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 impairment
2023
Differential cardiopulmonary haemodynamic phenotypes in PASC-related exercise intolerance
Kahn P, Joseph P, Heerdt P, Singh I. Differential cardiopulmonary haemodynamic phenotypes in PASC-related exercise intolerance. ERJ Open Research 2023, 10: 00714-2023. PMID: 38348243, PMCID: PMC10860209, DOI: 10.1183/23120541.00714-2023.Peer-Reviewed Original ResearchInvasive cardiopulmonary exercise testingRight heart catheterizationPASC patientsExertional intoleranceCardiac outputPulmonary artery wedge pressurePeak VO 2Supranormal cardiac outputPeak exercise capacityCardiopulmonary exercise testingMaximal voluntary ventilationPost-acute sequelaeBody mass indexSystemic oxygen extractionMild acute illnessSARS-CoV-2Exercise hemodynamicsHFpEF patientsHFpEF phenotypeHeart catheterizationWedge pressureAcute illnessExercise capacityExercise testingHemodynamic abnormalities