2023
Cognitive impairment in pulmonary arterial hypertension
Heller S, See C, Singh I, Fredericks C. Cognitive impairment in pulmonary arterial hypertension. Annals Of Clinical And Translational Neurology 2023, 10: 1899-1903. PMID: 37550957, PMCID: PMC10578884, DOI: 10.1002/acn3.51867.Peer-Reviewed Original ResearchConceptsPulmonary arterial hypertensionCognitive impairmentArterial hypertensionPulmonary artery pressureRight heart dysfunctionPulmonary vascular remodelingCognitive impairment syndromeVascular cognitive impairmentArtery pressureCardiopulmonary exerciseHeart dysfunctionNoninvasive markerCognitive dysfunctionVascular remodelingAdult subjectsImpairmentHypertensionUnderlying mechanismAbnormal increaseDysfunctionSyndromeCognitive evaluationSubjects
2021
Chronic Thromboembolic Pulmonary Hypertension: the Bench
Alba GA, Atri D, Darbha S, Singh I, Tapson VF, Lewis MI, Chun HJ, Yu YR, Maron BA, Rajagopal S. Chronic Thromboembolic Pulmonary Hypertension: the Bench. Current Cardiology Reports 2021, 23: 141. PMID: 34410515, DOI: 10.1007/s11886-021-01572-6.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsChronic DiseaseEndothelial CellsHumansHypertension, PulmonaryPulmonary EmbolismThromboembolismConceptsPulmonary embolismAcute pulmonary embolismThromboembolic pulmonary hypertensionPlatelet-rich thrombiPulmonary hypertensionUncommon complicationMedical therapyPulmonary vasculatureImmune cellsAnimal modelsEndothelial cellsPathobiologyPlatelet biologyThrombusHuman samplesTherapyCurrent knowledgeSummaryThe developmentCTEPHHypertensionVasculopathyCellsComplicationsEmbolismInflammationChronic Thromboembolic Pulmonary Hypertension: the Bedside
Matusov Y, Singh I, Yu YR, Chun HJ, Maron BA, Tapson VF, Lewis MI, Rajagopal S. Chronic Thromboembolic Pulmonary Hypertension: the Bedside. Current Cardiology Reports 2021, 23: 147. PMID: 34410530, PMCID: PMC8375459, DOI: 10.1007/s11886-021-01573-5.Peer-Reviewed Original ResearchMeSH KeywordsAngioplasty, BalloonChronic DiseaseEndarterectomyHumansHypertension, PulmonaryPulmonary EmbolismConceptsPulmonary arterial hypertensionPulmonary embolismMedical therapyRight ventricular failureThromboembolic pulmonary hypertensionAcute pulmonary embolismArterial hypertensionPulmonary hypertensionVentricular failureUncommon complicationDisease mimicsPulmonary vasculatureMultimodality approachUnderlying pathologyPercutaneous interventionCurrent diagnosisCTEPHHypertensionTherapyDiagnosisTreatmentEmbolismComplicationsEmboliSurgeryPressure-based estimation of right ventricular ejection fraction: Validation as a clinically relevant target for drug development in a rodent model of pulmonary hypertension
Elassal A, Steppan J, Charania S, Santhanam L, Singh I, Heerdt PM. Pressure-based estimation of right ventricular ejection fraction: Validation as a clinically relevant target for drug development in a rodent model of pulmonary hypertension. Journal Of Pharmacological And Toxicological Methods 2021, 112: 107102. PMID: 34245885, PMCID: PMC8616781, DOI: 10.1016/j.vascn.2021.107102.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsDrug DevelopmentHumansHypertension, PulmonaryRatsRodentiaStroke VolumeVentricular Dysfunction, RightVentricular Function, RightConceptsRight ventricular ejection fractionPulmonary arterial hypertensionRV pressure waveformsVentricular ejection fractionEjection fractionDepressed right ventricular ejection fractionClear prognostic significanceRight ventricular pressurePressure waveformVolume measurementsPAH therapyPulmonary hypertensionArterial hypertensionPrognostic significanceBland-Altman analysisVentricular pressureRat modelRV volumesRodent modelsDrug effectsHypertensionDrug developmentBeat intervalsRatsRelevant targetsArterial load and right ventricular-vascular coupling in pulmonary hypertension
