World's Best Scientists 2026 revealed!
R. Loch Macdonald

R. Loch Macdonald

D-Index & Metrics

Medicine

D-Index
110
Citations
52606
World Ranking
5483
National Ranking
213

R. Loch Macdonald publication distribution in Medicine in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Medicine in 2026. The highlighted bar marks where R. Loch Macdonald sits on this spectrum.

101–120 publications: 5 scientists 121–140 publications: 26 scientists 141–160 publications: 73 scientists 161–180 publications: 155 scientists 181–200 publications: 230 scientists 201–220 publications: 363 scientists 221–240 publications: 487 scientists 241–260 publications: 545 scientists 261–280 publications: 722 scientists 281–300 publications: 768 scientists 301–320 publications: 834 scientists 321–340 publications: 895 scientists 341–360 publications: 922 scientists 361–380 publications: 838 scientists 381–400 publications: 861 scientists 401–420 publications: 918 scientists 421–440 publications: 806 scientists 441–460 publications: 771 scientists 461–480 publications: 751 scientists 481–500 publications: 713 scientists 501–520 publications: 617 scientists 521–540 publications: 611 scientists 541–560 publications: 537 scientists 561–580 publications: 504 scientists 581–600 publications: 509 scientists 601–620 publications: 396 scientists 621–640 publications: 386 scientists 641–660 publications: 371 scientists 661–680 publications: 340 scientists 681–700 publications: 336 scientists 701–720 publications: 307 scientists 721–740 publications: 259 scientists 741–760 publications: 230 scientists 761–780 publications: 228 scientists 781–800 publications: 217 scientists 801–820 publications: 204 scientists 821–840 publications: 186 scientists 841–860 publications: 177 scientists 861–880 publications: 155 scientists 881–900 publications: 139 scientists 901–920 publications: 145 scientists 921–940 publications: 116 scientists 941–960 publications: 133 scientists 961–980 publications: 91 scientists 981–1,000 publications: 96 scientists 1,001–1,020 publications: 77 scientists 1,021–1,040 publications: 70 scientists 1,041–1,060 publications: 63 scientists 1,061–1,080 publications: 77 scientists 1,081–1,100 publications: 49 scientists 1,101–1,120 publications: 54 scientists 1,121–1,140 publications: 49 scientists 1,141–1,160 publications: 51 scientists 1,161–1,180 publications: 35 scientists 1,181–1,200 publications: 39 scientists 1,201–1,220 publications: 26 scientists 1,221–1,240 publications: 37 scientists 1,241–1,260 publications: 36 scientists 1,261–1,280 publications: 27 scientists 1,281–1,300 publications: 32 scientists 1,301–1,320 publications: 28 scientists 1,321–1,340 publications: 17 scientists 1,341–1,360 publications: 30 scientists 1,361–1,380 publications: 28 scientists 1,381–1,400 publications: 17 scientists 1,401–1,420 publications: 21 scientists 1,421–1,440 publications: 15 scientists 1,441–1,460 publications: 12 scientists 1,461–1,480 publications: 12 scientists 1,481–1,500 publications: 18 scientists 1,501–1,520 publications: 14 scientists 1,521–1,540 publications: 17 scientists 1,541–1,560 publications: 15 scientists 1,561–1,580 publications: 6 scientists 1,581–1,600 publications: 2 scientists 1,601–1,620 publications: 12 scientists 1,621–1,640 publications: 11 scientists 1,641–1,660 publications: 8 scientists 1,661–1,680 publications: 5 scientists 1,681–1,700 publications: 5 scientists 1,701–1,720 publications: 10 scientists 1,721–1,740 publications: 12 scientists 1,741–1,760 publications: 14 scientists 1,761–1,780 publications: 6 scientists 1,781–1,795 publications: 5 scientists 1,796+ publications: 100 scientists
101 publications 1,796+

This scientist: 709 publications — 82nd percentile

82% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,796 publications or more.

R. Loch Macdonald D-index placement in Medicine in 2026

The chart shows the D-index (discipline H-index) distribution of Medicine scientists ranked by Research.com in 2026. The highlighted bar marks where R. Loch Macdonald sits on this spectrum.

