Hasegawa, Shunji Hashida, Tadashi Hashiguchi, Naotaka Hashiguchi, Takeo Hasiec, Andrzej, Institute of Cardiology, Arrhythmia Department, Warsaw, Poland Hassan, Mustafa Hasselblad, Vic Hat, Marta Hatahet, Hazem Hatem, Engin, Ahi Evren Chest Cardiovascular Surgery Education and Research Hospital Hatipoglu, Piraye Kervancioglu i E. Savas, Department of Anatomy, Faculty of Medicine, Dicle University, Diyarbakir, Turkey Hatipoglu, Suzan, Kartal Kosuyolu Heart Education and Research Hospital, Istanbul Hatipsoylu, Erdinç Hauck, Christian Haverkamp, Wilhelm Hawkins, Nathaniel M., Division of Cardiology, University of British Columbia, Vancouver, Canada Hawranek, Michał Hawranek, Michał, I Katedra i Oddział Kliniczny Kardiologii Śląskiej Akademii Medycznej, Śląskie Centrum Chorób Serca w Zabrzu Hawranek, Michał, 3rd Department of Cardiology, Silesian Centre for Heart Diseases, Medical University of Silesia, Zabrze, Poland Hawranek, Michał, 3rd Department of Cardiology, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia, Katowice, Poland Hawranek, Michał (Poland) Hay, Ilan Hayakawa, Masato Hayashi, Masaomi Hayashi, Ou