Rafael J. Ramirez

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Peter H Backxdepartment of biology York universityVerified email at yorku.ca
Shivkumar, KalyanamProfessor of Medicine (Cardiology), Radiology & Bioengineering, UCLAVerified email at mednet.ucla.edu
Jose JalifeDistinguished Senior Scientist, Centro Nacional de Investigaciones Cardiovasculares (CNIC), MadridVerified email at cnic.es
Stanley NattelProfessor of Medicine, Université de MontréalVerified email at icm-mhi.org
Guadalupe Guerrero-SernaUniversity of MichiganVerified email at umich.edu
Rajan SahProfessor, Washington University School of MedicineVerified email at wustl.edu
Daniela Ponce-BalbuenaUniversity of MichiganVerified email at umich.edu
B. Cicero WillisPediatric Cardiology Fellow - Physician-Scientist track- UT Southwestern Medical CenterVerified email at utsouthwestern.edu
Kuljeet KaurTufts UniversityVerified email at tufts.edu
Omer BerenfeldVerified email at umich.edu
Roderick TungProfessor of Medicine, University of Arizona College of Medicine- PhoenixVerified email at arizona.edu
Noel G. BoyleUCLAVerified email at mednet.ucla.edu
Gavin OuditUniversity of AlbertaVerified email at ualberta.ca
Manuel ZarzosoAssistant Professor, University of ValenciaVerified email at uv.es
Todd J HerronUniversity of MichiganVerified email at umich.edu
Jose F HuizarProfessor of Medicine, Virginia Commonwealth UniversityVerified email at vcuhealth.org
Eric BuchProfessor of Medicine, UCLA Cardiac Arrhythmia Center, Univ of CA, Los AngelesVerified email at mednet.ucla.edu
Alex Y. TanVirginia commonwealth university, Harvard Medical School, Cedars-Sinai Medical CenterVerified email at va.gov
Oscar Salvador MontañésProfesor Auxiliar Medicina, Universidad Francisco de VitoriaVerified email at torrejonsalud.com
Uma Mahesh R. AvulaUniversity of Mississippi Medical CenterVerified email at umc.edu

