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Cardiac reserve in ...
Cardiac reserve in the transplanted heart: effect of a graft polymorphism in the beta1-adrenoceptor
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- Scharin Täng, Margareta, 1962 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Wallenberglaboratoriet,Institute of Medicine, Department of Molecular and Clinical Medicine,Wallenberg Laboratory
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- Lindberg, Erika, 1979 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Institutionen för biomedicin, avdelningen för klinisk kemi och transfusionsmedicin,Wallenberglaboratoriet,Institute of Medicine, Department of Molecular and Clinical Medicine,Institute of Biomedicine, Department of Clinical Chemistry and Transfusion Medicine,Wallenberg Laboratory
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- Grüner Sveälv, Bente, 1956 (författare)
- Gothenburg University,Göteborgs universitet,Wallenberglaboratoriet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Wallenberg Laboratory,Institute of Medicine, Department of Molecular and Clinical Medicine
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- Magnusson, Yvonne, 1957 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för biomedicin, avdelningen för klinisk kemi och transfusionsmedicin,Wallenberglaboratoriet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Institute of Biomedicine, Department of Clinical Chemistry and Transfusion Medicine,Wallenberg Laboratory,Institute of Medicine, Department of Molecular and Clinical Medicine
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- Andersson, Bert, 1952 (författare)
- Gothenburg University,Göteborgs universitet,Wallenberglaboratoriet,Institutionen för medicin, avdelningen för molekylär och klinisk medicin,Wallenberg Laboratory,Institute of Medicine, Department of Molecular and Clinical Medicine
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(creator_code:org_t)
- Elsevier BV, 2007
- 2007
- Engelska.
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Ingår i: The Journal of Heart and Lung Transplantation. - : Elsevier BV. - 1053-2498. ; 26:9, s. 915-20
- Relaterad länk:
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- BACKGROUND: Polymorphism of the beta1-adrenoceptor (beta1-AR) affects outcome and beta-blocker efficacy in patients with heart failure. We studied the influence of the beta1-AR Ser49Gly polymorphism on cardiac reserve in transplanted hearts. METHODS: Beta1-AR polymorphism was determined by allelic discrimination analysis. Patients were divided into two groups: either homozygous for Ser49 (n = 15) or with Gly49 in one or both alleles (Gly49; n = 5). Patients underwent a maximal bicycle exercise test and echocardiographic evaluation at rest and during low-dose dobutamine stress. RESULTS: Patients with Gly49 grafts had better physical endurance (144 +/- 26 vs 112 +/- 31 W, p = 0.03), a trend toward better chronotropic reserve (deltaHR 64 +/- 13 vs 47 +/- 16 bpm, p = 0.056) during exercise, and lower resting heart rate (82 +/- 7 vs 90 +/- 7 bpm, p = 0.04) than those homozygous for Ser49. There were no significant differences in left ventricular ejection fraction (LVEF), with the exception of a decrease in cardiac reserve in patients with the Gly49 variants at the lowest dose of dobutamine (deltaLVEF -4.4 +/- 1.5 vs 2.2 +/- 5.8%, p = 0.04). Doppler myocardial tissue velocities of early relaxation were increased in patients with the Gly49 variants compared with patients homozygous for Ser49, both at rest (14.5 +/- 3.2 vs 10.4 +/- 2.0 cm/s, p = 0.03) and during the lowest dose of dobutamine (15.0 +/- 3.7 vs 10.9 +/- 2.5 cm/s, p = 0.04). CONCLUSIONS: Heart transplant patients with the beta1-AR Gly49 variants had a lower heart rate, and better stress endurance and diastolic function compared with patients homozygous for Ser49. They also showed a trend toward better chronotropic reserve. These results provide a possible explanation for differences in cardiac reserve among patients with heart transplants.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Fysiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Physiology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Cell- och molekylärbiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Cell and Molecular Biology (hsv//eng)
Nyckelord
- Heart transplantation
- beta-1-adrenoceptor
- echocardiography
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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