MLMattie J. Lenzen

Mattie J. Lenzen

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Mattie J. Lenzen has a total of 105 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Open Access

    Effects of a Dedicated Cardiac Rehabilitation Program for Patients With Obesity on Body Weight, Physical Activity, Sedentary Behavior, and Physical Fitness: The OPTICARE XL Randomized Controlled Trial

    by Iris Den Uijl, Rita J G van Den Berg-Emons, Madoka Sunamura, Mattie J Lenzen, Henk J Stam, Eric Boersma, Nicole C C W Tenbült-Van Limpt, Hareld M C Kemps, Marcel L Geleijnse, Nienke ter Hoeve

    Previously published results of the OPTICARE XL open label randomized controlled trial showed no added value of OPTICARE XL CR, a dedicated cardiac rehabilitation (CR) program for patients with obesity, with respect to health–related quality of life (primary outcome). This clinical trial studied the effects of OPTICARE XL CR on several secondary outcomes, which included body weight, physical activity, sedentary behavior, and physical fitness. Patients with coronary artery disease or atrial fibrillation and body mass index ≥ 30 were randomized to OPTICARE XL CR (n = 102) or standard CR (n = 99). OPTICARE XL CR was a 1-year group intervention, specifically designed for patients with obesity that included aerobic and strength exercise, behavioral coaching, and an aftercare program. Standard CR consisted of a 6- to 12-week group aerobic exercise program, supplemented with cardiovascular lifestyle education. Study end points included body weight, physical activity, sedentary behavior (accelerometer), and physical fitness (6-Minute Walk Test and handgrip strength), which were evaluated 6 months after the end of CR (primary endpoint) and 3 months after the start of CR. Six months after completion of either program, improvements in body weight, physical activity, sedentary behavior, and physical fitness were similar between the groups. Three months after CR start, patients randomized to OPTICARE XL CR showed greater weight loss (mean change = −3.6 vs −1.8 kg) and a larger improvement in physical activity (+880 vs +481 steps per day) than patients randomized to standard CR. Patients allocated to OPTICARE XL CR lost significantly more body weight and showed promising results with respect to physical activity 3 months after the start of CR; however, these short-term results were not expanded or sustained in the longer term. Patients with obesity do not benefit from standard CR programs. The new OPTICARE XL CR program showed its effects in the short term on weight loss and physical activity, and, therefore, redesign of the aftercare phase is recommended.


  • Open Access

    Clinical Outcomes with Targeted Temperature Management (TTM) in Comatose Out-of-Hospital Cardiac Arrest Patients—A Retrospective Cohort Study

    by Niels T. B. Scholte, Christiaan van Wees, Wim J. R. Rietdijk, Marisa van der Graaf, Lucia S. D. Jewbali, Mathieu van der Jagt, Remco C. M. van Den Berg, Mattie J. Lenzen, Corstiaan A. Den Uil

    Purpose: we evaluated the effects of the shift of a targeted temperature management (TTM) strategy from 33 °C to 36 °C in comatose out-of-hospital cardiac arrest (OHCA) patients admitted to the Intensive Care Unit (ICU). Methods: we performed a retrospective study of all comatose (GCS < 8) OHCA patients treated with TTM from 2010 to 2018 (n = 798) from a single-center academic hospital. We analyzed 90-day mortality, and neurological outcome (CPC score) at ICU discharge and ICU length of stay, as primary and secondary outcomes, respectively. Results: we included 798 OHCA patients (583 in the TTM33 group and 215 in the TTM36 group). We found no association between the TTM strategy (TTM33 and TTM36) and 90-day mortality (hazard ratio (HR)] 0.877, 95% CI 0.677–1.135, with TTM36 as reference). Also, no association was found between TTM strategy and favorable neurological outcome at ICU discharge (odds ratio (OR) 1.330, 95% CI 0.941–1.879). Patients in the TTM33 group had on average a longer ICU LOS (beta 1.180, 95% CI 0.222–2.138). Conclusion: no differences in clinical outcomes—both 90-day mortality and favorable neurological outcome at ICU discharge—were found between targeted temperature at 33 °C and 36 °C. These results may help to corroborate previous trial findings and assist in implementation of TTM.


