Abstract:
BACKGROUND:The Gly16 beta(2)-adrenergic receptor (beta(2)AR) polymorphism is a common variant of the beta(2)AR that displays depressed function caused by enhanced receptor downregulation in vitro compared with the Arg16 receptor. METHODS AND RESULTS:We studied 20 healthy, normotensive, nonsmoking white individuals who were homozygous for either the Arg16 (n = 10) or the Gly16 (n = 10) genotype. Plethysmographic lower-limb blood flow, blood pressure, and 2-dimensional echocardiograms were recorded at baseline and after 15-minute incremental infusions of terbutaline (100 to 300 ng/kg per minute). Baseline heart rates, blood pressures, and flows were similar in both groups, but at the maximum dose of terbutaline, limb blood flow was less (P <.05), calculated vascular resistance was greater (P <.05), and systolic and diastolic blood pressures were greater in patients with Gly16 than in those with Arg16 (both P <.05). In contrast, terbutaline-stimulated heart rates were not different. In a separate group of 20 homozygous individuals (12 Arg16, 8 Gly16), there were no differences in 2-dimensional echocardiographically determined ventricular function. CONCLUSIONS:We conclude that the Gly16 beta(2)AR polymorphism imparts attenuated vasodilatory responses to catecholamines in normal human beings and is an important genetic component in the regulation of peripheral blood flow and systemic arterial pressure.
journal_name
Am Heart Jjournal_title
American heart journalauthors
Hoit BD,Suresh DP,Craft L,Walsh RA,Liggett SBdoi
10.1016/s0002-8703(00)90099-1subject
Has Abstractpub_date
2000-03-01 00:00:00pages
537-42issue
3eissn
0002-8703issn
1097-6744pii
S0002-8703(00)90099-1journal_volume
139pub_type
临床试验,杂志文章abstract:BACKGROUND:Moderate alcohol drinking and marine omega-3 fatty acids (omega3) have both been associated with low mortality from coronary heart disease (CHD). However, there is little data evaluating the interactions of wine ethanol drinking with omega3 in CHD patients. METHODS:The relationships between wine drinking an...
journal_title:American heart journal
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.ahj.2007.08.009
更新日期:2008-01-01 00:00:00
abstract:BACKGROUND:Although age is the most important variable associated with death among patients with persistent ST-segment elevation, its impact on outcome among patients without persistent ST-segment elevation remains unknown. Moreover, the impact of age on the efficacy of antiplatelet therapy with eptifibatide is unknown...
journal_title:American heart journal
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2000-05-01 00:00:00
abstract:BACKGROUND:The activated coagulation time (ACT) is a rapid measurement of a patient's level of heparin anticoagulation during cardiac catheterization. Patients receiving warfarin therapy occasionally are seen at the catheterization laboratory for emergent procedures. The effects of warfarin on ACT activity have not bee...
journal_title:American heart journal
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journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/j.ahj.2004.03.013
更新日期:2004-09-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章,随机对照试验
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更新日期:2008-10-01 00:00:00
abstract::The possibility of demonstrating noninvasively with C-11 palmitate and positron emission tomography (PET) changes in myocardial substrate metabolism in normal and diseased human myocardium in response to altered substrate availability in blood and disease-related abnormalities was examined in five normal volunteers an...
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pub_type: 杂志文章
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journal_title:American heart journal
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更新日期:1992-05-01 00:00:00
abstract::To investigate the significance and mechanism of dilatation of the left ventricular cavity on dipyridamole thallium-201 imaging, we performed both dipyridamole thallium-201 imaging and dipyridamole radionuclide angiography on 83 patients with known angiograms. The dipyridamole/delayed ratio of the left ventricular dim...
journal_title:American heart journal
pub_type: 杂志文章
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journal_title:American heart journal
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1997-11-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章
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更新日期:1997-01-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章
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更新日期:1983-10-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(78)90369-1
更新日期:1978-03-01 00:00:00
abstract:OBJECTIVES:We analyzed the antiplatelet effects of different P2Y(12) receptor blockers with VerifyNow P2Y12 assay (VN-P2Y12) and light transmittance aggregometry (LTA). BACKGROUND:The point-of-care VN-P2Y12 has been used to assess the antiplatelet effects in clopidogrel-treated patients but has not been evaluated in d...
journal_title:American heart journal
pub_type: 杂志文章,多中心研究,随机对照试验
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更新日期:2012-07-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.ahj.2006.05.011
更新日期:2006-11-01 00:00:00
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journal_title:American heart journal
pub_type: 临床试验,杂志文章
doi:10.1016/0002-8703(91)90835-6
更新日期:1991-06-01 00:00:00
abstract::A morphologic study of 466 cardiac mural thrombi, 66 examples of nonbacterial thrombotic endocarditis, 25 myxomas, and 12 papillary endocardial lesions was performed. It appeared that three different sequences of organization of endocardial thrombi are possible. (1) Ordinary mural thrombi are converted into a flat, fi...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(75)90003-4
更新日期:1975-01-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/j.ahj.2004.10.044
更新日期:2005-09-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(79)90430-7
更新日期:1979-03-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/j.ahj.2007.07.037
更新日期:2007-12-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章,meta分析,评审
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更新日期:2018-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:1988-02-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章
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更新日期:2005-02-01 00:00:00
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journal_title:American heart journal
pub_type: 信件,meta分析
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更新日期:2020-09-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/s0002-8703(99)70123-7
更新日期:1999-08-01 00:00:00
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journal_title:American heart journal
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:1991-01-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章
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更新日期:1977-04-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章
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更新日期:2006-09-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/j.ahj.2006.04.018
更新日期:2006-07-01 00:00:00
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journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/j.ahj.2012.10.016
更新日期:2013-03-01 00:00:00
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pub_type: 杂志文章
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