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Wallby, Lars
Publications (10 of 17) Show all publications
Trzebiatowska-Krzynska, A., Driessen, M., Sieswerda, G. T., Wallby, L., Swahn, E. & Meijboom, F. (2015). Knowledge-based 3D reconstruction of the right ventricle: comparison with cardiac magnetic resonance in adults with congenital heart disease. Echo research and practice, 2(4), 109-116
Open this publication in new window or tab >>Knowledge-based 3D reconstruction of the right ventricle: comparison with cardiac magnetic resonance in adults with congenital heart disease
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2015 (English)In: Echo research and practice, ISSN 2055-0464, Vol. 2, no 4, p. 109-116Article in journal (Refereed) Published
Abstract [en]

AIM: Assessment of right ventricular (RV) function is a challenge, especially in patients with congenital heart disease (CHD). The aim of the present study is to assess whether knowledge-based RV reconstruction, used in the everyday practice of an echo-lab for adult CHD in a tertiary referral center, is accurate when compared to cardiac magnetic resonance (CMR) examination.

SUBJECTS AND METHODS: Adult patients who would undergo CMR for assessment of the RV were asked to undergo an echo of the heart for further knowledge-based reconstruction (KBR). Echocardiographic images were acquired in standard views using a predefined imaging protocol. RV volumes and ejection fraction (EF) calculated using knowledge-based technology were compared with the CMR data of the same patient.

RESULTS: Nineteen consecutive patients with congenital right heart disease were studied. Median age of the patients was 28 years (range 46 years). Reconstruction was possible in 16 out of 19 patients (85%). RV volumes assessed with this new method were smaller than with CMR. Indexed end diastolic volumes were 114±17 ml vs 121±19 ml, P<0.05 and EFs were 45±8% vs 47±9%, P<0.05 respectively. The correlation between the methods was good with an intraclass correlation of 0.84 for EDV and 0.89 for EF, P value <0.001 in both cases.

CONCLUSION: KBR enables reliable measurement of RVs in patients with CHDs and can be used in clinical practice for analysis of volumes and EFs.

