Publications by authors named "Christopher Rajkumar"

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A double-blind randomised placebo-controlled trial of percutaneous coronary intervention for the relief of stable angina without antianginal medications: design and rationale of the ORBITA-2 trial.
Alexandra N Nowbar, Christopher Rajkumar, Michael Foley, Fiyyaz Ahmed-Jushuf, James P Howard, Henry Seligman, Ricardo Petraco, Sayan Sen, Sukhjinder S Nijjer, Matthew J Shun-Shin

EuroIntervention· April 2022

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The Role of the Collateral Circulation in Stable Angina: An Invasive Placebo-Controlled Study.
Christopher A Rajkumar, Michael J Foley, Fiyyaz Ahmed-Jushuf, Shayna Chotai, Florentina A Simader

Circulation· December 2025

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Reproducibility, Accuracy, and Treatment Impact of Ischemia Severity Assessment From Coronary Angiography　- An ORBITA Study Analysis.
Masafumi Nakayama, Michael Foley, Christopher A Rajkumar, James P Howard, Darrel P Francis

Circ Rep· November 2025

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Microbubble Contrast Agent Use During Invasive Coronary Microvascular Assessment.
Rahul Bahl, Samay Mehta, Henry Seligman, Christopher A Rajkumar, Suraya Gafore

J Soc Cardiovasc Angiogr Interv· October 2025

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Safety, Efficacy, and Effectiveness of Coronary Sinus Reducer Implantation in Refractory Angina: A Meta-Analysis.
Utkarsh Ojha, Muhammad Mohsin, Krzysztof Macierzanka, Fiyyaz Ahmed-Jushuf, Christopher A Rajkumar

JACC Cardiovasc Interv· August 2025

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Ischemia on Dobutamine Stress Echocardiography Predicts Efficacy of PCI: Results From the ORBITA-2 Trial.
Fiyyaz Ahmed-Jushuf, Michael J Foley, Christopher A Rajkumar, Shayna Chotai, Florentina A Simader

J Am Coll Cardiol· May 2025

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Redefining the Rules of Revascularization: Lessons From ISCHEMIA for the Future of Appropriate Use Criteria.
Christopher A Rajkumar

Circ Cardiovasc Qual Outcomes· March 2025

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Difference in Strategy and Clinical Outcomes of Left Main Disease in Japan and Non-Japanese Countries.
Takayuki Warisawa, Christopher M Cook, Yousif Ahmad, James P Howard, Henry Seligman, Christopher Rajkumar

Int Heart J· March 2025

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Fractional Flow Reserve and Instantaneous Wave-Free Ratio as Predictors of the Placebo-Controlled Response to Percutaneous Coronary Intervention in Stable Coronary Artery Disease.
Michael J Foley, Christopher A Rajkumar, Fiyyaz Ahmed-Jushuf, Florentina Simader, Shayna Chotai

Circulation· January 2025

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A systematic review of enrolment criteria and treatment efficacy for microvascular angina.
Matthew Hammond-Haley, Kayla Chiew, Fiyyaz Ahmed-Jushuf, Christopher A Rajkumar, Michael J Foley

EuroIntervention· January 2025

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REPLY: Let Us Focus on Angina Mechanisms in Many, Not Just Typical Symptoms in a Few.
Christopher A Rajkumar, Rasha K Al-Lamee

J Am Coll Cardiol· November 2024

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Do Current Clinical Guidelines Set Percutaneous Coronary Intervention Up to Fail? Insights From the ORBITA-2 Trial.
Christopher A Rajkumar, Rasha K Al-Lamee

Circ Cardiovasc Qual Outcomes· September 2024

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Placebo Control and Blinding in Randomized Trials of Procedural Interventions: A Systematic Review and Meta-Regression.
Christopher A Rajkumar, Katharine E Thomas, Michael Foley, Sashiananthan Ganesananthan, Holli Evans

JAMA Surg· July 2024

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Physiological Assessment with iFR prior to FFR Measurement in Left Main Disease.
Takayuki Warisawa, Christopher M Cook, Yousif Ahmad, James P Howard, Henry Seligman, Christopher Rajkumar

Cardiovasc Interv Ther· July 2024

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Symptoms as a Predictor of the Placebo-Controlled Efficacy of PCI in Stable Coronary Artery Disease.
Florentina A Simader, Christopher A Rajkumar, Michael J Foley, Fiyyaz Ahmed-Jushuf, Shayna Chotai

J Am Coll Cardiol· July 2024

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Coronary sinus reducer for the treatment of refractory angina (ORBITA-COSMIC): a randomised, placebo-controlled trial.
Michael J Foley, Christopher A Rajkumar, Fiyyaz Ahmed-Jushuf, Florentina A Simader, Shayna Chotai

Lancet· April 2024

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Why Does a Cardiologist Believe in a Therapy? The Role of Intuitiveness and Understanding the Mechanism.
Michael J Foley, Christopher A Rajkumar, Fiyyaz Ahmed-Jushuf, Alexandra N Nowbar, Florentina Simader

Circ Cardiovasc Qual Outcomes· March 2024

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A Placebo-Controlled Trial of PCI for Stable Angina. Reply.
Rasha K Al-Lamee, Christopher A Rajkumar

N Engl J Med· March 2024

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The ability of contemporary cardiologists to judge the ischemic impact of a coronary lesion visually.
Michael Foley, Christopher A Rajkumar, Fiyyaz Ahmed-Jushuf, Daniel Nour, Chi Ho Fung

Cardiovasc Revasc Med· February 2024

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A double-blind, randomised, placebo-controlled trial of the coronary sinus Reducer in refractory angina: design and rationale of the ORBITA-COSMIC trial.
Michael J Foley, Christopher A Rajkumar, Fiyyaz Ahmed-Jushuf, Florentina Simader, Rachel H Pathimagaraj

EuroIntervention· February 2024

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Typical angina and coronary artery disease: is the common ground smaller than we think?
Christopher Rajkumar, Florentina Simader, Rasha Kadem Al-Lamee

Heart· September 2023

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Development of artificial intelligence tools for invasive Doppler-based coronary microvascular assessment.
Henry Seligman, Sapna B Patel, Anissa Alloula, James P Howard, Christopher M Cook, Christopher A Rajkumar

Eur Heart J Digit Health· August 2023

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Physiology-guided PCI versus CABG for left main coronary artery disease: insights from the DEFINE-LM registry.
Takayuki Warisawa, Christopher M Cook, Yoshiaki Kawase, James P Howard, Yousif Ahmad, Christopher Rajkumar

Cardiovasc Interv Ther· July 2023

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Deferred Versus Performed Revascularization for Left Main Coronary Disease With Hemodynamic Significance.
Takayuki Warisawa, Christopher M Cook, Yousif Ahmad, James P Howard, Henry Seligman, Christopher Rajkumar

Circ Cardiovasc Interv· June 2023

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