scholarly journals Magnetic resonance imaging diagnostic potential in “idiopathic” ventricular arrhythmias in children

2021 ◽  
Vol 28 (4) ◽  
pp. 9-14
Author(s):  
K. A. Chueva ◽  
R. B. Tatarskiy ◽  
T. S. Kovalchuk ◽  
T. M. Pervunina ◽  
G. E. Trufanov ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Ventricular Arrhythmias ◽  
Structural Changes ◽  
Pediatric Patients ◽  
Magnetic Resonance Tomography ◽  
Diagnostic Potential ◽  
Structural Abnormalities ◽  
3.0 T ◽  
Group 2

The study aims to assess the role of magnetic resonance tomography (MRI) in identifying the substrate of “idiopathic” ventricular arrhythmias in pediatric patients.Methods. One hundred and seven children with “idiopathic” ventricular arrhythmias were enrolled. All patients underwent MRI on a high-field Magnetom Trio A Tim (Siemens) tomograph with a magnetic field induction of 3.0 T.Results. According to MRI data, dilated ventricles and/or a decreased ejection fraction were found in 55 (51%) patients. Based on structural abnormalities of the myocardium patients were divided into 2 groups: group 1 “normal”, without abnormalities, (69 (64.5%) children); group 2 - “fibrosis”, fibrotic changes were detected on late gadolinium enhancement (38 (35.5%) patients). Significant differences of indexed MR-indicators in these two groups were not found. However, in the “fibrosis” group, biventricular dysfunction occurred significantly more often than in the “normal” group, respectively (14 (37%) and 9 (13%) (p = 0.006)).Conclusion. MRI is important in assessing structural changes in pediatric patients with ventricular arrhythmias, and the combination of MRI results with clinical and electrophysiological data can significantly affect the change in management and treatment strategy in pediatric patients.

Role of Pelvic Magnetic Resonance Imaging for Evaluation of Disease Activity in Pediatric Patients With Perianal Crohnʼs Disease

2012 ◽  
Vol 18 ◽  
pp. S80-S81
Author(s):  
Sakil Kulkarni ◽  
Timothy Yates ◽  
Chantal Lucia-Casadonte ◽  
Roberto Gomara ◽  
Jesse Reeves-Garcia ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Disease Activity ◽  
Pediatric Patients ◽  
Resonance Imaging ◽  
Pelvic Magnetic Resonance Imaging

scholarly journals Mitral Valve Prolapse, Ventricular Arrhythmias, and Sudden Death

Circulation ◽  
2019 ◽  
Vol 140 (11) ◽  
pp. 952-964 ◽  
Author(s):  
Cristina Basso ◽  
Sabino Iliceto ◽  
Gaetano Thiene ◽  
Martina Perazzolo Marra
Keyword(s):  
Cardiac Magnetic Resonance ◽  
Magnetic Resonance ◽  
Mitral Valve ◽  
Sudden Death ◽  
Mitral Valve Prolapse ◽  
Ventricular Arrhythmias ◽  
Left Ventricular ◽  
Premature Ventricular Beats ◽  
Electrophysiologic Studies

Despite a 2% to 3% prevalence of echocardiographically defined mitral valve prolapse (MVP) in the general population, the actual burden, risk stratification, and treatment of the so-called arrhythmic MVP are unknown. The clinical profile is characterized by a patient, usually female, with mostly bileaflet myxomatous disease, mid-systolic click, repolarization abnormalities in the inferior leads, and complex ventricular arrhythmias with polymorphic/right bundle branch block morphology, without significant regurgitation. Among the various pathophysiologic mechanisms of electrical instability, left ventricular fibrosis in the papillary muscles and inferobasal wall, mitral annulus disjunction, and systolic curling have been recently described by pathological and cardiac magnetic resonance studies in sudden death victims and patients with arrhythmic MVP. In addition, premature ventricular beats arising from the Purkinje tissue as ventricular fibrillation triggers have been documented by electrophysiologic studies in MVP patients with aborted sudden death. The genesis of malignant ventricular arrhythmias in MVP probably recognizes the combination of the substrate (regional myocardial hypertrophy and fibrosis, Purkinje fibers) and the trigger (mechanical stretch) eliciting premature ventricular beats because of a primary morphofunctional abnormality of the mitral valve annulus. The main clinical challenge is how to identify patients with arrhythmic MVP (which imaging technique and in which patient) and how to treat them to prevent sudden death. Thus, there is a necessity for prospective multicenter studies focusing on the prognostic role of cardiac magnetic resonance and electrophysiologic studies and on the therapeutic efficacy of targeted catheter ablation and mitral valve surgery in reducing the risk of life-threatening arrhythmias, as well as the role of implantable cardioverter defibrillators for primary prevention.

scholarly journals RESULTS OF NON-INVASIVE ACTIVATION MAPPING OF THE HEART IN “IDIOPATHIC” VENTRICULAR ARRHYTHMIAS IN COMPARISON WITH STRUCTURAL CHARACTERISTICS OF MYOCARDIUM BY MAGNETIC RESONANCE IMAGING

2018 ◽  
pp. 32-40
Author(s):  
N. A. Mironova ◽  
L. H. Yeghiazaryan ◽  
О. P. Aparina ◽  
T. A. Malkina ◽  
O. V. Stukalova ◽  
...  
Keyword(s):  
Ventricular Tachycardia ◽  
Magnetic Resonance ◽  
Ventricular Arrhythmias ◽  
Structural Characteristics ◽  
Magnetic Resonance Tomography ◽  
Late Enhancement ◽  
Morphological Type ◽  
Sustained Ventricular Tachycardia ◽  
Ventricular Ectopic Activity ◽  
Non Invasive

