Search Results
Results 451 - 500 of 814
< 5 6 7 8 9 10 11 12 13 14 15 >
Shapira Y - - 1995
The left ventriculograms of 113 patients, divided into seven groups, were reviewed for the detection of unopacified front (UOF) of blood entering the left ventricle (LV) during diastole. Normal UOF was detected in all the patients without left-sided valvular heart disease (regardless of the existence of coronary artery disease), constrictive ...
Deshpande J - - 1995
The autopsy findings in 20 patients who died following percutaneous balloon mitral valvotomy are reported. The procedure was attempted in 508 patients. In 17 of the 20 patients, balloon mitral valvotomy was attempted as a salvage procedure. Ten patients died in the immediate post valvotomy period (within 24 h), seven ...
Zarauza J - - 1995
Balloon mitral commissurotomy is an alternative to surgical commissurotomy in the treatment of mitral stenosis and different studies have shown its usefulness for restenosis following surgical commissurotomy. We describe our experience in balloon mitral commissurotomy in five patients with previous commissurotomy and annuloplasty. Among 360 balloon commissurotomies performed in our ...
Passafini A - - 1995
OBJECTIVES: The aim of this study was to investigate factors affecting pulmonary venous flow patterns in mitral regurgitation. BACKGROUND: Although pulmonary venous flow velocity patterns have been reported to be helpful in assessing the severity of mitral regurgitation, the influence of regurgitant jet direction, pulmonary venous location and left atrial ...
Bahl V K - - 1995
Mitral stenosis with severe pulmonary artery hypertension constitutes a high risk subset for surgical commissurotomy or valve replacement. Balloon mitral valvotomy has been proposed as a technique for treating high risk surgical patients with mitral stenosis. The efficacy of this technique in patients with severe pulmonary artery hypertension, however, has ...
Yamaura Y - - 1995
BACKGROUND AND AIM OF THE STUDY: Multiplane transesophageal echocardiography provides three-dimensional reconstruction of the mitral annulus from multiple cross-sectional views from a stable transducer position by rotating around a central axis. This study was designed to evaluate the effect of the type of annuloplasty ring on mitral annular configuration and ...
Boudoulas H - - 1995
Multidimensional left atrial (LA) performance indices have not been extensively studied in chronic mitral valve disease. LA maximal volume, stroke volume (LA volume at atrial systole minus LA minimal volume), LA ejection fraction (stroke volume/volume at atrial systole) and A-wave velocity, were measured in 14 patients with mitral stenosis (mean ...
Lee C Y - - 1995
OBJECTIVES: The aim of this study was to determine the safety profile, mitral valve outcome and follow-up functional status after percutaneous balloon mitral valvuloplasty (PBMV) in patients with mitral restenosis post-surgical commissurotomy. METHODS: Sixteen patients with symptomatic mitral restenosis after previous surgical commissurotomy underwent valvuloplasty using the Inoue balloon stepwise ...
Hutchison S J - - 1995
Reparative surgery for valvular insufficiency is attempted frequently. The success of surgery depends partly on the underlying etiology. To establish the morphological characteristics of rheumatic mitral valve disease (insufficiency) (n = 12), mitral insufficiency due to infective endocarditis (n = 12), mitral insufficiency postinfarction (n = 6), rheumatic (predominant) mitral ...
Litmanovitch M - - 1995
We report an 18-year-old patient with severe mitral stenosis complicated by right lower lobe pneumonia, sepsis, and shock. Intractable low cardiac output led to an emergency percutaneous balloon mitral valvotomy in a patient, resulting in immediately improved hemodynamic parameters. We are unaware of another report of percutaneous balloon mitral valvotomy ...
Lau K W - - 1995
Despite the established role of percutaneous balloon mitral valvuloplasty (BMV) in the treatment of mitral stenosis, major controversial issues in the realm of BMV persist. With increased operator experience, BMV has now been extended to include various controversial scenarios, such as mild mitral stenosis, adverse valve morphologies, and high-risk patients ...
Mark J B - - 1995
Pulmonary vein flow patterns measured with transesophageal echocardiography have been used recently to assess the severity of mitral valve regurgitation. This study was designed to determine whether regurgitant jet direction selectively influences the pattern of flow in right and left pulmonary veins. Thirty-seven patients undergoing mitral valve repair or replacement ...
von Bibra H - - 1995
OBJECTIVES: A multicenter study was carried out to evaluate the efficacy with which SHU 508A enhances left heart Doppler signals and improves the clinical quantification of valve disease. BACKGROUND: Poor signal-to-noise ratio often limits the Doppler interrogation of left heart flows. This problem may be resolved by the enhancement of ...
