Abstract:
OBJECTIVES:The purpose of this study was to validate a digital color Doppler (DCD) automated cardiac flow measurement method for quantifying pulmonary regurgitation (PR) in an in vitro and a chronic animal model of the right ventricular outflow tract of postoperative tetralogy of Fallot (TOF). BACKGROUND:There has been no reliable ultrasound method that can accurately quantitate PR. METHODS:We developed an in vitro model of mild pulmonary stenosis and wide-open PR that mimics the patterns of flow seen in patients with postoperative TOF. Thirteen different forward and regurgitant stroke volumes (RSVs) across the noncircular shaped cross-sectional outflow tract flow area were estimated using the DCD method in two orthogonal planes. In six sheep with surgically created PR, 24 different hemodynamic states with PR strictly quantified by electromagnetic probes were also studied. RESULTS:The RSVs and regurgitant fractions (RFs) obtained by the DCD method using average values from two orthogonal planes correlated well with reference values (RSV: r = 0.99, mean difference = 0.02 +/- 0.39 ml/beat for in vitro model; r = 0.97, mean differences = 1.79 +/- 1.84 ml/beat for animal model, RF: r = 0.98, mean difference = -1.10 +/- 4.34% for in vitro model; r = 0.94, mean difference = 2.73 +/- 6.75% for animal model). However, the DCD method using a single plane had limited accuracy for estimating pulmonary RFs and RSVs. CONCLUSIONS:The DCD method using average values from two orthogonal planes provides accurate estimation of RSVs and RFs and should have clinical importance for serially quantifying PR in patients with postoperative TOF.
journal_name
J Am Coll Cardioljournal_title
Journal of the American College of Cardiologyauthors
Mori Y,Irvine T,Jones M,Rusk RA,Pham Q,Kenny A,Sahn DJdoi
10.1016/s0735-1097(00)01106-2subject
Has Abstractpub_date
2001-02-01 00:00:00pages
632-40issue
2eissn
0735-1097issn
1558-3597pii
S0735-1097(00)01106-2journal_volume
37pub_type
杂志文章abstract:OBJECTIVES:Because the renin-angiotensin-aldosterone system (RAS) modifies cardiovascular autonomic regulation, we studied the possible associations between baroreflex sensitivity (BRS) and polymorphism in the RAS genes. BACKGROUND:Wide intersubject variability in BRS is not well explained by cardiovascular risk facto...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(99)00506-9
更新日期:2000-01-01 00:00:00
abstract:OBJECTIVES:We sought to evaluate whether fasting hyperhomocystinemia reduces endothelial function by oxidative stress in normotensive subjects and hypertensive patients. BACKGROUND:Subjects with hyperhomocystinemia have endothelial dysfunction. METHODS:In 23 normotensive subjects and 28 hypertensive patients, classif...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(01)01492-9
更新日期:2001-10-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(93)90369-c
更新日期:1993-06-01 00:00:00
abstract::Right ventricular end-diastolic and stroke volumes were calculated from orthogonal subcostal echocardiographic images in 24 neonates (mean weight +/- SD 3.4 +/- 0.4 kg) with pulmonary atresia (n = 18) or critical pulmonary stenosis (n = 6) and intact ventricular septum before and at an average of 5 days and then 19 da...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(92)90289-y
更新日期:1992-04-01 00:00:00
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doi:10.1016/0735-1097(94)90179-1
更新日期:1994-12-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/j.jacc.2004.10.053
更新日期:2005-02-15 00:00:00
abstract:BACKGROUND:The prevalence of obstructive coronary artery disease (CAD) in symptomatic patients referred for diagnostic testing has declined, warranting optimization of individualized diagnostic strategies. OBJECTIVES:This study sought to present a simple, clinically applicable tool enabling estimation of the likelihoo...
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(87)80467-9
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pub_type: 临床试验,杂志文章
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更新日期:2012-06-19 00:00:00
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更新日期:2011-02-08 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 临床试验,杂志文章
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更新日期:1991-01-01 00:00:00
abstract::Products of ischemic metabolism can make a major contribution to electrical instability of the heart. In particular, enhanced extracellular potassium slows conduction, thereby predisposing to reentrant circuits, especially when levels of cyclic adenosine monophosphate (AMP) increase in the early ischemic period. Other...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/s0735-1097(85)80549-0
更新日期:1985-06-01 00:00:00
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更新日期:2010-05-25 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,评审
doi:10.1016/j.jacc.2009.04.102
更新日期:2009-11-17 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/0735-1097(93)90843-p
更新日期:1993-07-01 00:00:00
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pub_type: 杂志文章,meta分析
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更新日期:2003-01-01 00:00:00
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journal_title:Journal of the American College of Cardiology
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:2014-01-28 00:00:00
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pub_type: 杂志文章,meta分析
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更新日期:2018-06-05 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:2001-12-01 00:00:00
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更新日期:2007-05-15 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
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更新日期:2017-04-11 00:00:00
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更新日期:2011-03-08 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2005.05.066
更新日期:2005-09-06 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章,多中心研究,随机对照试验
doi:10.1016/j.jacc.2007.01.092
更新日期:2007-06-12 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(86)80392-8
更新日期:1986-11-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 指南,杂志文章
doi:10.1016/0735-1097(91)90556-o
更新日期:1991-11-01 00:00:00
abstract::To determine the incidence of cardioversion-induced ventricular arrhythmias in patients with therapeutic serum levels of digoxin, 19 patients (average age [+/- standard deviation] 61 +/- 12 years) undergoing elective direct current cardioversion for atrial fibrillation were studied. Only patients with therapeutic seru...
journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(85)80427-7
更新日期:1985-04-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/s0735-1097(96)00485-8
更新日期:1997-02-01 00:00:00
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journal_title:Journal of the American College of Cardiology
pub_type: 杂志文章
doi:10.1016/j.jacc.2006.09.054
更新日期:2007-03-13 00:00:00