Publications by authors named "David C Lefroy"

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Impact of Pulmonary Vein Isolation on Atrial Fibrillation Organisation: Correlation of Intracardiac and Surface Electrocardiogram Measures.
Nazifa Ahsan, Arunashis Sau, Joseph Barker, Rabiah Neerahoo, Norman Qureshi, David C Lefroy

J Cardiovasc Electrophysiol· October 2025

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High-Precision Hemodynamic and Echocardiographic Assessment of Pacing in Obstructive Hypertrophic Cardiomyopathy.
Jagdeep S Mohal, Matthew J Shun-Shin, Kayla Chiew, Alejandra A Miyazawa, Florentina Simader, David C Lefroy

Pacing Clin Electrophysiol· October 2025

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Therapeutic potential of conduction system pacing as a method for improving cardiac output during ventricular tachycardia.
Daniel Keene, Alejandra A Miyazawa, Ahran D Arnold, Akriti Naraen, Nandita Kaza, David C Lefroy

J Interv Card Electrophysiol· October 2024

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Left bundle branch pacing with and without anodal capture: impact on ventricular activation pattern and acute haemodynamics.
Nadine Ali, Khulat Saqi, Ahran D Arnold, Alejandra A Miyazawa, Daniel Keene, David C Lefroy

Europace· October 2023

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Septal scar as a barrier to left bundle branch area pacing.
Nadine Ali, Ahran D Arnold, Alejandra A Miyazawa, Daniel Keene, Nicholas S Peters, David C Lefroy

Pacing Clin Electrophysiol· September 2023

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Ventricular Conduction Stability Noninvasively Identifies an Arrhythmic Substrate in Survivors of Idiopathic Ventricular Fibrillation.
Ji-Jian Chow, Kevin M W Leong, Matthew J Shun-Shin, Julian O M Ormerod, Michael Koa-Wing, David C Lefroy

J Am Heart Assoc· April 2023

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Artificial intelligence-enabled electrocardiogram to distinguish atrioventricular re-entrant tachycardia from atrioventricular nodal re-entrant tachycardia.
Arunashis Sau, Safi Ibrahim, Daniel B Kramer, Jonathan W Waks, Norman Qureshi, David C Lefroy

Cardiovasc Digit Health J· April 2023

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Comparison of methods for delivering cardiac resynchronization therapy: an acute electrical and haemodynamic within-patient comparison of left bundle branch area, His bundle, and biventricular pacing.
Nadine Ali, Ahran D Arnold, Alejandra A Miyazawa, Daniel Keene, Ji-Jian Chow, David C Lefroy

Europace· March 2023

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Artificial intelligence-enabled electrocardiogram to distinguish cavotricuspid isthmus dependence from other atrial tachycardia mechanisms.
Arunashis Sau, Safi Ibrahim, Amar Ahmed, Balvinder Handa, Daniel B Kramer, David C Lefroy

Eur Heart J Digit Health· September 2022

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Cycle Length Evaluation in Persistent Atrial Fibrillation Using Kernel Density Estimation to Identify Transient and Stable Rapid Atrial Activity.
Szabolcs Z Nagy, Patrick Kasi, Valtino X Afonso, Nathaniel Bird, Brian Pederson, David C Lefroy

Cardiovasc Eng Technol· April 2022

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A Multicenter External Validation of a Score Model to Predict Risk of Events in Patients With Brugada Syndrome.
Ji-Jian Chow, Kevin M W Leong, Momina Yazdani, Hani W Huzaien, Sian Jones, David C Lefroy

Am J Cardiol· December 2021

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Left ventricular activation time and pattern are preserved with both selective and nonselective His bundle pacing.
Ahran D Arnold, Matthew J Shun-Shin, Nadine Ali, Daniel Keene, James P Howard, David C Lefroy

