2021
Performance of quantitative flow ratio in patients with aortic stenosis undergoing transcatheter aortic valve implantation
Sejr‐Hansen M, Christiansen EH, Ahmad Y, Vendrik J, Westra J, Holm NR, Thim T, Seligman H, Hall K, Sen S, Terkelsen CJ, Eftekhari A. Performance of quantitative flow ratio in patients with aortic stenosis undergoing transcatheter aortic valve implantation. Catheterization And Cardiovascular Interventions 2021, 99: 68-73. PMID: 33533535, DOI: 10.1002/ccd.29518.Peer-Reviewed Original ResearchConceptsTranscatheter aortic valve implantationAortic valve stenosisCoronary artery diseaseInstantaneous wave-free ratioFractional flow reserveQuantitative flow ratioAortic valve implantationValve implantationDiagnostic performancePressure wirePresence of ASSevere aortic valve stenosisAortic valve replacementCoronary pressure wireGood diagnostic performanceValve replacementAortic stenosisArtery diseaseValve stenosisCoronary angiogramFlow reservePatientsCAD evaluationDiagnostic accuracyStenosis
2020
Difference in functional assessment of individual stenosis severity in serial coronary lesions between resting and hyperemic pressure-wire pullback: Insights from the GIFT registry
Warisawa T, Howard JP, Kawase Y, Tanigaki T, Omori H, Cook CM, Ahmad Y, Francis DP, Akashi YJ, Matsuo H, Davies JE. Difference in functional assessment of individual stenosis severity in serial coronary lesions between resting and hyperemic pressure-wire pullback: Insights from the GIFT registry. International Journal Of Cardiology 2020, 312: 10-15. PMID: 32376416, DOI: 10.1016/j.ijcard.2020.05.001.Peer-Reviewed Original ResearchConceptsFractional flow reserveInstantaneous wave-free ratioCoronary lesionsPressure-wire pullbackCoronary artery lesionsPhysiological assessmentArtery lesionsConsecutive patientsCoronary stenosisHemodynamic significanceWave-free periodFlow reserveHemodynamic interactionSerial lesionsSerial stenosesFunctional assessmentStenosis severityLesionsStenosisHyperemic conditionsStatistical differenceWhole cardiac cycleReference standardCardiac cyclePredominancePer-Vessel Level Analysis of Fractional Flow Reserve and Instantaneous Wave-Free Ratio Discordance ― Insights From the AJIP Registry ―
Warisawa T, Cook CM, Seligman H, Howard JP, Ahmad Y, Rajkumar C, Doi S, Nakayama M, Tanigaki T, Omori H, Nakajima A, Yamanaka F, Goto S, Yakuta Y, Karube K, Uetani T, Kikuta Y, Shiono Y, Kawase Y, Nishina H, Nakamura S, Escaned J, Akashi YJ, Matsuo H, Davies JE. Per-Vessel Level Analysis of Fractional Flow Reserve and Instantaneous Wave-Free Ratio Discordance ― Insights From the AJIP Registry ―. Circulation Journal 2020, 84: 1034-1038. PMID: 32321880, DOI: 10.1253/circj.cj-19-0785.Peer-Reviewed Original Research
2019
Determining the Predominant Lesion in Patients With Severe Aortic Stenosis and Coronary Stenoses
Ahmad Y, Vendrik J, Eftekhari A, Howard JP, Cook C, Rajkumar C, Malik I, Mikhail G, Ruparelia N, Hadjiloizou N, Nijjer S, Al-Lamee R, Petraco R, Warisawa T, Wijntjens GWM, Koch KT, van de Hoef T, de Waard G, Echavarria-Pinto M, Frame A, Sutaria N, Kanaganayagam G, Ariff B, Anderson J, Chukwuemeka A, Fertleman M, Koul S, Iglesias JF, Francis D, Mayet J, Serruys P, Davies J, Escaned J, van Royen N, Götberg M, Terkelsen C, Christiansen E, Piek JJ, Baan J, Sen S. Determining the Predominant Lesion in Patients With Severe Aortic Stenosis and Coronary Stenoses. Circulation Cardiovascular Interventions 2019, 12: e008263-e008263. PMID: 31752515, PMCID: PMC6924937, DOI: 10.1161/circinterventions.119.008263.