Publications
Below you can find a list of our published research.
Below you can find a list of our published research.
111 results
Netherlands heart journal : monthly journal of the Netherlands Society of Cardiology and the Netherlands Heart Foundation, Volume 12, Issue 5, 1 1 2004, Pages 255-256 Recommendations for pacemaker implantation for the treatment of atrial tachyarrhythmias and resynchronisation therapy for heart failure. Wijffels MC, Bootsma M, van Erven L, Zeppenfeld K, Schalij MJ, van Hemel NM
Cited 14 times since 2004 (0.7 per year) source: EuropePMC
Heart rhythm, Volume 1, Issue 1, 1 1 2004, Pages 51-57 Standardized screening and treatment of patients with life-threatening arrhythmias: the Leiden out-of-hospital cardiac arrest evaluation study. van der Burg AE, Bax JJ, Boersma E, van Erven L, Bootsma M, van der Wall EE, Schalij MJ
Objectives: The aim of this study was to evaluate the effect of a systematic screening/treatment protocol on outcome in patients after aborted sudden death. Background: Patients after aborted sudden death are at high risk for recurrent events. In this regard, systematic screening is mandatory to reveal the underlying etiology, to detect and subsequently treat reversible causes, and to establish patient-tailored antiarrhythmic treatment. Methods: A total of 417 consecutive patients after aborted... Abstract
Cited 67 times since 2004 (3.3 per year) source: EuropePMC
The American journal of cardiology, Volume 93, Issue 7, 1 1 2004, Pages 860-863 Comparison of benefits from cardiac resynchronization therapy in patients with ischemic cardiomyopathy versus idiopathic dilated cardiomyopathy. Molhoek SG, Bax JJ, van Erven L, Bootsma M, Boersma E, Steendijk P, van der Wall EE, Schalij MJ
Cardiac resynchronization therapy (CRT) is a recently introduced therapeutic option for patients with severe heart failure and intraventricular conduction disturbances. However, it is estimated that 20% to 30% of patients may not respond to CRT. Patients with ischemic cardiomyopathy (IC) may respond less favorably to CRT compared with patients with idiopathic dilated cardiomyopathy (IDC). Accordingly, the beneficial effects of CRT were evaluated in 2 subsets of patients (IC and IDC). Seventy-fou... Abstract
Cited 114 times since 2004 (5.7 per year) source: EuropePMC
Pacing and clinical electrophysiology : PACE, Volume 27, Issue 3, 1 1 2004, Pages 308-313 QRS duration and shortening to predict clinical response to cardiac resynchronization therapy in patients with end-stage heart failure. Molhoek SG, VAN Erven L, Bootsma M, Steendijk P, Van Der Wall EE, Schalij MJ
Despite current selection criteria (NYHA Class III-IV, LVEF < 35%, QRS > 120 ms with LBBB), 30% of patients do not benefit from cardiac resynchronization therapy (CRT). The use of QRS duration as selection criteria for CRT has not been evaluated systematically yet. Accordingly, the value of QRS duration at baseline (and reduction in QRS duration after CRT) to predict responders was studied. Patients were evaluated at baseline and after 6 months of CRT for NYHA Class, quality of life score,... Abstract
Cited 20 times since 2004 (1 per year) source: EuropePMC
Heart (British Cardiac Society), Volume 90, Issue 1, 1 1 2004, Pages 97-98 Atrial and brain natriuretic peptides as markers of response to resynchronisation therapy. Molhoek SG, Bax JJ, van Erven L, Bootsma M, Steendijk P, Lentjes E, Boersma E, van der Laarse A, van der Wall EE, Schalij MJ
Cited 5 times since 2003 (0.2 per year) source: EuropePMC
Lancet (London, England), Volume 362, Issue 9401, 1 1 2003, Pages 2118-9; author reply 2119-20 Selective decontamination of digestive tract in intensive care. Bonten MJ, Kluytmans J, de Smet AM, Bootsma M, Hoes A
Cited 7 times since 2003 (0.3 per year) source: EuropePMC
Netherlands heart journal : monthly journal of the Netherlands Society of Cardiology and the Netherlands Heart Foundation, Volume 11, Issue 6, 1 1 2003, Pages 250-259 Heart rate variability and sympathovagal balance: pharmacological validation. Bootsma M, Swenne CA, Janssen MJ, Cats VM, Schalij MJ
Rationale: We validated heart rate (HR) and six time and six frequency domain measures of heart rate variability (HRV) as estimators of autonomic outflow in 44 young healthy male subjects. Gold standards for autonomic outflow were the Rosenblueth-Simeone factors m (sympathetic tone) and n (vagal tone), and the sympathovagal balance m·n, determined by two-stage complete autonomic blockade. Methods: Rank correlations were computed between HR and the HRV measures obtained before autonomic blockade,... Abstract
Cited 46 times since 2003 (2.2 per year) source: EuropePMC
The American journal of cardiology, Volume 91, Issue 7, 1 1 2003, Pages 785-789 Impact of percutaneous coronary intervention or coronary artery bypass grafting on outcome after nonfatal cardiac arrest outside the hospital. Borger van der Burg AE, Bax JJ, Boersma E, Bootsma M, van Erven L, van der Wall EE, Schalij MJ
