2024
The metabolic and physiologic impairments underlying long COVID associated exercise intolerance
Leitner B, Joseph P, Quast A, Ramirez M, Heerdt P, Villalobos J, Singh I. The metabolic and physiologic impairments underlying long COVID associated exercise intolerance. Pulmonary Circulation 2024, 14: e70009. PMID: 39544193, PMCID: PMC11560803, DOI: 10.1002/pul2.70009.Peer-Reviewed Original ResearchPeak VO<sub>2</sub>Long COVID patientsCOVID patientsReduced peak VOSeverity of SARS-CoV-2 infectionSystemic oxygen extractionSARS-CoV-2 infectionLong COVIDArterial blood samplesQuantitative metabolomicsPeak VOVenous lactateCardiac outputImpaired mitochondrial ATP productionMild infectionExercise capacityPatientsMitochondrial ATP productionExercise intoleranceArteriovenous gradientBlood samplesOxygen extractionDependent mannerMetabolomicsPhysiological impairmentTumoral Pulmonary Hypertension in a Patient With Metastatic Breast Cancer: Diagnostic Opportunity of the Right Heart Catheterization
Tarras E, Sen S, Wang H, Singh I. Tumoral Pulmonary Hypertension in a Patient With Metastatic Breast Cancer: Diagnostic Opportunity of the Right Heart Catheterization. 2024, a2208-a2208. DOI: 10.1164/ajrccm-conference.2024.209.1_meetingabstracts.a2208.Peer-Reviewed Original Research
2023
Right Heart Failure in the Intensive Care Unit: Etiology, Pathogenesis, Diagnosis, and Treatment.
Tarras E, Khosla A, Heerdt P, Singh I. Right Heart Failure in the Intensive Care Unit: Etiology, Pathogenesis, Diagnosis, and Treatment. Journal Of Intensive Care Medicine 2023, 8850666231216889. PMID: 38031338, DOI: 10.1177/08850666231216889.Peer-Reviewed Original ResearchRight heart failureFailure patientsHeart failureTreatment optionsIntensive care unit settingMechanical circulatory support devicesIntensive care unitCirculatory support devicesCardio-pulmonary physiologyCare unitDifferent pharmacotherapiesUnit settingClinical guidancePathophysiological manifestationsCirculatory physiologyIntensivistsPatientsSupport devicesSupport optionsCirculatory systemHigh rateTreatmentDiagnosisFailureOptionsHigh-Risk Pulmonary Embolism: Management for the Intensivist
Khosla A, Zhao Y, Mojibian H, Pollak J, Singh I. High-Risk Pulmonary Embolism: Management for the Intensivist. Journal Of Intensive Care Medicine 2023, 38: 1087-1098. PMID: 37455352, DOI: 10.1177/08850666231188290.Peer-Reviewed Original ResearchConceptsHigh-risk pulmonary embolismHigh-risk PE patientsPulmonary embolismRisk stratificationPE patientsTreatment optionsRisk pulmonary embolismMassive pulmonary embolismIntensivist’s perspectiveReperfusion therapySupportive careAcute managementPatientsIntensivistsSupport optionsEmbolismHigh rateCarePhysiological consequencesOutcomesTreatmentOptionsStratificationMorbidityTherapyProteomic profiling demonstrates inflammatory and endotheliopathy signatures associated with impaired cardiopulmonary exercise hemodynamic profile in Post Acute Sequelae of SARS‐CoV‐2 infection (PASC) syndrome
Singh I, Leitner B, Wang Y, Zhang H, Joseph P, Lutchmansingh D, Gulati M, Possick J, Damsky W, Hwa J, Heerdt P, Chun H. Proteomic profiling demonstrates inflammatory and endotheliopathy signatures associated with impaired cardiopulmonary exercise hemodynamic profile in Post Acute Sequelae of SARS‐CoV‐2 infection (PASC) syndrome. Pulmonary Circulation 2023, 13: e12220. PMID: 37091121, PMCID: PMC10113513, DOI: 10.1002/pul2.12220.Peer-Reviewed Original ResearchInvasive cardiopulmonary exercise testPASC patientsPost-acute sequelaeAcute sequelaeInfection syndromeUnexplained exertional intoleranceCardiopulmonary exercise testSystemic oxygen deliveryPersistent inflammatory stateVenous blood plasmaExertional intolerancePeak exerciseEndothelial dysfunctionHemodynamic profileInflammatory stateExercise testFibrotic processPathophysiological hallmarkAberrant protein expressionExpression of proteinsOxygen deliveryOxygen extractionProteomic profilingPatientsPhysiologic responsesNoninvasive determinants of pulmonary hypertension in interstitial lung disease
Joseph P, Savarimuthu S, Zhao J, Yan X, Oakland H, Cullinan M, Heerdt P, Singh I. Noninvasive determinants of pulmonary hypertension in interstitial lung disease. Pulmonary Circulation 2023, 13: e12197. PMID: 36814586, PMCID: PMC9939578, DOI: 10.1002/pul2.12197.Peer-Reviewed Original ResearchInterstitial lung diseaseFVC/DLCO ratioPH-ILDRight heart catheterizationPulmonary hypertensionHeart catheterizationILD patientsLung diseaseDiagnostic right heart catheterizationRight ventricular systolic pressurePulmonary vascular capacitanceVentricular systolic pressureCharacteristic curve analysisMaximum oxygen uptakeExertional capacityNoninvasive determinantsSystolic pressureVascular capacitancePhysiologic evaluationPatientsNoninvasive variablesMultivariate analysisMmHgDiagnostic standardPotential initiation
