Abstract:
:Polymorphic ventricular arrhythmias (PVAs) initiated by programmed electrical stimulation may be a nonspecific response or evidence of ventricular electrical instability. To determine if PVAs initiated in patients with spontaneous sustained ventricular tachycardia or fibrillation differ from those which are clearly a nonspecific response in structurally normal hearts, the initiation, characteristics, and relationship to ventricular repolarization of PVAs greater than five beats in duration were evaluated in 32 patients without structural heart disease and in 36 patients with spontaneous sustained ventricular arrhythmias more than 9 days after myocardial infarction. Patients received one to four extrastimuli during sinus rhythm and right ventricular pacing. In a comparison with patients who completed the same steps (defined by the basic drive cycle length and number of extrastimuli) in the stimulation protocol, there was no difference in the cumulative risk of initiation of a PVA between the patients with and those without heart disease at any step. This risk was 51% vs 38% for patients who received two or fewer extrastimuli at four basic cycle lengths (p = NS). PVAs were initiated by the same mean number of extrastimuli (2.3 +/- 0.5 vs 2.6 +/- 0.9 p NS) with the same degree of prematurity in both groups. Forty-four percent of the PVAs in the myocardial infarction group had a cycle length greater than 250 msec or a coupling interval of the first tachycardia beat to its initiating stimulus greater than 320 msec as opposed to only one (6%) in the group without heart disease (p less than 0.02).(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Am Heart Jjournal_title
American heart journalauthors
Stevenson WG,Brugada P,Waldecker B,Zehender M,Wellens HJdoi
10.1016/0002-8703(86)90008-6subject
Has Abstractpub_date
1986-06-01 00:00:00pages
1073-80issue
6eissn
0002-8703issn
1097-6744pii
0002-8703(86)90008-6journal_volume
111pub_type
杂志文章abstract::A significant diuretic and natriuretic response occurs during paroxysmal supraventricular tachycardia (SVT). Although the diuresis may be secondary to suppression of vasopressin secretion, the etiology of the natriuresis remains unexplained. To determine if atrial natriuretic factor (ANF) could contribute to the polyu...
journal_title:American heart journal
pub_type: 杂志文章
doi:10.1016/0002-8703(86)90301-7
更新日期:1986-11-01 00:00:00
abstract::Magnetic resonance imaging (MRI) produces high-resolution images of great-vessel anatomy in pediatric patients. In this study seven patients, aged 6 to 27 months were evaluated by using gated MRI and two-dimensional echocardiography 4 to 26 months after arterial switch operation for D-transposition of the great arteri...
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pub_type: 评论
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更新日期:2004-04-01 00:00:00
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更新日期:2002-08-01 00:00:00
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更新日期:2017-04-01 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:2017-03-01 00:00:00
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更新日期:2003-10-01 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:2008-01-01 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:2004-02-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:1991-10-01 00:00:00
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更新日期:2008-05-01 00:00:00
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pub_type: 临床试验,杂志文章,多中心研究
doi:10.1016/s0002-8703(98)70341-2
更新日期:1998-01-01 00:00:00
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doi:10.1067/mhj.2000.107173
更新日期:2000-08-01 00:00:00
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pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2001-11-01 00:00:00
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pub_type: 杂志文章
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更新日期:1988-01-01 00:00:00
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更新日期:1986-07-01 00:00:00
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pub_type: 杂志文章
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更新日期:1992-08-01 00:00:00
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更新日期:1991-06-01 00:00:00
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journal_title:American heart journal
pub_type: 临床试验,杂志文章,多中心研究,随机对照试验,评审
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更新日期:1996-03-01 00:00:00
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pub_type: 杂志文章
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更新日期:1988-05-01 00:00:00
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pub_type: 临床试验,杂志文章,meta分析
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更新日期:2003-04-01 00:00:00
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pub_type: 杂志文章
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更新日期:1992-03-01 00:00:00