  • Open Access

    Multidimensional Prognostic Index and Outcomes in Older Patients Undergoing Transcatheter Aortic Valve Implantation: Survival of the Fittest

    by Jeannette A. Goudzwaard, Sadhna Chotkan, Marjo J. A. G. De Ronde-Tillmans, Mattie J. Lenzen, Maarten P. H. van Wiechen, Joris F. W. Ooms, Harmke A. Polinder-Bos, Madelon de Beer-Leentfaar, Nicolas M. Van Mieghem, Joost Daemen, et al.

    Selecting patients with a high chance of endured benefit from transcatheter aortic valve implantation (TAVI) is becoming relevant with changing indications and increasing number of TAVI being performed. The aim of our study was to investigate the association of the multidimensional prognostic index (MPI) based on a comprehensive geriatric assessment (CGA) on survival. The TAVI Care & Cure program is a prospective, observational registry of patients referred for TAVI at the Erasmus MC University Medical Center. Consecutive patients who underwent a complete CGA and TAVI were included. CGA components were used to calculate the MPI score. The impact of the MPI score on survival was evaluated using Cox regression. Furthermore, 376 patients were included, 143 (38.0%) patients belonged to the MPI-1 group and 233 (61.9%) patients to the MPI-2–3 group. After 3 years, 14.9% of the patients in the MPI-1 group and 30.5% of the patients in the MPI-2–3 group died (p = 0.001). Patients in MPI-1 had increased chances of overall survival in comparison with patients in MPI group 2–3 Hazard Ratio (HR) 0.57, (95% Confidence Interval (CI) 0.33–0.98)). In this study we found that the MPI tool could be useful to assess frailty and to predict which patient will have a higher chance of enduring benefit from a TAVI procedure.


  • Open Access

    Physical Activity and Sedentary Behavior in Cardiac Rehabilitation: Does Body Mass Index Matter?

    by Iris Den Uijl, Nienke ter Hoeve, Madoka Sunamura, Mattie J Lenzen, Hanneke E M Braakhuis, Henk J Stam, Eric Boersma, Rita J G van Den Berg-Emons

    The purpose of this study was to investigate the relationship between body mass index (BMI) class and physical activity and sedentary behavior in patients with acute coronary syndrome (ACS) during cardiac rehabilitation (CR). This study was a secondary analysis of the OPTICARE trial. Physical activity and sedentary behavior were measured in participants with ACS (n = 359) using actigraphy at baseline, directly after completion of a multidisciplinary 12-week exercise-based CR program and 9 months thereafter. Outcome measures were step count and duration of time (percentage of wear time) spent in light physical activity, moderate-to-vigorous physical activity, and sedentary behavior. Participants were classified as normal weight (BMI = 18.5–24.99 kg/m2; n = 82), overweight (BMI = 25.0–29.99 kg/m2; n = 182), or obese (BMI ≥ 30.0 kg/m2; n = 95). Linear mixed-effects models were applied to study the relationship between BMI class and physical activity and sedentary behavior. At the start of CR, compared with participants with normal weight, participants with obesity made on average 1.11 steps fewer per minute (952 steps/d), spent 2.9% (25 min/d) less time in light physical activity, and spent 3.31% (28 min/d) more time in sedentary behavior. Participants of all BMI classes improved their physical activity and sedentary behavior levels similarly during CR, and these improvements were maintained after completion of CR. Participants with ACS who had obesity started CR with a less favorable physical activity and sedentary behavior profile than that of participants with normal weight. Because all BMI classes showed similar improvement during CR, this deficit was preserved. This study indicates that reconsideration of the CR program in the Netherlands for patients with ACS and obesity is warranted, and development of more inclusive interventions for specific populations is needed. A new program for people with obesity should include added counseling on increasing physical activity and preventing sedentary behavior to facilitate weight loss and reduce mortality risk. People with ACS who have obesity are less active and sit more than individuals with normal weight, both during and after CR. This study suggests that CR needs to be changed to help individuals increase their physical activity to help them lose weight and reduce their risk of death.


