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Hemal Nayak

TitleAssociate Professor
InstitutionUniversity of Chicago
DepartmentMedicine-Cardiology
AddressChicago IL 60637
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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    1. Chen AY, Narichania A, Onsager D, Nayak HM, Tung R. Direct subxiphoid pericardioscopic visualization of epicardial ventricular tachycardia mapping and ablation. Heart Rhythm O2. 2022 Feb; 3(1):105-108. PMID: 35243442.
      View in: PubMed
    2. Salazar P, Beaser AD, Upadhyay GA, Aziz Z, Besser S, Shatz DY, Nayak HM, Tung R. Empiric ablation of polymorphic ventricular tachycardia/fibrillation in the absence of a mappable trigger: Prospective feasibility and efficacy of pacemap matching to defibrillator electrograms. Heart Rhythm. 2022 Apr; 19(4):527-535. PMID: 34757186.
      View in: PubMed
    3. Upadhyay GA, Henry M, Genovese D, Desai P, Lattell J, Wey H, Besser SA, Aziz Z, Beaser AD, Ozcan C, Nayak HM, Lang RM, Tung R. Impact of physiological pacing on functional mitral regurgitation in systolic dysfunction: Initial echocardiographic remodeling findings after His bundle pacing. Heart Rhythm O2. 2021 Oct; 2(5):446-454. PMID: 34667959.
      View in: PubMed
    4. Kohli U, Hazra A, Shahab A, Beaser AD, Aziz ZA, Upadhyay GA, Ozcan C, Tung R, Nayak HM. Atypical pathogens associated with cardiac implantable electronic device infections. Pacing Clin Electrophysiol. 2021 Sep; 44(9):1549-1561. PMID: 34245025.
      View in: PubMed
    5. Nishimura T, Upadhyay GA, Aziz ZA, Beaser AD, Shatz DY, Nayak HM, Tung R. Double loop ventricular tachycardia activation patterns with single loop mechanisms: Asymmetric entrainment responses during "pseudo-figure-of-eight" reentry. Heart Rhythm. 2021 09; 18(9):1548-1556. PMID: 33965607.
      View in: PubMed
    6. Kohli U, Obuobi S, Addetia K, Ota T, Nayak HM. PR interval prolongation is significantly associated with aortic root abscess: An age- and gender-matched study. Ann Noninvasive Electrocardiol. 2021 07; 26(4):e12849. PMID: 33939235.
      View in: PubMed
    7. Kohli U, Sriram CS, Nayak HM. A novel familial SCN5A exon 20 deletion is associated with a heterogeneous phenotype. J Electrocardiol. 2021 May-Jun; 66:131-135. PMID: 33951591.
      View in: PubMed
    8. Kohli U, Nayak HM, Romme AG, Nguyen HH. Resting electrocardiographic differences in ventricular repolarization between children and young adults with congenital heart disease and those with a structurally normal heart are diminished by exercise. Pacing Clin Electrophysiol. 2021 Jun; 44(6):1047-1053. PMID: 33835488.
      View in: PubMed
    9. Kohli U, Sriram CS, Nayak HM. Isolated left bundle branch block in the young: case reports and review of literature. Pacing Clin Electrophysiol. 2021 Aug; 44(8):1466-1473. PMID: 33835496.
      View in: PubMed
    10. Jiang R, Nishimura T, Beaser AD, Aziz ZA, Upadhyay GA, Shatz DY, Nayak HM, Liao H, Zhan X, Chung FP, Xue Y, Wu S, Tung R. Spatial and transmural properties of the reentrant ventricular tachycardia circuit in arrhythmogenic right ventricular cardiomyopathy: Simultaneous epicardial and endocardial recordings. Heart Rhythm. 2021 06; 18(6):916-925. PMID: 33524624.
      View in: PubMed
    11. Nishimura T, Patel HN, Wang S, Upadhyay GA, Smith HL, Ozcan C, Shatz DY, Nayak HM, Patel AR, Tung R. Prognostic value of cardiac magnetic resonance septal late gadolinium enhancement patterns for periaortic ventricular tachycardia ablation: Heterogeneity of the anteroseptal substrate in nonischemic cardiomyopathy. Heart Rhythm. 2021 04; 18(4):579-588. PMID: 33301979.
      View in: PubMed
    12. Nayak HM, Aziz ZA, Kwasnik A, Lee E, Shatz DY, Tenorio R, Besser SA, Beaser AD, Ozcan C, Upadhyay GA, Tung R. Indirect and Direct Evidence for 3-D Activation During Left Atrial Flutter: Anatomy of Epicardial Bridging. JACC Clin Electrophysiol. 2020 12; 6(14):1812-1823. PMID: 33357578.