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overAortic ValveAortic Valve StenosisBlood Flow VelocityCardiac CatheterizationCoronary Artery DiseaseCoronary CirculationCoronary StenosisCoronary VesselsEuropeFemaleHemodynamicsHumansMaleMicrocirculationPercutaneous Coronary InterventionPredictive Value of TestsRecovery of FunctionSeverity of Illness IndexTranscatheter Aortic Valve ReplacementTreatment OutcomeConceptsTranscatheter aortic valve implantationSevere aortic stenosisPercutaneous coronary interventionAortic stenosisCoronary artery diseaseCoronary stenosisIntermediate coronary stenosisCoronary diseaseCoronary interventionArtery diseaseCoronary microcirculationWave-free periodInstantaneous wave-free ratio valueConcomitant coronary artery diseaseConcomitant coronary diseaseAortic valve implantationInstantaneous wave-free ratioPhysiology-guided revascularizationExertional symptomsPost-TAVIHemodynamic improvementHemodynamic benefitsValve implantationCoronary lesionsMicrovascular resistance
2018
Coronary Hemodynamics in Patients With Severe Aortic Stenosis and Coronary Artery Disease Undergoing Transcatheter Aortic Valve Replacement Implications for Clinical Indices of Coronary Stenosis Severity
Ahmad Y, Götberg M, Cook C, Howard JP, Malik I, Mikhail G, Frame A, Petraco R, Rajkumar C, Demir O, Iglesias JF, Bhindi R, Koul S, Hadjiloizou N, Gerber R, Ramrakha P, Ruparelia N, Sutaria N, Kanaganayagam G, Ariff B, Fertleman M, Anderson J, Chukwuemeka A, Francis D, Mayet J, Serruys P, Davies J, Sen S. Coronary Hemodynamics in Patients With Severe Aortic Stenosis and Coronary Artery Disease Undergoing Transcatheter Aortic Valve Replacement Implications for Clinical Indices of Coronary Stenosis Severity. JACC Cardiovascular Interventions 2018, 11: 2019-2031. PMID: 30154062, PMCID: PMC6197079, DOI: 10.1016/j.jcin.2018.07.019.Peer-Reviewed Original ResearchMeSH KeywordsAgedAged, 80 and overAortic Valve StenosisBlood Flow VelocityCardiac CatheterizationCoronary Artery DiseaseCoronary StenosisFemaleFractional Flow Reserve, MyocardialHemodynamicsHumansHyperemiaLondonMalePredictive Value of TestsReproducibility of ResultsSeverity of Illness IndexSwedenTranscatheter Aortic Valve ReplacementTreatment OutcomeConceptsSevere aortic stenosisTranscatheter aortic valve replacementCoronary artery diseaseCoronary stenosis severityAortic stenosisHyperemic coronary flowFractional flow reserveArtery diseaseCoronary flowStenosis severityWave-free periodClinical indicesHyperemic flowFlow reserveInstantaneous wave-free ratio valueIntracoronary pressureConcomitant coronary artery diseaseAortic valve replacementStenotic aortic valvesInstantaneous wave-free ratioPhasic coronary flowValve replacementHyperemic indexAortic valveCoronary pressureFractional Flow Reserve and Instantaneous Wave-Free Ratio as Predictors of the Placebo-Controlled Response to Percutaneous Coronary Intervention in Stable Single-Vessel Coronary Artery Disease: Physiology-Stratified Analysis of ORBITA