Oakland H, Joseph P, Naeije R, Elassal A, Cullinan M, Heerdt PM, Singh I. Arterial load and right ventricular-vascular coupling in pulmonary hypertension. Journal Of Applied Physiology 2021, 131: 424-433. PMID: 34043473, PMCID: PMC8325619, DOI: 10.1152/japplphysiol.00204.2021.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsHeart FailureHeart VentriclesHumansHypertension, PulmonaryPulmonary ArteryStroke VolumeVentricular Dysfunction, RightVentricular Function, RightConceptsPulmonary artery hypertensionRV-PA uncouplingPulmonary vascular resistancePressure waveform analysisRight ventriclePulmonary vascular impedancePulmonary hypertensionVascular impedanceRight heart catheterization dataRight ventricular-vascular couplingRV-pulmonary arterial couplingCpc-PH groupEjection fraction patientsHeart catheterization dataRV pressure curveRV-PA couplingLeft heart diseaseVentricular-vascular couplingSex-matched controlsAfterload parametersCpc-PHIpc-PHPH-HFpEFRV afterloadArtery hypertensionMacrophage-derived PDGF-B induces muscularization in murine and human pulmonary hypertension
Ntokou A, Dave JM, Kauffman AC, Sauler M, Ryu C, Hwa J, Herzog EL, Singh I, Saltzman WM, Greif DM. Macrophage-derived PDGF-B induces muscularization in murine and human pulmonary hypertension. JCI Insight 2021, 6: e139067. PMID: 33591958, PMCID: PMC8026182, DOI: 10.1172/jci.insight.139067.Peer-Reviewed Original ResearchMeSH KeywordsAnimalsHumansHypertension, PulmonaryMacrophagesMiceMuscle, SmoothProto-Oncogene Proteins c-sisConceptsRight ventricle hypertrophyPulmonary hypertensionDistal muscularizationSmooth muscle cellsHypoxia-inducible factor 2APulmonary arterial hypertension patientsLysM-Cre miceArterial hypertension patientsHuman pulmonary hypertensionHypoxia-inducible factor 1aPlatelet-derived growth factorMacrophage-conditioned mediumVentricle hypertrophyHypertension patientsDistal arteriolesMacrophage accumulationFl miceCardiovascular diseaseInterventional strategiesMuscularizationHypoxia exposureExcess macrophagesSMC proliferationLethal diseaseMuscle cellsImpact of right ventricular work and pulmonary arterial compliance on peak exercise oxygen uptake in idiopathic pulmonary arterial hypertension
Messina CMS, Ferreira EVM, Singh I, Fonseca AXC, Ramos RP, Nery LE, Systrom DM, Oliveira RKF, Ota-Arakaki JS. Impact of right ventricular work and pulmonary arterial compliance on peak exercise oxygen uptake in idiopathic pulmonary arterial hypertension. International Journal Of Cardiology 2021, 331: 230-235. PMID: 33545265, DOI: 10.1016/j.ijcard.2021.01.027.Peer-Reviewed Original ResearchMeSH KeywordsAdultFamilial Primary Pulmonary HypertensionFemaleHumansHypertension, PulmonaryMaleOxygenPulmonary ArteryVentricular Dysfunction, RightVentricular Function, RightConceptsRV stroke work indexPulmonary arterial hypertensionRight heart catheterizationExercise right heart catheterizationIdiopathic pulmonary arterial hypertensionIdiopathic PAHCardiac outputPA complianceArterial hypertensionRight ventricularDynes/s/Mean pulmonary arterial pressurePeak exercise oxygen uptakePeak stroke volume indexPA wedge pressurePeak cardiac indexPulmonary vascular resistanceStroke volume indexStroke work indexCardiopulmonary exercise testingPulmonary arterial pressurePulmonary arterial complianceRight ventricular workAge-adjusted multivariate modelExercise oxygen uptakePulmonary Hypertension in Pregnancy