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    13. Mazzone S, Kohli U, Aziz ZA, Beaser AD, Upadhyay GA, Tung R, Nayak HM. Late presentation of recurrent syncope after permanent pacemaker implantation due to Lead-Header malapposition. Indian Pacing Electrophysiol J. 2021 Mar-Apr; 21(2):124-127. PMID: 33271274.
      View in: PubMed
    14. Nishimura T, Upadhyay GA, Aziz ZA, Beaser AD, Shatz DY, Nayak HM, Tung R. Circuit Determinants of Ventricular Tachycardia Cycle Length: Characterization of Fast and Unstable Human Ventricular Tachycardia. Circulation. 2021 01 19; 143(3):212-226. PMID: 33169628.
      View in: PubMed
    15. Nayak HM, Sauser E, Xie T. Interference of subcutaneous implantable cardioverter defibrillator by deep brain stimulation. Parkinsonism Relat Disord. 2020 12; 81:75-77. PMID: 33075699.
      View in: PubMed
    16. Liao H, Wei W, Tanager KS, Miele F, Upadhyay GA, Beaser AD, Aziz Z, Nayak HM, Ozcan C, Nishimura T, Jiang R, Shatz D, Husain AN, Tung R. Left ventricular summit arrhythmias with an abrupt V3 transition: Anatomy of the aortic interleaflet triangle vantage point. Heart Rhythm. 2021 01; 18(1):10-19. PMID: 32707175.
      View in: PubMed
    17. Beaser AD, Aziz Z, Besser SA, Jones CI, Jameria Z, Kannan A, Upadhyay GA, Broman MT, Ozcan C, Tung R, Nayak HM. Characterization of Lead Adherence Using Intravascular Ultrasound to Assess Difficulty of Transvenous Lead Extraction. Circ Arrhythm Electrophysiol. 2020 08; 13(8):e007726. PMID: 32628867.
      View in: PubMed
    18. Nayak HM, Patel R, McKane S, James KJ, Meyer TE, Germany RE, Stellbrink C, Costanzo MR, Augostini R. Transvenous phrenic nerve stimulation for central sleep apnea is safe and effective in patients with concomitant cardiac devices. Heart Rhythm. 2020 12; 17(12):2029-2036. PMID: 32619739.
      View in: PubMed
    19. Kohli U, Kuntz L, Nayak HM. RYR2 p.R169L mutation and left ventricular hypertrophy in a child with emotion-triggered sudden death. Cardiol Young. 2020 Jul; 30(7):1039-1042. PMID: 32513315.
      View in: PubMed
    20. Kohli U, Gruenstein DH, Nguyen HH, Nayak HM. Marked lateral ST-segment elevation with inferior ST-segment depression in an asymptomatic 12 year-old girl: A normal variant? J Electrocardiol. 2020 Jul - Aug; 61:23-26. PMID: 32512245.
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    21. Kohli U, Aziz Z, Beaser AD, Nayak HM. Ventricular arrhythmia suppression with ivabradine in a patient with catecholaminergic polymorphic ventricular tachycardia refractory to nadolol, flecainide, and sympathectomy. Pacing Clin Electrophysiol. 2020 05; 43(5):527-533. PMID: 32259298.
      View in: PubMed
    22. Nishimura T, Beaser AD, Aziz ZA, Upadhyay GA, Ozcan C, Raiman M, Shatz DY, Besser SA, Shatz NA, Nayak HM, Tung R. Periaortic ventricular tachycardia in structural heart disease: Evidence of localized reentrant mechanisms. Heart Rhythm. 2020 08; 17(8):1271-1279. PMID: 32325198.
      View in: PubMed
    23. Kohli U, Nayak HM. SIDS associated RYR2 p.Arg2267His variant may lack pathogenicity. J Electrocardiol. 2020 May - Jun; 60:23-26. PMID: 32220801.
      View in: PubMed
    24. Tung R, Raiman M, Liao H, Zhan X, Chung FP, Nagel R, Hu H, Jian J, Shatz DY, Besser SA, Aziz ZA, Beaser AD, Upadhyay GA, Nayak HM, Nishimura T, Xue Y, Wu S. Simultaneous Endocardial and Epicardial Delineation of 3D Reentrant Ventricular Tachycardia. J Am Coll Cardiol. 2020 03 03; 75(8):884-897. PMID: 32130924.
