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Home • Specialist • Dr Gwilym Morris

Electrophysiologist in NSW

Biography

Dr Gwilym Morris is a Consultant Cardiologist and Cardiac Electrophysiologist with special interests in heart rhythm disorders, particularly the research of atrial fibrillation, sinus node disease, and arrhythmias in athletes.

Dr Morris completed his undergraduate medical training at the University of Oxford and was awarded a Wellcome Trust scholarship to conduct research before starting clinical training. He then completed his postgrad Read More...

Procedures & Conditions

Procedures Performed
  • Atrial Fibrillation Ablation
  • Complex Arrhythmia Ablation
  • SVT Ablation
  • VT Ablation
  • ICD (Defibrillator) Implantation
  • Pacemaker Implantation
  • Loop Recorder Implantation
  • Ambulatory ECG
  • Ambulatory Blood Pressure Recording
  • ECG
Conditions Treated
  • Atrial Fibrillation
  • Sinus Node Disease
  • Arrhythmias
  • Sick Sinus Syndrome
  • Supraventricular Tachycardia (SVT)
  • Ventricular Tachycardia (VT)

Experience

  • Staff Specialist Cardiology (Cardiac Electrophysiology and Devices)
    John Hunter Hospital 2022 - Present
  • Conjoint Senior Lecturer
    University of Newcastle 2022 - Present
  • Consultant in Cardiac Electrophysiology and Devices
    Manchester UK 2015 - 2022
  • Honorary Clinical Lecturer
    University of Manchester 2014 - Present

Memberships & Awards

Professional Memberships and Affiliations

  • Royal Australasian College of Physicians (RACP)

  • Royal College of Physicians of Edinburgh

Awards
  • 2012

    British Society of Cardiovascular Research, Young Investigator Award, Runner up

  • 2011

    Heart Rhythm UK, Young Investigator Award, Winner

  • 2010

    Turnberg Cup (clinical academic trainees award), University of Manchester

  • 2010

    AstraZeneca, Clinical Research Prize runner up

  • 2009

    University of Manchester School of Clinical and Laboratory Sciences Research Showcase. Poster presentation 2nd prize

  • 1998

    Andrew Hopley Prize, University of Oxford. (Best research dissertation)

  • 1998

    Wellcome Trust Scholarship, for vacation research

  • 1996/1997

    St Edmund Hall, University of Oxford. Open scholarship for academic achievement

  • 1994/1995

    Stockport Grammar School Science Prize

Research & Publications

Publications

1. Dwivedi, Jovita & Brienesse, Stephen & Morris, Gwilym & Leitch, James & Collins, Nicholas & Jackson, Nick. (2022). Cardiac Resynchronisation Therapy in a patient with Ebstein’s Anomaly and Left Ventricular noncompaction: Rethink the Resync?. HeartRhythm Case Reports. 8. 10.1016/j.hrcr.2022.09.007.

2. Bates, A & Naseer, MZ & Taylor, M & Denham, N & Yue, A & Das, Moloy & Morris, Gwilym & Ullah, Waseem. (2022). UK multi-centre retrospective study of the learning curve and relative performance of the rhythmia high density mapping system for atrial ablation. EP Europace. 24. 10.1093/europace/euac053.071.

3. Saraf, Karan & Black, Nicholas & Garratt, Clifford & Muhyaldeen, Sahrkaw & Morris, Gwilym. (2022). Local impedance-guided ablation and ultra-high density mapping versus conventional or contact force-guided ablation with mapping for treatment of cavotricuspid isthmus dependent atrial flutter. Indian Pacing and Electrophysiology Journal. 4. 10.1016/j.ipej.2022.03.004.