Al-Lamee R, Howard JP, Shun-Shin MJ, Thompson D, Dehbi HM, Sen S, Nijjer S, Petraco R, Davies J, Keeble T, Tang K, Malik IS, Cook C, Ahmad Y, Sharp ASP, Gerber R, Baker C, Kaprielian R, Talwar S, Assomull R, Cole G, Keenan NG, Kanaganayagam G, Sehmi J, Wensel R, Harrell FE, Mayet J, Thom SA, Davies JE, Francis DP. Fractional Flow Reserve and Instantaneous Wave-Free Ratio as Predictors of the Placebo-Controlled Response to Percutaneous Coronary Intervention in Stable Single-Vessel Coronary Artery Disease: Physiology-Stratified Analysis of ORBITA. Circulation 2018, 138: circulationaha.118.033801. PMID: 29789302, DOI: 10.1161/circulationaha.118.033801.Peer-Reviewed Original ResearchMeSH KeywordsAdrenergic beta-1 Receptor AgonistsAgedAngina, StableCardiac CatheterizationCoronary AngiographyCoronary Artery DiseaseCoronary StenosisDobutamineEchocardiography, StressExercise TestExercise ToleranceFemaleFractional Flow Reserve, MyocardialHealth StatusHumansMaleMiddle AgedPercutaneous Coronary InterventionPredictive Value of TestsProgression-Free SurvivalQuality of LifeRecovery of FunctionSeverity of Illness IndexTime FactorsUnited KingdomConceptsPercutaneous coronary interventionInstantaneous wave-free ratioFractional flow reserveSingle-vessel coronary artery diseaseTreadmill exercise timeCoronary artery diseaseExercise timeEchocardiography scoreStable anginaCoronary interventionArtery diseaseFlow reserveCanadian Cardiovascular Society class IIEffect of PCISevere single-vessel diseaseSingle-vessel coronary diseaseMean fractional flow reserveAngina frequency scorePlacebo-controlled effectsPlacebo-controlled efficacyPlacebo-controlled trialTotal exercise timeSingle-vessel diseaseAngina severityEchocardiographic improvement
2017
Fractional Flow Reserve/Instantaneous Wave-Free Ratio Discordance in Angiographically Intermediate Coronary Stenoses An Analysis Using Doppler-Derived Coronary Flow Measurements
Cook CM, Jeremias A, Petraco R, Sen S, Nijjer S, Shun-Shin MJ, Ahmad Y, de Waard G, van de Hoef T, Echavarria-Pinto M, van Lavieren M, Lamee R, Kikuta Y, Shiono Y, Buch A, Meuwissen M, Danad I, Knaapen P, Maehara A, Koo BK, Mintz GS, Escaned J, Stone GW, Francis DP, Mayet J, Piek JJ, van Royen N, Davies JE. Fractional Flow Reserve/Instantaneous Wave-Free Ratio Discordance in Angiographically Intermediate Coronary Stenoses An Analysis Using Doppler-Derived Coronary Flow Measurements. JACC Cardiovascular Interventions 2017, 10: 2514-2524. PMID: 29268881, PMCID: PMC5743106, DOI: 10.1016/j.jcin.2017.09.021.Peer-Reviewed Original ResearchAgedBlood Flow VelocityCardiac CatheterizationCoronary AngiographyCoronary StenosisCoronary VesselsDatabases, FactualEchocardiography, DopplerFemaleFractional Flow Reserve, MyocardialHumansHyperemiaMaleMiddle AgedPredictive Value of TestsPrognosisReproducibility of ResultsRetrospective StudiesSeverity of Illness IndexDiagnostic Accuracy of Computed Tomography–Derived Fractional Flow Reserve : A Systematic Review
Cook CM, Petraco R, Shun-Shin MJ, Ahmad Y, Nijjer S, Al-Lamee R, Kikuta Y, Shiono Y, Mayet J, Francis DP, Sen S, Davies JE. Diagnostic Accuracy of Computed Tomography–Derived Fractional Flow Reserve : A Systematic Review. JAMA Cardiology 2017, 2: 803-810. PMID: 28538960, DOI: 10.1001/jamacardio.2017.1314.Peer-Reviewed Original ResearchMeSH KeywordsCoronary StenosisFractional Flow Reserve, MyocardialHumansMyocardial IschemiaSeverity of Illness IndexTomography, X-Ray ComputedConceptsFractional flow reserveFlow reserveDiagnostic accuracyFFR-CTSystematic reviewTomography-derived fractional flow reserveVessel diagnostic accuracyPatient-specific factorsSpectrum of diseasePreferred Reporting ItemsSubsequent patient carePeer-reviewed journalsInvasive angiogramMean ageMyocardial ischemiaNoninvasive testsComputed tomographyReporting ItemsDuplicate studiesPatient careMeta-AnalysisCliniciansSystematic searchInvasive FFRScientific meetings