      View in: PubMed
    25. Jiang R, Beaser AD, Aziz Z, Upadhyay GA, Nayak HM, Tung R. High-Density Grid Catheter for Detailed Mapping of Sinus Rhythm and Scar-Related Ventricular Tachycardia: Comparison With a Linear Duodecapolar Catheter. JACC Clin Electrophysiol. 2020 03; 6(3):311-323. PMID: 32192682.
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    26. Jameria Z, Mokhlesi B, Sauser E, Holloway S, Upadhyay GA, Nayak HM. First report of concomitant subcutaneous defibrillator and phrenic nerve stimulator implantation in a patient with severe central sleep apnea and left ventricular systolic dysfunction. HeartRhythm Case Rep. 2020 Jan; 6(1):44-47. PMID: 31956502.
      View in: PubMed
    27. Upadhyay GA, Cherian T, Shatz DY, Beaser AD, Aziz Z, Ozcan C, Broman MT, Nayak H, Tung R. Response by Upadhyay et al to Letter Regarding Article, "Intracardiac Delineation of Septal Conduction in Left Bundle-Branch Block Patterns: Mechanistic Evidence of Left Intrahisian Block Circumvented by His Bundle Pacing". Circulation. 2019 10; 140(14):e713-e714. PMID: 31567009.
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    28. Aziz Z, Shatz D, Raiman M, Upadhyay GA, Beaser AD, Besser SA, Shatz NA, Fu Z, Jiang R, Nishimura T, Liao H, Nayak HM, Tung R. Targeted Ablation of Ventricular Tachycardia Guided by Wavefront Discontinuities During Sinus Rhythm: A New Functional Substrate Mapping Strategy. Circulation. 2019 10 22; 140(17):1383-1397. PMID: 31533463.
      View in: PubMed
    29. Jameria ZA, Nishimura T, Nayak HM, Tung R. Acceleration of a wide complex tachycardia: What is the mechanism? Heart Rhythm. 2019 09; 16(9):1443-1445. PMID: 31472748.
      View in: PubMed
    30. Upadhyay GA, Vijayaraman P, Nayak HM, Verma N, Dandamudi G, Sharma PS, Saleem M, Mandrola J, Genovese D, Oren JW, Subzposh FA, Aziz Z, Beaser A, Shatz D, Besser S, Lang RM, Trohman RG, Knight BP, Tung R. On-treatment comparison between corrective His bundle pacing and biventricular pacing for cardiac resynchronization: A secondary analysis of the His-SYNC Pilot Trial. Heart Rhythm. 2019 12; 16(12):1797-1807. PMID: 31096064.
      View in: PubMed
    31. Upadhyay GA, Vijayaraman P, Nayak HM, Verma N, Dandamudi G, Sharma PS, Saleem M, Mandrola J, Genovese D, Tung R. His Corrective Pacing or Biventricular Pacing for Cardiac Resynchronization in Heart Failure. J Am Coll Cardiol. 2019 07 09; 74(1):157-159. PMID: 31078637.
      View in: PubMed
    32. Kohli U, Aziz Z, Beaser AD, Nayak HM. A large deletion in RYR2 exon 3 is associated with nadolol and flecainide refractory catecholaminergic polymorphic ventricular tachycardia. Pacing Clin Electrophysiol. 2019 08; 42(8):1146-1154. PMID: 30912151.
      View in: PubMed
    33. Upadhyay GA, Cherian T, Shatz DY, Beaser AD, Aziz Z, Ozcan C, Broman MT, Nayak HM, Tung R. Intracardiac Delineation of Septal Conduction in Left Bundle-Branch Block Patterns. Circulation. 2019 04 16; 139(16):1876-1888. PMID: 30704273.
      View in: PubMed
    34. Jiang R, Buch E, Gima J, Upadhyay GA, Nayak HM, Beaser AD, Aziz Z, Shivkumar K, Tung R. Feasibility of percutaneous epicardial mapping and ablation for refractory atrial fibrillation: Insights into substrate and lesion transmurality. Heart Rhythm. 2019 08; 16(8):1151-1159. PMID: 30776449.
      View in: PubMed
    35. Guo J, Nayak HM, Besser SA, Beaser A, Aziz Z, Broman M, Ozcan C, Tung R, Upadhyay GA. Impact of Atrial Fibrillation Ablation on Recurrent Hospitalization: A Nationwide Cohort Study. JACC Clin Electrophysiol. 2019 03; 5(3):330-339. PMID: 30898236.