Keywords
congenital heart disease; knowledge-based reconstruction; right ventricle volume; ventripoint system
National Category
Cardiac and Cardiovascular Systems
Identifiers
urn:nbn:se:liu:diva-124289 (URN)10.1530/ERP-15-0029 (DOI)26796613 (PubMedID)
Available from: 2016-01-25 Created: 2016-01-25 Last updated: 2019-01-07
Baranowski, J., Wallby, L., Nylander, E., Boano, G., Vanky, F., Löfstöm, L., . . . Nielsen, N.-E. (2014). MitraClip after myocardial infarction with papillary muscle rupture and as treatment of systolic anterior motion of the mitral valve.. In: : . Paper presented at ICI&CSI 2014, Frankfurt, Tyskland.
Open this publication in new window or tab >>MitraClip after myocardial infarction with papillary muscle rupture and as treatment of systolic anterior motion of the mitral valve.
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2014 (English)Conference paper, Oral presentation only (Refereed)
National Category
Cardiac and Cardiovascular Systems
Identifiers
urn:nbn:se:liu:diva-114081 (URN)
Conference
ICI&CSI 2014, Frankfurt, Tyskland
Available from: 2015-02-07 Created: 2015-02-07 Last updated: 2015-03-30
Baranowski, J., Wallby, L., Ahn, H., Dahlin, L.-G., Nylander, E., Lindgren, B., . . . Nielsen, N.-E. (2014). TAVI without balloon predilation. A ramdomized single centre study.. In: : . Paper presented at ICI&CSI 2014, Frankfurt, Tyskland.
Open this publication in new window or tab >>TAVI without balloon predilation. A ramdomized single centre study.
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2014 (English)Conference paper, Poster (with or without abstract) (Refereed)
National Category
Cardiac and Cardiovascular Systems
Identifiers
urn:nbn:se:liu:diva-114078 (URN)
Conference
ICI&CSI 2014, Frankfurt, Tyskland
Available from: 2015-02-07 Created: 2015-02-07 Last updated: 2015-03-30
Nielsen, N.-E., Wallby, L., Wolfgang, F., Ahn, H. & Baranowski, J. (2014). Total percutaneous transcatheter valve implantation in native mitral stenosis in a patinent with previous transapical TACI. In: : . Paper presented at ICI&CSI 2014, Frankfurt, Tyskland.
Open this publication in new window or tab >>Total percutaneous transcatheter valve implantation in native mitral stenosis in a patinent with previous transapical TACI
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2014 (English)Conference paper, Oral presentation with published abstract (Refereed)
National Category
Cardiac and Cardiovascular Systems
Identifiers
urn:nbn:se:liu:diva-114083 (URN)
Conference
ICI&CSI 2014, Frankfurt, Tyskland
Available from: 2015-02-07 Created: 2015-02-07 Last updated: 2015-03-31
Nielsen, N.-E., Wallby, L., Johansson, M., Ahn, H., Dahlin, L.-G. & Baranowski, J. (2014). Transcatheter valve implantation in 4 year old degenerated TAVI. In: : . Paper presented at Transcatheter valve implantation in 4 year old degenerated TAVI.
Open this publication in new window or tab >>Transcatheter valve implantation in 4 year old degenerated TAVI
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2014 (English)Conference paper, Oral presentation with published abstract (Refereed)
National Category
Cardiac and Cardiovascular Systems
Identifiers
urn:nbn:se:liu:diva-114082 (URN)
Conference
Transcatheter valve implantation in 4 year old degenerated TAVI
Available from: 2015-02-07 Created: 2015-02-07 Last updated: 2015-03-31
Nielsen, N.-E., Wallby, L., Freter, W., Ahn, H. & Baranowski, J. (2014). Transcatheter valve implantation in a leaking degenerated aortic homograft. In: : . Paper presented at ICI&CSI 2014 Frankfurt, Tyskland.
Open this publication in new window or tab >>Transcatheter valve implantation in a leaking degenerated aortic homograft
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2014 (English)Conference paper, Oral presentation with published abstract (Refereed)
National Category
Cardiac and Cardiovascular Systems
Identifiers
urn:nbn:se:liu:diva-114080 (URN)
Conference
ICI&CSI 2014 Frankfurt, Tyskland
Available from: 2015-02-07 Created: 2015-02-07 Last updated: 2015-03-31
Nielsen, N.-E., Wallby, L., Ahn, H. C., Dahlin, L.-G., Nylander, E., Lindgren, B., . . . Baranowski, J. (2014). Transcatheter valve-in-valve - an elegant solution to a surgical problem.. In: : . Paper presented at ICI&CSI 2014, Frankfurt, Tyskland.
Open this publication in new window or tab >>Transcatheter valve-in-valve - an elegant solution to a surgical problem.
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2014 (English)Conference paper, Published paper (Refereed)
National Category
Cardiac and Cardiovascular Systems
Identifiers
urn:nbn:se:liu:diva-114079 (URN)
Conference
ICI&CSI 2014, Frankfurt, Tyskland
Available from: 2015-02-07 Created: 2015-02-07 Last updated: 2015-03-31
Baranowski, J., Dahlin, L.-G., Nielsen, N.-E., Nylander, E., Wallby, L. & Ahn, H. (2013). Transcatheter aortic valve implantation without prior balloon dilatation - a non-randomized single centre experience. In: : . Paper presented at Thoraxmöte 16-18 oktober 2013, Linköping.
Open this publication in new window or tab >>Transcatheter aortic valve implantation without prior balloon dilatation - a non-randomized single centre experience
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2013 (Swedish)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-100830 (URN)
Conference
Thoraxmöte 16-18 oktober 2013, Linköping
Available from: 2013-11-13 Created: 2013-11-13 Last updated: 2013-11-25
Ahn, H., Baranowski, J., Dahlin, L.-G., Nielsen, N.-E., Nylander, E. & Wallby, L. (2012). TAVI without concomitant balloon dilatation. Paper presented at 4th Joint Scandinavian Conference in Cardiothoracic Surgery, 16-18 August 2012, Vilnius, Lithuania.
Open this publication in new window or tab >>TAVI without concomitant balloon dilatation
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2012 (English)Conference paper, Published paper (Other academic)
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-87607 (URN)
Conference
4th Joint Scandinavian Conference in Cardiothoracic Surgery, 16-18 August 2012, Vilnius, Lithuania
Available from: 2013-01-19 Created: 2013-01-19 Last updated: 2013-02-04
Baranowski, J., Ahn, H., Freter, W., Nielsen, N.-E., Nylander, E., Janerot-Sjöberg, B., . . . Wallby, L. (2011). Echo-guided presentation of the aortic valve minimises contrast exposure in transcatheter valve recipients. Catheterization and cardiovascular interventions, 77(2), 272-275
Open this publication in new window or tab >>Echo-guided presentation of the aortic valve minimises contrast exposure in transcatheter valve recipients
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2011 (English)In: Catheterization and cardiovascular interventions, ISSN 1522-1946, E-ISSN 1522-726X, Vol. 77, no 2, p. 272-275Article in journal (Refereed) Published
Abstract [en]

OBJECTIVES:

We have developed a method using transthoracic echocardiography in establishing optimal visualization of the aortic root, to reduce the amount of contrast medium used in each patient.

BACKGROUND:

During transcatheter aortic valve implantation, it is necessary to obtain an optimal fluoroscopic projection for deployment of the valve showing the aortic ostium with the three cusps aligned in the beam direction. This may require repeat aortic root angiograms at this stage of the procedure with a high amount of contrast medium with a risk of detrimental influence on renal function.

METHODS:

We studied the conventional way and an echo guided way to optimize visualisation of the aortic root. Echocardiography was used initially allowing easier alignment of the image intensifier with the transducer's direction.

RESULTS:

Contrast volumes, radiation/fluoroscopy exposure times, and postoperative creatinine levels were significantly less in patients having the echo-guided orientation of the optimal fluoroscopic angles compared with patients treated with the conventional approach.

CONCLUSION:

We present a user-friendly echo-guided method to facilitate fluoroscopy adjustment during transcatheter aortic valve implantation. In our series, the amounts of contrast medium and radiation have been significantly reduced, with a concomitant reduction in detrimental effects on renal function in the early postoperative phase.

Keywords
aortic valve stenosis;heart valve prosthesis;transthoracic echocardiography
National Category
Medical and Health Sciences
Identifiers
urn:nbn:se:liu:diva-74503 (URN)10.1002/ccd.22747 (DOI)20824753 (PubMedID)
Available from: 2012-01-30 Created: 2012-01-30 Last updated: 2017-12-08
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