Publications
Below you can find a list of our published research.
Below you can find a list of our published research.
112 results
The Annals of thoracic surgery, Volume 106, Issue 4, 7 1 2018, Pages 1241-1244 Initial Experience and Early Results of Mitral Valve Repair With CardioCel Pericardial Patch. Tomšič A, Bissessar DD, van Brakel TJ, Marsan NA, Klautz RJM, Palmen M
Purpose: The objective of this study was to assess the performance of a tissue engineering process-treated bovine pericardium patch (CardioCel, Admedus Regen Pty Ltd, Perth, Australia) in the setting of reconstructive mitral valve surgical procedures. Description: Between March 2014 and April 2016, 30 patients (57.2 ± 14.3 years of age; 27% female) underwent mitral valve leaflet repair with a CardioCel patch. Evaluation: Perioperative mortality was 7% (2 patients, non-graft related). In the 28 r... Abstract
Cited 10 times since 2018 (1.7 per year) source: EuropePMC
Journal of cardiology, Volume 72, Issue 6, 31 5 2018, Pages 473-479 Long-term results of mitral valve repair for severe mitral regurgitation in asymptomatic patients. Tomšič A, Hiemstra YL, van Hout FMA, van Brakel TJ, Versteegh MIM, Marsan NA, Klautz RJM, Palmen M
Background: In asymptomatic patients with severe degenerative mitral valve regurgitation (MR), early surgery is often performed in experienced centers. The patient- and valve-related results and the quality of life after surgery in these patients remain insufficiently explored. Methods: Between 1/2000 and 12/2015, 83 asymptomatic patients (mean age 56.6±12.6 years, 21 female) without any complications related to long-lasting MR underwent early surgery. Follow-up clinical and echocardiographic da... Abstract
Cited 2 times since 2018 (0.3 per year) source: EuropePMC
Interactive cardiovascular and thoracic surgery, Volume 26, Issue 5, 1 1 2018, Pages 783-789 Early and long-term outcomes of mitral valve repair for Barlow's disease: a single-centre 16-year experience. Tomšic A, Hiemstra YL, van der Pas SL, Putter H, Versteegh MIM, van Brakel TJ, Ajmone Marsan N, Klautz RJM, Palmen M
Objectives: Following mitral valve repair for Barlow's disease, recurrent mitral regurgitation (MR) is believed to occur frequently and is mainly attributed to disease progression. Methods: Between January 2000 and December 2015, 180 patients (40% women, mean age 58.7 ± 13.5 years) with Barlow's disease underwent mitral valve repair. To provide a longitudinal assessment of mitral valve repair durability, a multistate model for interval-censored observations (4 states: 1, Grade 0/1+ MR;... Abstract
Cited 1 times since 2018 (0.2 per year) source: EuropePMC
Interactive cardiovascular and thoracic surgery, Volume 26, Issue 4, 1 1 2018, Pages 566-572 Outcome reporting for surgical treatment of degenerative mitral valve disease: a systematic review and critical appraisal. Tomšic A, Arabkhani B, Schoones JW, van Brakel TJ, Takkenberg JJM, Palmen M, Klautz RJM
Objectives: Standardized outcome reporting is of critical importance for performance monitoring, improvement of existing techniques and introduction of novel technologies. Whether outcome reporting for surgical treatment of degenerative mitral valve disease complies with the guidelines has not been assessed to date. Methods: A systematic review of PubMed, EMBASE, Web of Science and the Cochrane Library was conducted for articles published between 1 January 2009 and 7 March 2016. Inclusion criter... Abstract
Cited 5 times since 2018 (0.8 per year) source: EuropePMC
Interactive cardiovascular and thoracic surgery, Volume 26, Issue 4, 1 1 2018, Pages 610-616 Early and late results of surgical treatment for isolated active native mitral valve infective endocarditis. Tomšic A, Versteegh MIM, Ajmone Marsan N, van Brakel TJ, Klautz RJM, Palmen M