      View in: PubMed
    36. Hagopian R, O'Keefe-Baker V, Aziz Z, Beaser AD, Nayak HM. Malignant atrioventricular nodal reentry tachycardia resulting in cardiac arrest. HeartRhythm Case Rep. 2019 Mar; 5(3):173-175. PMID: 30891418.
      View in: PubMed
    37. Bukari A, Wali E, Deshmukh A, Aziz Z, Broman M, Beaser A, Upadhyay G, Nayak H, Tung R, Ozcan C. Prevalence and predictors of atrial arrhythmias in patients with sinus node dysfunction and atrial pacing. J Interv Card Electrophysiol. 2018 Dec; 53(3):365-371. PMID: 30293095.
      View in: PubMed
    38. McClelland I, Nayak HM, Tung R, Upadhyay GA. Respiratory rate trending as a cause for atrial lead noise: A first report in an implantable cardioverter-defibrillator patient. HeartRhythm Case Rep. 2018 Nov; 4(11):545-547. PMID: 30479957.
      View in: PubMed
    39. Chua K, Upadhyay GA, Lee E, Aziz Z, Beaser AD, Ozcan C, Broman M, Nayak HM, Tung R. High-resolution mapping of the triangle of Koch: Spatial heterogeneity of fast pathway atrionodal connections. Heart Rhythm. 2018 03; 15(3):421-429. PMID: 29081398.
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    40. Green J, Aziz Z, Nayak HM, Upadhyay GA, Moss JD, Tung R. "Left ventricular" AV nodal reentrant tachycardia: Case report and review of the literature. HeartRhythm Case Rep. 2016 Sep; 2(5):367-371. PMID: 28491712.
      View in: PubMed
    41. Oesterle A, Singh A, Balkhy H, Husain AN, Moyer D, Tung R, Nayak HM. Late presentation of constrictive pericarditis after limited epicardial ablation for inappropriate sinus tachycardia. HeartRhythm Case Rep. 2016 Sep; 2(5):441-445. PMID: 28491729.
      View in: PubMed
    42. Nayak HM. Cardiac Implantable Electronic Device Infection: Rise of Resistant Pathogens. JACC Clin Electrophysiol. 2016 Aug; 2(4):506-507. PMID: 29759873.
      View in: PubMed
    43. Thomas IC, Cork DP, Levy A, Nayak H, Beshai JF, Burke MC, Moss JD. ICD lead parameters, performance, and adverse events following continuous-flow LVAD implantation. Pacing Clin Electrophysiol. 2014 Apr; 37(4):464-72. PMID: 24237034.
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    44. Hansen JC, Moss JD, Nayak HM, Beshai JF. Out-of-service lead: abnormal presentation at follow-up. Heart Rhythm. 2013 Jan; 10(1):144-6. PMID: 22897978.
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    45. Mainigi SK, Cooper JM, Russo AM, Nayak HM, Lin D, Dixit S, Gerstenfeld EP, Hsia HH, Callans DJ, Marchlinski FE, Verdino RJ. Elevated defibrillation thresholds in patients undergoing biventricular defibrillator implantation: incidence and predictors. Heart Rhythm. 2006 Sep; 3(9):1010-6. PMID: 16945792.
      View in: PubMed
    46. Lin D, Hsia HH, Gerstenfeld EP, Dixit S, Callans DJ, Nayak H, Russo A, Marchlinski FE. Idiopathic fascicular left ventricular tachycardia: linear ablation lesion strategy for noninducible or nonsustained tachycardia. Heart Rhythm. 2005 Sep; 2(9):934-9. PMID: 16171747.
      View in: PubMed
    47. Russo AM, Sauer W, Gerstenfeld EP, Hsia HH, Lin D, Cooper JM, Dixit S, Verdino RJ, Nayak HM, Callans DJ, Patel V, Marchlinski FE. Defibrillation threshold testing: is it really necessary at the time of implantable cardioverter-defibrillator insertion? Heart Rhythm. 2005 May; 2(5):456-61. PMID: 15840466.
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    48. Dixit S, Gerstenfeld EP, Lin D, Callans DJ, Hsia HH, Nayak HM, Zado E, Marchlinski FE. Identification of distinct electrocardiographic patterns from the basal left ventricle: distinguishing medial and lateral sites of origin in patients with idiopathic ventricular tachycardia. Heart Rhythm. 2005 May; 2(5):485-91. PMID: 15840472.
      View in: PubMed
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