scholarly journals Changes of electrophysiological parameters in patients with atrial flutter

Medicina ◽  
2007 ◽  
Vol 43 (8) ◽  
pp. 614 ◽  
Author(s):  
Diana Žaliaduonytė-Pekšienė ◽  
Tomas Kazakevičius ◽  
Vytautas Zabiela ◽  
Vytautas Šileikis ◽  
Remigijus Vaičiulis ◽  
...  
Keyword(s):  
Response Time ◽  
Atrial Flutter ◽  
Right Atrium ◽  
Propagation Speed ◽  
Control Group ◽  
Type I ◽  
Stimulus Response ◽  
Refractory Periods ◽  
Impulse Propagation ◽  
The Right

Objectives. The aim of the study was to study some anatomic and electrophysiological features of the right atrium, related to the presence of atrial flutter. Materials and methods. A total 23 patients with type I atrial flutter and 22 patients without atrial flutter were studied. Right atrium size was assessed using echocardiography before intracardiac examination and radiofrequency ablation. Results. Effective refractory periods of coronary sinus, high right atrium, low right atrium were different comparing with the control group (P<0.05). A stimulus–response time between high right atrium and low right atrium positions in anterograde and retrograde ways, an impulse propagation speed along the lateral wall of the right atrium were statistically different comparing both groups (P<0.05). There was a significant correlation among effective refractory periods measured in different sites of the right atrium (r²=0.64, 0.44, 0.44, respectively). All measured effective refractory periods also correlated with stimulus–response time in anterograde way (P<0.05) and impulse propagation speed (P<0.05). Right atrium dimensions were significantly larger in atrial flutter group. There was no correlation between the right atrium dimensions and measured electrophysiological parameters in both groups.Conclusions. The presence of atrial flutter associates with diffuse alterations of the right atrium, but not the focal or single changes of refractoriness.

scholarly journals P649 Before and after: sinus venosus atrial septal defect

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
I Marco Clement ◽  
R Eiros ◽  
R Dalmau ◽  
T Lopez ◽  
G Guzman ◽  
...  
Keyword(s):  
Atrial Septal Defect ◽  
Left Atrium ◽  
Atrial Flutter ◽  
Superior Vena Cava ◽  
Right Atrium ◽  
Septal Defect ◽  
Superior Vena ◽  
Pulmonary Veins ◽  
Vena Cava ◽  
The Right

Abstract Introduction The diagnosis of sinus venosus atrial septal defect (SVASD) is complex and requires special imaging. Surgery is the conventional treatment; however, transcatheter repair may become an attractive option. Case report A 60 year-old woman was admitted to the cardiology department with several episodes of paroxysmal atrial flutter, atrial fibrillation and atrioventricular nodal reentrant tachycardia. She reported a 10-year history of occasional palpitations which had not been studied. A transthoracic echocardiography revealed severe right ventricle dilatation and moderate dysfunction. Right volume overload appeared to be secondary to a superior SVASD with partial anomalous pulmonary venous drainage. A transesophageal echocardiography confirmed the diagnosis revealing a large SVASD of 16x12 mm (Figure A) with left-right shunt (Qp/Qs 2,2) and two right pulmonary veins draining into the right superior vena cava. Additionally, it demonstrated coronary sinus dilatation secondary to persistent left superior vena cava. CMR and cardiac CT showed right superior and middle pulmonary veins draining into the right superior vena cava 18 mm above the septal defect (Figures B and C). After discussion in clinical session, a percutaneous approach was planned to correct the septal defect and anomalous pulmonary drainage. For this purpose, anatomical data obtained from CMR and CT was needed to plan the procedure. During the intervention two stents graft were deployed in the right superior vena cava. The distal stent was flared at the septal defect level so as to occlude it while redirecting the anomalous pulmonary venous flow to the left atrium (Figure D). Control CT confirmed the complete occlusion of the SVASD without residual communication from pulmonary veins to the right superior vena cava or the right atrium (Figure E). Anomalous right superior and middle pulmonary veins drained into the left atrium below the stents. Transthoracic echocardiographies showed progressive reduction of right atrium and ventricle dilatation. The patient also underwent successful ablation of atrial flutter and intranodal tachycardia. She is currently asymptomatic, without dyspnea or arrhythmic recurrences. Conclusions In this case, multimodality imaging played a key role in every stage of the clinical process. First, it provided the diagnosis and enabled an accurate understanding of the patient’s anatomy, particularly of the anomalous pulmonary venous connections. Secondly, it allowed a transcatheter approach by supplying essential information to guide the procedure. Finally, it assessed the effectiveness of the intervention and the improvement in cardiac hemodynamics during follow-up. Abstract P649 Figure.

