JohnJosephMahmarianMD

Cardiology • Houston, TX

Adult Congenital Heart Disease

Professor, Cardiology, Weill Cornell Medical College of Cornell University

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Office
6550 Fannin Street
Suite 1901
Houston, TX 77030
Phone+1 713-441-1100

Fax+1 713-790-2643
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Education & Training

Baylor College of MedicineFellowship, Cardiovascular Disease, 1983 - 1986
Baylor College of MedicineResidency, Internal Medicine, 1980 - 1983
New York Medical CollegeClass of 1980

Certifications & Licensure

TX State Medical License 1981 - 2025
American Board of Internal Medicine Internal Medicine
American Board of Internal Medicine Cardiovascular Disease

Awards, Honors, & Recognition

Regional Top Doctor Castle Connolly, 2014
Heart/Stroke Recognition Program National Committee for Quality Assurance, 2013-2016
Fellow (FACC) American College of Cardiology

Clinical Trials

Reducing Radioisotope Dose: the Half-Dose CZT Study Start of enrollment: 2012 Jan 01
Completed
Not Applicable

Publications & Presentations

PubMed

Coronary microvascular health in symptomatic patients with prior COVID-19 infection: an updated analysis.
Ahmed Ibrahim Ahmed, Mahmoud Al Rifai, Fares Alahdab, Jean Michel Saad, Yushui Han, Moath Said Alfawara, Malek Nayfeh, Maan Malahfji, Faisal Nabi, John J Mahmarian, Jo...> ;European Heart Journal. Cardiovascular Imaging. 2023 Oct 27
Temporal trends in the use of cardiac computerized tomography angiography and transesophageal echocardiography for left atrial appendage thrombus detection.
Malek Nayfeh, Ahmed Ibrahim Ahmed, Mahmoud Al Rifai, Fares Alahdab, Sherif F Nagueh, Mohammed A Chamsi-Pasha, John J Mahmarian, Su Min Chang, William A Zoghbi, Mouaz H...> ;Journal of Cardiovascular Computed Tomography. 2023 Apr 13
7 citations
Incremental prognostic value of digital positron emission tomography derived myocardial flow reserve: A prospective cohort study.
Ahmed Ibrahim Ahmed, Mahmoud Al Rifai, Fares Alahdab, Jean Michel Saad, Yushui Han, Moath Said Alfawara, Faisal Nabi, John J Mahmarian, Mouaz H Al-Mallah> ;International Journal of Cardiology. 2023 Jan 15
18 citations
2022 ASNC/AAPM/SCCT/SNMMI guideline for the use of CT in hybrid nuclear/CT cardiac imaging.
Mouaz H Al-Mallah, Timothy M Bateman, Kelley R Branch, Andrew Crean, Eric L Gingold, Randall C Thompson, Sarah E McKenney, Edward J Miller, Venkatesh L Murthy, Koen Ni...> ;Journal of Nuclear Cardiology. 2022 Dec 1
3 citations
Sex differences in machine learning computed tomography-derived fractional flow reserve.
Mahmoud Al Rifai, Ahmed Ibrahim Ahmed, Yushui Han, Jean Michel Saad, Talal Alnabelsi, Faisal Nabi, Su Min Chang, Myra Cocker, Chris Schwemmer, Juan C Ramirez-Giraldo, ...> ;Scientific Reports. 2022 Aug 16
6 citations
Added prognostic value of plaque burden to computed tomography angiography and myocardial perfusion imaging
Ahmed Ibrahim Ahmed, Yushui Han, Mahmoud Al Rifai, Talal Alnabelsi, Faisal Nabi, Su Min Chang, Mohammed A. Chamsi-Pasha, Khurram Nasir, John J. Mahmarian, Miguel Cainz...> ;Atherosclerosis. 2021 Aug 19
