Johnny Millar

ORCID: 0000-0003-0165-3591
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About
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Research Areas
  • Congenital Heart Disease Studies
  • Cardiac Arrest and Resuscitation
  • Sepsis Diagnosis and Treatment
  • Mechanical Circulatory Support Devices
  • Emergency and Acute Care Studies
  • Cardiac, Anesthesia and Surgical Outcomes
  • Respiratory Support and Mechanisms
  • Neonatal Respiratory Health Research
  • Cardiac Structural Anomalies and Repair
  • Intensive Care Unit Cognitive Disorders
  • COVID-19 Clinical Research Studies
  • Hemodynamic Monitoring and Therapy
  • interferon and immune responses
  • Anesthesia and Neurotoxicity Research
  • Infant Development and Preterm Care
  • Heart Failure Treatment and Management
  • SARS-CoV-2 and COVID-19 Research
  • Childhood Cancer Survivors' Quality of Life
  • COVID-19 and healthcare impacts
  • Global Maternal and Child Health
  • Kawasaki Disease and Coronary Complications
  • Renal function and acid-base balance
  • Delphi Technique in Research
  • Ultrasound in Clinical Applications
  • Cardiovascular Issues in Pregnancy

Royal Children's Hospital
2016-2025

Murdoch Children's Research Institute
2016-2024

Australian and New Zealand Intensive Care Society
2018-2023

University of Edinburgh
2022-2023

The University of Melbourne
2013-2023

Roslin Institute
2022-2023

Eastern Health
2023

Intensive Care Society
2023

University of Zurich
2022

Osaka University
2020

Athanasios Kousathanas Erola Pairo‐Castineira Konrad Rawlik A. Stuckey Christopher A. Odhams and 95 more Susan Walker Clark D Russell Tomas Malinauskas Yang Wu Jonathan Millar Xia Shen Katherine S. Elliott Fiona Griffiths Wilna Oosthuyzen Kirstie Morrice Seán Keating Bo Wang Daniel R. Rhodes Lucija Klarić Marie Zechner Nick Parkinson Afshan Siddiq Peter Goddard Sally Donovan David M. Maslove Alistair Nichol Malcolm G. Semple Tala Zainy F. Maleady-Crowe Linda Todd Shahla Salehi Julian C. Knight Greg Elgar G. C. Chan Prabhu Arumugam Christine Patch Augusto Rendon David Bentley Clare Kingsley Jack A. Kosmicki Julie Horowitz Aris Baras Gonçalo R. Abecasis Manuel A. R. Ferreira Anne E. Justice Tooraj Mirshahi Matthew T. Oetjens Daniel J. Rader Marylyn D. Ritchie Anurag Verma Tom Fowler Manu Shankar‐Hari Charlotte Summers Charles Hinds Peter Horby Lowell Ling Daniel F. McAuley Hugh Montgomery Peter Openshaw Paul Elliott Timothy Walsh Albert Tenesa J. Kenneth Baillie Colin B. Begg Sara Clohisey Charles Hinds Peter Horby Julian C. Knight Lowell Ling David M. Maslove Daniel F. McAuley Johnny Millar Hugh Montgomery Alistair Nichol Peter Openshaw Alexandre C. Pereira Chris P. Ponting Kathy Rowan Malcolm G. Semple Manu Shankar‐Hari Charlotte Summers Timothy Walsh Latha Aravindan Ruth Armstrong Heather Biggs Ceilia Boz Adam Brown Richard E. Clark Audrey Coutts J. Terrence Coyle Louise Cullum Sukamal Das Nicky Day Lorna Donnelly Esther Duncan Angie Fawkes Paul Finernan Max Head Fourman Anita Furlong James Furniss

Abstract Critical COVID-19 is caused by immune-mediated inflammatory lung injury. Host genetic variation influences the development of illness requiring critical care 1 or hospitalization 2–4 after infection with SARS-CoV-2. The GenOMICC (Genetics Mortality in Care) study enables comparison genomes from individuals who are critically ill those population controls to find underlying disease mechanisms. Here we use whole-genome sequencing 7,491 compared 48,400 discover and replicate 23...

10.1038/s41586-022-04576-6 article EN cc-by Nature 2022-03-07

Objectives To assess the capacity of intensive care units (ICUs) in Australia to respond expected increase demand associated with COVID-19. Design Analysis Australian and New Zealand Intensive Care Society (ANZICS) registry data, supplemented by an ICU surge capability survey veterinary facilities (both March 2020). Settings All ICUs facilities. Main outcome measures Baseline numbers beds, ventilators, dialysis machines, extracorporeal membrane oxygenation intravenous infusion pumps, staff...