2016
Resolving the paradox of randomised controlled trials and observational studies comparing multi-vessel angioplasty and culprit only angioplasty at the time of STEMI
Ahmad Y, Cook C, Shun-Shin M, Balu A, Keene D, Nijjer S, Petraco R, Baker CS, Malik IS, Bellamy MF, Sethi A, Mikhail GW, Al-Bustami M, Khan M, Kaprielian R, Foale RA, Mayet J, Davies JE, Francis DP, Sen S. Resolving the paradox of randomised controlled trials and observational studies comparing multi-vessel angioplasty and culprit only angioplasty at the time of STEMI. International Journal Of Cardiology 2016, 222: 1-8. PMID: 27448698, DOI: 10.1016/j.ijcard.2016.06.106.Peer-Reviewed Original ResearchConceptsHigh-risk patientsLarge observational studiesObservational studyResidual diseaseMulti-vessel coronary artery diseaseHigh mortalityPrimary percutaneous coronary interventionST-elevation myocardial infarctionPercutaneous coronary interventionCoronary artery diseaseReal-world patientsOptimal treatment strategyAllocation biasCoronary interventionCulprit arteryRisk patientsArtery diseaseMyocardial infarctionSmall RCTsWorld patientsTreatment strategiesPatientsEquivalent mortalitySTEMIMortalityQuantification of the Effect of Pressure Wire Drift on the Diagnostic Performance of Fractional Flow Reserve, Instantaneous Wave-Free Ratio, and Whole-Cycle Pd/Pa
Cook CM, Ahmad Y, Shun-Shin MJ, Nijjer S, Petraco R, Al-Lamee R, Mayet J, Francis DP, Sen S, Davies JE. Quantification of the Effect of Pressure Wire Drift on the Diagnostic Performance of Fractional Flow Reserve, Instantaneous Wave-Free Ratio, and Whole-Cycle Pd/Pa. Circulation Cardiovascular Interventions 2016, 9: e002988. PMID: 27076571, PMCID: PMC4836560, DOI: 10.1161/circinterventions.115.002988.Peer-Reviewed Original Research
2013
Preventing Stroke and Systemic Embolism in Renal Patients with Atrial Fibrillation: Focus on Anticoagulation
Ahmad Y, Lip GY. Preventing Stroke and Systemic Embolism in Renal Patients with Atrial Fibrillation: Focus on Anticoagulation. Contributions To Nephrology 2013, 179: 81-91. PMID: 23652451, DOI: 10.1159/000346726.Peer-Reviewed Original ResearchMeSH KeywordsAgedAnticoagulantsAtrial FibrillationBenzimidazolesBeta-AlanineClinical Trials as TopicComorbidityDabigatranDisease ManagementEmbolismFemaleFibrinolytic AgentsHemorrhageHumansHypertensionIntracranial EmbolismMaleMorpholinesPatient SelectionPyrazolesPyridonesRenal Insufficiency, ChronicRiskRisk FactorsRivaroxabanSeverity of Illness IndexStrokeThiophenesThrombophiliaWarfarinConceptsSevere renal impairmentAtrial fibrillationRisk factorsGeneral populationRenal impairmentRenal diseaseRenal patientsAbsence of AFLarge randomised control trialBenefits of warfarinNew oral anticoagulantsChronic kidney diseaseCohort of patientsRisk of strokeRandomised control trialEctopic vascular calcificationMajority of trialsUnique management challengesAF independentSystemic embolismOral anticoagulantsRenal insufficiencyStroke preventionThromboembolic riskStroke risk