PUBLICATIONS

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  1. Karamichalis JM, Hammer PE. Innovation and science: The future of valve design. J Thorac Cardiovasc Surg. 2018 Oct; 156(4):1641. View abstract
  2. Jolley MA, Hammer PE, Ghelani SJ, Adar A, Sleeper LA, Lacro RV, Marx GR, Nathan M, Harrild DM. Three-Dimensional Mitral Valve Morphology in Children and Young Adults With Marfan Syndrome. J Am Soc Echocardiogr. 2018 Nov; 31(11):1168-1177.e1. View abstract
  3. Hammer PE, Baird CW, Del Nido PJ, Marx GR. Dehiscence of patch augmentation of a left-sided atrioventricular valve related to strenuous isometric exercise: Case report and failure analysis. J Thorac Cardiovasc Surg. 2018 Oct; 156(4):e165-e168. View abstract
  4. Wamala I, Saeed M, Ghelani SJ, Gauvreau K, Hammer PE, Vasilyev NV, Del Nido PJ. A leaflet plication clip is an effective surgical template for mitral valve foldoplasty. Eur J Cardiothorac Surg. 2018 05 01; 53(5):939-944. View abstract
  5. Villard PF, Hammer PE, Perrin DP, Del Nido PJ, Howe RD. Fast image-based mitral valve simulation from individualized geometry. Int J Med Robot. 2018 Apr; 14(2). View abstract
  6. Karamichalis JM, Hammer PE. Designing valves: An art or science? J Thorac Cardiovasc Surg. 2018 Feb; 155(2):775-776. View abstract
  7. Feins EN, Lee Y, O'Cearbhaill ED, Vasilyev NV, Shimada S, Friehs I, Perrin D, Hammer PE, Yamauchi H, Marx G, Gosline A, Arabagi V, Karp JM, Del Nido PJ. A Growth-Accommodating Implant for Paediatric Applications. Nat Biomed Eng. 2017; 1:818-825. View abstract
  8. Hammer PE, Roberts EG, Emani SM, Del Nido PJ. Surgical reconstruction of semilunar valves in the growing child: Should we mimic the venous valve? A simulation study. J Thorac Cardiovasc Surg. 2017 Feb; 153(2):389-396. View abstract
  9. Hammer PE, Berra I, del Nido PJ. Surgical repair of congenital aortic regurgitation by aortic root reduction: A finite element study. J Biomech. 2015 Nov 05; 48(14):3883-9. View abstract
  10. Pacak CA, Hammer PE, MacKay AA, Dowd RP, Wang KR, Masuzawa A, Sill B, McCully JD, Cowan DB. Superparamagnetic iron oxide nanoparticles function as a long-term, multi-modal imaging label for non-invasive tracking of implanted progenitor cells. PLoS One. 2014; 9(9):e108695. View abstract
  11. Karamanos E, Teixeira PG, Sivrikoz E, Varga S, Chouliaras K, Okoye O, Hammer P. Intracranial pressure versus cerebral perfusion pressure as a marker of outcomes in severe head injury: a prospective evaluation. Am J Surg. 2014 Sep; 208(3):363-71. View abstract
  12. Hammer PE, Pacak CA, Howe RD, del Nido PJ. Straightening of curved pattern of collagen fibers under load controls aortic valve shape. J Biomech. 2014 Jan 22; 47(2):341-6. View abstract
  13. Hammer PE, del Nido PJ. Guidelines for sizing pericardium for aortic valve leaflet grafts. Ann Thorac Surg. 2013 Jul; 96(1):e25-7. View abstract
  14. Tenenholtz NA, Hammer PE, Fabozzo A, Feins EN, Del Nido PJ, Howe RD. Fast Simulation of Mitral Annuloplasty for Surgical Planning. Funct Imaging Model Heart. 2013 Jun; 7945:106-113. View abstract
  15. Wilbring M, Alexiou K, Tugtekin SM, Sill B, Hammer P, Schmidt T, Simonis G, Matschke K, Kappert U. Transapical transcatheter valve-in-valve implantation for deteriorated mitral valve bioprostheses. Ann Thorac Surg. 2013 Jan; 95(1):111-7. View abstract
  16. Hammer PE, Chen PC, del Nido PJ, Howe RD. Computational model of aortic valve surgical repair using grafted pericardium. J Biomech. 2012 Apr 30; 45(7):1199-204. View abstract