  • Open Access

    Impact of frailty on health-related quality of life 1 year after transcatheter aortic valve implantation

    by Jeannette A Goudzwaard, Marjo J A G de Ronde-Tillmans, Fleurance E D van Hoorn, Eline H C Kwekkeboom, Mattie J Lenzen, Maarten P H van Wiechen, Joris F W Ooms, Rutger-Jan Nuis, Nicolas M Van Mieghem, Joost Daemen, et al.

    Transcatheter aortic valve implantation (TAVI) brings symptom relief and improvement in health-related quality of life (HRQoL) in the majority of patients treated for symptomatic, severe aortic stenosis. However, there is a substantial group of patients that do not benefit from TAVI. The aim of this study is to investigate the impact of frailty on HRQoL 1 year after TAVI. The TAVI Care & Cure Program is an ongoing, prospective, observational study including patients referred for TAVI to our institution. A comprehensive geriatric assessment was performed to evaluate existence of frailty using the Erasmus Frailty Score (EFS). HRQoL was assessed using the EQ-5D-5 L at baseline and 1 year after TAVI. 239 patients underwent TAVI and completed HRQoL assessment 1 year after TAVI. Seventy (29.3%) patients were classified as frail (EFS ≥ 3). In non-frail patients, the EQ-5D-5 L index did not change (0.71(± 0.22) to 0.68(± 0.33) points, P = 0.22); in frail patients, the EQ-5D-5 L index decreased from 0.55(±0.26) to 0.44 points (±0.33) (P = 0.022). Frailty was an independent predictor of deteriorated HRQoL 1 year after TAVI (OR 2.24, 95% CI 1.07–4.70, P = 0.003). In frail patients, the absence of peripheral artery disease (OR 0.17, 95% 0.05–0.50, P = 0.001) and renal dysfunction (OR 0.13, 95% CI 0.04–0.41, P = <0.001) at baseline was associated with improved HRQoL 1 year after TAVI. Frailty is associated with deterioration of HRQoL 1 year after TAVI. Notably, HRQoL did improve in frail patients with no peripheral arterial disease or renal impairment at baseline.


  • Expanded clinical use of everolimus eluting bioresorbable vascular scaffolds for treatment of coronary artery disease

    by Roberto Diletti, Yuki Ishibashi, Cordula Felix, Yoshinobu Onuma, Shimpei Nakatani, Nicolas M. van Mieghem, Eveliyn Regar, Marco Valgimigli, Peter P. de Jaegere, Nienke van Ditzhuijzen, et al.

    Limited data are currently available on the performance of everolimus eluting bioresorbable vascular scaffold (BVS) for treatment of complex coronary lesions representative of daily practice. This is a prospective, mono-center, single-arm study, reporting data after BVS implantation in patients presenting with stable, unstable angina, or non-ST segment elevation myocardial infarction caused by de novo stenotic lesions in native coronary arteries. No restrictions were applied to lesion complexity. Procedural results and 12-month clinical outcomes were reported. A total of 180 patients have been evaluated in the present study, with 249 treated coronary lesions. Device Success per lesion was 99.2%. A total of 119 calcified lesions were treated. Comparable results were observed among severe, moderate and noncalcified lesions in term of %diameter stenosis (%DS) (20.3 ± 10.5%, 17.8 ± 7.7%, 16.8 ± 8.6%; P = 0.112) and acute gain (1.36 ± 0.41 mm, 1.48 ± 0.44 mm, 1.56 ± 0.54 mm; P = 0.109). In bifurcations (54 lesions), side-branch ballooning after main vessel treatment was often performed (33.3%) with low rate of side-branch impairment (9.3%). A total of 29 cases with coronary total occlusions were treated. After BVS implantation %DS was not different from other lesion types (17.2 ± 9.4%, vs. 17.7 ± 8.6%; P = 0.780). At one year, all-cause mortality was reported in three cases. The rate of target lesion revascularization and target vessel revascularization was 3.3%. The rate of definite scaffold thrombosis was 2.6%. The implantation of the everolimus eluting bioresorbable vascular scaffold in an expanded range of coronary lesion types and clinical presentations was observed to be feasible with promising angiographic results and mid-term clinical outcomes.

