. Despite this, there were no deaths from CHD or stroke during the study period.
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