  17. Tenenholtz NA, Hammer PE, Schneider RJ, Vasilyev NV, Howe RD. On the Design of an Interactive, Patient-Specific Surgical Simulator for Mitral Valve Repair. Rep U S. 2011 Dec 31; 2011:1327-1332. View abstract
  18. Hammer PE, Sacks MS, del Nido PJ, Howe RD. Mass-spring model for simulation of heart valve tissue mechanical behavior. Ann Biomed Eng. 2011 Jun; 39(6):1668-79. View abstract
  19. Sill B, Roy N, Hammer PE, Triedman JK, Sigg DC, Kelly MF, Nedder A, Dunning PS, Cowan DB. Development of an ovine model of pediatric complete heart block. J Surg Res. 2011 Apr; 166(2):e103-8. View abstract
  20. Sill B, Hammer PE, Cowan DB. Optical mapping of Langendorff-perfused rat hearts. J Vis Exp. 2009 Aug 11; (30). View abstract
  21. Branco DM, Wolf CM, Sherwood M, Hammer PE, Kang PB, Berul CI. Cardiac electrophysiological characteristics of the mdx ( 5cv ) mouse model of Duchenne muscular dystrophy. J Interv Card Electrophysiol. 2007 Nov; 20(1-2):1-7. View abstract
  22. Soul JS, Hammer PE, Tsuji M, Saul JP, Bassan H, Limperopoulos C, Disalvo DN, Moore M, Akins P, Ringer S, Volpe JJ, Trachtenberg F, du Plessis AJ. Fluctuating pressure-passivity is common in the cerebral circulation of sick premature infants. Pediatr Res. 2007 Apr; 61(4):467-73. View abstract
  23. Tansey EE, Kwaku KF, Hammer PE, Cowan DB, Federman M, Levitsky S, McCully JD. Reduction and redistribution of gap and adherens junction proteins after ischemia and reperfusion. Ann Thorac Surg. 2006 Oct; 82(4):1472-9. View abstract
  24. Choi YH, Stamm C, Hammer PE, Kwaku KF, Marler JJ, Friehs I, Jones M, Rader CM, Roy N, Eddy MT, Triedman JK, Walsh EP, McGowan FX, del Nido PJ, Cowan DB. Cardiac conduction through engineered tissue. Am J Pathol. 2006 Jul; 169(1):72-85. View abstract
  25. Hammer PE, Saul JP. Resonance in a mathematical model of baroreflex control: arterial blood pressure waves accompanying postural stress. Am J Physiol Regul Integr Comp Physiol. 2005 Jun; 288(6):R1637-48. View abstract
  26. Maguire CT, Wakimoto H, Patel VV, Hammer PE, Gauvreau K, Berul CI. Implications of ventricular arrhythmia vulnerability during murine electrophysiology studies. Physiol Genomics. 2003 Sep 29; 15(1):84-91. View abstract
  27. Moran AM, Friehs I, Takeuchi K, Stamm C, Hammer PE, McGowan FX, del Nido PJ, Colan SD. Noninvasive serial evaluation of myocardial mechanics in pressure overload hypertrophy of rabbit myocardium. Herz. 2003 Feb; 28(1):52-62. View abstract
  28. Hammer PE, Brooks DH, Triedman JK. Estimation of entrainment response using electrograms from remote sites: validation in animal and computer models of reentrant tachycardia. J Cardiovasc Electrophysiol. 2003 Jan; 14(1):52-61. View abstract
  29. Gehrmann J, Meister M, Maguire CT, Martins DC, Hammer PE, Neer EJ, Berul CI, Mende U. Impaired parasympathetic heart rate control in mice with a reduction of functional G protein betagamma-subunits. Am J Physiol Heart Circ Physiol. 2002 Feb; 282(2):H445-56. View abstract
  30. Wakimoto H, Maguire CT, Kovoor P, Hammer PE, Gehrmann J, Triedman JK, Berul CI. Induction of atrial tachycardia and fibrillation in the mouse heart. Cardiovasc Res. 2001 Jun; 50(3):463-73. View abstract
  31. Gehrmann J, Hammer PE, Maguire CT, Wakimoto H, Triedman JK, Berul CI. Phenotypic screening for heart rate variability in the mouse. Am J Physiol Heart Circ Physiol. 2000 Aug; 279(2):H733-40. View abstract
  32. Hammer P, Litvack D, Saul JP. Interpreting open- and closed-loop transfer relations between cardiorespiratory parameters: lessons learned from a computer model of beat-to-beat cardiovascular regulation. Methods Inf Med. 1997 Dec; 36(4-5):237-40. View abstract