Brener S J - - 1995
OBJECTIVES: This study reports the results of echocardiographic follow-up in a large cohort of patients with aortic stenosis and correlates the progression of aortic stenosis with changes in the degree of mitral regurgitation and left ventricular hypertrophy and systolic dysfunction. BACKGROUND: Progressive aortic stenosis often causes left ventricular dysfunction and ...
Mele D - - 1995
BACKGROUND: Recent studies have shown that many instrument and physiological factors limit the ability of color Doppler total jet area within the receiving chamber to predict the severity of valvular regurgitation. In contrast, the proximal or initial dimensions of the jet as it emerges from the orifice have been shown ...
Fujimoto S - - 1995
We used magnetic resonance imaging (MRI) velocity mapping to assess the velocity profile of early diastolic mitral inflow in 11 normal subjects. Velocity maps of left ventricular inflow were obtained in the horizontal long axis of the left ventricle at the time of peak early diastolic filling. Velocity profile curves ...
Tice F D - - 1995
Transesophageal echocardiography and diagnostic cardiac catheterization were performed in 36 patients with symptomatic mitral stenosis to assess the incidence and significance of systolic flow reversal in the pulmonary veins. Mitral regurgitation was graded by contrast ventriculography, and left atrial pressure was directly measured after transseptal puncture. Pulmonary venous flow was ...
Xie G Y - - 1995
In vitro studies have demonstrated that regurgitant flow rate can be estimated by the color Doppler "proximal isovelocity surface area" (PISA) method. By applying the PISA method and continuity principle, we developed a formula to calculate mitral regurgitant volume: 2 pi r2.VN.FVI/Vo, where r = distance from the first jet ...
Robinson N M - - 1995
Percutaneous balloon mitral valvuloplasty is a standard alternative to surgery in a selected group of patients with symptomatic dominant rheumatic mitral stenosis. With careful transthoracic and transesophageal echocardiographic selection of patients, there is a low complication and high success rate. Echocardiography has also been established as extremely useful in the ...
Bahl V K - - 1994
Percutaneous transvenous mitral commissurotomy using the Inoue technique was performed in 390 cases of rheumatic mitral stenosis. There were 220 (56%) females and 170 (44%) males. The age range was 9-47 years [mean +/- S.D., 26 +/- 14) and all were symptomatic (New York Heart Association (NYHA) class II in ...
White M L - - 1994
RATIONALE AND OBJECTIVES: Mitral balloon commissurotomy (MBC) can successfully increase the mitral valve area (MVA) in mitral stenosis, but the outcome is variable. In multicenter studies, qualitative echocardiographic scores obtained before MBC are only weakly predictive of the increase in MVA after MBC. METHODS: To evaluate whether the change in ...
Starr A - - 1994
A 6-month-old male infant with partial atrioventricular canal defect and subaortic stenosis had a mitral valve releasing procedure to correct the subaortic stenosis with concomitant repair of the canal defect. An echocardiogram done 1 year after the operation shows no subaortic gradient and no mitral regurgitation. We present the details ...
Sharma S K - - 1994
This case report describes the anesthetic management of a 32-year-old parturient with combined severe mitral regurgitation and moderate mitral stenosis, complicated by fast atrial fibrillation. The advantageous effects of epidural analgesia during labor and vaginal delivery and the importance of invasive monitoring are discussed. We also report the rare complication ...
Waller B F - - 1994
This two-part article examines the histologic and morphologic basis for stenotic and purely regurgitant mitral valves. In Part I, conditions producing mitral valve stenosis were reviewed. In over 99% of stenotic mitral valves, the etiology is rheumatic disease. Other rare causes of mitral stenosis include congenitally malformed valves, active infective ...
Bahl V K - - 1994
In 136 consecutive patients who underwent percutaneous transvenous mitral commissurotomy (PTMC) with use of the single rubber-nylon (Inoue) balloon Inoue balloon angiographically analyzed subvalvular fibrosis was assessed retrospectively with regard to results and complications. There were 53 males and 83 females, with a mean age of 22 +/- 11 years ...