Singh I, Horn E, Haythe J. Pulmonary Hypertension in Pregnancy. Clinics In Chest Medicine 2021, 42: 91-99. PMID: 33541621, DOI: 10.1016/j.ccm.2020.10.006.Peer-Reviewed Original ResearchMeSH KeywordsFemaleHemodynamicsHumansHypertension, PulmonaryPregnancyPregnancy Complications, CardiovascularConceptsPulmonary hypertensionPH patientsHigh maternal morbiditySystemic hemodynamic alterationsImmediate postpartum periodPotential deleterious consequencesMaternal morbidityHemodynamic alterationsPostpartum periodPhysiologic changesPregnancyCardiopulmonary circulationHypertensionPatientsDeleterious consequencesMorbidityMortality
2020
A 50-Year-Old Woman With Limited Scleroderma Presenting With Shortness of Breath
Walia A, Singh I, Ryu C, Lutchmansingh DD. A 50-Year-Old Woman With Limited Scleroderma Presenting With Shortness of Breath. CHEST Journal 2020, 158: e37-e40. PMID: 32654737, PMCID: PMC8097629, DOI: 10.1016/j.chest.2020.02.041.Peer-Reviewed Original ResearchMeSH KeywordsAntihypertensive AgentsDyspneaEpoprostenolFemaleHumansHypertension, PulmonaryLung Diseases, InterstitialMiddle AgedScleroderma, LimitedConceptsInterstitial lung diseasePulmonary arterial pressurePulmonary arterial hypertensionArterial hypertensionMycophenolate mofetilLimited sclerodermaArterial pressureCalculated pulmonary vascular resistanceMean pulmonary arterial pressureSevere pulmonary arterial hypertensionStable interstitial lung diseasePulmonary arterial wedge pressureLow-dose prednisonePulmonary vascular resistanceRight heart catheterizationRight atrial pressureLower extremity edemaRight ventricular pressureChronic shortnessCardiac indexChest painHeart catheterizationSick contactsVascular resistanceWedge pressure
2019
Pulmonary Vascular Distensibility and Early Pulmonary Vascular Remodeling in Pulmonary Hypertension
Singh I, Oliveira RKF, Naeije R, Rahaghi FN, Oldham WM, Systrom DM, Waxman AB. Pulmonary Vascular Distensibility and Early Pulmonary Vascular Remodeling in Pulmonary Hypertension. CHEST Journal 2019, 156: 724-732. PMID: 31121149, DOI: 10.1016/j.chest.2019.04.111.Peer-Reviewed Original ResearchConceptsPulmonary arterial hypertensionAerobic exercise capacityExercise pulmonary hypertensionPulmonary hypertensionPulmonary vascular distensibilityExercise capacityUnexplained dyspneaControl subjectsVascular distensibilitySex-matched normal control subjectsInvasive pulmonary hemodynamicsRV pressure curveRV-PA couplingRV-PA uncouplingPulmonary vascular remodelingExercise stress testingEes/EaPeak oxygen consumptionNormal control subjectsPressure-flow plotsArterial hypertensionPulmonary hemodynamicsEjection fractionHeart failureRight ventricular
2015
Pathophysiology of Pulmonary Hypertension in Chronic Parenchymal Lung Disease
Singh I, Cong K, Berlin DA. Pathophysiology of Pulmonary Hypertension in Chronic Parenchymal Lung Disease. The American Journal Of Medicine 2015, 129: 366-371. PMID: 26706386, DOI: 10.1016/j.amjmed.2015.11.026.Peer-Reviewed Original ResearchMeSH KeywordsHumansHypertension, PulmonaryIdiopathic Pulmonary FibrosisPulmonary CirculationPulmonary Disease, Chronic ObstructiveSarcoidosisConceptsLung disease-associated pulmonary hypertensionChronic obstructive pulmonary diseaseObstructive pulmonary diseasePulmonary hypertensionLung diseasePulmonary diseaseChronic parenchymal lung diseaseNormal pulmonary circulationChronic lung diseaseIdiopathic pulmonary fibrosisInterstitial lung diseaseParenchymal lung diseasePulmonary fibrosisWorse prognosisPathophysiological factorsPulmonary circulationHypertensionDiseasePathophysiologyPhysiological determinantsSarcoidosisPrognosisFibrosis