scholarly journals P189 Duplication of the tricuspid valve (DOTV): case report of a rare congenital anomaly

2020 ◽  
Vol 21 (Supplement_1) ◽  
Author(s):  
S Moscatelli ◽  
G Trocchio ◽  
N Stagnaro ◽  
A Siboldi ◽  
M Derchi ◽  
...  
Keyword(s):  
Pulmonary Artery ◽  
Atrial Flutter ◽  
Tricuspid Valve ◽  
Tricuspid Regurgitation ◽  
Right Atrium ◽  
Rare Condition ◽  
Systolic Pulmonary Artery Pressure ◽  
Severe Tricuspid Regurgitation ◽  
One Year ◽  
The Right

Abstract Introduction Tricuspid valve duplication is an extremely rare condition and in most of the cases it is associated with other congenital cardiac malformations. Because of its rarity, the clinical presentation and the management are not defined yet. Clinical Case We report the case of an 18 y/o caucasian male, who was admitted to our Hospital in February 2018 for rapid atrial flutter not responsive to medical therapy (propanolol and digossin). He had a pre-natal diagnose of ventricular septum defect (VSD) and tricuspid straddling. At 1 year of age he underwent pulmonary artery bandage and one year later VSD closure was performed. Blood test showed sub-clinic hypothyroidism, probably related to previous amiodaron therapy. A transthoracic echocardiogram was obtained. The right atrium (RA) was severely dilated and the atrial septum dislocated towards left ventricle (LV); two right atrioventricular valves (tricuspid valves) were detected: the ‘true’ tricuspid opening was inside the right ventricle, and an ‘accessory‘ opening was located inside the LV and severely regurgitant into the RA; the mitral valve was morphologically and functionally normal; both ventricles were dilated with preserved systolic function; systolic pulmonary artery pressure was not detectable. A Cardiac Magnetic Resonance clearly delineated the anomaly. Atrial flutter radio frequency transcatheter ablation was succesfully performed before corrective surgery. The regurgitant accessory tricuspid orifice was closed with an heterologous pericardial patch and a right reduction atrioplasty was also done. The post-operative course was uneventful and only a mild paraseptal tricuspid jet with LV to RA shunt was present at post op echocardiography. After one year follow-up the patient remained asymptomatic, without arrhythmia recurrence. Conclusion DOTV is an extremely rare condition that could be responsible of severe tricuspid regurgitation. At the moment, there are not sufficient data to establish the correct timing for surgical intervention. In our case, the presence of severe tricuspid regurgitation, right atrium dilatation, biventricular overload and atrial flutter guided the clinical management and suggested surgical correction. Abstract P189 Figure.

scholarly journals Early alterations in myocardia and vessels of the diabetic rat heart: an FTIR microspectroscopic study

2006 ◽  
Vol 397 (3) ◽  
pp. 427-436 ◽  
Author(s):  
Neslihan Toyran ◽  
Peter Lasch ◽  
Dieter Naumann ◽  
Belma Turan ◽  
Feride Severcan
Keyword(s):  
Left Ventricle ◽  
Right Ventricle ◽  
Rat Heart ◽  
Molecular Level ◽  
Diabetic Group ◽  
Control Group ◽  
Type I ◽  
Short Term ◽  
The Right ◽  
Left Ventricle Myocardium