Rafael J. Ramirez

Johns Hopkins University, Department of Surgery

Verified email at jhmi.edu

Cardiac Electrophysiology arrhythmias ion channels nonlinear dynamics


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Ionic mechanisms underlying human atrial action potential properties: insights from a mathematical model M Courtemanche, RJ Ramirez, S Nattel American Journal of Physiology-Heart and Circulatory Physiology 275 (1 …, 1998	1474	1998
Ionic targets for drug therapy and atrial fibrillation-induced electrical remodeling: insights from a mathematical model M Courtemanche, RJ Ramirez, S Nattel Cardiovascular research 42 (2), 477-489, 1999	364	1999
Regulation of cardiac excitation–contraction coupling by action potential repolarization: role of the transient outward potassium current (I_to) R Sah, RJ Ramirez, GY Oudit, D Gidrewicz, MG Trivieri, C Zobel, ... The Journal of physiology 546 (1), 5-18, 2003	292	2003
The molecular physiology of the cardiac transient outward potassium current (Ito) in normal and diseased myocardium GY Oudit, Z Kassiri, R Sah, RJ Ramirez, C Zobel, PH Backx Journal of molecular and cellular cardiology 33 (5), 851-872, 2001	274	2001
Characterization of the arrhythmogenic substrate in ischemic and nonischemic cardiomyopathy: implications for catheter ablation of hemodynamically unstable ventricular tachycardia S Nakahara, R Tung, RJ Ramirez, Y Michowitz, M Vaseghi, E Buch, ... Journal of the American College of Cardiology 55 (21), 2355-2365, 2010	263	2010
Mathematical analysis of canine atrial action potentials: rate, regional factors, and electrical remodeling RJ Ramirez, S Nattel, M Courtemanche American Journal of Physiology-Heart and Circulatory Physiology 279 (4 …, 2000	233	2000
Modulation of Ca²⁺ Release in Cardiac Myocytes by Changes in Repolarization Rate: Role of Phase-1 Action Potential Repolarization in Excitation-Contraction … R Sah, RJ Ramirez, PH Backx Circulation research 90 (2), 165-173, 2002	173	2002
Dominant frequency increase rate predicts transition from paroxysmal to long-term persistent atrial fibrillation RP Martins, K Kaur, E Hwang, RJ Ramirez, BC Willis, D Filgueiras-Rama, ... Circulation 129 (14), 1472-1482, 2014	170	2014
Galectin-3 regulates atrial fibrillation remodeling and predicts catheter ablation outcomes Y Takemoto, RJ Ramirez, M Yokokawa, K Kaur, D Ponce-Balbuena, ... JACC: Basic to Translational Science 1 (3), 143-154, 2016	132	2016
Alterations in action potential profile enhance excitation‐contraction coupling in rat cardiac myocytes R Sah, RJ Ramirez, R Kaprielian, PH Backx The Journal of physiology 533 (1), 201-214, 2001	107	2001
Myosin light chain 2-based selection of human iPSC-derived early ventricular cardiac myocytes A Bizy, G Guerrero-Serna, B Hu, D Ponce-Balbuena, BC Willis, M Zarzoso, ... Stem cell research 11 (3), 1335-1347, 2013	106	2013
Distribution of late potentials within infarct scars assessed by ultra high-density mapping S Nakahara, R Tung, RJ Ramirez, J Gima, I Wiener, A Mahajan, NG Boyle, ... Heart Rhythm 7 (12), 1817-1824, 2010	87	2010
Time-dependent transients in an ionically based mathematical model of the canine atrial action potential J Kneller, RJ Ramirez, D Chartier, M Courtemanche, S Nattel American Journal of Physiology-Heart and Circulatory Physiology 282 (4 …, 2002	84	2002
Cardiac Kir2.1 and Na_V1.5 Channels Traffic Together to the Sarcolemma to Control Excitability D Ponce-Balbuena, G Guerrero-Serna, CR Valdivia, R Caballero, ... Circulation research 122 (11), 1501-1516, 2018	83	2018
Distinguishing epicardial fat from scar: analysis of electrograms using high-density electroanatomic mapping in a novel porcine infarct model R Tung, S Nakahara, R Ramirez, C Lai, MC Fishbein, K Shivkumar Heart Rhythm 7 (3), 389-395, 2010	71	2010
Eplerenone reduces atrial fibrillation burden without preventing atrial electrical remodeling Y Takemoto, RJ Ramirez, K Kaur, O Salvador-Montañés, ... Journal of the American College of Cardiology 70 (23), 2893-2905, 2017	61	2017
NOX4-dependent hydrogen peroxide overproduction in human atrial fibrillation and HL-1 atrial cells: relationship to hypertension J Zhang, JY Youn, A Kim, R Ramirez, L Gao, D Ngo, J Scovotti, ... Frontiers in physiology 3, 140, 2012	61	2012
The phosphoinositide 3-kinase inhibitor LY294002 enhances cardiac myocyte contractility via a direct inhibition of I_k,slow currents H Sun, GY Oudit, RJ Ramirez, D Costantini, PH Backx Cardiovascular research 62 (3), 509-520, 2004	50	2004
Intrapericardial balloon placement for prevention of collateral injury during catheter ablation of the left atrium in a porcine model S Nakahara, RJ Ramirez, E Buch, Y Michowitz, M Vaseghi, C De Diego, ... Heart Rhythm 7 (1), 81-87, 2010	48	2010
Characterization of myocardial scars: electrophysiological imaging correlates in a porcine infarct model S Nakahara, M Vaseghi, RJ Ramirez, CG Fonseca, CK Lai, JP Finn, ... Heart rhythm 8 (7), 1060-1067, 2011	40	2011

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