70–71 D-Index: 226 scientists 72–73 D-Index: 391 scientists 74–75 D-Index: 574 scientists 76–77 D-Index: 730 scientists 78–79 D-Index: 891 scientists 80–81 D-Index: 972 scientists 82–83 D-Index: 1,027 scientists 84–85 D-Index: 1,003 scientists 86–87 D-Index: 960 scientists 88–89 D-Index: 970 scientists 90–91 D-Index: 922 scientists 92–93 D-Index: 839 scientists 94–95 D-Index: 808 scientists 96–97 D-Index: 779 scientists 98–99 D-Index: 668 scientists 100–101 D-Index: 611 scientists 102–103 D-Index: 630 scientists 104–105 D-Index: 513 scientists 106–107 D-Index: 541 scientists 108–109 D-Index: 445 scientists 110–111 D-Index: 429 scientists 112–113 D-Index: 400 scientists 114–115 D-Index: 393 scientists 116–117 D-Index: 318 scientists 118–119 D-Index: 302 scientists 120–121 D-Index: 287 scientists 122–123 D-Index: 255 scientists 124–125 D-Index: 256 scientists 126–127 D-Index: 252 scientists 128–129 D-Index: 230 scientists 130–131 D-Index: 179 scientists 132–133 D-Index: 168 scientists 134–135 D-Index: 163 scientists 136–137 D-Index: 159 scientists 138–139 D-Index: 134 scientists 140–141 D-Index: 134 scientists 142–143 D-Index: 118 scientists 144–145 D-Index: 109 scientists 146–147 D-Index: 106 scientists 148–149 D-Index: 74 scientists 150–151 D-Index: 79 scientists 152–153 D-Index: 80 scientists 154–155 D-Index: 87 scientists 156–157 D-Index: 57 scientists 158–159 D-Index: 74 scientists 160–161 D-Index: 69 scientists 162–163 D-Index: 60 scientists 164–165 D-Index: 53 scientists 166–167 D-Index: 39 scientists 168–169 D-Index: 42 scientists 170–171 D-Index: 32 scientists 172–173 D-Index: 39 scientists 174–175 D-Index: 40 scientists 176–177 D-Index: 28 scientists 178–179 D-Index: 19 scientists 180–181 D-Index: 23 scientists 182–183 D-Index: 31 scientists 184–185 D-Index: 18 scientists 186–187 D-Index: 20 scientists 188–189 D-Index: 22 scientists 190–191 D-Index: 13 scientists 192–193 D-Index: 21 scientists 194–195 D-Index: 12 scientists 196–197 D-Index: 12 scientists 198–199 D-Index: 14 scientists 200–201 D-Index: 15 scientists 202–203 D-Index: 13 scientists 204–205 D-Index: 10 scientists 206–207 D-Index: 8 scientists 208–209 D-Index: 4 scientists 210–211 D-Index: 12 scientists 212–213 D-Index: 11 scientists 214–215 D-Index: 10 scientists 216 D-Index: 4 scientists 217+ D-Index: 98 scientists
70 D-Index 217+

This scientist: 110 D-Index — 73rd percentile

73% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 217 D-Index or more.

Overview

R. Loch Macdonald is a researcher affiliated with the University of Toronto in Canada, specializing primarily in medicine with a focus on neurology. Their scholarly work extensively covers topics related to intracranial aneurysms, traumatic brain injury, neurosurgical procedures, vascular malformations, cerebrospinal fluid disorders, and cerebrovascular diseases.

Their research spans several subfields including neurology, cellular and molecular neuroscience, pulmonary and respiratory medicine, cardiology and cardiovascular medicine, and oncology. This multidisciplinary approach reflects the complex nature of the clinical conditions studied.

Macdonald's recent publications highlight ongoing contributions to understanding subarachnoid hemorrhage and related cerebrovascular conditions. Notable papers include:

  • "Aneurysmal Subarachnoid Hemorrhage: the Last Decade" (2020), published in Translational Stroke Research
  • "Treatment of Spontaneous Subarachnoid Hemorrhage" (2020), published in Stroke
  • "Single-Dose Intraventricular Nimodipine Microparticles Versus Oral Nimodipine for Aneurysmal Subarachnoid Hemorrhage" (2020), published in Stroke
  • "Role of perivascular and meningeal macrophages in outcome following experimental subarachnoid hemorrhage" (2021), published in Journal of Cerebral Blood Flow & Metabolism
  • "Rethinking the initial changes in subarachnoid haemorrhage: Focusing on real-time metabolism during early brain injury" (2022), published in EBioMedicine

Frequent collaborators in Macdonald's research include Sean N. Neifert, Michael L. Martini, J Mocco, Nima Etminan, and José I. Suárez. These coauthors have each contributed to multiple publications alongside Macdonald, supporting a cohesive research network.

Macdonald's work is frequently published in several key journals in the neuroscience and neurosurgery domain. The most frequent publication venues are:

  • Stroke
  • Neurosurgery
  • Neurocritical Care
  • World Neurosurgery
  • bioRxiv (Cold Spring Harbor Laboratory)

The main topics addressed in Macdonald's studies include:

  • Intracranial Aneurysms: Treatment and Complications
  • Traumatic Brain Injury and Neurovascular Disturbances
  • Neurosurgical Procedures and Complications
  • Vascular Malformations Diagnosis and Treatment
  • Cerebrospinal fluid and hydrocephalus
  • Intracerebral and Subarachnoid Hemorrhage Research
  • Cerebrovascular and Carotid Artery Diseases