Diabetes mellitus is associated with a high incidence and poor prognosis of cardiovascular disease. The aim of the present study was to examine the effect of relatively short-term (5 weeks) Type I diabetes on the left ventricle, the right ventricle and the vessel (vein) on the left ventricle of the myocardium at molecular level by FTIR (Fourier-transform infrared) microspectroscopy. The rats were categorized into two groups: control group (for the left ventricle myocardium, n=8; for the right ventricle myocardium, n=9; for the vein, n=9) and streptozotocin-induced diabetic group (for the left ventricle myocardium, n=7; for the right ventricle myocardium, n=9; for the vein, n=8). Two adjacent cross-sections of 9 μm thickness were taken from the ventricles of the hearts in two groups of rats by using a cryotome. The first sections were used for FTIR microspectroscopy measurements. The second serial sections were stained by haematoxylin/eosin for comparative purposes. Diabetes caused an increase in the content of lipids, an alteration in protein profile with a decrease in α-helix and an increase in β-sheet structure as well as an increase in glycogen and glycolipid contents in both ventricles and the vein. Additionally, the collagen content was found to be increased in the vein of the diabetic group. The present study demonstrated that diabetes-induced alterations in the rat heart can be detected by correlating the IR spectral changes with biochemical profiles in detail. The present study for the first time demonstrated the diabetes-induced alterations at molecular level in both ventricle myocardia and the veins in relatively short-term diabetes.

scholarly journals RIVOROXABAN IN PATIENTS WITH TYPE I ATRIAL FLUTTER: EFFECTIVENESS, SAFETY AND COMPLIANCE

2018 ◽  
Vol 7 (3) ◽  
pp. 44-55
Author(s):  
A. V. Fedoseenko ◽  
S. A. Zenin ◽  
O. V. Kononenko ◽  
O. V. Pyataeva ◽  
Y. E. Voskoboyniokov
Keyword(s):  
Atrial Fibrillation ◽  
Risk Assessment ◽  
Atrial Flutter ◽  
Bleeding Risk ◽  
Control Group ◽  
Type I ◽  
Adherence To Treatment ◽  
High Adherence ◽  
Potential Benefits ◽  
Atrial Fibrillation Group

Aim. To assess effectiveness, safety and adherence to treatment of patients with type I atrial flutter who were previously excluded from the clinical trials evaluating the potential benefits of rivoroxaban for thromboembolism prevention.Methods. 27 medical records of patients with type I atrial flutter were retrospectively reviewed and assigned to the study group. The control group consisted of 100 patients with atrial fibrillation. Both groups received rivoroxaban. All patients underwent thromboembolism risk assessment with the CHA2DS2-VACs score, bleeding risk assessment with HAS-BLED score. Data were collected by telephone.Results. No thromboembolic events were registered in the atrial flutter group, whereas one case of ischemic stroke was in the atrial fibrillation group. There were no major bleedings in both groups. Four patients with atrial flutter and 2 patients with atrial fibrillation had hemorrhages. Patients’ adherence to rivoroxaban was 75–80%.Conclusion. Rivoroxaban therapy was found to be effective and safe in patients with type I atrial flutter including those who underwent cardioversion. High adherence to rivoroxaban therapy was demonstrated.

scholarly journals Atrial function after treatment of atrial septal defects in children under 5 years

2020 ◽  
Author(s):  
Eun-Young Choi ◽  
Eun Sun Kim ◽  
Jung-Yoon Kim ◽  
Su-Jin Park ◽  
Ja-kyoung Yoon ◽  
...  
Keyword(s):  
Right Atrium ◽  
Global Longitudinal Strain ◽  
Atrial Function ◽  
Right Atrial ◽  
Control Group ◽  
Closure Device ◽  
Right Atrial Function ◽  
One Year ◽  
Asd Closure ◽  
The Right

Abstract BackgroundRecently, the patient’s age of atrial septal defect (ASD) treatment has been gradually decreasing. However, the most appropriate age and treatment method remain controversial. We hypothesized that treatment of ASDs in patients under 5 years would be able to adequately normalize bi-atrial function over one year after treatment. The purpose of this study is to confirm the normalization of hypothesized atrial function.MethodsData of fifteen patients who underwent surgical ASD closure under 5 years of age (Operation group), 15 patients who underwent percutaneous ASD closure (Device group), and 15 age- and gender-matched normal control patients (Control group) were extracted from our echocardiographic data. Conventional 2D images and 2D speckle tracking method were used to evaluate bi-atrial function.ResultsLeft atrial function, εS, εE, and εA showed no significant differences in the three groups. Indicators representing the right atrial function varied with the three groups. However, there were no significant differences in the global longitudinal strain of the right atrium between the Operation and Device groups.ConclusionsAfter ASD treatment, right atrial function recovery is less than that of the left atrium. The function of the right atrium is not normalized after more than one year of treatment for ASD in patients under 5 years. After ASD treatment, further follow-up of the bi-atrial function is necessary.

