Search results for "Chronic atrial fibrillation"

showing 3 items of 3 documents

Wave similarity mapping shows the spatiotemporal distribution of fibrillatory wave complexity in the human right atrium during paroxysmal and chronic…

2005

Introduction: The complexity of waveforms during atrial fibrillation may reflect critical activation patterns for the arrhythmia perpetuation. In this study, we introduce a novel concept of map, based on the analysis of the wave morphology, which gives a direct evidence in the human right atrium on the spatiotemporal distribution of fibrillatory wave complexity in paroxysmal (PAF) and chronic (CAF) atrial fibrillation. Methods and Results: Electrograms were recorded from a 64-electrode catheter in the right atrium of 15 patients during PAF (n = 8) and CAF (n = 7). Wave similarity maps were constructed by calculating the degree of morphological similarity of activation waves (S) at each atri…

AdultMalemedicine.medical_specialtyMorphological similarityPhysiologyArrhythmia (mechanisms)Heart Conduction SystemPhysiology (medical)Internal medicineAtrial FibrillationmedicineChronic atrial fibrillationHumansWaveHeart AtriaAnatomic LocationAtrium (architecture)business.industryBody Surface Potential MappingSpatiotemporal patternAtrial fibrillationMiddle Agedmedicine.diseasemedicine.anatomical_structureMappingChronic DiseaseCardiologyRight atriumFemalebusinessLateral wallSubstrateCardiology and Cardiovascular MedicineElectrophysiologic Techniques CardiacJournal of cardiovascular electrophysiology
researchProduct

Chronic atrial fibrillation in presence of aortic stenosis in a patient with polysplenia syndrome.

2013

We report a rare case of “situs viscerum ambiguous” with polysplenia syndrome, in a 69 year old female patient with aortic stenosis and chronic atrial fibrillation. The presenting symptom was dyspnoea on moderate exertion and an ECG showed supra ventricular arrhythmia. Patients trans-thoracic echocardiogram revealed a dilated left atrium, reduced ejection fraction, mild tricuspid regurgitation, moderate-severe pulmonary hypertension and severe aortic stenosis. The patient was successfully treated with a replacement of her aortic valve and ascending aorta.

Aortic valvemedicine.medical_specialtyPolysplenia syndromeRegurgitation (circulation)Heterotaxy SyndromePolysplenia Aortic Stenosis Atrial Fibrillationmedicine.arteryInternal medicineAscending aortaAtrial FibrillationMedicineChronic atrial fibrillationHumanscardiovascular diseasesAortaAgedHeart Valve Prosthesis ImplantationEjection fractionbusiness.industryGeneral MedicineAortic Valve Stenosismedicine.diseasePulmonary hypertensionSettore MED/11 - Malattie Dell'Apparato CardiovascolareStenosismedicine.anatomical_structureTreatment OutcomeChronic Diseasecardiovascular systemCardiologyFemalebusinessActa clinica Belgica
researchProduct

Role of Rate Control and Regularization Through Pacing in Patients With Chronic Atrial Fibrillation and Preserved Ventricular Function: The VRR Study

2006

Aim: High heart rates in chronic atrial fibrillation (CAF) is one of the factors responsible for hemodynamic alterations and may lead to tachycardiomyopathies. The ventricular rate regulation (VRR) study evaluates the effect of ventricular rate regularization in CAF patients with preserved ventricular function, marked ventricular rate variability, and indications for pacemaker (PM) implantation owing to symptomatic pauses. Rate regularization was achieved using VRR algorithm (INSIGNIA® pacemakers, Guidant Corp., St. Paul, MN, USA). Methods: One month after PM implantation, 58 patients followed two 3-month crossover periods (VRR-OFF; VRR-ON) in which the VRR algorithm was randomized and comp…

Malemedicine.medical_specialtyHemodynamicsVentricular Dysfunction LeftHeart RateInternal medicineAtrial FibrillationmedicineHumansChronic atrial fibrillationIn patientLead (electronics)Ventricular functionbusiness.industryCardiac Pacing ArtificialRate controlAtrial fibrillationGeneral MedicineMiddle Agedmedicine.diseaseTreatment OutcomeWalk testAnesthesiaChronic DiseaseTachycardia VentricularCardiologyFemaleCardiology and Cardiovascular MedicinebusinessPacing and Clinical Electrophysiology
researchProduct