Best Publications

  • Guidelines for the Management of Spontaneous Intracerebral Hemorrhage. A Guideline for Healthcare Professionals From the American Heart Association/American Stroke Association

    J. Claude Hemphill;Steven M. Greenberg;Craig S. Anderson;Kyra Becker

  • Guidelines for the Management of Spontaneous Intracerebral Hemorrhage

    Lewis B. Morgenstern;J. Claude Hemphill;Craig Anderson;Kyra Becker

  • Definition of Delayed Cerebral Ischemia After Aneurysmal Subarachnoid Hemorrhage as an Outcome Event in Clinical Trials and Observational Studies Proposal of a Multidisciplinary Research Group

    Mervyn D.I. Vergouwen;Marinus Vermeulen;Jan van Gijn;Gabriel J.E. Rinkel

  • Spontaneous subarachnoid haemorrhage

    R Loch Macdonald;R Loch Macdonald;Tom A Schweizer;Tom A Schweizer

  • It's Time to Revise the Definition of Status Epilepticus

    Daniel H. Lowenstein;Thomas P Bleck;Robert L. Macdonald

  • Cognitive and Functional Outcome After Aneurysmal Subarachnoid Hemorrhage

    Timour Al-Khindi;R. Loch Macdonald;Tom A. Schweizer

  • Prediction of symptomatic vasospasm after subarachnoid hemorrhage: the modified fisher scale.

    Jennifer A. Frontera;Jan Claassen;J. Michael Schmidt;Katja E. Wartenberg

  • Clazosentan to overcome neurological ischemia and infarction occurring after subarachnoid hemorrhage (CONSCIOUS-1): randomized, double-blind, placebo-controlled phase 2 dose-finding trial.

    R. Loch Macdonald;Neal F. Kassell;Stephan Mayer;Daniel Ruefenacht

  • Delayed neurological deterioration after subarachnoid haemorrhage

    R. Loch Macdonald

  • Clazosentan, an endothelin receptor antagonist, in patients with aneurysmal subarachnoid haemorrhage undergoing surgical clipping: a randomised, double-blind, placebo-controlled phase 3 trial (CONSCIOUS-2)

    R Loch Macdonald;Randall T Higashida;Emanuela Keller;Stephan A Mayer

  • Prognostic Factors for Outcome in Patients With Aneurysmal Subarachnoid Hemorrhage

    Axel J. Rosengart;Kim E. Schultheiss;Jocelyn Tolentino;R. Loch Macdonald

  • Enhanced neurosteroid potentiation of ternary GABA(A) receptors containing the delta subunit

    Kai M. Wohlfarth;Matt T. Bianchi;Robert L. Macdonald

  • Extrasynaptic GABAA Receptors: Form, Pharmacology, and Function

    Delia Belelli;Neil L. Harrison;Jamie Maguire;Robert L. Macdonald

  • Cerebral vasospasm following subarachnoid hemorrhage: time for a new world of thought.

    Ryszard M. Pluta;Jacob Hansen-Schwartz;Jens Dreier;Peter Vajkoczy

  • Rapid Seizure-Induced Reduction of Benzodiazepine and Zn2+ Sensitivity of Hippocampal Dentate Granule Cell GABAA Receptors

    Jaideep Kapur;Robert L. Macdonald

  • Cerebral vasospasm after subarachnoid hemorrhage: the emerging revolution.

    R Loch Macdonald;Ryszard M Pluta;John H Zhang

  • Differential regulation of γ-aminobutyric acid receptor channels by diazepam and phenobarbital

    Roy E. Twyman;Carl J. Rogers;Robert L. Macdonald

  • GABRD encoding a protein for extra- or peri-synaptic GABAA receptors is a susceptibility locus for generalized epilepsies

    Leanne M. Dibbens;Hua-Jun Feng;Michaella C. Richards;Louise A. Harkin

  • Safety and efficacy of NA-1 in patients with iatrogenic stroke after endovascular aneurysm repair (ENACT): a phase 2, randomised, double-blind, placebo-controlled trial

    Michael D Hill;Renee H Martin;David Mikulis;John H Wong

  • Subarachnoid hemorrhage grading scales: a systematic review.

    David S. Rosen;R. Loch MacDonald

Frequent Co-Authors

Tom A. Schweizer
Tom A. Schweizer St. Michael's Hospital
Bryce Weir
Bryce Weir University of Chicago
Stephan A. Mayer
Stephan A. Mayer New York Medical College
James C. Torner
James C. Torner University of Iowa
Neal F. Kassell
Neal F. Kassell Focused Ultrasound Foundation
Andreas Raabe
Andreas Raabe University of Bern
Michael M. Todd
Michael M. Todd University of Minnesota
Peter Vajkoczy
Peter Vajkoczy Charité - University Medicine Berlin
Gustavo Saposnik
Gustavo Saposnik University of Toronto
E. Sander Connolly
E. Sander Connolly Columbia University

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