Objectives: Native mitral valve infective endocarditis (IE) is a complicated disease with high mortality and morbidity rates. Mitral valve repair (MVRep) is feasible when limited valve destruction is present. However, recurrent valve dysfunction and reintervention are common. Methods: Between January 2000 and March 2016, 83 patients underwent surgery for isolated active native mitral valve IE. We applied an early surgery, MVRep-oriented approach with progressive utilization of patch techniques t... Abstract
Cited 2 times since 2018 (0.3 per year) source: EuropePMC
Interactive cardiovascular and thoracic surgery, Volume 26, Issue 4, 1 1 2018, Pages 559-565 Mitral valve repair in Barlow's disease with bileaflet prolapse: the effect of annular stabilization on functional mitral valve leaflet prolapse. Tomšic A, Hiemstra YL, Bissessar DD, van Brakel TJ, Versteegh MIM, Ajmone Marsan N, Klautz RJM, Palmen M
Objectives: Barlow's disease is the most severe form of degenerative mitral valve disease, commonly characterized by bileaflet prolapse. Abnormal mitral annular dynamics is typically present and results in functional prolapse of the mitral leaflets that may be addressed with annular stabilization alone. Methods: Between January 2001 and December 2015, 128 patients with Barlow's disease and bileaflet prolapse underwent valve repair. This included anterior mitral valve leaflet (AMVL) rep... Abstract
Cited 13 times since 2018 (2.1 per year) source: EuropePMC
European heart journal. Cardiovascular Imaging, Volume 19, Issue 2, 1 1 2018, Pages 176-184 Three-dimensional assessment of mitral valve annulus dynamics and impact on quantification of mitral regurgitation. van Wijngaarden SE, Kamperidis V, Regeer MV, Palmen M, Schalij MJ, Klautz RJ, Bax JJ, Ajmone Marsan N, Delgado V
Aims: To assess mitral annulus dynamics in primary and secondary mitral regurgitation (MR) with 3-dimensional transesophageal echocardiography (3D TEE) and the impact on MR quantification. Methods and results: One hundred and twenty-three patients with moderate and severe MR (63 ± 11 years, 78 males) and 29 controls (59 ± 15 years, 19 males) were evaluated. Functional MR (FMR) was present in 31 patients, fibroelastic deficiency (FED) in 52 and Barlow's disease (BD) in 40. Annular geometry w... Abstract
Cited 1 times since 2018 (0.2 per year) source: EuropePMC
The Journal of thoracic and cardiovascular surgery, Volume 155, Issue 2, 1 1 2018, Pages 600-601 Respect versus resect: Two different repair techniques or two different tools in the toolbox? Tomšič A, Klautz RJM, Palmen M
Interactive cardiovascular and thoracic surgery, Volume 26, Issue 2, 1 1 2018, Pages 256 eComment. Posterior mitral valve leaflet prolapse: one term, several different meanings. Tomsic A, Klautz RJM, Palmen M
Cited 1 times since 2018 (0.2 per year) source: EuropePMC
Multimedia manual of cardiothoracic surgery : MMCTS, Volume 2018, 25 4 2018, Pages http://mmcts.org/tutorial/884 Bileaflet pericardial patch repair for rheumatic mitral valve disease. Bissessar D, Tomšič A, van Brakel T, Klautz R, Palmen M
Surgical repair in rheumatic mitral valve disease is technically challenging as the disease affects both valvular and subvalvular structures. Due to the resultant shortage of pliable valve tissue, pericardial patch techniques are progressively used to restore normal valve function. This makes mitral valve repair possible even in the most severe forms of rheumatic mitral valve disease. In this tutorial, we report a case of mitral valve repair with a bileaflet (decellularized) pericardial patch in... Abstract
Cited 4 times since 2017 (0.6 per year) source: EuropePMC
European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery, Volume 52, Issue 6, 1 1 2017, Pages 1161-1167 Right ventricular dysfunction after surgical left ventricular restoration: prevalence, risk factors and clinical implications. Couperus LE, Delgado V, van Vessem ME, Tops LF, Palmen M, Braun J, Verwey HF, Klautz RJM, Schalij MJ, Beeres SLMA