Aim.To compare the results of non-invasive activational mapping in patients with “idiopathic” ventricular arrhythmias (IVA) with the data on myocardial structure obtained by late enhancement magnetic resonance tomography (MRI).Material and methods.Twenty eight IVA patients, mean age 37 y. o. [26; 45], with ventricular arrhythmias of the heart (VA) of 2nd or higher grade by Lown, and 5 healthy volunteers (HV), mean age 29 [29; 30], underwent surface epiand endocardial non-invasive mapping (SEENIM) of the heart with the system for noninvasive electrophysiological investigation of the heart “Amicard 01C” with the analysis of duration of the activation-recovery interval (ARI) of the ventricles, and high resolution MRI (voxel 1,25x1,25x2,5mm) with delayed contrasting.Results.The number of VA in IVA group was 20196 [11479; 29834] for 24 hours. In 11 patients there were episodes of non-sustained ventricular tachycardia (VT). By SEENIM, predominating morphological type of ventricular ectopic activity in 22 patients sourced from the right ventricle myocardium (RV), of those in 20 from outflow tract of the LV (OTLV). There was significantly prolonged ARI in OTLV patients with IVA comparing to HV (p<0,05). In IVA and non-sustained ventricular tachycardia patients, by contrast MRI of the heart, in LV myocardium there were small foci of contrast retention found. There was no correlation of the areas of contrast retention and topography of VA sources.Conclusion.In most of IVA patients the source of VA was outflowing tract of the RV. The revealed prolongation of the ARI of this area in IVA patients can be an important factor of IVA onset. Small foci of LV fibrosis, found in late enhancement MRI of the heart and episodes of so called idiopathic VT, might be the earliest presentation of the “tachycardiopathy” at the step of pathology development when there are no signs of LV dilation.

scholarly journals THE ROLE OF VASCULAR REMODELING IN THE FORMATION OF STRUCTURAL PHENOTYPES OF OSTEOARTHRITIS

2018 ◽  
Vol 25 (3) ◽  
pp. 61-67
Author(s):  
M. A. KABALYK ◽  
V. A. NEVZOROVA
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Knee Joint ◽  
Vascular Remodeling ◽  
Structural Changes ◽  
Vascular Wall ◽  
External Diameter ◽  
Resonance Imaging ◽  
Structural Progression

Aim. Evaluation of the role of vascular remodeling in the formation of structural phenotypes of osteoarthritis (OA).Materials and methods. 62 patients with OA aged 65,9±8,8 years and 18 volunteers without clinical and roentgenologic signs of OA aged 60,7±7,9 years were examined. All patients underwent magnetic resonance imaging of knee joints. To analyze the structural changes in the tissues of the knee joint, the WORMS protocol was used for magnetic resonance imaging. The thickness of the vascular wall, the external diameter, the vascular index (VI) were measured – the ratio of the diameter of the lumen of the vessel to the thickness of the popliteal artery (PA) wall, the branch of the upper lateral artery (LA), the medial artery of the knee (MA).Results. The analysis of the parameters of the arteries of the knee joint showed that with a subchondral OA phenotype, the thickness of the PA wall is statistically significantly larger than the cartilage phenotype, and the vascular index of the PA is significantly higher in the group of the cartilaginous phenotype. The upper LA wall was significantly thicker in the subchondral OA phenotype. VI of the upper LA was significantly lower in patients with a subchondral phenotype compared with the cartilaginous phenotype. The thickness of the MA wall was also larger with a bone phenotype, and VI with a cartilaginous phenotype.Conclusion. The results of the study showed the relationship between vascular remodeling and structural progression of OA. Changes in the vascular wall adversely affect all joint tissues, leading to their remodeling. It was established that the degree of vascular remodeling determines the formation of structural OA phenotypes. Severe vascular changes are associated with the subchondral OA phenotype.

Partial Anomalous Pulmonary Venous Drainage in Young Pediatric Patients: The Role of Magnetic Resonance Imaging

2009 ◽  
Vol 30 (4) ◽  
pp. 458-464 ◽  
Author(s):  
Eugénie Marie-Christine Riesenkampff ◽  
Boris Schmitt ◽  
Bernhard Schnackenburg ◽  
Michael Huebler ◽  
Vladimir Alexi-Meskishvili ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Pediatric Patients ◽  
Venous Drainage ◽  
Resonance Imaging ◽  
Anomalous Pulmonary Venous Drainage

scholarly journals Methods of diagnosis of acute epiphyseal osteomyelitis in children

2017 ◽  
Vol 5 (2) ◽  
pp. 59-64
Author(s):  
Dmitry S. Labuzov ◽  
Anna B. Salopenkova ◽  
Yaroslav N. Proshchenko
Keyword(s):  
Magnetic Resonance ◽  
Early Diagnosis ◽  
Pediatric Patients ◽  
Low Cost ◽  
Magnetic Resonance Tomography ◽  
Diagnostic Methods ◽  
Widespread Availability ◽  
Bone Scans ◽  
The Moment ◽  
Reliable Methods

Summary. The article presents the analysis of different method for diagnosis of epiphyseal osteomyelitis, including radiography, ultrasonography, computed tomography, magnetic resonance tomography, and radioisotope bone scans. We address the advantages, disadvantages, and possibilities of each method from the standpoint of early diagnosis of osteomyelitis in children. Based upon the literature, the most effective and reliable methods for early diagnosis of epiphyseal osteomyelitis in pediatric patients are magnetic resonance and ultrasound. The present diagnostic methods involve no radiation exposure. Using an ultrasonic diagnostic method does not require complete immobility of the patient, can be used from the moment of birth, has widespread availability, and has a relative low cost to allow its use in any medical institution.

Sign in / Sign up

Export Citation Format

Share Document