Syed Usman Bin Mahmood, MBBS
Hospital ResidentCards
About
Research
Publications
2018
Comparable perioperative outcomes and mid-term survival in prosthetic valve endocarditis and native valve endocarditis
Mori M, Shioda K, Tiako MJ, Bin Mahmood SU, Mangi AA, Yun JJ, Darr U, Pang PYK, Geirsson A. Comparable perioperative outcomes and mid-term survival in prosthetic valve endocarditis and native valve endocarditis. European Journal Of Cardio-Thoracic Surgery 2018, 54: 1067-1072. PMID: 29726931, DOI: 10.1093/ejcts/ezy191.Peer-Reviewed Original ResearchConceptsProsthetic valve endocarditisMid-term survivalNative valve endocarditisTertiary care hospitalKaplan-Meier analysisValve endocarditisOperative mortalityPerioperative outcomesCardiac surgeryCare hospitalOperative outcomesDiagnosis of PVESingle-institutional retrospective reviewCox proportional hazards analysisCox proportional hazards modelCenter case volumeComparable perioperative outcomesMid-term mortalityHigh-risk surgeryProportional hazards analysisMultivariable logistic regressionHazard of deathComplex patient populationLarge observational studiesComposite eventsIncidence of endophthalmitis after intravitreal injections at a tertiary care hospital
Zafar S, Hamid A, Bin Mahmood SU, Burq MA, Maqsood N. Incidence of endophthalmitis after intravitreal injections at a tertiary care hospital. Canadian Journal Of Ophthalmology 2018, 53: 94-97. PMID: 29631833, DOI: 10.1016/j.jcjo.2017.07.027.Peer-Reviewed Original ResearchConceptsIncidence of endophthalmitisIntravitreal injectionAnti-vascular endothelial growth factor therapyEndothelial growth factor therapySingle-center retrospective studyAga Khan University HospitalTertiary care hospitalGrowth factor therapyCases of endophthalmitisRole of antibioticsOperating room settingPostinjection antibioticsFactor therapyCare hospitalRetrospective studyUniversity HospitalInjection riskSurgical settingEndophthalmitisUnnecessary useRoom settingStudy periodInjectionHospitalIncidenceSpontaneous rupture of the ascending aorta
Bin Mahmood SU, Ulrich A, Safdar B, Geirsson A, Mangi AA. Spontaneous rupture of the ascending aorta. Journal Of Cardiac Surgery 2018, 33: 107-114. PMID: 29405382, DOI: 10.1111/jocs.13535.Peer-Reviewed Original ResearchConceptsAortic ruptureAortic diameterSpontaneous ruptureHereditary connective tissue disordersHigh-risk patientsConnective tissue disordersOperating room timeRisk of ruptureOperative mortalityChest painMedian doorMost patientsAortic diseaseTissue disordersRoom timePatientsRapid diagnosisSuccessful managementMultidisciplinary approachEmergency protocolsAortaRuptureHypertensionPainEtiology
2017
Height alone, rather than body surface area, suffices for risk estimation in ascending aortic aneurysm
Zafar MA, Li Y, Rizzo JA, Charilaou P, Saeyeldin A, Velasquez CA, Mansour AM, Bin Mahmood SU, Ma WG, Brownstein AJ, Tranquilli M, Dumfarth J, Theodoropoulos P, Thombre K, Tanweer M, Erben Y, Peterss S, Ziganshin BA, Elefteriades JA. Height alone, rather than body surface area, suffices for risk estimation in ascending aortic aneurysm. Journal Of Thoracic And Cardiovascular Surgery 2017, 155: 1938-1950. PMID: 29395211, DOI: 10.1016/j.jtcvs.2017.10.140.Peer-Reviewed Original ResearchMeSH KeywordsAdolescentAdultAgedAged, 80 and overAortic Aneurysm, ThoracicBody HeightBody Surface AreaDatabases, FactualDecision Support TechniquesDisease ProgressionFemaleHumansMaleMiddle AgedPredictive Value of TestsProgression-Free SurvivalRetrospective StudiesRisk AssessmentRisk FactorsTime FactorsYoung AdultConceptsAortic size indexBody surface areaAortic height indexAortic diameterAortic aneurysmYearly riskComplication-free survivalLong-term complicationsRisk of complicationsRisk estimationAortic dissectionComplication rateAortic sizeRisk stratificationComplicationsPredictive valueConcordance statisticInternational guidelinesNatural complicationsPatientsHeight indexSignificant predictorsAneurysmsTAAARiskMedical management of aortic disease in Marfan syndrome.