Objectives: Surgical left ventricular (LV) restoration (SVR) induces changes in LV systolic and diastolic function that may affect postoperative right ventricular (RV) function. This study aimed to evaluate the long-term effect of SVR on RV function, with specific focus on determinants and prognostic implications of RV dysfunction. Methods: Eighty-six patients (age 60 ± 10 years, 73% male) with clinical and echocardiographic follow-up 2 years after SVR were included. RV dysfunction was defined a... Abstract
Cited 8 times since 2017 (1.1 per year) source: EuropePMC
European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery, Volume 51, Issue 6, 1 1 2017, Pages 1100-1107 Extensive infective endocarditis of the aortic root and the aortic-mitral continuity: a mitral valve sparing approach†. Tomšic A, Schneider AW, Palmen M, van Brakel TJ, Versteegh MIM, Klautz RJM
Objectives: Severe cases of infective endocarditis (IE) of the aortic valve can cause aortic root destruction and affect the surrounding structures, including the aortic-mitral continuity, the anterior mitral valve leaflet and the roof of the left atrium. Reconstruction after resection of all infected tissue remains challenging. We describe our surgical approach and the mid-term results. Methods: Between January 2004 and December 2015, 35 patients underwent surgery for extensive IE of the aortic... Abstract
Cited 4 times since 2017 (0.6 per year) source: EuropePMC
ASAIO journal (American Society for Artificial Internal Organs : 1992), Volume 63, Issue 3, 1 1 2017, Pages 266-272 Pump Speed Optimization in Stable Patients with a Left Ventricular Assist Device. Couperus LE, Delgado V, Khidir MJH, Vester MPM, Palmen M, Fiocco M, Holman ER, Tops LF, Klautz RJM, Verwey HF, Schalij MJ, Beeres SLMA
Optimal left ventricular assist device (LVAD) functioning and preservation of right ventricular (RV) function are major survival determinants in destination therapy (DT)-LVAD recipients. Currently, the indication for routine pump speed optimization in stable patients and its effect on RV function at follow-up remain underexplored. Hemodynamically stable patients (N = 17, age 61 [interquartile range {IQR} 51-66] years; 13 [77%] male) underwent a routine speed ramp test. Echocardiographic images w... Abstract
Cited 13 times since 2017 (1.8 per year) source: EuropePMC
European journal of cardio-thoracic surgery : official journal of the European Association for Cardio-thoracic Surgery, Volume 51, Issue 3, 1 1 2017, Pages 532-538 Incidence and predictors of vasoplegia after heart failure surgery. van Vessem ME, Palmen M, Couperus LE, Mertens B, Berendsen RR, Tops LF, Verwey HF, de Jonge E, Klautz RJ, Schalij MJ, Beeres SL
Objectives: Vasoplegia has been described as a complication after cardiac surgery, particularly in patients with a poor left ventricular ejection fraction. The aim of this study was to assess the incidence, survival and predictors of vasoplegia in patients undergoing heart failure surgery and to propose a risk model. Methods: A retrospective study including heart failure patients who underwent surgical left ventricular restoration, CorCap implantation or left ventricular assist device implantati... Abstract
Cited 9 times since 2017 (1.2 per year) source: EuropePMC
Annals of intensive care, Volume 7, Issue 1, 23 4 2017, Pages 20 Hemodynamic effects of short-term hyperoxia after coronary artery bypass grafting. Helmerhorst HJF, de Wilde RBP, Lee DH, Palmen M, Jansen JRC, van Westerloo DJ, de Jonge E
Background: Although oxygen is generally administered in a liberal manner in the perioperative setting, the effects of oxygen administration on dynamic cardiovascular parameters, filling status and cerebral perfusion have not been fully unraveled. Our aim was to study the acute hemodynamic and microcirculatory changes before, during and after arterial hyperoxia in mechanically ventilated patients after coronary artery bypass grafting (CABG) surgery. Methods: This was a single-center physiologica... Abstract
Cited 3 times since 2016 (0.4 per year) source: EuropePMC