6 citations
Outcomes of patients with moderate-to-severe Ischemia excluded from the ischemia trial
Mouaz H. Al-Mallah, Ahmed Ibrahim Ahmed, Faisal Nabi, Su Min Chang, Neal S. Kleiman, Mohammed A. Chamsi-Pasha, Alpesh Shah, Yuishi Han, William A. Zoghbi, John J. Mahm...> ;Journal of Nuclear Cardiology. 2021 Jul 6
5 citations
Left ventricular mass on positron emission tomography: Validation against cardiovascular magnetic resonance
Maan Malahfji, Ahmed Ibrahim Ahmed, Yushui Han, Aaron K. Jung, Talal Alnabelsi, Faisal Nabi, Dipan J. Shah, Ahmed Aljizeeri, Alexis Poitrasson-Rivière, Edward P. Ficar...> ;Journal of Nuclear Cardiology. 2021 Feb 24
12 citations
Prognostic Value of Computed Tomography-Derived Fractional Flow Reserve Comparison With Myocardial Perfusion Imaging.
Ahmed Ibrahim Ahmed, Yushui Han, Mahmoud Al Rifai, Talal Alnabelsi, Faisal Nabi, Su Min Chang, Myra Cocker, Chris Schwemmer, Juan Carlos Ramirez-Giraldo, Neal S. Kleim...> ;JACC. Cardiovascular Imaging. 2021 Feb 22
10 citations
Worldwide Variation in the Use of Nuclear Cardiology Camera Technology, Reconstruction Software, and Imaging Protocols.
Cole B Hirschfeld, Mathew Mercuri, Thomas N.B. Pascual, Ganesan Karthikeyan, João V. Vitola, John J. Mahmarian, Nathan Better, Salah E Bouyoucef, Henry Hee-Seung Bom, ...> ;JACC. Cardiovascular Imaging. 2021 Sep 1
1 citations
Association Between FFRCT and Instantaneous Wave-Free Ratio (iFR) of Intermediate Lesions on Coronary Computed Tomography Angiography.
Faheemullah Beg, Hasan Rehman, Mohammed A. Chamsi-Pasha, Faisal Nabi, Su Min Chang, John J. Mahmarian, Mouaz H. Al-Mallah> ;Cardiovascular Revascularization Medicine. 2021 Oct 1
8 citations
Worldwide Diagnostic Reference Levels for Single-Photon Emission Computed Tomography Myocardial Perfusion Imaging: Findings From INCAPS
Cole B Hirschfeld, Maurizio Dondi, Thomas N.B. Pascual, Mathew Mercuri, João V. Vitola, Ganesan Karthikeyan, Nathan Better, John J. Mahmarian, Salah E Bouyoucef, Henry...> ;JACC. Cardiovascular Imaging. 2021 Mar 1
A tale of two technologies: Can nuclear cardiology survive the emergence of cardiac CT the seventeenth annual Mario S. Verani lectureship.
John J. Mahmarian> ;Journal of Nuclear Cardiology. 2020 Jun 1
1 citations
Mechanical Mitral Valve Thrombosis in a Patient With Prior Nonbacterial Thrombotic Endocarditis.
DO Kalyan R. Chitturi, Miguel A. Castro, Eric Salazar, Michael Deavers, Su Min Chang, John J. Mahmarian, Karla M. Kurrelmeyer> ;JACC. Case Reports. 2020 Apr 1
3 citations
Cardiac Computed Tomography for Structural Heart Disease Assessment and Therapeutic Planning: Focus on Prosthetic Valve Dysfunction.
Alpana Senapati, Nadeen N. Faza, John J. Mahmarian, Su Min Chang> ;Methodist Debakey Cardiovascular Journal. 2020 Apr 1
5 citations
Cardiac Computed Tomography for Comprehensive Coronary Assessment: Beyond Diagnosis of Anatomic Stenosis
Roosha Parikh, Apurva Patel, Bin Lu, Alpana Senapati, John J. Mahmarian, Su Min Chang> ;Methodist Debakey Cardiovascular Journal. 2020 Apr 1