Electrophysiologic Characteristics and Ablation of an Atypical Atrial Flutter in the Right Atrium

2000 ◽  
Vol 11 (3) ◽  
pp. 334-338 ◽  
Author(s):  
KUAN-CHENG CHANG ◽  
YU-CHIN LIN ◽  
HSIANG-TAI CHOU ◽  
JUI-SUNG HUNG
Keyword(s):  
Atrial Flutter ◽  
Right Atrium ◽  
The Right

Stimulation of the dorsolateral-prefrontal cortex improves working memory and planning

2021 ◽  
Vol 25 (1) ◽  
pp. 1-17
Author(s):  
Puladi Farzaneh ◽  
Bagheri Masood ◽  
Ghasem Askarizadeh ◽  
Afsaneh Moradi
Keyword(s):  
Working Memory ◽  
Prefrontal Cortex ◽  
Response Time ◽  
Dorsolateral Prefrontal Cortex ◽  
Control Group ◽  
Response Accuracy ◽  
Significant Difference ◽  
Dorsolateral Prefrontal ◽  
The Right ◽  
And Control

The present study aimed to investigate whether working memory (WM) and planning performances can be enhanced using transcranial direct current stimulation (tDCS). A total of 30 healthy individuals were randomly assigned to two groups: active (A)-tDCS and control (S)-tDCS. Anodal stimulation over the left dorsolateral prefrontal cortex (DLPFC) (F3) and cathodal stimulation over the right orbitofrontal cortex (OFC) (FP2) were further implemented at 2 mA in the A-tDCS group, while there was no intervention in the control group. The tools used were software versions of the three-level n-back task and Tower of London (TOL) task, and for each task we measured participants’ response accuracy and response time. The results showed a significant difference between the groups in both cognitive functions, suggesting that tDCS can improve response accuracy in memory and problem-solving ability, but it is less effective in terms of improving response time on planning. Overall, findings suggest that tDCS can enhance WM and planning performances.

scholarly journals A Novel Wire Is Effective for Echo-Guiding Percutaneous Atrial Septal Defect Closure: A Preclinical Study

2018 ◽  
Vol 2018 ◽  
pp. 1-4 ◽  
Author(s):  
Yao Liu ◽  
Gai-Li Guo ◽  
Feng-Wen Zhang ◽  
Bin Wen ◽  
Wen-Bin Ou-Yang ◽  
...  
Keyword(s):  
Atrial Septal Defect ◽  
Right Atrium ◽  
Septal Defect ◽  
Guide Wire ◽  
Control Group ◽  
Study Group ◽  
Atrial Septal Defect Closure ◽  
Sheep Model ◽  
Asd Closure ◽  
The Right

Objective. To assess the effectiveness of a novel ultrasound wire for echo-guiding percutaneous atrial septal defect (ASD) closure in a sheep model. Methods. After right lateral thoracotomy, ASDs were created in 20 sheep by transseptal needle puncture followed by balloon dilatation. Animals were evenly randomized into 2 groups to undergo ASD closure using echography as the only imaging tool with either COOK wire (control group) or new ultrasound wire (study group). The total procedural time, passing time (time needed for the guide wire to enter the left atrium), frequency of delivery sheath dropping into the right atrium, frequency of arrhythmias, and 1-week rate of complications were compared between the two groups. Results. All animals survived defect creation procedures uneventfully. ASD devices were successfully implanted in all sheep. Compared with the control group, the study group had significantly (P<0.05) lower mean procedure time (15.36 ± 4.86 versus 25.82 ± 7.85 min), lower mean passing time (2.69 ± 0.82 versus 5.58 ± 3.34 min), lower frequency of the guide wire dropping into the right atrium (0% versus 40%), and lower frequency of atrial (4.41 ± 2.61 versus 9.60 ± 3.68) or ventricular premature contractions (0.75 ± 0.36 versus 1.34 ± 0.68), respectively, without serious complications up to one week. Conclusion. The novel ultrasound specialized guide wire was effective in echo-guiding percutaneous ASD closure.

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