Survivors of cardiac arrest due to ventricular arrhythmias are at risk for recurrent events. The role of revascularization in secondary prevention for survivors of cardiac arrest has been addressed in various studies with conflicting results. A total of 142 survivors of cardiac arrest with coronary artery disease were evaluated according to a standardized protocol, including 2-dimensional echocardiography, myocardial perfusion scintigraphy, coronary angiography, and electrophysiologic testing. R... Abstract
Cited 1 times since 2003 (0 per year) source: EuropePMC
Nederlands tijdschrift voor geneeskunde, Volume 147, Issue 15, 1 1 2003, Pages 708-714 [Risk of ventricular fibrillation in patients with Wolff-Parkinson White syndrome]. Bootsma M, van der Wall EE, Schalij MJ
A 16-year-old boy suddenly fell off his stool, a 26-year-old man had persistent palpitations and a 29-year-old man was reanimated without an incriminating anamnesis. The diagnosis 'Wolff-Parkinson-White(WPW)-syndrome' was made in all three cases. The boy died as a result of postanoxic neurological injury; in the two men, further cardiac rhythm disturbances were prevented by interrupting the accessory atrioventricular connection via radiofrequency catheter ablation. In ECG databases, a... Abstract
Cited 1 times since 2003 (0 per year) source: EuropePMC
Netherlands heart journal : monthly journal of the Netherlands Society of Cardiology and the Netherlands Heart Foundation, Volume 11, Issue 4, 1 1 2003, Pages 154-158 The impact of an implantable cardioverter defibrillator: the Leiden follow-up study of ICD patients and their partners. de Groot NM, Bootsma M, van der Wall EE, Schalij MJ
Objectives: The goal of this study was to evaluate 1) the presence of psychosocial problems in both ICD patients and their partners, and 2) the relation between psychosocial problems and various clinical variables. Methods: Questionnaires were sent to 219 ICD patients and their partners. Results: Sixty-eight percent of the ICD patients, 122 (81%) male, aged 59±12 years, and 62% of their partners, 28 (21%) male, aged 58±11 years, returned the questionnaires. Anxiety, depression or nervousness was... Abstract
Cited 10 times since 2003 (0.5 per year) source: EuropePMC
The American journal of cardiology, Volume 91, Issue 3, 1 1 2003, Pages 365-367 Usefulness of magnetic resonance imaging in diagnosis of arrhythmogenic right ventricular dysplasia and agreement with electrocardiographic criteria. Kayser HW, de Roos A, Schalij MJ, Bootsma M, Wellens HJ, Van der Wall EE
Netherlands heart journal : monthly journal of the Netherlands Society of Cardiology and the Netherlands Heart Foundation, Volume 11, Issue 1, 1 1 2003, Pages 15-27 Arrhythmogenic right ventricular dysplasia/cardiomyopathy: new avenues for diagnosis and treatment. van der Wall EE, Bootsma M, Wellens HJ, Bax JJ, de Roos A, Schalij MJ
Arrhythmogenic right ventricular dysplasia/cardiomyopathy (ARVD/C) is a heart muscle disorder of unknown course that is characterised pathologically by fatty or fibrofatty replacement of the right ventricular myocardium and electrical instability. Clinical manifestations include structural and functional malformations of the right ventricle, electrocardiographic abnormalities, and presentation of ventricular tachycardias with left bundle branch pattern or sudden death. The disease is often famil... Abstract
Cited 42 times since 2002 (1.9 per year) source: EuropePMC
The American journal of cardiology, Volume 90, Issue 4, 1 1 2002, Pages 379-383 Effectiveness of resynchronization therapy in patients with end-stage heart failure. Molhoek SG, Bax JJ, van Erven L, Bootsma M, Boersma E, Steendijk P, van der Wall EE, Schalij MJ
Biventricular pacing has been introduced to treat patients with end-stage heart failure, and short-term results of this technique are promising. Because data on longer follow-up are limited to 3-month follow-up, the sustained effect of biventricular pacing is unclear and long-term survival is unknown. Forty patients with end-stage heart failure in New York Heart Association (NYHA) functional class III or IV with left ventricular (LV) ejection fraction (EF) 120 ms, and left bundle branch block mo... Abstract
Cited 52 times since 2002 (2.4 per year) source: EuropePMC
Journal of cardiovascular electrophysiology, Volume 13, Issue 5, 1 1 2002, Pages 417-423 Long-term follow-up after radiofrequency catheter ablation of ventricular tachycardia: a successful approach? Borger van der Burg AE, de Groot NM, van Erven L, Bootsma M, van der Wall EE, Schalij MJ
Introduction: Radiofrequency ablation (RFCA) of ventricular tachycardia (VT) is a potential curative treatment modality. We evaluated the results of RFCA in patients with VT. Methods and results: One hundred fifty-one consecutive patients (122 men and 29 women; age 57 +/- 16 years) with drug-refractory VT were treated. Underlying heart disease was ischemic heart disease in 89 (59%), arrhythmogenic right ventricular cardiomyopathy (ARVC) in 32 (21%), and idiopathic VT in 30 (20%; left ventricle i... Abstract
