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[Hypertension after heart transplantation].
1I. interní-kardioangiologická klinika FN U sv. Anny, Brno.
Vnitrni Lekarstvi
|August 22, 2000
Summary
Hypertension is a common complication after heart transplants, affecting 70-90% of patients on cyclosporine and prednisone. Management involves minimizing immunosuppressants and using calcium antagonists, ACE inhibitors, and diuretics.
Area of Science:
- Cardiology
- Immunology
- Nephrology
Context:
- Heart transplantation is a critical treatment for end-stage heart failure.
- Hypertension is a frequent long-term complication in heart transplant recipients.
- The incidence of hypertension ranges from 70-90% in patients treated with cyclosporine and prednisone.
Purpose:
- To explore the mechanisms of hypertension following heart transplantation.
- To identify contributing factors beyond classical pathways.
- To outline treatment strategies for managing post-transplant hypertension.
Summary:
- Hypertension development involves classical mechanisms (renin-angiotensin system, fluid volume, peripheral resistance) and non-classical factors like cardiac denervation, immunosuppression (cyclosporine, corticoids), and nephropathy.
- Cyclosporine-induced hypertension mechanisms include enhanced endothelin-1 effects, reduced nitric oxide (NO) production, increased calcium levels, and sympathicus activation.
- Absence of nocturnal blood pressure and pulse rate drop is noted.
Impact:
- Highlights the multifactorial etiology of hypertension post-heart transplant.
- Emphasizes the need for careful immunosuppression management, aiming for minimal effective cyclosporine levels and steroid discontinuation.
- Recommends calcium antagonists as first-line treatment due to their graft vasculopathy preventive effects, alongside ACE inhibitors and diuretics.