Search results for "atrium"

Catheter-based closure of a large atrial septal defect with inferior rim deficiency using pulmonary vein slide-out assisted implantation technique: a…

2021

Abstract Background Transcatheter approach for large and complex atrial septal defects may represent a therapeutic challenge, particularly when the postero-inferior rim is deficient and floppy. Case summary Here, we describe a successful catheter-based closure of a large (>30 mm) secundum atrial septal defect associated with postero-inferior rim deficiency in a 35-year-old female with congestive heart failure using pulmonary vein slide-out assisted implantation technique. Discussion Inferior–posterior rim deficiency is a well-known risk factor for device instability or embolization. Transcatheter closure may represent a safe and effective alternative to the traditional surgical appro…

Ranolazine induced modifications of ventricular fibrillation activation complexity under mechanical stretch

2013

Gradual angioplasty and stent implantation to treat complete superior vena cava occlusion after Mustard procedure

1996

A 16-year-old male was admitted with complete occlusion of the superior vena cava pathway 14 years after Mustard procedure for transposition of the great arteries. From a left subclavian vein approach, the atretic vein segment was perforated using a straight guidewire, and was followed by sequential balloon dilation. Implantation of a 30 mm Palmaz-stent through a femoral vein approach resulted in a widely patent channel of the vena cava superior into the systemic venous atrium. © 1996 Wiley-Liss, Inc.

Giant right atrial myxoma: A rare cause of cardiovascular collapse

2019

We report the case of a patient with a giant right atrial myxoma that remained clinically silent until it almost completely obliterated the right atrium, prolapsed into the right ventricle and obstructed the tricuspid valve inflow. This case illustrates the importance of rapid surgical intervention in the setting of acute heart failure caused by tumor masses obliterating heart valves or cardiac chambers.

Analysis of inter-atrium differences in paroxysmal and persistent atrial fibrillation using principal component analysis

2007

The pathophysiological mechanisms of atrial fibrillation (AF) are not entirely clear yet, and there is no full explanation for the development and evolution of the arrhythmia. The goal of this study is to find inter-atrium differences in electrophysiological behavior between persistent and paroxysmal AF. The database analyzed contains intra-cardiac records from 14 patients with paroxysmal AF and 10 with persistent AF. Dominant frequency and sample entropy measurements showed that in the paroxysmal group there was a left-to-right gradient. These differences were enhanced after the extraction of the main components with principal component analysis. These findings may be interpreted as a poss…

Ectasia and Aneurysm of the Right Coronary Artery Resulting From a Shunt to the Coronary Sinus

1998

A 65-year-old woman presented with a systolic-diastolic murmur. Further MRI investigations as well as angiography revealed an arteriovenous shunt to the coronary sinus via an enlarged right coronary artery (Figure 1A⇓ and 1B⇓). The distal part of this coronary artery was transformed to a large coronary aneurysm of such extent that the left atrium was compressed …

Acute heart failure due to giant left atrium: remote ECLS implantation for interhospital transfer and bridging to decision

2018

AbstractBackgroundRemote extracorporeal life support (ECLS) implantation and mobile ECLS are increasingly applied to enable the treatment of patients with refractory heart failure at specialized care centers. Giant left atrium (GLA) is a rare cause but may lead to acute and devastating heart failure.Case reportAcute heart failure that gave rise to a prolonged period of out-of-hospital cardiopulmonary resuscitation in a patient who underwent remote ECLS implantation was found to have resulted from a GLA of impressive dimensions. There having no reasonable option for immediate surgical therapy, the patient was successfully bridged to recovery with a view to subsequent heart transplantation.Co…

The Ipsilateral Interhemispheric Transprecuneal Approach to the Atrium: Technical Considerations and Clinical Outcome on a Series of 7 Patients

2022

Surgical removal of tumors of the atrium is challenging due to their deep location, vascularization, and to their complex three-dimensional relationships with the highly functional white matter fibers of the region. To assess the feasibility and the effectiveness of the ipsilateral interhemispheric transprecuneus approach (IITA) for tumors involving the atrium and the posterior third of the temporal horn, a retrospective chart review of all patients who had undergone a surgical treatment for intraventricular tumors between January 2008 and January 2017 was performed, and the step-by-step approach is described. Ten patients affected by lesions of the atrium of the lateral ventricle underwent…

Natriumbikarbonaatin ja beeta-alaniinin vaikutukset lyhytkestoisessa uintisuorituksessa

2012

Happo-emästasapainon säätelyllä on suuri merkitys kovatehoisessa urheilusuorituksessa. Anaerobisessa lihastyössä elimistön pH laskee ja tämä ilmenee suorituskyvyn heikkenemisenä. Uintisuorituksen energiantuotto tapahtuu suurelta osin anaerobisesti etenkin lyhyillä matkoilla (50 - 200 m), joten happo-emästasapainon säätely on merkittävässä roolissa suorituksen lopputuloksessa. Natriumbikarbonaatti on tunnetuin lisäravinne, jolla on pyritty vaikuttamaan happoemästasapainon säätelyyn urheilussa. Kiinnostus beeta-alaniinin puskurointikykyyn on lisääntynyt viime vuosina tehtyjen tutkimusten ansiosta ja sen uskotaan olevan myös hyvin tehokas puskuri. Näiden kahden aineen yhteisvaikutusta ei kuite…