2022
Short- and long-term noninvasive cardiopulmonary exercise assessment in previously hospitalised COVID-19 patients
Singh I, Joseph P. Short- and long-term noninvasive cardiopulmonary exercise assessment in previously hospitalised COVID-19 patients. European Respiratory Journal 2022, 61: 2201739. PMID: 36137592, PMCID: PMC9515479, DOI: 10.1183/13993003.01739-2022.Peer-Reviewed Original ResearchConceptsCOVID-19 patientsAcute respiratory syndrome coronavirus 2 infectionSevere acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infectionNoninvasive cardiopulmonary exercise testingSyndrome coronavirus 2 infectionCoronavirus 2 infectionCardiopulmonary exercise testingCoronavirus disease 2019 (COVID-19) pandemicSARS-CoV-2Disease 2019 pandemicExercise testingGlobal healthcare systemsInterval improvementExercise assessmentAerobic capacityHealthcare systemPatientsHospitalisationWorld populationPopulationInfectionMonths
2021
Quantification of Arterial and Venous Morphologic Markers in Pulmonary Arterial Hypertension Using CT Imaging
Rahaghi FN, Nardelli P, Harder E, Singh I, Sánchez-Ferrero GV, Ross JC, San José Estépar R, Ash SY, Hunsaker AR, Maron BA, Leopold JA, Waxman AB, San José Estépar R, Washko GR. Quantification of Arterial and Venous Morphologic Markers in Pulmonary Arterial Hypertension Using CT Imaging. CHEST Journal 2021, 160: 2220-2231. PMID: 34270966, PMCID: PMC8692106, DOI: 10.1016/j.chest.2021.06.069.Peer-Reviewed Original ResearchConceptsExercise pulmonary hypertensionPulmonary arterial hypertensionControl subjectsPulmonary hypertensionSmall vessel volumeArterial hypertensionPulmonary arteryPulmonary vasculatureVascular tortuosityVascular volumeArterial volumePrecapillary pulmonary hypertensionCohort of patientsPulmonary vascular volumeVenous manifestationsThromboembolic diseaseCT angiogramArterial tortuosityHypertensionCT scanVessel volumeHeterogeneous diseasePatientsStudy designArteryPulmonary 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 ResearchConceptsPulmonary hypertensionPH patientsHigh maternal morbiditySystemic hemodynamic alterationsImmediate postpartum periodPotential deleterious consequencesMaternal morbidityHemodynamic alterationsPostpartum periodPhysiologic changesPregnancyCardiopulmonary circulationHypertensionPatientsDeleterious consequencesMorbidityMortality
2020
CHARACTERISTICS AND OUTCOMES OF PATIENTS WITH COVID-19 WITH RESPIRATORY FAILURE REQUIRING EXTRACORPOREAL MEMBRANE OXYGENATION
Fouad J, Singh I, Khosla A, Szabo C, Tantawy H, Razo-Vazquez A, Geirsson A, Bonde P, Fajardo E, Joseph P, Siner J, Chichra A. CHARACTERISTICS AND OUTCOMES OF PATIENTS WITH COVID-19 WITH RESPIRATORY FAILURE REQUIRING EXTRACORPOREAL MEMBRANE OXYGENATION. CHEST Journal 2020, 158: a703-a704. PMCID: PMC7548617, DOI: 10.1016/j.chest.2020.08.660.Peer-Reviewed Original ResearchSystemic vascular distensibility relates to exercise capacity in connective tissue disease
Singh I, Oliveira RKF, Naeije R, Oldham WM, Faria-Urbina M, Waxman AB, Systrom DM. Systemic vascular distensibility relates to exercise capacity in connective tissue disease. Rheumatology 2020, 60: 1429-1434. PMID: 33001175, DOI: 10.1093/rheumatology/keaa510.Peer-Reviewed Original ResearchConceptsCTD patientsSystemic oxygen extractionExercise capacityVascular distensibilityCardiopulmonary diseaseOxygen extractionDecreased exercise capacityStroke volume augmentationReduced exercise capacityCommon clinical manifestationsRadial arterial catheterConnective tissue diseaseAerobic exercise capacityPulmonary vascular distensibilityCardio-pulmonary diseasePressure-flow plotsPulmonary hypertensionCardiopulmonary exerciseHeart failureArterial catheterExercise intoleranceTissue diseaseClinical manifestationsNormal controlsPatientsPrecision Medicine in Pulmonary Hypertension
Singh I, Oldham W, Rahaghi F. Precision Medicine in Pulmonary Hypertension. Respiratory Medicine 2020, 241-255. DOI: 10.1007/978-3-030-31507-8_16.Peer-Reviewed Original ResearchPulmonary hypertensionManagement of patientsMultiple different etiologiesPersonalized medicine approachClinical characteristicsExercise testingDifferent etiologiesInnovative biomarkersComplex pathobiologyMedicine approachHeterogeneous disorderHemodynamic analysisHypertensionPrecision medicineImaging techniquesCurrent classificationPatientsHemodynamicsEtiologyPathobiologyBiomarkers
2015
Pulmonary Nocardiosis in the Immunocompetent Host: Case Series
Singh I, West F, Sanders A, Hartman B, Zappetti D. Pulmonary Nocardiosis in the Immunocompetent Host: Case Series. Case Reports In Pulmonology 2015, 2015: 314831. PMID: 26491594, PMCID: PMC4605260, DOI: 10.1155/2015/314831.Peer-Reviewed Original Research