Heart Rhythm O2· October 2021

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Electrocardiographic predictors of successful resynchronization of left bundle branch block by His bundle pacing.
Ahran D Arnold, Matthew J Shun-Shin, Daniel Keene, James P Howard, Ji-Jian Chow, David C Lefroy

J Cardiovasc Electrophysiol· February 2021

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Prognostic significance of troponin level in 3121 patients presenting with atrial fibrillation (The NIHR Health Informatics Collaborative TROP-AF study).
Amit Kaura, Ahran D Arnold, Vasileios Panoulas, Benjamin Glampson, Jim Davies, David C Lefroy

J Am Heart Assoc· April 2020

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Ventricular conduction stability test: a method to identify and quantify changes in whole heart activation patterns during physiological stress.
Matthew J Shun-Shin, Kevin M W Leong, Fu Siong Ng, Nicholas W F Linton, Zachary I Whinnett, David C Lefroy

Europace· September 2019

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Voltage during atrial fibrillation is superior to voltage during sinus rhythm in localizing areas of delayed enhancement on magnetic resonance imaging: An assessment of the posterior left atrium in patients with persistent atrial fibrillation.
Norman A Qureshi, Steven J Kim, Chris D Cantwell, Valtino X Afonso, Wenjia Bai, David C Lefroy

Heart Rhythm· September 2019

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Prevalence of spontaneous type I ECG pattern, syncope, and other risk markers in sudden cardiac arrest survivors with Brugada syndrome.
Kevin M W Leong, Fu Siong Ng, Sian Jones, Ji-Jian Chow, Norman Qureshi, David C Lefroy

Pacing Clin Electrophysiol· February 2019

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His Resynchronization Versus Biventricular Pacing in Patients With Heart Failure and Left Bundle Branch Block.
Ahran D Arnold, Matthew J Shun-Shin, Daniel Keene, James P Howard, S M Afzal Sohaib, David C Lefroy

J Am Coll Cardiol· December 2018

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Comparison of the Prognostic Usefulness of the European Society of Cardiology and American Heart Association/American College of Cardiology Foundation Risk Stratification Systems for Patients With Hypertrophic Cardiomyopathy.
Kevin M W Leong, Ji-Jian Chow, Fu Siong Ng, Emanuela Falaschetti, Norman Qureshi, David C Lefroy

Am J Cardiol· February 2018

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Repolarization abnormalities unmasked with exercise in sudden cardiac death survivors with structurally normal hearts.
Kevin M W Leong, Fu Siong Ng, Caroline Roney, Christopher Cantwell, Matthew J Shun-Shin, David C Lefroy

J Cardiovasc Electrophysiol· January 2018

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ST-Elevation Magnitude Correlates With Right Ventricular Outflow Tract Conduction Delay in Type I Brugada ECG.
Kevin M W Leong, Fu Siong Ng, Cheng Yao, Caroline Roney, Patricia Taraborrelli, David C Lefroy

Circ Arrhythm Electrophysiol· October 2017

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Visualizing Localized Reentry With Ultra-High Density Mapping in Iatrogenic Atrial Tachycardia: Beware Pseudo-Reentry.
Vishal Luther, Markus Sikkel, Nathan Bennett, Fernando Guerrero, Kevin Leong, David C Lefroy

Circ Arrhythm Electrophysiol· April 2017

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Management of ventricular tachycardia.
Vishal Luther, Sukhjinder S Nijjer, David C Lefroy

Br J Hosp Med (Lond)· January 2017

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Diagnosis of ventricular tachycardia.
Sukhjinder S Nijjer, Vishal Luther, David C Lefroy

Br J Hosp Med (Lond)· January 2017

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A Collapsed Sportsman With a Shock Advised in Sinus Rhythm: The Importance of Automated External Defibrillator Rhythm Strip Retrieval Prior to Defibrillator Implantation.
Vishal Luther, Markus B Sikkel, Ian Wright, Mark Faulkner, Norman Qureshi, David C Lefroy

Circ Arrhythm Electrophysiol· April 2016

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