Cited 10 times since 2002 (0.4 per year) source: EuropePMC
Journal of cardiovascular magnetic resonance : official journal of the Society for Cardiovascular Magnetic Resonance, Volume 4, Issue 3, 1 1 2002, Pages 353-357 Noninvasive and invasive evaluation of noncompaction cardiomyopathy. Bax JJ, Atsma DE, Lamb HJ, Rebergen SA, Bootsma M, Voogd PJ, Somer S, Schalij MJ, de Roos A, van der Wall EE
Noncompaction cardiomyopathy is a recently described rare congenital cardiomyopathy; patients can be asymptomatic or develop diastolic and/or systolic left ventricular dysfunction with heart failure, systemic emboli or ventricular arrhythmias. Long-term prognosis is poor. Currently, diagnosis is based on findings on 2D echocardiography; in the current case report we demonstrate the use of MRI to diagnose noncompaction cardiomyopathy. Abstract
Cited 22 times since 2001 (1 per year) source: EuropePMC
Pacing and clinical electrophysiology : PACE, Volume 24, Issue 9 Pt 1, 1 1 2001, Pages 1334-1342 Three-dimensional distribution of bipolar atrial electrogram voltages in patients with congenital heart disease. De Groot NM, Kuijper AF, Blom NA, Bootsma M, Schalij MJ
Voltage differences might be used to distinguish normal atrial tissue from abnormal atrial tissue. This study was aimed at identifying lowest voltage areas in patients with atrial tachycardia after surgical correction of congenital heart disease and to evaluate if identification of these areas in diseased hearts facilitates selection of critical conduction pathways in reentrant circuits as target sites for catheter ablation. Ten patients (four men, age 39 +/- 15 years) with normal sized atria an... Abstract
Cited 37 times since 2000 (1.6 per year) source: EuropePMC
Journal of cardiovascular electrophysiology, Volume 11, Issue 11, 1 1 2000, Pages 1183-1192 Three-dimensional catheter positioning during radiofrequency ablation in patients: first application of a real-time position management system. de Groot NM, Bootsma M, van der Velde ET, Schalij MJ
Introduction: Precise localization of target sites for radiofrequency catheter ablation (RFCA) of arrhythmias is hampered by the relative inaccuracy of X-ray localization procedures. This study evaluated the efficacy of a three-dimensional (3D) real-time position management system in guiding RFCA procedures in patients. Methods and results: Patients (n = 30, age 59+/-20 years) referred for ablation of either atrial flutter (n = 10), ventricular tachycardia (n = 15), or accessory pathways (n = 5)... Abstract
Echocardiography (Mount Kisco, N.Y.), Volume 17, Issue 7, 1 1 2000, Pages 625-629 Echocardiographic imaging of stentless aortic valve prostheses. Baur LH, Peels K, Braun J, Kappetein AP, Bootsma M, Van Der Ploeg A, Sieders A, Hazekamp M, Van Der Wall EE, Huysmans HA
Unlabelled: Homografts and stentless xenografts are increasingly used in aortic valve surgery. Echocardiography technicians and cardiologists have to know what they will find when performing an echo-Doppler examination in patients who received a stentless valve. We therefore evaluated echocardiographic images of 74 patients who received a Freestyle stentless bioprosthesis with three techniques and a follow-up of 2 years in two high-volume hospitals. Of the patients studied, 81% were operated usi... Abstract
Cited 45 times since 2000 (1.9 per year) source: EuropePMC
Herz, Volume 25, Issue 4, 1 1 2000, Pages 356-364 Arrhythmogenic right ventricular dysplasia: MRI findings. van der Wall EE, Kayser HW, Bootsma MM, de Roos A, Schalij MJ
Arrhythmogenic right ventricular dysplasia (ARVD) is a heart muscle disorder of unknown cause that is characterized pathologically by fibrofatty replacement of the right ventricular myocardium. Clinical manifestations include structural and functional malformations of the right ventricle, electrocardiographic abnormalities, and presentation with ventricular tachycardias with left bundle branch pattern or sudden death. The disease is often familial with an autosomal inheritance. In addition to ri... Abstract
Cited 6 times since 2000 (0.2 per year) source: EuropePMC
International journal of cardiac imaging, Volume 16, Issue 1, 1 1 2000, Pages 35-41 Imaging of an aneurysm of the sinus of Valsalva with transesophageal echocardiography, contrast angiography and MRI. Baur LH, Vliegen HW, van der Wall EE, Hazekamp M, Bootsma M, de Roos A, Bruschke AV
A sinus of Valsalva aneurysm is an uncommon congenital defect, which requires appropriate diagnosis with either echocardiography, magnetic resonance imaging or contrast angiography. Treatment consists of aortic valve repair. We describe a young woman with an aneurysm of the non-coronary sinus of Valsalva, an atrial septal defect and pulmonary insufficiency. The different imaging techniques and possibilities of surgical correction are described. Abstract