Waller B F - - 1994
This two-part article examines the histologic and morphologic basis for stenotic and purely regurgitant mitral valves. In Part I, conditions producing mitral valve stenosis are reviewed. In over 99% of stenotic mitral valves, the etiology is rheumatic disease. Other rare causes of mitral stenosis include congenital malformed valves, active infective ...
Yamagishi M - - 1994
Assessment of luminal stenosis plays a central role in the clinical decision makings for patients with heart diseases. To examine the role of Doppler echocardiography in the measurement of stenotic areas, we attempted to determine the mitral valve area and coronary artery stenosis by Doppler technique with a continuity equation. ...
Bensky A S - - 1994
A neonate diagnosed with aortic atresia and mitral hypoplasia had a ventriculocoronary artery communication demonstrated by use of echocardiography. These communications have been noted by angiography and on pathologic specimens in the past, but their clinical importance in the surgical management of these patients remains unclear. The ability to noninvasively ...
Grenon H - - 1994
To determine the association between mitral regurgitation and pulmonary edema localized in the right upper lobe, the authors reviewed 21 cases of mitral regurgitation secondary to dysfunction or rupture of the papillary muscle or rupture of the chordae tendineae cordis. The patients, 12 men and 9 women ranging in age ...
Ow E P - - 1994
Failure to recognize the presence of accessory mitral tissue causing subaortic stenosis can lead to not only the performance of inappropriate operations, but the persistence and recurrence of obstruction or even death. Over a 12-month period, we treated 2 children with severe subaortic stenosis caused by accessory mitral tissue. In ...
Narasimhan C - - 1994
We report the case of a young adult with mitral stenosis and pulmonary oedema who did not respond to conventional antifailure therapy, but improved with intravenous propranolol and later underwent successful balloon mitral valvotomy. Intravenous beta blockade, though contraindicated in most cases of pulmonary oedema, may benefit patients with mitral ...
Hwang J J - - 1994
The association between left atrial spontaneous echo contrast (SEC) and a history of systemic arterial embolization was evaluated in 359 consecutive patients with rheumatic mitral valve disease during a 3-year period. All patients underwent transesophageal echocardiographic (TEE) and cardiac catheterization studies. Of these, 207 patients had predominant mitral stenosis, 55 ...
Lau K W - - 1994
We demonstrate the feasibility and efficacy of Inoue balloon valvuloplasty in two patients with the rare combination of mitral stenosis and atrial septal aneurysm. Following the procedure, the mitral valve area increased from 1.3 cm2 to 2.7 cm2 and 1.2 cm2 to 2.6 cm2, respectively, with no major complications encountered.
Hutchinson S J - - 1994
Catheter balloon valvulotomy (CBV) is useful in the relief of rheumatic mitral stenosis. Morphologic scoring of the mitral valve by transthoracic echocardiography is predictive of success with CBV. Horizontal plane transesophageal echocardiography can obtain high quality images of the mitral valve and left atrium, but its value with routine use ...
Enriquez-Sarano M - - 1994
OBJECTIVES: The purpose of this study was to determine the feasibility, relation to other methods and significance of the effective regurgitant orifice area measurement. BACKGROUND: Assessment of the severity of valvular regurgitation (effective regurgitant orifice area) has not been implemented in clinical practice but can be made by Doppler echocardiography. ...
Kupferschmid J P - - 1994
A 78-year-old woman underwent mitral reconstruction, consisting of a quadrangular posterior leaflet resection without a concomitant annular ring, for symptomatic mitral regurgitation. Postoperatively she became hypotensive while being treated with dopamine. Transesophageal echocardiography revealed systolic anterior motion of the mitral valve with significant mitral regurgitation. With discontinuation of the dopamine ...
Abbo K M - - 1994
This review discusses the latest developments in the hemodynamics of mitral stenosis. English-language journal articles, reviews, and textbooks from the clinical, physiology, and engineering literature related to mitral valve stenosis were identified and reviewed. The main conclusions are: (1) the hemodynamics of mitral stenosis are determined by the complex anatomical ...
Antunes M J - - 1994
Percutaneous balloon commissurotomy has emerged as an alternative method for the treatment of mitral stenosis, and several comparative studied have recently claimed superior results as compared with those obtained by surgical commissurotomy. However, valve areas after balloon commissurotomy, calculated by Doppler echocardiography have, in the best cases, averaged 2.0-2.2 cm2 ...