25 citations
Application of Low Tube Potentials in CCTA: Results From the PROTECTION VI Study
Thomas J. Stocker, Jonathon Leipsic, Martin Hadamitzky, Marcus Y. Chen, Ronen Rubinshtein, Simon Deseive, Mathias Heckner, Jeroen J. Bax, Kakuya Kitagawa, Hugo Marques...> ;JACC. Cardiovascular Imaging. 2020 Feb 1
6 citations
Controversies in Diagnostic Imaging of Patients With Suspected Stable and Acute Chest Pain Syndromes
, , , , , , , , , , , , , , , , , , > ;JACC. Cardiovascular Imaging. 2019 Jul 1
196 citations
Single Photon Emission Computed Tomography (SPECT) Myocardial Perfusion Imaging Guidelines: Instrumentation, Acquisition, Processing, and Interpretation
Sharmila Dorbala, Karthik Ananthasubramaniam, Ian S. Armstrong, Panithaya Chareonthaitawee, E. Gordon DePuey, Andrew J. Einstein, Robert J. Gropler, Thomas A. Holly, J...> ;Journal of Nuclear Cardiology. 2018 Oct 1
6 citations
Imaging to Stratify Coronary Artery Disease Risk in Asymptomatic Patients with Diabetes.
Maan Malahfji, John J. Mahmarian> ;Methodist Debakey Cardiovascular Journal. 2018 Oct 1
3 citations
Nuclear cardiology practices and radiation exposure in Africa: results from the IAEA Nuclear Cardiology Protocols Study (INCAPS)
Salah E Bouyoucef, Mathew Mercuri, Thomas N.B. Pascual, Adel H. Allam, Mboyo Vangu, João V. Vitola, Nathan Better, Ganesan Karthikeyan, John J. Mahmarian, Madan M. Reh...> ;Cardiovascular Journal of Africa. 2017 Jul 1
26 citations
Coronary artery calcium score as a predictor for incident stroke: Systematic review and meta-analysis☆
Kongkiat Chaikriangkrai, Hye Yeon Jhun, Ghanshyam Palamaner Subash Shantha, Aref A. Bin Abdulhak, Gardar Sigurdsson, Faisal Nabi, John J. Mahmarian, Su Min Chang> ;International Journal of Cardiology. 2017 Jun 1
4 citations
Regadenoson stress during low-level exercise: The EXERRT trial-does it move the needle?
John J. Mahmarian> ;Journal of Nuclear Cardiology. 2017 May 15
5 citations
Nuclear Cardiology Practice in Asia: Analysis of Radiation Exposure and Best Practice for Myocardial Perfusion Imaging ― Results From the IAEA Nuclear Cardiology Proto...
Thomas N.B. Pascual, Mathew Mercuri, Noura El-Haj, Henry Hee-Sung Bom, Vikram Lele, Mouaz H. Al-Mallah, Osnat Luxenburg, Ganesan Karthikeyan, João V. Vitola, John J. M...> ;Circulation Journal. 2017 Mar 24
5 citations
Nuclear Cardiology Practices and Radiation Exposure in the Oceania Region: Results From the IAEA Nuclear Cardiology Protocols Study (INCAPS)
Sinjini Biswas, Nathan Better, Thomas N.B. Pascual, Mathew Mercuri, João V. Vitola, Ganesan Karthikeyan, James Westcott, Erick Alexanderson, Adel H. Allam, Mouaz H. Al...> ;Heart, Lung & Circulation. 2017 Jan 1
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Press Mentions

6 Trends in Cardiac Nuclear Imaging at the ASNC 2019 MeetingNovember 22nd, 2019
Appropriate Use CriteriaMarch 1st, 2019
Radiation Safety in Nuclear Cardiology—Current Knowledge and Practice: Results from the 2011 American Society of Nuclear Cardiology Member SurveyJune 10th, 2013
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