5. Bruce, Charo & Saraf, Karan & Rogers, Steven & El-Omar, Magdi & Kirkwood, Graeme & Kelland, Nicholas & Shah, Dinakshi & Chalil, Shajil & Fullwood, Catherine & Wright, Matthew & Jamil-Copley, Shahnaz & Fox, David & Abozguia, Khalid & Thachil, Jecko & McCollum, Charles & Morris, Gwilym. (2022). Deep Vein Thrombosis is Common After Cardiac Ablation and Pre-Procedural D-Dimer Could Predict Risk. Heart, lung & circulation. 31. 10.1016/j.hlc.2022.01.014.

6. Saraf, Karan & Morris, Gwilym. (2022). Left Atrial Appendage Closure: What the Evidence Does and Does Not Reveal-A View from the Outside. Interventional Cardiology Clinics. 11. 10.1016/j.iccl.2021.11.009.

7. Ferreira, David & Dwivedi, J. & Brienesse, Stephen & Leitch, J. & Sy, Raymond & Chan, K. & Thomas, S. & Singarayar, S. & Morris, Gwilym & Jackson, Nick. (2022). The Progression of Atrial Substrate in Patients with Recurrent Left Atrial Ablation Procedures. Heart, Lung and Circulation. 31. S134-S135. 10.1016/j.hlc.2022.06.201.

8. Black, Nicholas & Mohammad, Fahad & Saraf, Karan & Morris, Gwilym. (2021). Endothelial function and atrial fibrillation: A missing piece of the puzzle?. Journal of Cardiovascular Electrophysiology. 33. 10.1111/jce.15277.

9. Boyett, Mark & Yanni, Joseph & Tellez, James & Bucchi, Annalisa & Mesirca, Pietro & Cai, Xue & Logantha, Sunil Jit & Wilson, Claire & Anderson, Cali & Ariyaratnam, Jonathan & Stuart, Luke & Nakao, Shu & Abd Allah, Eman & Jones, Sandra & Lancaster, Matthew & Stephenson, Robert & Chandler, Natalie & Smith, Matthew & Bussey, Carol & D’Souza, Alicia. (2021). Regulation of sinus node pacemaking and atrioventricular node conduction by HCN channels in health and disease. Progress in Biophysics and Molecular Biology. 166. 10.1016/j.pbiomolbio.2021.06.008.

10. Mesirca, Pietro & Nakao, Shu & Nissen, Sarah & Forte, Gabriella & Anderson, Cali & Trussell, Tariq & Li, Jue & Cox, Charlotte & Zi, Min & Logantha, Sunil Jit & Yaar, Sana & Carstensen, Helena & Bidaud, Isabelle & Stuart, Luke & Soattin, Luca & Morris, Gwilym & Martins, Paula & Cartwright, Elizabeth & Oceandy, Delvac & D’Souza, Alicia. (2021). Intrinsic Electrical Remodeling Underlies Atrioventricular Block in Athletes. Circulation Research. 129. 10.1161/CIRCRESAHA.119.316386.

11. Borbas, Zoltan & Ph.D, Halina & Soattin, Luca & Caldwell, Jane & Prendergast, Brian & Vohra, Akbar & Saeed, Yawer & Hoschtitzky, Andreas & Yanni, Joseph & Atkinson, Andrew & Logantha, Sunil Jit & Borbas, Balint & Garratt, Clifford & Morris, Gwilym. (2021). Structural and Functional Properties of Subsidiary Atrial Pacemakers in a Goat Model of Sinus Node Disease. Frontiers in Physiology. 12. 82. 10.3389/fphys.2021.592229.

12. Saraf, Karan & Black, Nicholas & Garratt, Clifford & Muhyaldeen, Sahrkaw & Morris, Gwilym. (2021). Local impedance and ultra-high density 3-dimensional mapping results in improved ablation metrics for cavotricuspid isthmus dependent atrial flutter compared with conventional ablation and contact force-guided ablation with 3-dimensional mapping. 10.22541/au.161059228.84651699/v1.

13. Black, Nicholas & Mohammad, Fahad & Saraf, Karan & Morris, Gwilym. (2021). Endothelial function and atrial fibrillation: A missing piece of the puzzle?. Journal of Cardiovascular Electrophysiology. 33. 10.1111/jce.15277.

