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Cardiac CathetersCardiac CatheterizationCatheters, IndwellingCathetersMyocytes, CardiacCatheterizationCatheterization, Central VenousCardiac OutputHeartArrhythmias, CardiacCardiac Surgical ProceduresCentral Venous CathetersCatheterization, PeripheralDeath, Sudden, CardiacUrinary CatheterizationEquipment FailureUrinary CathetersCardiac Pacing, ArtificialCardiac TamponadeCatheter-Related InfectionsEquipment DesignHeart DiseasesElectrocardiographyCardiomegalyTime FactorsMyocardiumHeart VentriclesMyocardial ContractionTreatment OutcomeHeart ArrestCatheterization, Swan-GanzProspective StudiesHeart AtriaHemodynamicsHeart Conduction SystemHeart RateCardiac Imaging TechniquesEchocardiographyHeart FailureCardiomyopathiesForeign-Body MigrationMyoblasts, CardiacDogsAtrial FibrillationCardiac MyosinsMyocardial InfarctionRetrospective StudiesVentricular Function, LeftCardiac VolumeCardiac GlycosidesBlood PressureJugular VeinsCardiac Output, LowFollow-Up StudiesFluoroscopyOut-of-Hospital Cardiac ArrestSubclavian VeinHeart TransplantationVentricular RemodelingPulmonary VeinsHeart Defects, CongenitalTroponin IStroke Volume

Positioning of the ablation catheter in total endoscopic ablation. (73/76)

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Percutaneous balloon pericardiotomy using the Inoue balloon for patients with recurrent pericardial tamponade. (74/76)

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Effects of reprocessing on chemical and morphological properties of guide wires used in angioplasty. (75/76)

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Incidence and anatomical locations of catheter instability during circumferential pulmonary vein isolation using contact force. (76/76)

In addition to contact force (CF), catheter stability is considered to be an important factor in creating radiofrequency lesions.To evaluate the catheter stability during pulmonary vein isolation (PVI) using CF-sensing catheter.PVI was performed in 32 patients using a CF-sensing catheter. Operators were blinded to CF. The application was arbitrarily defined as a "visually unstable" point if the catheter moved >/= 4 mm. Data were analyzed according to 6 predefined segments for the ipsilateral PVs. As a parameter of catheter stability, the standard deviation (SD) of CF and relative standard deviation (RSD = 100 x SD of CF /average CF) were introduced.A total of 932 RF applications with 426 visually unstable points (UP; 45.7%) and 506 stable points (SP; 54.3%) were analyzed. SD was significantly higher at UP (8.0 g versus 5.7 g, P < 0.001), and RSD was significantly higher at UP (43.7% versus 26.5%, P < 0.001). Higher RSD was associated with visual instability in all the segments of both PVs, however, higher SD of CF was not in all segments. At the antero-superior segment of the LPV, and the roof and posteroinferior segments of the RPV, the RSD values were over 50%, suggesting catheter instability.Catheter instability occurred in 45% of ablations during PVI and was predominantly located in the antero-superior segment of the LPV and postero-inferior segment of the RPV, which may result in incomplete lesion formation. RSD had significant correlation with visual catheter stability.  (+info)