Roberts J W - - 1994
There are well-defined roles for echocardiography in the evaluation of patients with mitral stenosis who undergo percutaneous transvenous mitral commissurotomy. Transthoracic echocardiography is used to assess mitral valve morphology with particular attention to commissural fusion and valve leaflet calcification, the two most important determinants of the severity of mitral stenosis. ...
Albertucci M - - 1994
We report a patient with a large submitral ridge of muscular and fibrous tissue that divides the left ventricle into two distinct chambers causing inlet and outlet obstruction. Doppler echocardiography revealed obstruction to both filling and ejection. Echocardiography demonstrated that the obstruction was in series with the mitral apparatus. Surgery ...
Stojnić B B - - 1993
In 13 patients with isolated mitral stenosis in sinus rhythm the pulmonary venous flow was evaluated by transoesophageal pulsed Doppler echocardiography. The patients were divided into two groups according to their mitral valve area (MVA); Group I (MVA < 1.5 cm2, n = 7 patients); and Group II (MVA > ...
Lee M M - - 1993
To determine whether pulmonary venous flow measured by transesophageal Doppler echocardiography can be used to estimate mean left atrial pressure (LAP), we prospectively studied 12 consecutive patients with sinus rhythm undergoing percutaneous mitral balloon commissurotomy for their severe mitral stenosis (mitral valve area < 1.5 cm2). We correlated Doppler variables ...
Goswami K C - - 1993
To determine whether mitral valve (MV) morphology influences the result of balloon mitral valvuloplasty (BMV) for mitral stenosis, two-dimensional echocardiography was performed before BMV in 53 patients and in 25 normal controls. The two-dimensional echocardiographic features of MV leaflets: thickness, length and motion, diastolic MV excursion, chordal length, MV annular ...
Rebergen S A - - 1993
BACKGROUND: Pulmonary regurgitation frequently occurs after surgical correction of tetralogy of Fallot. To date, reliable quantitation of pulmonary regurgitation has not been possible, and therefore the clinical significance of pulmonary regurgitation is controversial. Nuclear magnetic resonance (NMR) velocity mapping allows accurate measurement of volumetric flow. The feasibility and accuracy of ...
Bahl V K - - 1993
Eleven patients with symptomatic isolated non-calcific mitral stenosis were treated with retrograde nontransseptal balloon mitral valvuloplasty. This new technique utilizes a specifically designed steerable catheter to enter the left atrium retrogradely via the left ventricle thus avoiding transseptal puncture, an essential step in other methods of balloon mitral valvuloplasty. Technical ...
Morea M - - 1993
M-mode and two-dimensional echocardiographic images were obtained using the planimeter method in the short axis view and calculated by Doppler-derived pressure half-time in 24 patients with mitral stenosis before and after surgical commissurotomy and posterior annuloplasty. The diameter of the mitral valve annulus was measured in the standard long axis ...
Carroll J D JD Cardiology Section, Hans Hecht Hemodynamics Laboratory, IL - - 1993
This review discusses the latest developments in selected clinical features and catheter-based therapy of mitral stenosis. English-language journal articles and reviews in the clinical and epidemiological literature as related to mitral valve stenosis from 1965 through March 1993, identified by bibliography review and expert consultation. Selected studies included clinical trials ...
Raju R - - 1993
A 28-year-old woman with mirror-image dextrocardia and severe rheumatic mitral stenosis underwent successful percutaneous balloon mitral valvuloplasty (PBMV). Standard technique was altered to include transseptal catheterization via the left femoral vein and inter-atrial septal puncture with the transseptal needle rotated to a 7 o'clock position. The predilatation transmitral gradient (mean) ...
Goldstein S A - - 1993
Percutaneous transvenous balloon mitral valvuloplasty is a well-established alternative to surgical commissurotomy for selected symptomatic patients with rheumatic mitral stenosis. This procedure normally is performed with fluoroscopic guidance; however, even the experienced operator can be misled by radiographic landmarks. The addition of on-line TEE during PBMV facilitates the success and ...
Alfonso F - - 1993
The aim of this study was to assess the initial and midterm outcome of patients with severe pulmonary hypertension undergoing percutaneous mitral valvuloplasty (PMV). Accordingly, the baseline characteristics, immediate results and follow-up of 64 consecutive patients with severe pulmonary artery hypertension (systolic pulmonary artery pressure > or = 60 mm ...
< 5 6 7 8 9 10 11 12 13 14 15 >