14. Boyett, Mark & Yanni, Joseph & Tellez, James & Bucchi, Annalisa & Mesirca, Pietro & Cai, Xue & Logantha, Sunil Jit & Wilson, Claire & Anderson, Cali & Ariyaratnam, Jonathan & Stuart, Luke & Nakao, Shu & Abd Allah, Eman & Jones, Sandra & Lancaster, Matthew & Stephenson, Robert & Chandler, Natalie & Smith, Matthew & Bussey, Carol & D’Souza, Alicia. (2021). Regulation of sinus node pacemaking and atrioventricular node conduction by HCN channels in health and disease. Progress in Biophysics and Molecular Biology. 166. 10.1016/j.pbiomolbio.2021.06.008.

15. Mesirca, Pietro & Nakao, Shu & Nissen, Sarah & Forte, Gabriella & Anderson, Cali & Trussell, Tariq & Li, Jue & Cox, Charlotte & Zi, Min & Logantha, Sunil Jit & Yaar, Sana & Carstensen, Helena & Bidaud, Isabelle & Stuart, Luke & Soattin, Luca & Morris, Gwilym & Martins, Paula & Cartwright, Elizabeth & Oceandy, Delvac & D’Souza, Alicia. (2021). Intrinsic Electrical Remodeling Underlies Atrioventricular Block in Athletes. Circulation Research. 129. 10.1161/CIRCRESAHA.119.316386.

16. Borbas, Zoltan & Ph.D, Halina & Soattin, Luca & Caldwell, Jane & Prendergast, Brian & Vohra, Akbar & Saeed, Yawer & Hoschtitzky, Andreas & Yanni, Joseph & Atkinson, Andrew & Logantha, Sunil Jit & Borbas, Balint & Garratt, Clifford & Morris, Gwilym. (2021). Structural and Functional Properties of Subsidiary Atrial Pacemakers in a Goat Model of Sinus Node Disease. Frontiers in Physiology. 12. 82. 10.3389/fphys.2021.592229.

17. Saraf, Karan & Black, Nicholas & Garratt, Clifford & Muhyaldeen, Sahrkaw & Morris, Gwilym. (2021). Local impedance and ultra-high density 3-dimensional mapping results in improved ablation metrics for cavotricuspid isthmus dependent atrial flutter compared with conventional ablation and contact force-guided ablation with 3-dimensional mapping. 10.22541/au.161059228.84651699/v1.

18. Wong, Geoffrey & Nalliah, C. & Lee, Geoffrey & Voskoboinik, Alex & Prabhu, Sandeep & Parameswaran, Ramanathan & Sugumar, Hariharan & Al-kaisey, Ahmed & Anderson, Robert & Mclellan, Alex & Ling, Liang-Han & Morris, Gwilym & Sanders, Prashanthan & Kistler, Peter & Kalman, J.. (2020). 255 Sinus Node Remodelling in Atrial Fibrillation: Insights from High Density Mapping. Heart, Lung and Circulation. 29. S148. 10.1016/j.hlc.2020.09.262.

19. Saraf, Karan & Kumar, Narendra & Morris, Gwilym. (2020). ULTRA-HIGH DENSITY ELECTROANATOMIC MAPPING AND LOCAL IMPEDANCE-GUIDED ABLATION: A MORE ACCURATE AND EFFICIENT ABLATION STRATEGY FOR CAVOTRICUSPID ISTHMUS DEPENDENT ATRIAL FLUTTER?. Heart. 10.1136/heartjnl-2020-BCS.66.