10.5694/mja2.50596 article EN The Medical Journal of Australia 2020-04-19

<h3>Importance</h3> Identification of potential indirect outcomes associated with the COVID-19 pandemic in pediatric population may be essential for understanding challenges current global public health crisis children and adolescents. <h3>Objective</h3> To investigate whether SARS-CoV-2 outbreak subsequent effective measures Australia were an increase admissions to intensive care units (ICUs) adolescents deliberate self-harm (DSH). <h3>Design, Setting, Participants</h3> This national,...

10.1001/jamanetworkopen.2022.11692 article EN cc-by-nc-nd JAMA Network Open 2022-05-11

Monitoring healthcare quality is challenging in paediatric critical care due to measure variability, data collection burden, and uncertainty regarding consumer clinician priorities. We sought establish a core set that (i) meaningful consumers clinicians (ii) promotes alignment of use across care. conducted multi-stakeholder Delphi study with embedded prioritisation survey. The involved two surveys, followed by consensus meeting. Triangulation methods were used integrate survey findings prior...

10.1016/j.ccrj.2024.01.002 article EN cc-by-nc-nd Critical Care and Resuscitation 2024-03-25

We aimed to determine the effect of elective left heart decompression at time initiation central venoarterial extracorporeal membrane oxygenation (VA ECMO) on VA ECMO duration and clinical outcomes in children a single tertiary referral center with large pediatric population from national for cardiac surgery. studied 51 episodes historical cohort 49 patients treated between years 1990 2013 Paediatric Intensive Care Unit (PICU) Royal Children's Hospital, Melbourne. The cases had variety...

10.1111/aor.12390 article EN Artificial Organs 2014-10-20

Objective: Outcomes for children with chronic critical illness are not defined. We examined the long-term survival of these in Australia and New Zealand. Design: All cases PICU length stay more than 28 days age 16 years old or younger Zealand from 2000 to 2011 were studied. Five-year was analyzed using Kaplan-Meir estimates, risk factors mortality evaluated Cox regression. Setting: PICUs Patients: Nine hundred twenty-four illness. Intervention: None. Measurements Main Results: admitted...

10.1097/ccm.0000000000001076 article EN Critical Care Medicine 2015-05-09

Objectives To describe the short term ability of Australian intensive care units (ICUs) to increase capacity in response heightened demand caused by COVID-19 pandemic. Design Survey ICU directors or delegated senior clinicians (disseminated 30 August 2021), supplemented and New Zealand Intensive Care Society (ANZICS) registry data. Setting All 194 public private ICUs. Main outcome measures Numbers currently available potentially beds case a surge; levels ICU-relevant equipment staff. Results...

10.5694/mja2.51318 article EN The Medical Journal of Australia 2021-10-13

Major postintensive care sequelae affect up to one in three adult survivors of critical illness. Large cohorts on educational outcomes after pediatric intensive are lacking. We assessed primary school a statewide cohort children who survived PICU during childhood.Multicenter population-based study less than 5 years admitted PICU. Using the National Assessment Program-Literacy and Numeracy database, outcome was achievement below Minimum Standard (NMS) year 3 school. Cases were compared with...

10.1097/ccm.0000000000005461 article EN cc-by-nc-nd Critical Care Medicine 2022-02-16

In 2023, the Australian and New Zealand Intensive Care Society (ANZICS) Registry run by Centre for Outcomes Resources Evaluation (CORE) turns 30 years old. It began with Adult Patient Database, Paediatric Registry, Critical it now includes Central Line Associated Bloodstream Infections Extra-Corporeal Membrane Oxygenation Health Information System. The ANZICS provides comparative case-mix reports, risk-adjusted clinical outcomes, process measures, quality of care indicators to over 200...

10.1016/j.ccrj.2023.04.009 article EN cc-by-nc-nd Critical Care and Resuscitation 2023-03-01

The capacity and limitations of ventricular assist device (VAD) support in single-ventricle physiology remains poorly understood. We aimed to review our experience the use VAD circulation determine its feasibility this population.We reviewed with patients single ventricles over past 25 years. Fifty-seven received 64 runs between 1990 2015 at a median age 13 days [interquartile range (IQR) 4.1-99.4 days], which 55 were supported for post-cardiotomy failure. majority short-term support, while...

10.1093/icvts/ivx066 article EN Interactive Cardiovascular and Thoracic Surgery 2017-05-05

Importance Children with congenital heart defects who undergo cardiopulmonary bypass (CPB) surgery are at risk for delayed or impaired neurodevelopmental outcomes. Nitric oxide (NO) added to the CPB oxygenator may reduce systemic inflammation due and improve recovery from surgery, including improved Objective To investigate neurodevelopment, health-related quality of life (HRQOL), factors associated neurodevelopment 12 months post in infants received NO standard CPB. Design, Setting,...

