2023
PPP1R12C Promotes Atrial Hypocontractility in Atrial Fibrillation
Perike S, Gonzalez-Gonzalez F, Abu-Taha I, Damen F, Hanft L, Lizama K, Aboonabi A, Capote A, Aguilar-Sanchez Y, Levin B, Han Z, Sridhar A, Grand J, Martin J, Akar J, Warren C, Solaro R, Ong S, Darbar D, McDonald K, Goergen C, Wolska B, Dobrev D, Wehrens X, McCauley M. PPP1R12C Promotes Atrial Hypocontractility in Atrial Fibrillation. Circulation Research 2023, 133: 758-771. PMID: 37737016, PMCID: PMC10616980, DOI: 10.1161/circresaha.123.322516.Peer-Reviewed Original ResearchConceptsSinus rhythm controlsAtrial hypocontractilityAF inducibilityAtrial contractilityAtrial fibrillationRhythm controlHuman patientsRight atrial appendage tissuePacing-induced AFThromboembolic stroke riskAtrial ejection fractionAtrial appendage tissueAtrial HL-1 cellsHL-1 cellsAtrial strainStroke riskAtrial sizeEjection fractionContractile functionElectrophysiology studyHypocontractilityWestern blotPatientsAtrial myosin light chainSarcomere function
2018
Luminal esophageal temperature monitoring to reduce esophageal thermal injury during catheter ablation for atrial fibrillation: A review
Kadado AJ, Akar JG, Hummel JP. Luminal esophageal temperature monitoring to reduce esophageal thermal injury during catheter ablation for atrial fibrillation: A review. Trends In Cardiovascular Medicine 2018, 29: 264-271. PMID: 30282588, DOI: 10.1016/j.tcm.2018.09.010.Peer-Reviewed Original Research
2017
Oxidative stress and inflammation as central mediators of atrial fibrillation in obesity and diabetes
Karam BS, Chavez-Moreno A, Koh W, Akar JG, Akar FG. Oxidative stress and inflammation as central mediators of atrial fibrillation in obesity and diabetes. Cardiovascular Diabetology 2017, 16: 120. PMID: 28962617, PMCID: PMC5622555, DOI: 10.1186/s12933-017-0604-9.Peer-Reviewed Original ResearchConceptsAtrial fibrillationOxidative stressCommon sustained cardiac arrhythmiaMaintenance of AFSustained cardiac arrhythmiaDiabetic heartElectrical remodelingRisk factorsAtrial excitabilityTherapeutic strategiesCardiac arrhythmiasInflammationCentral mediatorObesityDiabetesFibrillationMechanistic linkMellitusArrhythmiasExcitability
2015
LKB1 deletion causes early changes in atrial channel expression and electrophysiology prior to atrial fibrillation
Kim GE, Ross JL, Xie C, Su KN, Zaha VG, Wu X, Palmeri M, Ashraf M, Akar JG, Russell KS, Akar FG, Young LH. LKB1 deletion causes early changes in atrial channel expression and electrophysiology prior to atrial fibrillation. Cardiovascular Research 2015, 108: 197-208. PMID: 26378152, PMCID: PMC4571838, DOI: 10.1093/cvr/cvv212.Peer-Reviewed Original ResearchConceptsLiver kinase B1Protein kinaseLKB1 deletionMetabolic regulator AMPAtrial fibrillationChannel expressionMHC-CreElectrophysiological functionKnockout mouse modelRelated kinasesLKB1 pathwayGene expressionPerpetuation of AFKinase B1Neonatal atrial myocytesΑMHC-CreKinasePostnatal day 1Patch-clamp recordingsAtrial growthWeeks of ageDeletionSodium current densityAction potential generationSpecific role
2007
Regulation of ion channels and arrhythmias in the ischemic heart
Akar JG, Akar FG. Regulation of ion channels and arrhythmias in the ischemic heart. Journal Of Electrocardiology 2007, 40: s37-s41. PMID: 17993326, DOI: 10.1016/j.jelectrocard.2007.05.020.Peer-Reviewed Original ResearchConceptsIschemic injuryElectrophysiological changesIschemic heart diseaseBest treatment strategyCoronary eventsReperfusion phaseVentricular arrhythmiasIschemic episodesHeart diseaseLeading causeElectrical dysfunctionTreatment strategiesIschemic heartMetabolic substratesPatientsArrhythmiasKey cellularTime courseInjuryIon channelsHeartDysfunctionMortalityDisease
2006
Mapping arrhythmias in the failing heart: from Langendorff to patient
Akar JG, Akar FG. Mapping arrhythmias in the failing heart: from Langendorff to patient. Journal Of Electrocardiology 2006, 39: s19-s23. PMID: 16920143, DOI: 10.1016/j.jelectrocard.2006.03.011.Peer-Reviewed Educational MaterialsConceptsHeart failureVentricular arrhythmiasOptical action potential mappingSudden cardiac deathCardiac deathIntact tissue preparationsCardiac remodelingMost arrhythmiasArrhythmic substrateArrhythmiasElectrophysiological propertiesMapping arrhythmiasTissue levelsIndividual myocytesMajor causeReentrant excitationOrgan system levelPatientsMultiple mechanismsTissue preparationsHeartRecent findingsHost of changesCellular studiesLangendorff
