Abstract:
:Effects of the administration of a thromboxane A2 (TXA2) analogue (STA2), a leukotriene C4 (LTC4), and a leukotriene D4 (LTD4) on regional myocardial blood flow (RMBF) and hemodynamics were studied in anesthetized, open-chest dogs. The blocking ability of a recently synthesized TXA2 selective antagonist, ONO-3708, and a peptidoleukotriene-selective antagonist, ONO-1078, was also investigated. RMBF was measured continuously in three areas: the left anterior descending coronary artery (LAD) area, the circumflex artery (Cx) area, and the area between LAD and Cx. STA2, LTC4, and LTD4 caused a significant dose-dependent reduction of the RMBF in the LAD area. The peak percentage decrease in RMBF followed by a 10 micrograms dose of STA2, 1 micrograms dose of LTC4, and 1 micrograms dose of LTD4 is 38.6% +/- 3.0%, 39.0% +/- 3.1%, and 36.2% +/- 2.4%, respectively. ED50 for the action of LTC4, LTD4, and STA2 on RMBF is 3, 3, and 50 micrograms, respectively. Pretreatment with the newly developed TXA2 antagonist, ONO-3708 (1 micrograms/kg/min for 10 min), completely inhibited the RMBF reduction induced by STA2 (10 micrograms). Pretreatment with the peptidoleukotriene antagonist, ONO-1078 (1 mg), inhibited the RMBF reduction induced by LTC4 or LTD4 (0.3-3 micrograms). Following pretreatment with a 1 mg dose of ONO-1078, the peak percentage decrease of RMBF caused by a 1 micrograms dose of LTC4 and LTD4 was reduced to 21.1% +/- 2.3% and 19.8% +/- 3.1%, respectively. However, the LTC4 (1 micrograms)-induced reduction of the RMBF was not affected by pretreatment with a TXA2 antagonist, ONO-3708, or an inhibitor of the endogenous production of TXA2, OKY-046.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Heart Vesselsjournal_title
Heart and vesselsauthors
Torii T,Toki Y,Hieda N,Ito Y,Okumura K,Hashimoto H,Ito T,Ogawa K,Satake Tdoi
10.1007/BF02058997subject
Has Abstractpub_date
1988-01-01 00:00:00pages
104-11issue
2eissn
0910-8327issn
1615-2573journal_volume
4pub_type
杂志文章abstract::The subendocardial side of myocardium makes a major contribution to left ventricular (LV) contraction and is very susceptible to ischemia. In this study we sought to quantify regional wall motion during low-dose dobutamine stress echocardiography (DSE) by using the myocardial velocity gradient (MVG) derived from tissu...
journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s003800070042
更新日期:2000-01-01 00:00:00
abstract::Myocardial fibrosis and microvascular dysfunction are key determinants of outcome in heart failure (HF); we examined their relationship in patients with HF. Our study included 61 consecutive patients with HF but without coronary stenosis. All underwent gadolinium-enhanced cardiac magnetic resonance to evaluate late ga...
journal_title:Heart and vessels
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abstract::Inflammatory markers are elevated in acute coronary syndromes, and are also known to play a crucial role in the pathogenesis of neointimal proliferation and stent restenosis. Drug-eluting stents (DESs) have been shown to decrease stent restenosis in different studies. In this study, we aimed to investigate the effect ...
journal_title:Heart and vessels
pub_type: 临床试验,杂志文章
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abstract::It is well known that patients with gastroesophageal reflux disease (GERD) experience GERD-related chest pain, but little is known about the relationship between GERD and coronary artery disease (CAD). We evaluated medical history of GERD in patients with suspected CAD and its association with types of CAD. We enrolle...
journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s00380-019-01413-1
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journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s00380-007-0998-5
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journal_title:Heart and vessels
pub_type: 杂志文章
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更新日期:2007-03-01 00:00:00
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journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s00380-006-0971-8
更新日期:2007-09-01 00:00:00
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journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/BF01745169
更新日期:1996-01-01 00:00:00
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journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s00380-018-1271-9
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journal_title:Heart and vessels
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journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s00380-018-1139-z
更新日期:2018-08-01 00:00:00
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journal_title:Heart and vessels
pub_type: 杂志文章
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更新日期:1991-01-01 00:00:00
abstract::Although apical and midventricular Takotsubo cardiomyopathies (TTCs) share common triggers and pathophysiological features, little is known about the potential differences in left ventricular (LV) mechanistic properties between these TTC phenotypes. We sought to investigate whether LV systolic and/or diastolic functio...
journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s00380-019-01510-1
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journal_title:Heart and vessels
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journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s00380-019-01471-5
更新日期:2020-02-01 00:00:00
abstract::Previous studies suggested that sleep-disordered breathing was associated with cardiovascular diseases such as heart failure (HF). Recently, algorithms of cardiac implantable electronic devices (CIEDs) have been developed to detect advanced sleep apnea (SA); the Apnea Scan (AP Scan) being an example. The purpose of th...
journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s00380-019-01551-6
更新日期:2020-06-01 00:00:00
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journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s00380-012-0313-y
更新日期:2013-11-01 00:00:00
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journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s00380-007-1012-y
更新日期:2008-01-01 00:00:00
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journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s00380-016-0824-z
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journal_title:Heart and vessels
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journal_title:Heart and vessels
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journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s00380-020-01716-8
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journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/BF01744386
更新日期:1993-01-01 00:00:00
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journal_title:Heart and vessels
pub_type: 杂志文章
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journal_title:Heart and vessels
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journal_title:Heart and vessels
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journal_title:Heart and vessels
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journal_title:Heart and vessels
pub_type: 杂志文章
doi:10.1007/s003800200028
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