Abstract:
:Left ventricular flow patterns were studied at rest by colour flow Doppler echocardiography in 33 patients with mitral tilting-disc prostheses (group 1), in 38 patients with mitral tissue prostheses (group 2) and in 18 healthy volunteers (controls). A 'crossed' flow pattern was seen in 14 patients with mechanical (42%) and in 15 patients with tissue prostheses (39%). The remaining patients and all controls had either 'parallel' or 'intermediate' flow patterns which were classified as 'normal'. There was a significant correlation between the type of flow pattern and the position of the mitral prosthesis in both study groups. The presence of a crossed flow pattern, however, was not related to functional status (assessed clinically by NYHA class) or to abnormalities on the electrocardiogram. Left atrial size was greater in patients with crossed flow than in those without, but all other echocardiographic parameters were similar. Eight patients with crossed and eight with normal flow patterns underwent treadmill exercise testing; there was no difference between the two groups with regard to exercise performance as determined by exercise duration, maximum oxygen consumption and the ventilatory response to exercise. The results of this study indicate that the pattern of blood flow within the left ventricle may be fundamentally altered by the orientation of both mechanical and tissue prostheses. The presence of a crossed flow pattern is not, however, accompanied by significant deleterious haemodynamic or functional consequences.
journal_name
Eur Heart Jjournal_title
European heart journalauthors
Maire R,Ikram S,Odemuyiwa O,Groves PH,Lo SV,Banning AP,Hall RJdoi
10.1093/oxfordjournals.eurheartj.a060494subject
Has Abstractpub_date
1994-03-01 00:00:00pages
293-302issue
3eissn
0195-668Xissn
1522-9645journal_volume
15pub_type
杂志文章abstract:AIMS:Adults who engage in leisure-time physical activity (LTPA) have a reduced risk of developing heart failure. We hypothesized that high levels of LTPA are associated with diminished adverse age-related changes in cardiac structure and function. METHODS AND RESULTS:We studied 4342 Atherosclerosis Risk in Communities...
journal_title:European heart journal
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abstract:AIMS:Reperfusion injury following acute myocardial infarction impacts not only on the myocardium but also on the coronary microcirculation, and microembolization from the culprit lesion contributes to microvascular obstruction. Prior experimental studies have not accounted for microembolization in ischaemia/reperfusion...
journal_title:European heart journal
pub_type: 杂志文章
doi:10.1093/eurheartj/ehs434
更新日期:2013-11-01 00:00:00
abstract::Subclinical thyroid dysfunction comprises subclinical hypothyroidism (SHypo), defined as elevated thyroid-stimulating hormone (TSH) by normal free thyroxine (FT4), and subclinical hyperthyroidism (SHyper) with decreased or undetectable TSH and normal FT4. Up to 10% of the elderly have SHypo, which is usually asymptoma...
journal_title:European heart journal
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doi:10.1093/eurheartj/ehx050
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journal_title:European heart journal
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doi:10.1093/eurheartj/ehaa598
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abstract::In a 58-year-old man with vasospastic angina, we investigated the relationship between the antianginal effects of isosorbide dinitrate (ISDN) and plasma ISDN concentration. Despite adequate plasma ISDN levels, sustained therapy using ISDN tapes and oral ISDN (transcutaneously 160 mg and orally 100 mg ISDN day-1) faile...
journal_title:European heart journal
pub_type: 杂志文章
doi:10.1093/oxfordjournals.eurheartj.a060270
更新日期:1992-06-01 00:00:00
abstract::To compare the blood pressure (BP) changes during a long-distance run with those during bicycle ergometry, nine normotensive and 18 hypertensive joggers were studied by means of ambulatory intra-arterial monitoring. In all subjects the ergometric test caused a progressive increase in systolic and little change in dias...
journal_title:European heart journal
pub_type: 杂志文章
doi:10.1093/oxfordjournals.eurheartj.a059709
更新日期:1990-04-01 00:00:00
abstract::The haemodynamic side-effects of ionic (amidotrizoate) and non-ionic (iopamidol) contrast media after injection into the right atrium were compared in experimental and clinical studies. Pulmonary hypertension was induced in 10 dogs by embolization of the pulmonary vascular bed with agar-agar solution (mean pulmonary a...
journal_title:European 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:1987-12-01 00:00:00
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journal_title:European heart journal
pub_type: 杂志文章
doi:10.1093/eurheartj/ehaa037
更新日期:2020-03-21 00:00:00
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journal_title:European heart journal
pub_type: 杂志文章
doi:10.1093/oxfordjournals.eurheartj.a059557
更新日期:1989-08-01 00:00:00
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journal_title:European heart journal
pub_type: 杂志文章
doi:10.1053/euhj.1997.0730
更新日期:1998-01-01 00:00:00
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pub_type: 新闻
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更新日期:2015-05-14 00:00:00
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更新日期:1984-10-01 00:00:00
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journal_title:European 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:2017-03-07 00:00:00
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journal_title:European 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:2011-09-01 00:00:00
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journal_title:European heart journal
pub_type: 杂志文章
doi:10.1053/euhj.1999.1867
更新日期:2000-05-01 00:00:00
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pub_type: 杂志文章,评审
doi:10.1093/oxfordjournals.eurheartj.a060232
更新日期:1992-05-01 00:00:00
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journal_title:European heart journal
pub_type: 杂志文章
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更新日期:2010-11-01 00:00:00
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journal_title:European heart journal
pub_type: 杂志文章
doi:10.1093/oxfordjournals.eurheartj.a060259
更新日期:1992-06-01 00:00:00
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doi:10.1093/eurheartj/ehm567
更新日期:2008-01-01 00:00:00
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journal_title:European heart journal
pub_type: 杂志文章
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更新日期:1992-12-01 00:00:00
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pub_type: 杂志文章
doi:10.1093/eurheartj/16.suppl_o.46
更新日期:1995-12-01 00:00:00
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更新日期:2006-10-01 00:00:00
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pub_type: 杂志文章,随机对照试验
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更新日期:2016-12-21 00:00:00
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journal_title:European heart journal
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验
doi:10.1053/euhj.1999.1477
更新日期:1999-08-01 00:00:00
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journal_title:European heart journal
pub_type: 杂志文章
doi:10.1093/oxfordjournals.eurheartj.a061656
更新日期:1984-04-01 00:00:00
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journal_title:European heart journal
pub_type: 杂志文章
doi:10.1093/eurheartj/16.1.43
更新日期:1995-01-01 00:00:00
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journal_title:European heart journal
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doi:10.1093/eurheartj/ehu236
更新日期:2015-05-01 00:00:00
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journal_title:European heart journal
pub_type: 杂志文章
doi:10.1093/oxfordjournals.eurheartj.a061894
更新日期:1985-06-01 00:00:00
abstract:AIMS:To assess compliance to guidelines in the management of patients with atrial fibrillation. METHODS AND RESULTS:A total of 728 questionnaires were mailed to physicians with the intention of studying 'theoretical' compliance to practice guidelines. A retrospective evaluation of 200 records from consecutive patients...
journal_title:European heart journal
pub_type: 杂志文章
doi:10.1053/euhj.2000.2300
更新日期:2001-10-01 00:00:00
abstract::The magnitude and biological relevance in vivo of the beta-blocking properties, observed in vitro, of propafenone remains controversial. We studied the effects of propafenone on the heart rate response to graded stimulation of the right stellate ganglion in 13 anaesthetized, vagotomized cats. The decentralized ganglio...
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pub_type: 杂志文章
doi:10.1093/eurheartj/14.9.1253
更新日期:1993-09-01 00:00:00