20. Parameswaran, Ramanathan & Lee, Geoffrey & Morris, Gwilym & Royse, Alistair & Goldblatt, John & Larobina, Marco & Watts, Troy & Nalliah, Chrishan & Wong, Geoffrey & Al-kaisey, Ahmed & Anderson, Robert & Voskoboinik, Alex & Sugumar, Hariharan & Chieng, David & Sanders, Prashanthan & Kistler, Peter & Kalman, Jonathan. (2020). Simultaneous epicardial-endocardial mapping of the sinus node in humans with structural heart disease: Impact of overdrive suppression on sino-atrial exits. Heart Rhythm. 17. 10.1016/j.hrthm.2020.06.034.

21. Saraf, Kritika & Morris, Gwilym. (2020). 231Local impedance-guided ablation and ultra-high density mapping provide improved ablation metrics vs conventional or contact force-guided ablation for cavotricuspid isthmus dependent atrial flutter. EP Europace. 22. 10.1093/europace/euaa162.051.

22. Bruce, Charo & Rogers, Steven & Saraf, Karan & Kirkwood, G & Kirkland, N & Wright, M & Jamil-Copley, S & Abozguia, K & Fox, D & McCollum, Charles & Morris, Gwilym. (2020). P1450Deep vein thrombosis after right sided catheter ablation; more common then previously thought?. EP Europace. 22. 10.1093/europace/euaa162.324.

23. Shah, Dinakshi & Bruce, Charo & Saraf, Kritika & Chowdhury, S & Kirkwood, G & Fox, D & McCollum, Charles & Morris, Gwilym. (2019). Symptomatic venous thromboembolism after catheter ablation. European Journal of Arrhythmia & Electrophysiology. 2019;5(Suppl. 1).

24. Flannery, M & Sully, Fergus & Janssens, Kristel & Morris, Gwilym & Kalman, J & La Gerche, Andre. (2019). P4423Extreme bradycardia in athletes is due to intrinsic changes within the heart. European Heart Journal. 40. 10.1093/eurheartj/ehz745.0825.

25. D’Souza, Alicia & Trussell, Tariq & Morris, Gwilym & Ph.D, Halina & Boyett, Mark. (2019). Supraventricular Arrhythmias in Athletes: Basic Mechanisms and New Directions. Physiology (Bethesda, Md.). 34. 314-326. 10.1152/physiol.00009.2019.

26. Morris, Gwilym & Ariyaratnam, Jonathan. (2019). Embryology of the Cardiac Conduction System Relevant to Arrhythmias. Cardiac electrophysiology clinics. 10.1016/j.ccep.2019.05.002.

27. Morris, Gwilym & Segan, Louise & Wong, Geoffrey & Wynn, Gareth & Watts, Troy & Heck, Patrick & Walters, Tomos & Nisbet, Ashley & Sparks, Paul & Morton, Joseph & Kistler, Peter & Kalman, Jonathan. (2019). Atrial Tachycardia Arising From the Crista Terminalis, Detailed Electrophysiological Features and Long-Term Ablation Outcomes. JACC: Clinical Electrophysiology. 5. 10.1016/j.jacep.2019.01.014.

28. Kalman, Jonathan & Morris, Gwilym. (2018). Sinus node disease: pathophysiology and natural history. 10.1093/med/9780198784906.003.0448.

29. Choudhury, Moinuddin & Black, N. & Alghmdi, A. & D’Souza, A. & Wang, Ruoxi & Yanni, Joseph & Ph.D, Halina & Kingston, P.A. & Zhang, H. & Boyett, Mark & Morris, Gwilym. (2018). TBX18 overexpression enhances pacemaker function in a rat subsidiary atrial pacemaker model of sick sinus syndrome. The Journal of Physiology. 596. 10.1113/JP276508.

30. Black, Nicholas & D’Souza, Alicia & Wang, Yanwen & Piggins, Hugh & Ph.D, Halina & Morris, Gwilym & Boyett, Mark. (2018). Circadian rhythm of cardiac electrophysiology, arrhythmogenesis and the underlying mechanisms. Heart Rhythm. 16. 10.1016/j.hrthm.2018.08.026.

More research publications are available upon request. 

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