Bin Mahmood SU, Velasquez CA, Zafar MA, Saeyeldin AA, Brownstein AJ, Ziganshin BA, Elefteriades JA, Mukherjee SK. Medical management of aortic disease in Marfan syndrome. Annals Of Cardiothoracic Surgery 2017, 6: 654-661. PMID: 29270377, PMCID: PMC5721117, DOI: 10.21037/acs.2017.11.09.Peer-Reviewed Original ResearchAngiotensin receptor blockersMedical managementMarfan syndromeMFS patientsThoracic aortic aneurysm diseaseDifferent medical regimensStandard of careAortic aneurysm diseaseNumerous pathophysiological effectsAortic dilatationReceptor blockersAortic diseaseMedical regimensCurrent guidelinesAneurysm diseaseCardiovascular organsΒ-blockersCurrent evidencePathophysiological effectsHereditary disorderPatientsSyndromeDiseaseRegimensManagementTwo-Stage Elephant Trunk approach for open management of distal aortic arch and descending aortic pathology in patients with Marfan syndrome.
Velasquez CA, Zafar MA, Saeyeldin A, Bin Mahmood SU, Brownstein AJ, Erben Y, Ziganshin BA, Elefteriades JA. Two-Stage Elephant Trunk approach for open management of distal aortic arch and descending aortic pathology in patients with Marfan syndrome. Annals Of Cardiothoracic Surgery 2017, 6: 712-720. PMID: 29270386, PMCID: PMC5721112, DOI: 10.21037/acs.2017.11.11.Peer-Reviewed Original ResearchPrecipitous Resolution of Type-A Intramural Hematoma with Medical Management in a Patient with Metastatic Stage 4 Renal Cell Carcinoma
Velasquez CA, Bin Mahmood SU, Zafar MA, Brownstein AJ, Saeyeldin A, Ziganshin BA, Elefteriades JA. Precipitous Resolution of Type-A Intramural Hematoma with Medical Management in a Patient with Metastatic Stage 4 Renal Cell Carcinoma. International Journal Of Angiology 2017, 26: 267-270. PMID: 29142496, PMCID: PMC5685788, DOI: 10.1055/s-0037-1604333.Peer-Reviewed Original ResearchAnti-impulse therapyStage 4 renal cell carcinomaIntramural hematomaRenal cell carcinomaAcute typeMedical managementCell carcinomaElderly male patientsStandard of careBlood pressure stabilizationImmediate medical managementSurgical candidatesAortic dissectionMale patientsIntimal flapSurgical extirpationComplete resolutionAortic mediaPatientsTherapyConservative approachHematomaCarcinomaVariant formWestern worldThe Effect of Blood Transfusion on Outcomes in Aortic Surgery
Velasquez CA, Singh M, Bin Mahmood SU, Brownstein AJ, Zafar MA, Saeyeldin A, Ziganshin BA, Elefteriades JA. The Effect of Blood Transfusion on Outcomes in Aortic Surgery. International Journal Of Angiology 2017, 26: 135-142. PMID: 28804230, PMCID: PMC5552894, DOI: 10.1055/s-0037-1604417.Peer-Reviewed Original ResearchAortic surgeryBlood transfusionBlood productsCardiac surgeryBlood product exposureStandard of carePaucity of evidencePostoperative outcomesPatient outcomesCurrent evidenceSurgeryTransfusionLong-term eventsBeneficial effectsProduct exposureMultiple studiesOutcomesDeleterious effectsMorbidityMortalityCare
2016
Improvement in quality of lifesix months after primary total hip arthroplasty in a Pakistani population.
Zubairi AJ, Bin Mahmood SU, Ali M, Noordin S. Improvement in quality of lifesix months after primary total hip arthroplasty in a Pakistani population. Journal Of The Pakistan Medical Association 2016, 66(Suppl 3): s99-s101. PMID: 27895369.Peer-Reviewed Original ResearchConceptsTotal hip arthroplastyQuality of lifePrimary total hip arthroplastyHip arthroplastyElective primary total hip arthroplastyCore Outcome Measures IndexAga Khan University HospitalCohort studyHip scoreMost patientsMean agePatient satisfactionUniversity HospitalOrthopaedic departmentMean reductionPatientsSignificant improvementSix monthsPakistani populationAmerican SocietyArthroplastyScoresMonthsAgeDisabilityDelayed Presentation of Forgotten Thyroid Goiter - 25 Years After Thyroidectomy.
Khan FW, Muhammad A, Abbas M, Bin Mahmood SU, Fatima B, Fatimi SH. Delayed Presentation of Forgotten Thyroid Goiter - 25 Years After Thyroidectomy. Journal Of College Of Physicians And Surgeons Pakistan 2016, 26: 858-860. PMID: 27806818.Peer-Reviewed Original ResearchConceptsThyroid tissueExtra-cervical approachRemnant thyroid tissueRetrosternal thyroid massPartial sternotomyTotal thyroidectomyInitial thyroidectomyMediastinal massPatient's symptomsPressure symptomsThyroid massThyroidectomyRadiographic imagingVital structuresRare occurrenceSymptomsMass effectPatientsRecurrenceTissue