    • 10 April 2015
      • Vol. 56  (2) , 125-35

    Early and late optical coherence tomography findings following everolimus-eluting bioresorbable vascular scaffold implantation in myocardial infarction: a preliminary report.

    by Antonios Karanasos, Takashi Muramatsu, Roberto Diletti, Sjoerd Nauta, Yoshinobu Onuma, Mattie Lenzen, Shimpei Nakatani, Nicolas M Van Mieghem, Carl Schultz, Peter P De Jaegere, et al.

    Although bioresorbable vascular scaffolds (BVS) have been used with promising results in patients with stable and unstable angina, little is known about the acute vascular response following BVS implantation in myocardial infarction. We present angiographic and OCT findings from the first patients undergoing bioresorbable vascular scaffold (BVS) implantation for non-ST-elevation myocardial infarction (NSTEMI) or ST-elevation myocardial infarction (STEMI) in our institution. The first 5 patients with NSTEMI and the first 5 patients with STEMI who underwent BVS implantation in our institution, followed by optical coherence tomography (OCT) imaging of the treated culprit vessel, were included in this series. All patients underwent angiographic analysis pre- and post- BVS implantation, as well as OCT analysis, including qualitative and quantitative assessment. Implantation was successful in all cases, as assessed by angiography and OCT. There were no cases with coronary spasm, distal embolization or no-reflow. No adverse clinical events were recorded in any patient at the 6-month follow up. Specific illustrative cases demonstrating the challenges of BVS implantation in myocardial infarction are presented. BVS implantation can potentially be used in the setting of thrombotic lesions encountered in myocardial infarction; however, the role of this treatment approach warrants systematic evaluation in prospective studies.


  • Tools and Techniques - Statistics: descriptive statistics

    by Sanne Hoeks, Isabella Kardys, Mattie Lenzen, Ron van Domburg, Eric Boersma

    The Official Journal of EuroPCR and the European Association of Percutaneous Cardiovascular Interventions (EAPCI)


    • 4 October 2008
      • Vol. 152  (40) , 2182-5

    [Heart failure in men and women: important differences in the diagnostic workup and treatment].

    by M J Lenzen, A Rosengren, W J M Scholte Op Reimer, F Follath, E Boersma, Simoons M L, J G F Cleland, M Komajda

    To determine gender differences in diagnostic workup and treatment of patients with heart failure. Retrospective. The data of 8914 patients (of whom 4166 women; 47%) with confirmed heart failure, who participated in the Euro Heart Survey on Heart Failure (EHS-HF) were analysed. On average, the women in the study were older than the men (75 versus 68 years) and less often suffered from a coronary heart disease (56 versus 66%). Women were more likely to have hypertension (59 versus 49%), diabetes mellitus (29 versus 26%), or valvular heart disease (42 versus 36%). Fewer women had an ultrasonographic evaluation of ventricular function (59 versus 74%) and, among those investigated, fewer had left ventricular systolic dysfunction (44 versus 72%). These observed results remained stable after adjustment for age and other possible confounding variables. Medication with a documented positive impact on survival, i.e. angiotensin converting enzyme (ACE) inhibitors, beta-blocking drugs and the diuretic spironolactone, was prescribed less often to women than men. Women, however, received symptomatic medication such as other diuretics and digoxin more often than men. Men and women with heart failure differed with respect to a number of relevant clinical characteristics. Clinicians should take good note of this and take measures to prevent differences in patient care.