Multimedia manual of cardiothoracic surgery : MMCTS, Volume 2017, 6 1 2016 Optimal surgical mitral valve repair in Barlow's disease: the concept of functional prolapse. Klautz RJ, Tomšič A, Palmen M, van Brakel TJ, Perier P
Barlow's disease presents the most severe form of degenerative mitral valve disease as it normally affects various valvular structures and segments. We discuss the technical aspects of mitral valve repair in this setting. Furthermore, the concept of "functional prolapse" of the mitral valve is discussed as well as recommendations on when to proceed with surgical correction of anterior leaflet prolapse. Abstract
Cited 9 times since 2016 (1.2 per year) source: EuropePMC
The Journal of thoracic and cardiovascular surgery, Volume 153, Issue 4, 23 4 2016, Pages 845-852 Right ventricular dysfunction affects survival after surgical left ventricular restoration. Couperus LE, Delgado V, Palmen M, van Vessem ME, Braun J, Fiocco M, Tops LF, Verwey HF, Klautz RJ, Schalij MJ, Beeres SL
Objective: Several clinical and left ventricular parameters have been associated with prognosis after surgical left ventricular restoration in patients with ischemic heart failure. The aim of this study was to determine the prognostic value of right ventricular function. Methods: A total of 139 patients with ischemic heart failure (62 ± 10 years; 79% were male; left ventricular ejection fraction 27% ± 7%) underwent surgical left ventricular restoration. Biventricular function was assessed with e... Abstract
Cited 4 times since 2016 (0.5 per year) source: EuropePMC
Interactive cardiovascular and thoracic surgery, Volume 23, Issue 6, 1 1 2016, Pages 979-981 Left ventricular assist device implantation in patients after left ventricular reconstruction. Palmen M, Braun J, Beeres SL, Klautz RJ
Left ventricular assist device (LVAD) implantation can be challenging in patients with a prior surgical ventricular restoration (SVR). In this case series of heart failure patients with a history of SVR, we describe the surgical technique and outcome of a customized approach for inflow cannula orientation. Seven patients with a history of SVR with end-stage chronic heart failure were accepted for long-term LVAD support. In all patients, the Dacron patch was removed through left ventriculotomy an... Abstract
Cited 1 times since 2016 (0.1 per year) source: EuropePMC
The Canadian journal of cardiology, Volume 32, Issue 12, 19 3 2016, Pages 1576.e7-1576.e9 Prosthesis Dislocation After Transapical Valve-In-Valve Mitral Valve Implantation. Tomšič A, Palmen M, Versteegh MI, van der Kley F, Siebelink HJ, Berendsen RR, Schalij MJ
Transapical valve-in-valve mitral valve implantation (TA-MVI) has been described as an alternative treatment option in patients with degenerated bioprostheses in the mitral position. We report the first case of prosthesis dislocation and migration into the left atrium after TA-MVI. A new prosthesis was implanted using the same approach. The dislocated prosthesis was successfully removed through the left atrial appendage through an extended anterolateral thoracotomy without the use of cardiopulmo... Abstract
Cited 7 times since 2016 (0.8 per year) source: Scopus
Journal of geriatric cardiology : JGC, Volume 13, Issue 1, 1 1 2016, Pages 31-36 Impact of age on transcatheter aortic valve implantation outcomes: a comparison of patients aged ≤ 80 years versus patients > 80 years. van der Kley F, van Rosendael PJ, Katsanos S, Kamperidis V, Marsan NA, Karalis I, de Weger A, Palmen M, Bax JJ, Schalij MJ, Delgado V
Objective: To investigate the procedural outcomes and the long-term survival of patients undergoing transcatheter aortic valve implantation (TAVI) and compare study results of patients ≤ 80 years and patients > 80 years old. Methods: A total of 240 patients treated with TAVI were divided into two groups according to age ≤ 80 years (n = 105; 43.8%) and > 80 years (n = 135; 56.2%). The baseline characteristics and the procedural outcomes were compared between these two groups of patients. Re... Abstract