10.1001/jamanetworkopen.2024.58040 article EN cc-by-nc-nd JAMA Network Open 2025-02-05

Abstract Objectives To investigate the influence of non‐medical social determinants health on rates admission and outcomes for children admitted to intensive care units (ICUs) in Australia. Study design Retrospective cohort study; analysis Australian New Zealand Paediatric Intensive Care Registry data. Setting, participants Children (18 years or younger) ICUs during 1 January 2013 – 31 December 2020. Main outcome measures Population‐standardised ICU rates, overall by residential...

10.5694/mja2.52643 article EN cc-by-nc-nd The Medical Journal of Australia 2025-04-08

Objectives: To assess the feasibility, safety, and efficacy of a sedation protocol using dexmedetomidine as primary sedative in mechanically ventilated critically ill children. Design: Open-label, pilot, prospective, multicenter, randomized, controlled trial. The outcome was proportion scores target range first 48 hours. Safety outcomes included device removal, adverse events, vasopressor use. Feasibility time to randomization fidelity. Setting: Six tertiary PICUs Australia New Zealand....

10.1097/pcc.0000000000002483 article EN Pediatric Critical Care Medicine 2020-07-28
Jannik Boos Caspar I. van der Made Gayatri Ramakrishnan Eamon Coughlan Rosanna Asselta and 95 more Britt-Sabina Löscher Luca Valenti Rafael de Cid Luis Bujanda Antonio Julià Erola Pairo-Castineira J. Kenneth Baillie Sandra May Berina Zametica Julia Heggemann Agustı́n Albillos Jesus M. Banales Jordi Barretina Natalia Blay Paolo Bonfanti Maria Buti Javier Fernandez Sara Marsal Daniele Prati Luisa Ronzoni Nicoletta Sacchi Valeria Rimoldi Elvezia Maria Paraboschi Alessandra Bandera Flora Peyvandi Giacomo Grasselli Francesco Blasi Francesco Malvestiti Serena Pelusi Cristiana Bianco Lorenzo Miano Angela Lombardi Pietro Invernizzi Alessio Gerussi Giuseppe Citerio Andrea Biondi Maria Grazia Valsecchi Marina Elena Cazzaniga Giuseppe Foti Ilaria Beretta Mariella D’Angiò Laura Rachele Bettini Xavier Farré Susana Iraola‐Guzmán Manolis Kogevinas Gemma Castaño‐Vinyals Koldo García‐Etxebarria Beatriz Nafría Jiménez Mauro D’Amato Adriana Palom Colin B. Begg Sara Clohisey Charles Hinds Peter Horby Julian C. Knight Lowell Ling David M. Maslove Daniel F. McAuley Johnny Millar Hugh Montgomery Alistair Nichol Peter Openshaw Alexandre C. Pereira Chris P. Ponting Kathy Rowan Malcolm G. Semple Manu Shankar‐Hari Charlotte Summers Timothy Walsh J. Kenneth Baillie Latha Aravindan Ruth Armstrong Heather Biggs Ceilia Boz Adam Brown Richard E. Clark Sara Clohisey Audrey Coutts J. Terrence Coyle Louise Cullum Sukamal Das Nicky Day Lorna Donnelly Esther Duncan Angie Fawkes Paul Fineran Max Head Fourman Anita Furlong James Furniss Bernadette Gallagher Tammy Gilchrist Ailsa Golightly Fiona Griffiths Katarzyna Hafezi Debbie Hamilton

Despite extensive global research into genetic predisposition for severe COVID-19, knowledge on the role of rare host variants and their relation to other risk factors remains limited. Here, 52 genes with prior etiological evidence were sequenced in 1,772 COVID-19 cases 5,347 population-based controls from Spain/Italy. Rare deleterious TLR7 present 2.4% young (<60 years) no reported clinical (n = 378), compared 0.24% (odds ratio [OR] 12.3, p 1.27 × 10

10.1016/j.xhgg.2024.100323 article EN cc-by-nc-nd Human Genetics and Genomics Advances 2024-06-28

Despite the challenges posed by vast geographical distances and relatively small populations (Australia: 26 million, New Zealand: 5 million), Australia Zealand (ANZ) are renowned for their high quality innovative pediatric intensive care research. A strong culture of partnership across units led to formation ANZ Intensive Care Society Paediatric Study Group (ANZICS PSG) in 2003, which has evolved since its into one leading international trial networks, along with two United States (1,2)...

10.1097/pcc.0000000000003653 article EN cc-by-nc-nd Pediatric Critical Care Medicine 2024-12-17

To determine the cardiovascular tolerance of clonidine used as a first-line sedative after cardiac surgery in small infants.Retrospective chart review.A tertiary and quaternary referral PICU.All infants younger than 2 months who received infusion for sedation from October 2011 to July 2013.None.Heart rate, blood pressure, central venous left atrial vasoactive inotropic score, volume fluid bolus, lactate mixed saturation were assessed. Preinfusion values compared with postinfusion values. Of...

10.1097/pcc.0000000000000672 article EN Pediatric Critical Care Medicine 2016-02-25
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