2003
Intracellular Chloride Accumulation and Subcellular Elemental Distribution During Atrial Fibrillation
Akar JG, Everett TH, Ho R, Craft J, Haines DE, Somlyo AP, Somlyo AV. Intracellular Chloride Accumulation and Subcellular Elemental Distribution During Atrial Fibrillation. Circulation 2003, 107: 1810-1815. PMID: 12665494, DOI: 10.1161/01.cir.0000058462.23347.93.Peer-Reviewed Original ResearchConceptsEffective refractory periodLeft atrial appendageAtrial fibrillationMitochondrial Ca overloadWhole-cell ClWhole-cell NaIntracellular chloride accumulationIntracellular Cl- accumulationSinus rhythmAtrial appendageCa overloadElectrical remodelingAF pathogenesisRapid pacingRefractory periodTransient increaseTransverse cryosectionsMembrane depolarizationFibrillationNovel findingsCytosolic CaCytoplasmic CaConcomitant increaseIon channelsMinutesEffect of Heating on Pulmonary Veins:
KOK LC, EVERETT TH, AKAR JG, HAINES DE. Effect of Heating on Pulmonary Veins:. Journal Of Cardiovascular Electrophysiology 2003, 14: 250-254. PMID: 12716105, DOI: 10.1046/j.1540-8167.2003.02490.x.Peer-Reviewed Original ResearchConceptsRadiofrequency energy catheter ablationHyperthermic exposurePulmonary vein stenosisChronic atrial fibrillationTreatment of patientsLoss of complianceHeat-induced contractionHeat exposurePV stenosisVein stenosisCatheter ablationAtrial fibrillationPulmonary veinsLeft atriumAcute effectsMain PVCanine heartPV specimensMean circumferenceDegrees CStenosisExposureBaselineCircumferenceCollagen matrix
2002
Use of global atrial fibrillation organization to optimize the success of burst pace termination
Everett TH, Akar JG, Kok LC, Moorman JR, Haines DE. Use of global atrial fibrillation organization to optimize the success of burst pace termination. Journal Of The American College Of Cardiology 2002, 40: 1831-1840. PMID: 12446068, DOI: 10.1016/s0735-1097(02)02476-2.Peer-Reviewed Original ResearchConceptsAtrial fibrillationRight atriumPace terminationBiatrial pacingAtrial conduction blockSuccess rateBipolar atrial electrogramOverall success rateOrganization indexAtrial pacingDecapolar catheterConduction blockAtrial electrogramsBurst terminationElectrogram recordingsPacingHigh efficacyAtrial fibrillation organizationFibrillationEffect of Electrical and Structural Remodeling on Spatiotemporal Organization in Acute and Persistent Atrial Fibrillation
AKAR JG, EVERETT TH, KOK L, MOORMAN JR, HAINES DE. Effect of Electrical and Structural Remodeling on Spatiotemporal Organization in Acute and Persistent Atrial Fibrillation. Journal Of Cardiovascular Electrophysiology 2002, 13: 1027-1034. PMID: 12435191, DOI: 10.1046/j.1540-8167.2002.01027.x.Peer-Reviewed Original ResearchMeSH KeywordsAcute DiseaseAnimalsAtrial FibrillationAtrial FunctionDisease Models, AnimalDogsElectrocardiographyElectrophysiologic Techniques, CardiacEntropyFemaleFollow-Up StudiesHeart AtriaModels, CardiovascularRecovery of FunctionRefractory Period, ElectrophysiologicalSeverity of Illness IndexStatistics as TopicTreatment OutcomeConceptsAtrial effective refractory periodPersistent atrial fibrillationAcute atrial fibrillationAtrial fibrillationStructural remodelingSinus rhythmMean atrial effective refractory periodEffective refractory periodAtrial sizeElectrical remodelingLeft atriumBasket catheterAF dogsIntracardiac echocardiographyAtrial electrogramsRefractory periodRemodelingFibrillationSpatiotemporal organizationRhythmAcuteEchocardiographyCatheterMajor roleRecovery
2001
Assessment of Global Atrial Fibrillation Organization to Optimize Timing of Atrial Defibrillation
Everett T, Moorman J, Kok L, Akar J, Haines D. Assessment of Global Atrial Fibrillation Organization to Optimize Timing of Atrial Defibrillation. Circulation 2001, 103: 2857-2861. PMID: 11401945, DOI: 10.1161/01.cir.103.23.2857.Peer-Reviewed Original Research